:root {
    --color-primary: #007AFF;
    --color-primary-light: #409CFF;
    --color-primary-dark: #0056CC;
    --color-primary-gradient: linear-gradient(135deg, #007AFF, #5E5CE6);
    
    --color-grade-5: #30D158;
    --color-grade-4: #FFD60A;
    --color-grade-3: #FF9F0A;
    --color-grade-2: #FF453A;
    
    --gradient-grade-5: linear-gradient(135deg, #32D74B, #30D158);
    --gradient-grade-4: linear-gradient(135deg, #FFD60A, #FF9F0A);
    --gradient-grade-3: linear-gradient(135deg, #FF9F0A, #FF9500);
    --gradient-grade-2: linear-gradient(135deg, #FF453A, #FF375F);
    
    --color-bg: #000000;
    --color-bg-secondary: #1C1C1E;
    --color-bg-tertiary: #2C2C2E;
    --color-bg-glass: rgba(28, 28, 30, 0.7);
    --color-bg-glass-light: rgba(255, 255, 255, 0.05);
    
    --color-text: #FFFFFF;
    --color-text-secondary: #8E8E93;
    --color-text-tertiary: #636366;
    
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(0, 122, 255, 0.2);
    
    --blur-backdrop: saturate(180%) blur(20px);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-circle: 50%;
    
    --transition-quick: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-academic: 0.8s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shared title gradient (header + loader) */
  --gp-title-gradient: linear-gradient(90deg,
    #507FD8 0%,
    #5D8FDA 28%,
    #7F8FB6 60%,
    #8A94A6 100%
  );
}

@media (prefers-color-scheme: light) {
    :root {
        --color-bg: #FFFFFF;
        --color-bg-secondary: #F2F2F7;
        --color-bg-tertiary: #E5E5EA;
        --color-bg-glass: rgba(242, 242, 247, 0.7);
        --color-bg-glass-light: rgba(0, 0, 0, 0.05);
        
        --color-text: #000000;
        --color-text-secondary: #3C3C43;
        --color-text-tertiary: #8E8E93;
        
        --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
        --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.1);
        --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.47059;
    letter-spacing: -0.022em;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    overflow-x: hidden;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) 
             env(safe-area-inset-bottom) env(safe-area-inset-left);
    transition: background-color var(--transition-smooth);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.loading {
    overflow: hidden;
}

/* ============================================
   Основные стили приложения
   ============================================ */
.academic-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px 130px;
    min-height: 100vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}



/* ===== Loader visibility bridge ===== */
/* Container is hidden while body has .loading (set in index.html). When loader finishes it removes .loading. */
body.loading #academic-container{
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body:not(.loading) #academic-container{
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.academic-header {
    margin-bottom: 24px;
    padding-top: 20px;
}

.header-glass {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border-radius: var(--radius-lg);
    padding: 1px;
    border: var(--glass-border);
    box-shadow: var(--shadow-md);
    
    position: relative;
    overflow: hidden;
}

.header-glass::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gp-title-gradient);
    opacity: 0.92;
    pointer-events: none;
}

.header-glass::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(1200px 180px at 50% 0%, rgba(245,245,247,0.16), transparent 62%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
}


.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--color-bg-glass);
    border-radius: var(--radius-lg);
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    position: relative;
}

.logo-sparkle {
    width: 52px;
    height: 52px;
    background: var(--gp-title-gradient, var(--color-primary-gradient, linear-gradient(135deg,#007AFF,#5AC8FA)));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    position: relative;
    overflow: hidden;
}

.logo-sparkle::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 70%
    );
    animation: sparkle-shine 3s ease-in-out infinite;
}

@keyframes sparkle-shine {
    0%, 100% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    50% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.app-title{
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 4px;

  background: var(--gp-title-gradient);
  background-size: 220% 100%;
  background-position: 0% 50%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.app-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-grade-5);
    border-radius: 50%;
    animation: status-pulse 2s ease-in-out infinite;
}

@keyframes status-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.glass-btn {
    width: 44px;
    height: 44px;
    background: var(--color-bg-glass-light);
    backdrop-filter: blur(10px);
    border: var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-quick);
    font-size: 18px;
    position: relative;
    overflow: hidden;
}

.glass-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-smooth);
}

.glass-btn:hover::before { left: 100%; }
.glass-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.glass-btn:active { transform: translateY(0); }

.academic-nav {
    /* iOS: keep nav pinned to viewport (not to scroll container)
       and avoid "floating up" during scroll/URL-bar resize. */
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px calc(20px + env(safe-area-inset-bottom));
    z-index: 100;
    transform: translateZ(0);
}

.nav-blur {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 8px;
    display: flex;
    gap: 8px;
    box-shadow: var(--shadow-lg);
}

.nav-card {
    flex: 1;
    padding: 16px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    position: relative;
    border-radius: var(--radius-lg);
    transition: all var(--transition-smooth);
    overflow: hidden;
}

.nav-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-smooth);
    z-index: 1;
}

.nav-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.nav-card i {
    font-size: 22px;
    transition: all var(--transition-smooth);
}

.nav-card span {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all var(--transition-smooth);
}

.nav-card.active {
    color: white;
    transform: translateY(-4px);
}

.nav-card.active .nav-glow { opacity: 1; }
.nav-card.active i { transform: scale(1.1); }
.nav-card:hover:not(.active) {
    background: var(--color-bg-glass-light);
    transform: translateY(-2px);
}

.academic-main {
    position: relative;
    min-height: 60vh;
}

.view-container {
    display: none;
    animation: view-entrance 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes view-entrance {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.view-container.active { display: block; }

.view-header {
    margin-bottom: 32px;
    animation: header-entrance 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes header-entrance {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.view-title {
    font-size: 36px;
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--color-text), var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.view-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.grade-form-main {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 32px;
    margin-bottom: 32px;
    animation: slide-up 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slide-up {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-section {
    margin-bottom: 32px;
}

