:root {
    --bg-color: #0b0914;
    --card-bg: rgba(24, 18, 38, 0.65);
    --card-border: rgba(168, 85, 247, 0.2);
    --accent-purple: #8b5cf6;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --badge-today: #10b981;
    --badge-tomorrow: #f59e0b;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Глубокие фоновые переливы жидкого стекла */
.glow { position: fixed; border-radius: 50%; filter: blur(160px); z-index: -1; pointer-events: none; }
.glow-1 { width: 500px; height: 500px; background: rgba(124, 58, 237, 0.22); top: -120px; left: 15%; }
.glow-2 { width: 600px; height: 600px; background: rgba(59, 130, 246, 0.12); bottom: -120px; right: 10%; }

/* Шапка с эффектом жидкого стекла */
.top-nav {
    display: flex; justify-content: space-between; align-items: center; padding: 16px 32px;
    background: rgba(18, 14, 30, 0.75); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(168, 85, 247, 0.25);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: sticky; top: 0; z-index: 100;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo-emblem { 
    font-size: 24px; background: rgba(139, 92, 246, 0.2); padding: 8px; border-radius: 12px;
    border: 1px solid rgba(168, 85, 247, 0.3); box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.1);
}
.school-title { font-weight: 700; font-size: 16px; color: #fff; letter-spacing: 0.5px; }
.school-subtitle { font-size: 11px; color: var(--text-secondary); display: block; }

.nav-links { display: flex; gap: 10px; }
.nav-links a, .class-btn, .day-card, .cookie-btn, .submit-btn, .delete-btn, .download-file-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(168, 85, 247, 0.2);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a { 
    color: var(--text-secondary); text-decoration: none; padding: 8px 18px; border-radius: 14px; font-size: 14px;
}

/* Ультра-жидкое стекло при наведении и для активных элементов */
.nav-links a.active, .nav-links a:hover,
.day-card:hover, .day-card.active,
.class-btn:hover, .class-btn.active,
.cookie-btn:hover, .submit-btn:hover, .delete-btn:hover, .download-file-btn:hover {
    background: rgba(139, 92, 246, 0.28);
    border-color: rgba(192, 132, 252, 0.6);
    box-shadow: 0 0 25px rgba(139, 92, 246, 0.45), inset 0 0 15px rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: #fff;
    transform: translateY(-2px);
}

.main-layout { display: grid; grid-template-columns: 260px 1fr; gap: 24px; max-width: 1400px; margin: 24px auto; padding: 0 24px; }

/* Все контейнеры в стиле жидкого стекла */
.sidebar-glass, .glass-section, .lesson-glass-card, .homework-glass-box {
    background: var(--card-bg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    box-shadow: 0 10px 40px 0 rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.sidebar-glass { padding: 20px; height: fit-content; }
.sidebar-header h3 { font-size: 12px; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 16px; }
.days-list { display: flex; flex-direction: column; gap: 10px; }
.day-card { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-radius: 14px; color: var(--text-primary); text-decoration: none; font-size: 14px; }
.badge { font-size: 10px; padding: 3px 8px; border-radius: 8px; font-weight: 600; text-transform: uppercase; }
.badge-today { background: rgba(16, 185, 129, 0.2); border: 1px solid rgba(16, 185, 129, 0.4); color: #34d399; }
.badge-tomorrow { background: rgba(245, 158, 11, 0.2); border: 1px solid rgba(245, 158, 11, 0.4); color: #fbbf24; }

.custom-date-picker { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--card-border); }
.custom-date-picker label { font-size: 12px; color: var(--text-secondary); display: block; margin-bottom: 8px; }
.custom-date-picker input { width: 100%; padding: 10px 12px; background: rgba(0,0,0,0.35); border: 1px solid var(--card-border); border-radius: 12px; color: #fff; outline: none; backdrop-filter: blur(10px); }

.glass-section { padding: 24px; margin-bottom: 24px; }
.section-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; gap: 10px; flex-wrap: wrap; }
.section-title h2 { font-size: 18px; font-weight: 600; }
.current-selected, .schedule-date { font-size: 14px; color: var(--text-secondary); }

