/* ========================================================
   ОБЩАЯ ДИЗАЙН-СИСТЕМА (SAAS CORE)
   ======================================================== */

:root {
    --bg-gradient-start: #0b0e14;
    --bg-gradient-mid: #0a0c10;
    --bg-gradient-end: #030405;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-accent: #b2d0ff;
    --glass-bg: rgba(18, 22, 30, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(20, 30, 45, 0.5);
    --card-hover-bg: rgba(35, 50, 75, 0.7);
    --stat-card-bg: rgba(20, 30, 48, 0.5);
    --modal-bg: rgba(20, 25, 35, 0.95);
    --table-header-bg: rgba(255,255,255,0.05);
    --table-row-hover: rgba(40, 70, 120, 0.2);
}

body.light-theme {
    --bg-gradient-start: #f0f4fa;
    --bg-gradient-mid: #e6ecf5;
    --bg-gradient-end: #d9e2ef;
    --text-primary: #1a1e2b;
    --text-secondary: rgba(30, 40, 60, 0.8);
    --text-accent: #1a4a9e;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(0, 0, 0, 0.08);
    --card-bg: rgba(255, 255, 255, 0.6);
    --card-hover-bg: rgba(255, 255, 255, 0.85);
    --stat-card-bg: rgba(255, 255, 255, 0.7);
    --modal-bg: rgba(255, 255, 255, 0.95);
    --table-header-bg: rgba(0,0,0,0.03);
    --table-row-hover: rgba(200, 220, 250, 0.4);
}

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

body {
    background: radial-gradient(circle at 10% 20%, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 40%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    font-family: "Inter", sans-serif;
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* Лейаут с левым сайдбаром */
.app-layout {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 10;
}

.sidebar-left {
    width: 280px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    border-right: 1px solid rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    padding: 1.8rem 1.2rem;
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 100;
    flex-shrink: 0;
    overflow-y: auto;
}

body:not(.light-theme) .sidebar-left {
    background: rgba(18, 22, 30, 0.85);
    border-right-color: var(--glass-border);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 0.5rem 1.8rem 0.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    margin-bottom: 1.2rem;
}

body:not(.light-theme) .sidebar-brand {
    border-bottom-color: var(--glass-border);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex: 1;
}

.sidebar-nav .nav-tab {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    border: none;
    background: transparent;
    color: #475569;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
}

body:not(.light-theme) .sidebar-nav .nav-tab { color: var(--text-secondary); }
.sidebar-nav .nav-tab i { font-size: 1.1rem; width: 22px; text-align: center; color: #3b82f6; }
body:not(.light-theme) .sidebar-nav .nav-tab i { color: #60a5fa; }

.sidebar-nav .nav-tab:hover {
    background: #f1f5f9;
    color: #2563eb;
    transform: translateX(4px);
}
body:not(.light-theme) .sidebar-nav .nav-tab:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #93c5fd;
}

.sidebar-nav .nav-tab.active {
    background: #eff6ff;
    color: #2563eb;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}
body:not(.light-theme) .sidebar-nav .nav-tab.active {
    background: rgba(37, 99, 235, 0.2);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Рабочая зона */
.main-workspace {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.workspace-topbar {
    padding: 1.2rem 2.5rem;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1.2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 90;
}
body:not(.light-theme) .workspace-topbar {
    background: rgba(18, 22, 30, 0.4);
    border-bottom-color: var(--glass-border);
}

.workspace-content {
    padding: 1.8rem 2.2rem 3.5rem 2.2rem;
    flex: 1;
    min-width: 0;
}

.tab-content { display: none; width: 100%; animation: fadeIn 0.2s ease-in-out; }
.tab-content.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* Шапка профиля и переключатели */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 60px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.2rem;
}
.user-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 60px;
    padding: 0.4rem 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.9rem;
}
.user-avatar {
    width: 38px;
    height: 38px;
    background: linear-gradient(145deg, #3b82f6, #1d4ed8);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}
.logout-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
}
.logout-btn:hover { color: #ef4444; }

/* Баннеры и карточки метрик */
.saas-hero-banner {
    background: linear-gradient(135deg, #eaf2fd 0%, #dbeafe 50%, #eff6ff 100%);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: 1.8rem;
    padding: 2rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}
body:not(.light-theme) .saas-hero-banner {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.35) 0%, rgba(30, 41, 59, 0.6) 100%);
    border-color: rgba(255, 255, 255, 0.08);
}
.saas-hero-title { font-size: 1.85rem; font-weight: 800; color: #0f172a; margin-bottom: 0.5rem; }
body:not(.light-theme) .saas-hero-title { color: #ffffff; }
.saas-hero-desc { font-size: 0.95rem; color: #475569; }
body:not(.light-theme) .saas-hero-desc { color: rgba(255, 255, 255, 0.75); }
.saas-hero-art { font-size: 6rem; color: #3b82f6; opacity: 0.85; }