.section-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.subject-select-main {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
}

.subject-option-main {
    background: var(--color-bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-smooth);
    position: relative;
}

.subject-option-main:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.subject-option-main.selected {
    border-color: var(--color-primary);
    background: var(--color-bg-glass);
}

.subject-option-main i {
    font-size: 24px;
    color: var(--color-primary);
}

.subject-option-main .subject-name {
    font-size: 16px;
    font-weight: 600;
    text-align: center;
}

.empty-subjects {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px 20px;
    background: var(--color-bg-glass);
    border-radius: var(--radius-lg);
    border: var(--glass-border);
}

.empty-subjects i {
    font-size: 48px;
    color: var(--color-primary);
    margin-bottom: 16px;
    opacity: 0.7;
}

.empty-subjects p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.grade-grid-main {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.grade-main-btn {
    background: var(--color-bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    padding: 24px 12px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-smooth);
}

.grade-main-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.grade-main-btn.active {
    border-color: var(--color-primary);
    background: var(--color-bg-glass);
}

.grade-main-btn[data-grade="5"].active {
    border-color: var(--color-grade-5);
    background: rgba(48, 209, 88, 0.1);
}

.grade-main-btn[data-grade="4"].active {
    border-color: var(--color-grade-4);
    background: rgba(255, 214, 10, 0.1);
}

.grade-main-btn[data-grade="3"].active {
    border-color: var(--color-grade-3);
    background: rgba(255, 159, 10, 0.1);
}

.grade-main-btn[data-grade="2"].active {
    border-color: var(--color-grade-2);
    background: rgba(255, 69, 58, 0.1);
}

.grade-main-number {
    font-size: 32px;
    font-weight: 900;
    line-height: 1;
}

.grade-main-btn[data-grade="5"] .grade-main-number { color: var(--color-grade-5); }
.grade-main-btn[data-grade="4"] .grade-main-number { color: var(--color-grade-4); }
.grade-main-btn[data-grade="3"] .grade-main-number { color: var(--color-grade-3); }
.grade-main-btn[data-grade="2"] .grade-main-number { color: var(--color-grade-2); }

.grade-main-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-secondary);
}
.result-section {
    margin: 32px 0;
}

.result-card {
    background: var(--color-primary-gradient);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.2) 50%, transparent 70%);
    animation: result-shimmer 3s ease-in-out infinite;
}

@keyframes result-shimmer {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.result-label {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    opacity: 0.9;
}

.result-value {
    font-size: 64px;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 8px;
}

.result-hint {
    font-size: 14px;
    opacity: 0.8;
}

.action-buttons {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.action-btn {
    padding: 20px;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all var(--transition-smooth);
}

.action-btn.primary {
    background: var(--color-primary-gradient);
    color: white;
}

.action-btn.secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border: var(--glass-border);
}

.action-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.action-btn:active {
    transform: translateY(-2px);
}

.quick-goals-card {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    margin-top: 32px;
}

.quick-goals-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.quick-goals-card p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.accent-btn {
    padding: 16px 32px;
    background: var(--color-primary-gradient);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all var(--transition-smooth);
}

.accent-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.overall-stat-card {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
}

.stat-icon-large {
    width: 80px;
    height: 80px;
    background: var(--color-primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.stat-value-large {
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-grade-5));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-progress {
    margin-top: 20px;
}

.progress-bar {
    height: 8px;
    background: var(--color-bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-grade-2), var(--color-grade-3), var(--color-grade-4), var(--color-grade-5));
    border-radius: 4px;
    width: 0%;
    transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.subjects-stats-section {
    margin-top: 32px;
}

.subjects-stats-grid {
    display: grid;
    gap: 20px;
}

.subject-stat-card {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: relative;
}

.subject-stat-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.subject-stat-icon {
    width: 48px;
    height: 48px;
    background: var(--subject-color, var(--color-primary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
}

.subject-stat-info h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.subject-stat-average {
    font-size: 32px;
    font-weight: 900;
    color: var(--subject-color, var(--color-primary));
}

.subject-stat-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 20px;
}

.stat-detail {
    text-align: center;
}

.detail-value {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 4px;
}

.detail-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.empty-stats {
    text-align: center;
    padding: 60px 20px;
    background: var(--color-bg-glass);
    border-radius: var(--radius-lg);
    border: var(--glass-border);
}

.empty-stats i {
    font-size: 48px;
    color: var(--color-primary);
    margin-bottom: 16px;
    opacity: 0.7;
}

.empty-stats p {
    color: var(--color-text-secondary);
}

.subject-selector-card {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 32px;
}

.selector-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--color-text);
}

.subject-selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 16px;
}

.subject-option-fancy {
    background: var(--color-bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    transition: all var(--transition-smooth);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.subject-option-fancy::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-smooth);
    z-index: 1;
}

.subject-option-fancy span {
    position: relative;
    z-index: 2;
    text-align: center;
}

.subject-option-fancy .option-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.subject-option-fancy .option-average {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-secondary);
}

.subject-option-fancy:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.subject-option-fancy.selected {
    border-color: var(--color-primary);
    background: var(--color-bg-glass);
}

.subject-option-fancy.selected::before {
    opacity: 0.1;
}

.glassmorph {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
}

.calculator-card {
    padding: 32px;
    margin-top: 32px;
    position: relative;
    overflow: hidden;
}

.calculator-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--color-primary-gradient);
}

.calculator-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.calculator-current {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.calculator-current span:first-child {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.current-value {
    font-size: 36px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.target-selector {
    display: flex;
    gap: 12px;
}

.target-option {
    width: 56px;
    height: 56px;
    border: 2px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    background: var(--color-bg-glass);
    color: var(--color-text-secondary);
    font-size: 24px;
    font-weight: 800;
    cursor: pointer;
    transition: all var(--transition-smooth);
}

.target-option:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.target-option.active {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: white;
    transform: scale(1.1);
}

