:root {
            --primary: #1a4b8c;
            --primary-light: #5a8ce6;
            --primary-dark: #0d3264;
            --secondary: #ffb400;
            --accent: #ff6b6b;
            --light: #f9fafb;
            --dark: #1f2937;
            --gray: #6b7280;
            --light-gray: #e5e7eb;
            --white: #ffffff;
            --radius: 12px;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.08);
            --shadow: 0 8px 24px rgba(0,0,0,0.1);
            --transition: all 0.22s ease;
        }

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

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            background: var(--light);
            color: var(--dark);
            line-height: 1.55;
        }

        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 16px;
        }

        .page-header {
            text-align: center;
            padding: 2.5rem 0 1.2rem;
        }

        .page-header h1 {
            font-size: clamp(2rem, 6vw, 2.8rem);
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 0.5rem;
        }

        .page-header h1 span { color: var(--secondary); }

        .page-header p {
            color: var(--gray);
            font-size: 1.1rem;
        }

        /* Вибір класу — пігулки з номерами */
        .class-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin: 1.5rem 0 2.5rem;
        }

        .class-tab {
            padding: 0.7rem 1.4rem;
            background: #f1f5f9;
            color: var(--dark);
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: 999px;
            cursor: pointer;
            text-decoration: none;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .class-tab:hover {
            background: var(--primary-light);
            color: white;
            transform: translateY(-2px);
        }

        .class-tab.active {
            background: var(--secondary);
            color: var(--dark);
            border-color: var(--secondary);
            box-shadow: 0 0 0 4px rgba(255,180,0,0.2);
        }

        /* Картки днів */
        .schedule-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 1.5rem;
            margin-bottom: 3rem;
        }

        .day-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .day-card.today {
            box-shadow: 0 0 0 3px var(--secondary), var(--shadow);
            transform: translateY(-4px);
        }

        .day-header {
            background: var(--primary);
            color: white;
            padding: 1rem 1.2rem;
            font-size: 1.25rem;
            font-weight: 700;
            text-align: center;
        }

        .day-card.today .day-header {
            background: var(--secondary);
            color: var(--dark);
        }

        .lessons-list {
            padding: 1rem 1.2rem;
        }

        .lesson-item {
            display: flex;
            align-items: center;
            padding: 0.9rem 0;
            border-bottom: 1px solid var(--light-gray);
        }

        .lesson-item:last-child {
            border-bottom: none;
        }

        .time-circle {
            width: 54px;
            height: 54px;
            flex-shrink: 0;
            background: #eff6ff;
            border-radius: 50%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary-dark);
            border: 2px solid var(--primary-light);
            text-align: center;
        }

        .lesson-content {
            flex: 1;
        }

        .lesson-subject {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--dark);
            margin-bottom: 0.25rem;
        }

        .no-lesson {
            text-align: center;
            color: var(--gray);
            font-style: italic;
            padding: 2rem 0;
        }

        /* Мобільна адаптація */
        @media (max-width: 900px) {
            .schedule-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .class-tab {
                padding: 0.6rem 1.1rem;
                font-size: 0.98rem;
            }

            .time-circle {
                width: 48px;
                height: 48px;
                font-size: 0.85rem;
            }

            .lesson-subject {
                font-size: 1rem;
            }
        }