.saas-stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.saas-stat-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 1.5rem;
    padding: 1.3rem 1.4rem;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.04);
}
body:not(.light-theme) .saas-stat-card {
    background: var(--stat-card-bg);
    border-color: var(--glass-border);
}
.saas-stat-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.8rem; }
.saas-stat-icon {
    width: 40px; height: 40px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
}
.saas-stat-icon.blue { background: #eff6ff; color: #2563eb; }
.saas-stat-icon.green { background: #f0fdf4; color: #16a34a; }
.saas-stat-icon.orange { background: #fff7ed; color: #ea580c; }
.saas-stat-icon.purple { background: #faf5ff; color: #9333ea; }
body:not(.light-theme) .saas-stat-icon.blue { background: rgba(37,99,235,0.2); color: #60a5fa; }
body:not(.light-theme) .saas-stat-icon.green { background: rgba(22,163,74,0.2); color: #4ade80; }
body:not(.light-theme) .saas-stat-icon.orange { background: rgba(234,88,12,0.2); color: #fb923c; }
body:not(.light-theme) .saas-stat-icon.purple { background: rgba(147,51,234,0.2); color: #c084fc; }

.saas-stat-value { font-size: 2rem; font-weight: 800; color: #0f172a; margin-bottom: 0.2rem; }
body:not(.light-theme) .saas-stat-value { color: #ffffff; }
.saas-stat-label { font-size: 0.8rem; font-weight: 600; color: #64748b; }
body:not(.light-theme) .saas-stat-label { color: rgba(255, 255, 255, 0.7); }

/* Контейнеры и таблицы */
.saas-plan-container {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 1.8rem;
    padding: 1.8rem;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.04);
}
body:not(.light-theme) .saas-plan-container {
    background: var(--stat-card-bg);
    border-color: var(--glass-border);
}
.saas-table-wrapper { overflow-x: auto; border-radius: 1.2rem; }
.saas-plan-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; min-width: 700px; }
.saas-plan-table th {
    background: #f8fafc; color: #475569; font-weight: 600; padding: 0.9rem 1rem;
    text-align: left; border-bottom: 1px solid #e2e8f0; font-size: 0.8rem; text-transform: uppercase;
}
body:not(.light-theme) .saas-plan-table th {
    background: rgba(255, 255, 255, 0.04); color: var(--text-accent); border-bottom-color: var(--glass-border);
}
.saas-plan-table td { padding: 1rem; border-bottom: 1px solid #f1f5f9; vertical-align: middle; }
body:not(.light-theme) .saas-plan-table td { border-bottom-color: rgba(255, 255, 255, 0.05); }

/* Статусные таблетки */
.status-pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; }
.status-pill.confirmed { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }
.status-pill.pending { background: #fffbeb; color: #d97706; border: 1px solid #fde68a; }
body:not(.light-theme) .status-pill.confirmed { background: rgba(34,197,94,0.15); color: #4ade80; border-color: rgba(34,197,94,0.3); }
body:not(.light-theme) .status-pill.pending { background: rgba(245,158,11,0.15); color: #fbbf24; border-color: rgba(245,158,11,0.3); }

/* Скроллбары */
html::-webkit-scrollbar, body::-webkit-scrollbar, ::-webkit-scrollbar { width: 9px; height: 9px; }
html::-webkit-scrollbar-track, body::-webkit-scrollbar-track { background: transparent; }
html::-webkit-scrollbar-thumb, body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.22); border-radius: 10px; border: 2px solid transparent; background-clip: padding-box;
}
html:has(body.light-theme)::-webkit-scrollbar-thumb, body.light-theme::-webkit-scrollbar-thumb {
    background: rgba(30, 41, 59, 0.35); border: 2px solid transparent; background-clip: padding-box;
}


/* ========================================================
   СТИЛИ ПРОФИЛЯ И БЕЗОПАСНОСТИ
   ======================================================== */
.profile-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .profile-grid {
        grid-template-columns: 1fr;
    }
}