.target-option[data-target="5"].active { background: var(--color-grade-5); border-color: var(--color-grade-5); }
.target-option[data-target="4"].active { background: var(--color-grade-4); border-color: var(--color-grade-4); }
.target-option[data-target="3"].active { background: var(--color-grade-3); border-color: var(--color-grade-3); }

.grade-selector-section {
    margin-bottom: 32px;
}

.grade-selector-section h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

.grade-selector-fancy {
    display: flex;
    gap: 16px;
}

.grade-option-fancy {
    flex: 1;
    padding: 24px;
    background: var(--color-bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-smooth);
}

.grade-option-fancy:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.grade-option-fancy.active {
    border-color: var(--color-primary);
    background: var(--color-bg-glass);
}

.grade-option-fancy[data-grade="5"] .grade-number { color: var(--color-grade-5); }
.grade-option-fancy[data-grade="4"] .grade-number { color: var(--color-grade-4); }
.grade-option-fancy[data-grade="3"] .grade-number { color: var(--color-grade-3); }

.grade-number {
    font-size: 40px;
    font-weight: 900;
    line-height: 1;
}

.grade-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.calculate-btn-accent {
    width: 100%;
    padding: 24px;
    background: var(--color-primary-gradient);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
    margin-bottom: 32px;
}

.btn-sparkle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.2) 50%, transparent 70%);
    animation: sparkle-move 2s ease-in-out infinite;
    pointer-events: none;
}

@keyframes sparkle-move {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.calculate-btn-accent:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.calculate-btn-accent:active {
    transform: translateY(-2px);
}

.calculation-result-glass {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-smooth);
}

.calculation-result-glass.show {
    opacity: 1;
    transform: translateY(0);
}

.result-sparkle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 40%, rgba(0, 122, 255, 0.1) 50%, transparent 60%);
    animation: result-sparkle 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes result-sparkle {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.result-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.result-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

.result-number {
    font-size: 64px;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--color-grade-5), var(--color-grade-4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: number-count 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

}

.result-number.is-long {
    font-size: 48px;
    letter-spacing: -1px;
}

@keyframes number-count {
    from { opacity: 0; transform: scale(0.5) rotate(-10deg); }
    to { opacity: 1; transform: scale(1) rotate(0); }
}

.result-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.result-subtext {
    font-size: 14px;
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

.academic-fab {
    position: fixed;
    bottom: 100px;
    right: 20px;
    width: 64px;
    height: 64px;
    background: var(--color-primary-gradient);
    border: none;
    border-radius: var(--radius-circle);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-bounce);
    z-index: 90;
    position: relative;
    overflow: hidden;
}

.fab-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.3) 50%, transparent 70%);
    animation: fab-glow 3s ease-in-out infinite;
}

@keyframes fab-glow {
    0%, 100% { transform: translateX(-100%) rotate(45deg); }
    50% { transform: translateX(100%) rotate(45deg); }
}

.academic-fab:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: var(--shadow-glow);
}

.academic-fab:active {
    transform: scale(0.95);
}

.academic-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-academic);
}

.academic-modal.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.modal-glass {
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transform: translateY(40px) scale(0.95);
    transition: all var(--transition-academic);
}

.modal-glass--wide {
    max-width: 720px;
}


.academic-modal.active .modal-glass {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
}

.modal-close {
    width: 44px;
    height: 44px;
    background: var(--color-bg-glass-light);
    border: var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all var(--transition-quick);
}

.modal-close:hover {
    background: var(--color-bg-tertiary);
    transform: rotate(90deg);
}

.modal-body {
    padding: 24px;
    max-height: 60vh;
    overflow-y: auto;
}

.subject-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
}

.subject-option-modal {
    background: var(--color-bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-smooth);
}

.subject-option-modal:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.subject-option-modal i {
    font-size: 32px;
    color: var(--color-primary);
}

.subject-option-modal .subject-name-modal {
    font-size: 16px;
    font-weight: 600;
    text-align: center;
}

.undo-toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    width: 90%;
    max-width: 400px;
    z-index: 1001;
    opacity: 0;
    transition: all var(--transition-smooth);
}

.undo-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-glass {
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-lg);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.toast-content i {
    font-size: 20px;
    color: var(--color-primary);
}

.toast-text {
    flex: 1;
}

.toast-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.toast-subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.toast-close {
    width: 32px;
    height: 32px;
    background: var(--color-bg-glass-light);
    border: var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all var(--transition-quick);
}

.toast-close:hover {
    background: var(--color-bg-tertiary);
    transform: rotate(90deg);
}

@media (max-width: 480px) {
    .grade-grid-main {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .subject-select-main {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .overall-stat-card {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .subject-selector-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .grade-selector-fancy {
        flex-direction: column;
    }
    
    .academic-container {
        padding: 0 16px 90px;
    }
    
    .view-title {
        font-size: 28px;
    }
    
    .nav-blur {
        padding: 6px;
    }
    
    .nav-card {
        padding: 12px;
    }
}

@supports (-webkit-touch-callout: none) {
    body {
        -webkit-overflow-scrolling: touch;
    }
    
    .academic-nav {
        bottom: max(20px, env(safe-area-inset-bottom));
    }
    
    .academic-fab {
        bottom: max(100px, calc(env(safe-area-inset-bottom) + 80px));
    }
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 4px;
}

/* ============================================
   СЛАЙДЕР ОТ 1 ДО 10 СО ЗНАЧЕНИЯМИ 1, 5, 10
   ============================================ */

.weight-slider-wrapper {
    width: 100%;
    padding: 20px 0 30px;
    background: var(--color-bg-glass);
    backdrop-filter: var(--blur-backdrop);
    border: var(--glass-border);
    border-radius: var(--radius-xl);
    margin-top: 12px;
    position: relative;
}

/* Основной контейнер слайдера */
.weight-slider-container {
    position: relative;
    padding: 0 40px; /* Отступы по бокам */
    height: 80px; /* Достаточно для трека и меток */
}