.classes-grid { display: flex; flex-direction: column; gap: 14px; }
.grade-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.grade-label { min-width: 70px; font-size: 13px; color: #c4b5fd; font-weight: 600; }
.buttons-group { display: flex; flex-wrap: wrap; gap: 8px; }
.class-btn { padding: 8px 14px; border-radius: 12px; color: var(--text-primary); text-decoration: none; font-size: 13px; }
.class-btn.active { background: rgba(139, 92, 246, 0.35); border-color: rgba(192, 132, 252, 0.7); box-shadow: 0 0 20px rgba(139, 92, 246, 0.4); }

.lessons-container { display: flex; flex-direction: column; gap: 16px; }
.lesson-glass-card { display: flex; gap: 20px; padding: 18px; }
.lesson-time-badge { background: rgba(139, 92, 246, 0.18); color: #c4b5fd; border: 1px solid rgba(139, 92, 246, 0.35); padding: 8px 12px; border-radius: 12px; font-weight: 700; font-size: 14px; height: fit-content; backdrop-filter: blur(8px); }
.lesson-details { flex: 1; }
.lesson-name { font-size: 16px; font-weight: 600; color: #fff; }
.lesson-subinfo { margin-top: 6px; font-size: 13px; color: var(--text-secondary); display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.homework-glass-box { margin-top: 14px; padding: 14px 16px; background: rgba(16, 185, 129, 0.08); border-color: rgba(16, 185, 129, 0.3); }
.hw-title { color: #34d399; font-size: 13px; margin-bottom: 4px; }
.hw-content { font-size: 14px; color: var(--text-primary); line-height: 1.4; }
.hw-file-action { margin-top: 10px; }
.download-file-btn { display: inline-block; padding: 6px 14px; border-radius: 10px; color: #34d399; font-size: 13px; text-decoration: none; }

.empty-schedule-card { text-align: center; padding: 40px; color: var(--text-muted); }
.empty-icon { font-size: 40px; display: block; margin-bottom: 8px; }

/* Cookie banner */
.cookie-banner {
    position: fixed; bottom: -100px; left: 50%; transform: translateX(-50%);
    background: rgba(22, 16, 38, 0.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    color: var(--text-primary); padding: 16px 24px; border-radius: 16px;
    display: flex; align-items: center; gap: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6); z-index: 1000;
    transition: bottom 0.4s ease-in-out; border: 1px solid rgba(168, 85, 247, 0.3);
    max-width: 550px; width: 90%;
}
.cookie-banner.show { bottom: 24px; }
.cookie-text { font-size: 13px; color: var(--text-secondary); }
.cookie-text a { color: #c4b5fd; text-decoration: underline; font-weight: 600; }
.cookie-btn { padding: 8px 16px; border-radius: 12px; font-weight: 600; cursor: pointer; color: #fff; background: rgba(139, 92, 246, 0.3); border: 1px solid rgba(192, 132, 252, 0.5); }

/* Admin panel */
.admin-container { max-width: 1000px; margin: 40px auto; padding: 0 20px; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.back-link { color: #c4b5fd; text-decoration: none; font-size: 14px; }
.admin-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.form-group label { display: block; font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; }
.form-group input, .form-group textarea { width: 100%; padding: 10px; background: rgba(0,0,0,0.4); border: 1px solid var(--card-border); border-radius: 12px; color: #fff; outline: none; backdrop-filter: blur(10px); }
.file-input { padding: 6px; color: var(--text-secondary); }
.submit-btn { background: rgba(139, 92, 246, 0.3); color: #fff; padding: 12px; border-radius: 12px; font-weight: 600; cursor: pointer; }
.table-wrapper { overflow-x: auto; }
.glass-table { width: 100%; border-collapse: collapse; margin-top: 16px; min-width: 600px; }
.glass-table th, .glass-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--card-border); font-size: 14px; }
.glass-table th { color: var(--text-secondary); }
.table-file-link { color: #34d399; text-decoration: none; font-size: 13px; }
.delete-btn { background: rgba(239, 68, 68, 0.2); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.4); padding: 6px 12px; border-radius: 10px; cursor: pointer; }

/* Мобильная адаптивность */
@media (max-width: 900px) {
    .main-layout { grid-template-columns: 1fr; padding: 0 12px; }
    .top-nav { padding: 12px 16px; }
    .form-row { grid-template-columns: 1fr; }
    .grade-row { flex-direction: column; align-items: flex-start; gap: 8px; }
    .lesson-glass-card { flex-direction: column; gap: 12px; }
    .admin-header { flex-direction: column; align-items: flex-start; gap: 10px; }
}