.profile-field-group {
    margin-bottom: 1.2rem;
}

.profile-field-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #64748b;
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

body:not(.light-theme) .profile-field-label {
    color: #94a3b8;
}

.profile-field-value {
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 1rem;
    padding: 0.8rem 1.1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

body:not(.light-theme) .profile-field-value {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--glass-border);
}

.profile-input {
    width: 100%;
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 1rem;
    padding: 0.8rem 1.1rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

body:not(.light-theme) .profile-input {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--glass-border);
}

.profile-input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.saas-badge-pay {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #ffffff;
    border: none;
    padding: 0.8rem 1.6rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.saas-badge-pay:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(37, 99, 235, 0.35);
}


/* Кнопки */
        .btn-sm, .btn-primary, .btn-success, .btn-danger, .btn-secondary, .add-lesson-btn {
            padding: 0.5rem 1.2rem; border-radius: 40px; border: none; font-weight: 600; cursor: pointer;
            background: var(--card-bg); color: var(--text-primary); border: 1px solid var(--glass-border);
            transition: 0.2s;
        }
        .btn-primary, .btn-success { background: var(--btn-primary-bg); color: white; }
        .btn-danger { background: #c0392b; color: white; }
        .btn-secondary { background: var(--card-bg); }
        .add-lesson-btn { background: var(--btn-primary-bg); color: white; padding: 0.8rem 1.8rem; }

        /* Модальные окна */
        .modal {
            display: none; position: fixed; top:0; left:0; width:100%; height:100%;
            background: rgba(0,0,0,0.5); align-items: center; justify-content: center; z-index: 1000;
        }
        .modal-card {
            background: var(--modal-bg); backdrop-filter: blur(20px); border: 1px solid var(--glass-border);
            border-radius: 2.5rem; padding: 2rem; max-width: 500px; width: 90%;
        }
        .form-group { margin-bottom: 1.2rem; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .form-group input, .form-group select, .form-group textarea {
            width: 100%; padding: 0.8rem 1rem; border-radius: 40px; border: 1px solid var(--input-border);
            background: var(--input-bg); color: var(--text-primary); outline: none;
        }
        .modal-actions { display: flex; justify-content: flex-end; gap: 1rem; margin-top: 1.5rem; }

        footer { text-align: center; padding: 2rem; color: var(--text-secondary); }

        /* ========================================================
   КНОПКИ ДЕЙСТВИЙ И КАРТОЧКА ИНФО (SAAS СТИЛЬ)
   ======================================================== */

/* Инфо-карточка внизу сайдбара */
.sidebar-bottom-card {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: 1.2rem;
    padding: 1.1rem;
    margin-top: auto;
}

body:not(.light-theme) .sidebar-bottom-card {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.25), rgba(30, 41, 59, 0.5));
    border-color: rgba(59, 130, 246, 0.2);
}

.sidebar-bottom-card h5 {
    font-size: 0.85rem;
    font-weight: 700;
    color: #1e3a8a;
    margin-bottom: 0.3rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

body:not(.light-theme) .sidebar-bottom-card h5 {
    color: #93c5fd;
}

.sidebar-bottom-card p {
    font-size: 0.75rem;
    color: #475569;
    line-height: 1.4;
    margin: 0;
}

body:not(.light-theme) .sidebar-bottom-card p {
    color: rgba(255, 255, 255, 0.7);
}

/* Базовый стиль всех кнопок действий */
.action-btn {
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: #f1f5f9;
    color: #334155;
    padding: 0.55rem 1.15rem;
    border-radius: 30px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    text-decoration: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

body:not(.light-theme) .action-btn {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--glass-border);
    color: #e2e8f0;
}

.action-btn:hover {
    background: #e2e8f0;
    color: #0f172a;
    transform: translateY(-1px);
}

body:not(.light-theme) .action-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
}

/* Цветовые модификаторы кнопок */
.action-btn.btn-blue {
    background: #2563eb !important;
    color: #ffffff !important;
    border-color: #2563eb !important;
    box-shadow: 0 3px 10px rgba(37, 99, 235, 0.25);
}
.action-btn.btn-blue:hover {
    background: #1d4ed8 !important;
}

.action-btn.btn-green {
    background: #16a34a !important;
    color: #ffffff !important;
    border-color: #16a34a !important;
    box-shadow: 0 3px 10px rgba(22, 163, 74, 0.25);
}
.action-btn.btn-green:hover {
    background: #15803d !important;
}