/* Трек слайдера */
.slider-track-wrapper {
    position: relative;
    width: 100%;
    height: 8px;
    margin: 26px 0 12px; /* Вертикальные отступы */
}

/* Серый фон трека */
.slider-track-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: var(--color-bg-tertiary);
    border-radius: 4px;
}

/* Синий прогресс */
.slider-track-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: var(--color-primary);
    border-radius: 4px 0 0 4px;
    transition: width 0.3s ease;
    width: 0%; /* Начальное значение для 1 (0%) */
}

/* Сам input слайдера */
#weight-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: transparent;
    border-radius: 4px;
    outline: none;
    margin: 0;
    padding: 0;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 3;
    cursor: pointer;
}

/* Ползунок */
#weight-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 4px solid white;
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
    cursor: grab;
    
    /* Центрируем ползунок относительно трека */
    margin-top: -16px; /* (40px - 8px) / 2 = 16px */
    
    transition: all 0.2s ease;
}

#weight-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
    transform: scale(1.1);
    box-shadow: 0 12px 32px rgba(0, 122, 255, 0.6);
}

#weight-slider::-moz-range-thumb {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 4px solid white;
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
    cursor: grab;
    margin-top: -16px;
}

/* Контейнер для меток с CSS Grid - ключевой момент! */
.slider-marks-container {
    display: grid;
    grid-template-columns: auto 1fr auto 1fr auto;
    align-items: center;
    width: 100%;
    position: relative;
    margin-top: 12px;
    user-select: none;
}

/* Каждая метка занимает свою колонку в гриде */
.slider-mark {
    font-weight: 700;
    color: var(--color-text-tertiary);
    font-size: 14px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    padding: 4px 8px;
    border-radius: 6px;
}

/* Эффект наведения на метки */
.slider-mark:hover {
    background: rgba(0, 122, 255, 0.08);
}

/* Линии под метками */
.slider-mark::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 12px;
    background: var(--color-bg-tertiary);
    border-radius: 1px;
    transition: all 0.2s ease;
}

/* Активная метка */
.slider-mark.active {
    color: var(--color-primary);
    font-weight: 900;
    font-size: 16px;
    background: rgba(0, 122, 255, 0.1);
}

.slider-mark.active::before {
    background: var(--color-primary);
    height: 16px;
    width: 3px;
}

/* Пустые промежуточные колонки грида - обеспечивают равное расстояние */
.grid-spacer {
    /* Эти элементы автоматически растягиваются */
    height: 1px;
}

/* Текущее значение */
.weight-current {
    margin-top: 25px;
    font-size: 16px;
    color: var(--color-text-secondary);
    text-align: center;
    font-weight: 600;
}

.weight-current strong {
    font-size: 28px;
    font-weight: 900;
    color: var(--color-primary);
    margin-left: 8px;
    display: inline-block;
    min-width: 30px;
}

/* Мобильная адаптация */
@media (max-width: 480px) {
    .weight-slider-container {
        padding: 0 30px;
        height: 76px;
    }
    
    #weight-slider::-webkit-slider-thumb {
        width: 36px;
        height: 36px;
        border: 3px solid white;
        margin-top: -14px; /* (36px - 8px) / 2 = 14px */
    }
    
    #weight-slider::-moz-range-thumb {
        width: 36px;
        height: 36px;
        border: 3px solid white;
        margin-top: -14px;
    }
    
    .slider-mark {
        font-size: 13px;
        padding: 3px 6px;
    }
    
    .slider-mark.active {
        font-size: 15px;
    }
}

/* Стили для опасной кнопки */
.glass-btn.danger {
    color: #FF453A;
    border-color: rgba(255, 69, 58, 0.3);
}

.glass-btn.danger:hover {
    background: rgba(255, 69, 58, 0.1);
    border-color: rgba(255, 69, 58, 0.5);
}

.glass-btn.danger:active {
    background: rgba(255, 69, 58, 0.2);
}


/* ============================================
   GP FIX: Premium visual thumb + perfect mark alignment (cross-device)
   ============================================ */

/* Fix: plus icon inside accent button in empty state should not inherit primary blue */
.empty-subjects .accent-btn i {
    color: currentColor !important;
    opacity: 1 !important;
}

/* Make marks positionable */
.slider-marks-container {
    display: block !important;
    grid-template-columns: none !important;
    position: relative !important;
    width: 100% !important;
    height: 28px !important;
    margin-top: 14px !important;
}

.slider-mark {
    position: absolute !important;
    top: 0 !important;
    left: 0;
    transform: translateX(-50%);
    will-change: transform, left;
}

.grid-spacer {
    display: none !important;
}

/* Hide native thumb (we draw our own) but keep native input for interaction */
.slider-track-wrapper {
    --gp-thumb-size: 40px;
    --gp-thumb-border: 4px;
}

@media (max-width: 480px) {
    .slider-track-wrapper {
        --gp-thumb-size: 36px;
        --gp-thumb-border: 3px;
    }
}

/* Increase hit-area and keep the native slider interactive */
#weight-slider {
    height: var(--gp-thumb-size) !important;
    top: calc(4px - (var(--gp-thumb-size) / 2)) !important; /* 4px = center of 8px track */
    opacity: 0 !important;
}

#weight-slider::-webkit-slider-thumb { opacity: 0 !important; }
#weight-slider::-moz-range-thumb { opacity: 0 !important; border: 0 !important; }

/* Premium visual thumb */
.gp-slider-thumb {
    position: absolute;
    top: 4px;               /* center of the 8px track */
    left: 0%;
    width: var(--gp-thumb-size);
    height: var(--gp-thumb-size);
    border-radius: 999px;
    background: var(--color-primary);
    border: var(--gp-thumb-border) solid rgba(255, 255, 255, 0.96);
    box-shadow:
        0 12px 34px rgba(0, 122, 255, 0.35),
        0 2px 10px rgba(0, 0, 0, 0.20);
    transform: translate(-50%, -50%);
    pointer-events: none;
    will-change: transform, left, box-shadow;
    transition: transform 160ms ease, box-shadow 160ms ease;
}

.slider-track-wrapper.is-dragging .gp-slider-thumb {
    transform: translate(-50%, -50%) scale(1.08);
    box-shadow:
        0 16px 44px rgba(0, 122, 255, 0.48),
        0 2px 12px rgba(0, 0, 0, 0.22);
}


/* =========================
   Settings modal
   ========================= */

.settings-stack{
    display: grid;
    gap: 14px;
}

.settings-block-title{
    font-size: 16px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.settings-block-subtitle{
    margin-top: 6px;
    font-size: 13px;
    line-height: 1.35;
    color: var(--color-text-secondary);
}

.action-btn.danger{
    padding: 16px 18px;
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 800;
    border: 1px solid rgba(255, 69, 58, 0.35);
    background: rgba(255, 69, 58, 0.12);
    color: #FF453A;
    box-shadow: none;
}

.action-btn.danger:hover{
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: rgba(255, 69, 58, 0.16);
    border-color: rgba(255, 69, 58, 0.50);
}

.action-btn.danger:active{
    transform: translateY(-1px);
}

.settings-divider{
    height: 1px;
    width: 100%;
    background: rgba(255,255,255,0.08);
}

.settings-coming{
    text-align: center;
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(245,245,247,0.58);
    padding-top: 4px;
}


.settings-card{
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    padding: 14px 14px 16px;
    box-shadow: 0 10px 28px rgba(0,0,0,0.26);
    backdrop-filter: var(--blur-backdrop);
}

.settings-card--danger{
    border-color: rgba(255, 69, 58, 0.22);
}

.settings-card-head{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:12px;
    margin-bottom: 12px;
}

.settings-pill{
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(245,245,247,0.72);
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.10);
    padding: 6px 10px;
    border-radius: 999px;
}

.settings-block-title{
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.settings-block-subtitle{
    font-size: 12px;
    margin-top: 2px;
    color: rgba(245,245,247,0.62);
}

.settings-form{
    display:flex;
    flex-direction:column;
    gap: 12px;
}

.settings-row{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

@media (max-width: 620px){
    .settings-row{ grid-template-columns: 1fr; }
}

.settings-row--actions{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.settings-field{
    display:flex;
    flex-direction:column;
    gap: 6px;
    font-size: 12px;
    color: rgba(245,245,247,0.70);
}

.settings-field span{ opacity: 0.9; }

.settings-checkbox{
    display:flex;
    align-items:center;
    gap: 10px;
    font-size: 12px;
    color: rgba(245,245,247,0.72);
}

.settings-checkbox input{
    width: 16px;
    height: 16px;
    accent-color: #0A84FF;
}

.settings-meta{
    display:flex;
    flex-direction:column;
    gap: 6px;
}

.settings-note{
    font-size: 12px;
    color: rgba(245,245,247,0.56);
}

.settings-status{
    min-height: 18px;
    font-size: 12px;
    color: rgba(245,245,247,0.72);
}

.settings-status.is-ok{ color: rgba(52, 199, 89, 0.88); }
.settings-status.is-error{ color: rgba(255, 69, 58, 0.92); }

.settings-devlist{ display:flex; flex-direction:column; gap:8px; margin-top: 12px; }
.settings-devitem{ font-size: 12px; color: rgba(245,245,247,0.66); padding-left: 12px; position: relative; }
.settings-devitem::before{ content:''; position:absolute; left:0; top: 0.6em; width:6px; height:6px; border-radius:999px; background: rgba(245,245,247,0.28); }

.danger-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap: 10px;
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid rgba(255, 69, 58, 0.26);
    background: rgba(255, 69, 58, 0.10);
    color: rgba(255, 69, 58, 0.96);
    font-weight: 600;
}

.danger-btn:hover{ background: rgba(255, 69, 58, 0.14); }



.primary-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid rgba(10, 132, 255, 0.32);
    background: rgba(10, 132, 255, 0.16);
    color: rgba(245,245,247,0.96);
    box-shadow: 0 14px 36px rgba(10,132,255,0.20);
    transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.primary-btn:hover{
    background: rgba(10, 132, 255, 0.20);
    border-color: rgba(10, 132, 255, 0.42);
}

.primary-btn:active{
    transform: scale(0.98);
}


/* Settings modal polish */
.settings-stack{
    display:flex;
    flex-direction:column;
    gap: 14px;
}

.settings-form{
    display:flex;
    flex-direction:column;
    gap: 12px;
    margin-top: 12px;
}

.field{
    display:flex;
    flex-direction:column;
    gap: 8px;
}

.field-label{
    font-size: 12px;
    color: rgba(245,245,247,0.70);
    letter-spacing: 0.2px;
}

.input{
    width: 100%;
    padding: 12px 12px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.06);
    color: rgba(245,245,247,0.92);
    outline: none;
    transition: transform 140ms ease, background 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.input::file-selector-button{
    margin-right: 10px;
    border: 1px solid rgba(255,255,255,0.14);
    background: rgba(255,255,255,0.06);
    color: rgba(245,245,247,0.92);
    padding: 10px 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.input::file-selector-button:hover{
    background: rgba(255,255,255,0.08);
}

.input:focus{
    border-color: rgba(10,132,255,0.55);
    box-shadow: 0 0 0 4px rgba(10,132,255,0.18);
}

.checkbox{
    display:flex;
    align-items:center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.10);
    background: rgba(255,255,255,0.04);
    color: rgba(245,245,247,0.88);
    user-select:none;
}

.checkbox input{
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
}

.settings-actions{
    display:flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.06);
    color: rgba(245,245,247,0.92);
    cursor:pointer;
    transition: transform 140ms ease, background 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.btn:hover{
    transform: translateY(-1px);
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.16);
}

.btn:active{
    transform: translateY(0px);
}

.btn.primary{
    border-color: rgba(10, 132, 255, 0.32);
    background: rgba(10, 132, 255, 0.16);
    box-shadow: 0 14px 36px rgba(10, 132, 255, 0.18);
}

.btn.primary:hover{
    background: rgba(10, 132, 255, 0.20);
    border-color: rgba(10, 132, 255, 0.40);
}

.btn:disabled{
    opacity: 0.46;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.settings-hint{
    font-size: 12px;
    line-height: 1.45;
    color: rgba(245,245,247,0.68);
}

.modal-header{
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.modal-body{
    padding: 16px 18px 18px;
}

.modal-title{
    letter-spacing: 0.2px;
}



/* =========================================================
   GradePro System Layer (Level / EXP / Quests)
   ========================================================= */

.system-grid{
    display:grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media (min-width: 920px){
    .system-grid{
        grid-template-columns: 1.1fr 1.4fr;
        grid-template-areas:
            "profile quests"
            "log     quests";
        align-items:start;
    }
    .system-profile{ grid-area: profile; }
    .system-quests{ grid-area: quests; }
    .system-log{ grid-area: log; }
}

.system-card{
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: 18px;
    padding: 16px;
    box-shadow: 0 18px 60px rgba(0,0,0,0.28);
    backdrop-filter: blur(18px);
}

.system-card-title{
    font-size: 13px;
    letter-spacing: .2px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.system-profile-top{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.system-rank{
    width: 54px;
    height: 54px;
    border-radius: 16px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight: 800;
    font-size: 20px;
    color: var(--color-text-primary);
    background: radial-gradient(circle at 30% 20%, rgba(0,122,255,0.35), rgba(0,0,0,0));
    border: 1px solid rgba(0,122,255,0.35);
}

.system-level, .system-streak{
    display:flex;
    flex-direction:column;
    gap: 2px;
}

.system-level-label, .system-streak-label{
    font-size: 12px;
    color: var(--color-text-secondary);
}

.system-level-value{
    font-size: 22px;
    font-weight: 800;
}

.system-streak-value{
    font-size: 18px;
    font-weight: 700;
}

.system-exp-row{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-bottom: 8px;
}

.system-exp-label{
    font-size: 12px;
    color: var(--color-text-secondary);
}

.system-exp-value{
    font-size: 12px;
    color: var(--color-text-primary);
    opacity: .9;
}

.system-exp-bar{
    height: 10px;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    overflow:hidden;
    border: 1px solid rgba(255,255,255,0.08);
}

.system-exp-bar-fill{
    height: 100%;
    width: 0%;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(0,122,255,0.85), rgba(90,200,250,0.85));
    box-shadow: 0 10px 24px rgba(0,122,255,0.20);
    transition: width 240ms ease;
}

.system-exp-hint{
    margin-top: 10px;
    font-size: 12px;
    color: var(--color-text-secondary);
}

.system-quest-list{
    display:flex;
    flex-direction:column;
    gap: 10px;
}

.system-quest{
    padding: 12px;
    border-radius: 16px;
    background: rgba(0,0,0,0.15);
    border: 1px solid rgba(255,255,255,0.08);
}

.system-quest.ready{
    border-color: rgba(48,209,88,0.30);
    background: rgba(48,209,88,0.06);
}

.system-quest.claimed{
    opacity: .65;
}

.system-quest-title{
    font-size: 13px;
    font-weight: 650;
    line-height: 1.25;
    margin-bottom: 10px;
}

.system-quest-bar{
    height: 8px;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    overflow:hidden;
    border: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 10px;
}

.system-quest-bar-fill{
    height: 100%;
    width: 0%;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(255,214,10,0.75), rgba(255,159,10,0.75));
    transition: width 240ms ease;
}

.system-quest-meta{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap: 10px;
}

.system-quest-progress{
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* Tiny button set for system view */
.gp-btn{
    border: none;
    border-radius: 999px;
    padding: 10px 12px;
    font-size: 12px;
    font-weight: 650;
    cursor: pointer;
    transition: transform 160ms ease, opacity 160ms ease, box-shadow 160ms ease;
    white-space: nowrap;
}

.gp-btn:disabled{
    opacity: .55;
    cursor: default;
}

.gp-btn.accent{
    color: #0b0b0c;
    background: linear-gradient(135deg, rgba(48,209,88,0.95), rgba(48,209,88,0.75));
    box-shadow: 0 14px 34px rgba(48,209,88,0.18);
}

.gp-btn.ghost{
    color: var(--color-text-primary);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.10);
}

.gp-btn:not(:disabled):active{
    transform: translateY(1px) scale(0.99);
}

.system-log-list{
    display:flex;
    flex-direction:column;
    gap: 10px;
}

.system-log-item{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 16px;
    background: rgba(0,0,0,0.12);
    border: 1px solid rgba(255,255,255,0.08);
}

.system-log-title{
    font-size: 13px;
    font-weight: 650;
}

.system-log-time{
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

.system-log-exp{
    font-size: 13px;
    font-weight: 800;
    color: rgba(48,209,88,0.95);
}

.system-log-empty{
    font-size: 12px;
    color: var(--color-text-secondary);
    padding: 10px 0;
}


/* =========================
   Premium System Screen v2
   ========================= */
#system-view { padding: 14px 14px 90px; }

.sys { display: flex; flex-direction: column; gap: 12px; }
.sys-top { display:flex; align-items:center; justify-content:space-between; gap:10px; }

.sys-seg { display:flex; background: rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.08); border-radius: 14px; padding: 3px; overflow:hidden; }
.sys-seg-btn { border:0; background:transparent; color: rgba(245,245,247,0.78); padding: 9px 12px; border-radius: 11px; font-weight: 700; letter-spacing: -0.01em; }
.sys-seg-btn.is-active { background: rgba(255,255,255,0.12); color: rgba(245,245,247,0.96); box-shadow: 0 10px 24px rgba(0,0,0,0.25); }

.sys-goal-btn { display:flex; align-items:center; gap:8px; border-radius: 14px; padding: 10px 12px; }
.gp-ico { width: 18px; height: 18px; display:inline-flex; align-items:center; justify-content:center; }
.gp-ico svg { width: 18px; height: 18px; }

.sys-hero { padding: 16px; }
.sys-hero-main { display:flex; align-items:baseline; justify-content:space-between; gap:10px; }
.sys-hero-value { font-size: 44px; line-height: 1; font-weight: 800; letter-spacing: -0.03em; }
.sys-hero-sub { margin-top: 6px; color: rgba(245,245,247,0.65); font-weight: 600; }

.sys-range { margin-top: 14px; }
.sys-range-labels { display:flex; justify-content:space-between; font-size: 12px; color: rgba(245,245,247,0.55); }
.sys-range-bar { position:relative; height: 18px; margin-top: 8px; }
.sys-range-track { position:absolute; inset: 7px 0 7px 0; border-radius: 999px; background: rgba(255,255,255,0.08); border:1px solid rgba(255,255,255,0.08); }
.sys-range-dot { position:absolute; top: 2px; transform: translateX(-50%); width: 14px; height: 14px; border-radius: 999px; background: rgba(245,245,247,0.92); box-shadow: 0 10px 24px rgba(0,0,0,0.35); }
.sys-range-hint { margin-top: 8px; font-size: 13px; color: rgba(245,245,247,0.70); font-weight: 650; }

.sys-mini { display:grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.sys-mini-card { padding: 12px; border-radius: 16px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); }
.sys-mini-k { font-size: 12px; color: rgba(245,245,247,0.60); font-weight: 700; }
.sys-mini-v { font-size: 22px; font-weight: 800; margin-top: 4px; letter-spacing:-0.02em; }
.sys-mini-s { font-size: 12px; color: rgba(245,245,247,0.55); margin-top: 2px; font-weight: 650; }

.sys-section-title { font-size: 13px; color: rgba(245,245,247,0.70); font-weight: 800; margin-bottom: 10px; letter-spacing:-0.01em; }

.sys-mainquest, .sys-quests, .sys-log { padding: 14px; }
.sys-empty { color: rgba(245,245,247,0.60); font-weight: 650; padding: 8px 2px; }

.sys-quest-list { display:flex; flex-direction:column; gap: 10px; }
.sys-quest { padding: 12px; border-radius: 16px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); }
.sys-quest.is-main { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.12); }
.sys-quest-title { font-weight: 800; letter-spacing:-0.01em; }
.sys-quest-bar { height: 10px; background: rgba(255,255,255,0.07); border-radius: 999px; overflow:hidden; margin-top: 10px; border:1px solid rgba(255,255,255,0.08); }
.sys-quest-bar-fill { height:100%; width:0; background: rgba(245,245,247,0.92); border-radius: 999px; }
.sys-quest-meta { display:flex; align-items:center; justify-content:space-between; gap: 10px; margin-top: 10px; }
.sys-quest-progress { font-size: 12px; color: rgba(245,245,247,0.60); font-weight: 700; }

.sys-footer { display:grid; grid-template-columns: 1fr 120px; gap: 10px; align-items:stretch; }
.sys-exp { padding: 12px; border-radius: 16px; background: rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.08); }
.sys-exp-top { display:flex; align-items:baseline; justify-content:space-between; }
.sys-exp-k { font-size: 12px; color: rgba(245,245,247,0.60); font-weight: 800; }
.sys-exp-v { font-size: 12px; color: rgba(245,245,247,0.80); font-weight: 800; }
.sys-exp-bar { height: 10px; border-radius: 999px; background: rgba(255,255,255,0.07); border:1px solid rgba(255,255,255,0.08); overflow:hidden; margin-top: 8px; }
.sys-exp-fill { height:100%; background: rgba(245,245,247,0.92); width:0; border-radius: 999px; }
.sys-exp-hint { margin-top: 8px; font-size: 12px; color: rgba(245,245,247,0.55); font-weight: 650; }

.sys-streak { padding: 12px; border-radius: 16px; background: rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.08); display:flex; flex-direction:column; justify-content:center; }
.sys-streak-k { font-size: 12px; color: rgba(245,245,247,0.60); font-weight: 800; }
.sys-streak-v { font-size: 18px; font-weight: 900; margin-top: 4px; }

.sys-log-list { display:flex; flex-direction:column; gap: 8px; }
.sys-log-item { padding: 10px 12px; border-radius: 14px; background: rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.08); display:flex; justify-content:space-between; gap: 10px; }
.sys-log-title { color: rgba(245,245,247,0.86); font-weight: 750; font-size: 13px; }
.sys-log-meta { color: rgba(245,245,247,0.55); font-weight: 650; font-size: 12px; text-align:right; }

/* Bottom sheet */
.sys-sheet { position:fixed; inset:0; z-index: 9999; display:flex; align-items:flex-end; }
.sys-sheet-backdrop { position:absolute; inset:0; background: rgba(0,0,0,0.55); backdrop-filter: blur(8px); }
.sys-sheet-panel { position:relative; width:100%; border-top-left-radius: 22px; border-top-right-radius: 22px; background: rgba(25,25,27,0.92); border:1px solid rgba(255,255,255,0.10); box-shadow: 0 -20px 60px rgba(0,0,0,0.55); padding: 14px; }
.sys-sheet-head { display:flex; align-items:center; justify-content:space-between; gap: 10px; }
.sys-sheet-title { font-weight: 900; letter-spacing:-0.02em; }
.sys-sheet-body { margin-top: 12px; display:flex; flex-direction:column; gap: 10px; padding-bottom: 10px; }
.sys-goal-option { width:100%; text-align:left; padding: 12px; border-radius: 16px; background: rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.10); color: rgba(245,245,247,0.92); }
.sys-goal-name { font-weight: 900; letter-spacing:-0.01em; }
.sys-goal-desc { margin-top: 2px; font-size: 12px; color: rgba(245,245,247,0.60); font-weight: 650; }



/* --- System: Result / Discipline tabs --- */
.system-metrics-tabs{
    display:flex;
    gap:8px;
    padding:10px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    margin-bottom: 12px;
}
.system-tab{
    flex:1;
    appearance:none;
    border:0;
    padding:10px 12px;
    border-radius: 12px;
    background: transparent;
    color: rgba(245,245,247,0.78);
    font-weight: 600;
    letter-spacing: .2px;
    cursor:pointer;
}
.system-tab.active{
    background: rgba(255,255,255,0.10);
    color: rgba(245,245,247,0.96);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.10);
}
.system-metric-panel{ display:none; }
.system-metric-panel.active{ display:block; }

.system-metric-number{
    font-size: 44px;
    line-height: 1;
    font-weight: 800;
    letter-spacing: -0.8px;
    margin: 4px 0 8px;
}
.system-metric-label{
    color: rgba(245,245,247,0.70);
    font-size: 13px;
    margin-bottom: 12px;
}

/* forecast range */
.system-forecast{
    margin-top: 10px;
    padding: 12px;
    border-radius: 14px;
    background: rgba(0,0,0,0.18);
    border: 1px solid rgba(255,255,255,0.08);
}
.system-forecast-row{
    display:flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 10px;
}
.system-forecast-title{
    font-size: 13px;
    color: rgba(245,245,247,0.70);
}
.system-forecast-value{
    font-size: 16px;
    font-weight: 700;
    color: rgba(245,245,247,0.96);
}
.system-forecast-track{
    position: relative;
    height: 10px;
    border-radius: 999px;
    background: rgba(255,255,255,0.10);
    overflow:hidden;
}
.system-forecast-dot{
    position:absolute;
    top: 50%;
    width: 12px;
    height: 12px;
    transform: translate(-50%,-50%);
    border-radius: 999px;
    background: rgba(0,122,255,0.95);
    box-shadow: 0 6px 18px rgba(0,122,255,0.35);
}
.system-forecast-minmax{
    display:flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 11px;
    color: rgba(245,245,247,0.55);
}
.system-forecast-hint{
    margin-top: 8px;
    font-size: 12px;
    color: rgba(245,245,247,0.70);
}

/* debt card */
.system-debt{
    margin-top: 10px;
    padding: 12px;
    border-radius: 14px;
    background: rgba(255,149,0,0.10);
    border: 1px solid rgba(255,149,0,0.25);
}
.system-debt-row{
    display:flex;
    justify-content: space-between;
    align-items: baseline;
}
.system-debt-title{
    font-size: 13px;
    color: rgba(245,245,247,0.75);
}
.system-debt-value{
    font-size: 18px;
    font-weight: 800;
}
.system-debt-hint{
    margin-top: 6px;
    font-size: 12px;
    color: rgba(245,245,247,0.70);
}

/* rank colors */
.system-rank[data-rank="E"]{ color:#8E8E93; }
.system-rank[data-rank="D"]{ color:#A2845E; }
.system-rank[data-rank="C"]{ color:#34C759; }
.system-rank[data-rank="B"]{ color:#0A84FF; }
.system-rank[data-rank="A"]{ color:#BF5AF2; }
.system-rank[data-rank="S"]{ color:#FFD60A; text-shadow: 0 10px 30px rgba(255,214,10,0.25); }

/* toast tones (uses undo-toast container) */
.undo-toast.toast--info .toast-glass{ box-shadow: 0 18px 60px rgba(10,132,255,0.16); }
.undo-toast.toast--success .toast-glass{ box-shadow: 0 18px 60px rgba(52,199,89,0.18); }
.undo-toast.toast--warning .toast-glass{ box-shadow: 0 18px 60px rgba(255,159,10,0.18); }
.undo-toast.toast--danger .toast-glass{ box-shadow: 0 18px 60px rgba(255,69,58,0.18); }




/* =========================
   Auth (Telegram Login) UI
   ========================= */
.gp-auth-btn { position: relative; }

.gp-auth-btn.gp-auth-btn--authed i { display: none; }

.gp-auth-btn .gp-auth-avatar-mini {
  width: 22px;
  height: 22px;
  border-radius: 999px;
  overflow: hidden;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  background: rgba(245,245,247,.10);
  border: 1px solid rgba(245,245,247,.14);
}

.gp-auth-btn .gp-auth-avatar-mini img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.auth-stack { display: grid; gap: 14px; }

.auth-card {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 10px 30px rgba(0,0,0,0.20);
}

.auth-card-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.auth-card-subtitle { font-size: 12px; opacity: .78; margin-bottom: 12px; }

.auth-widget-wrap { display: grid; place-items: center; padding: 10px 0 6px; }

.auth-card-hint { font-size: 11px; opacity: .6; margin-top: 10px; line-height: 1.35; }

.auth-user-row { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }

.auth-avatar {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  overflow: hidden;
  background: rgba(245,245,247,.10);
  border: 1px solid rgba(245,245,247,.14);
  display: grid;
  place-items: center;
  font-weight: 800;
}

.auth-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }

.auth-user-name { font-size: 14px; font-weight: 800; letter-spacing: -0.02em; }

.auth-user-tag { font-size: 12px; opacity: .75; margin-top: 2px; }

.auth-actions { display: grid; gap: 10px; }

.auth-promo {
  padding: 12px;
  border-radius: 14px;
  background: rgba(0,122,255,0.10);
  border: 1px solid rgba(0,122,255,0.24);
  margin: 10px 0 14px;
}

.auth-promo-title { font-size: 13px; font-weight: 800; margin-bottom: 2px; }

.auth-promo-subtitle { font-size: 11px; opacity: .75; line-height: 1.35; }