.action-btn.btn-purple {
    background: #9333ea !important;
    color: #ffffff !important;
    border-color: #9333ea !important;
    box-shadow: 0 3px 10px rgba(147, 51, 234, 0.25);
}
.action-btn.btn-purple:hover {
    background: #7e22ce !important;
}

.action-btn.btn-red {
    background: #ef4444 !important;
    color: #ffffff !important;
    border-color: #ef4444 !important;
    box-shadow: 0 3px 10px rgba(239, 68, 68, 0.25);
}
.action-btn.btn-red:hover {
    background: #dc2626 !important;
}

/* Иконки-действия и бейджи в таблице плана */
.icon-btn {
    border: none;
    background: transparent;
    padding: 5px 8px;
    border-radius: 8px;
    cursor: pointer;
    color: #64748b;
    transition: all 0.15s;
}
body:not(.light-theme) .icon-btn { color: #94a3b8; }
.icon-btn:hover { background: rgba(0,0,0,0.05); color: #0f172a; }
body:not(.light-theme) .icon-btn:hover { background: rgba(255,255,255,0.08); color: #fff; }
.icon-btn.danger { color: #ef4444; }
.icon-btn.danger:hover { background: rgba(239,68,68,0.15); color: #dc2626; }

.date-auto-badge { color: #16a34a; font-size: 0.8rem; margin-left: 4px; }
.linked-badge { color: #16a34a; font-size: 0.9rem; }
.unlinked-badge { color: #94a3b8; font-size: 0.65rem; }
.template-badge { color: #2563eb; font-size: 0.8rem; }
.custom-badge { color: #16a34a; font-size: 0.8rem; }

/* ========================================================
   КАСТОМНОЕ МОДАЛЬНОЕ ОКНО ПОДТВЕРЖДЕНИЯ (CONFIRM MODAL)
   ======================================================== */

.confirm-dialog-card {
    max-width: 440px !important;
    text-align: center;
    padding: 2.2rem 2rem !important;
    border-radius: 2rem !important;
}

.confirm-icon-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.7rem;
    margin: 0 auto 1.2rem;
    background: #eff6ff;
    color: #2563eb;
    border: 1px solid #bfdbfe;
}

.confirm-icon-circle.danger {
    background: #fef2f2;
    color: #dc2626;
    border-color: #fecaca;
}

.confirm-icon-circle.warning {
    background: #fffbeb;
    color: #d97706;
    border-color: #fde68a;
}

body:not(.light-theme) .confirm-icon-circle {
    background: rgba(37, 99, 235, 0.15);
    color: #60a5fa;
    border-color: rgba(59, 130, 246, 0.3);
}

body:not(.light-theme) .confirm-icon-circle.danger {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border-color: rgba(239, 68, 68, 0.3);
}

body:not(.light-theme) .confirm-icon-circle.warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border-color: rgba(245, 158, 11, 0.3);
}

.confirm-dialog-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
}

.confirm-dialog-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1.8rem;
    white-space: pre-line;
}

.confirm-dialog-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.confirm-dialog-actions .action-btn {
    min-width: 120px;
    justify-content: center;
    padding: 0.65rem 1.4rem;
    font-size: 0.88rem;
}
/* ========================================================
   ПОДВАЛ FOOTER
   ======================================================== */


        footer {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    padding: 0.9rem 2.5rem;
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

body:not(.light-theme) footer {
    background: rgba(18, 22, 30, 0.4);
    border-top-color: var(--glass-border);
    color: var(--text-secondary);
}

.footer-contacts {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    font-size: 0.82rem;
    transition: all 0.2s ease;
}

.footer-link:hover {
    color: #2563eb;
    transform: translateY(-1px);
}

body:not(.light-theme) .footer-link:hover {
    color: #60a5fa;
}

.footer-link i {
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    footer {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        padding: 1.2rem;
    }
    .footer-contacts {
        justify-content: center;
    }
}

/* ========================================================
   АНАЛИТИКА И СТАТИСТИКА ЕГЭ (SAAS СТИЛЬ)
   ======================================================== */

.stats-grid-two-col {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 1.5rem;
}

@media (max-width: 1100px) {
    .stats-grid-two-col {
        grid-template-columns: 1fr;
    }
}

/* Карточки диаграмм */
.chart-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 1.6rem;
    padding: 1.5rem;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    height: 100%;
    box-sizing: border-box;
}

body:not(.light-theme) .chart-card {
    background: var(--stat-card-bg);
    border-color: var(--glass-border);
}

.chart-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 1.2rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

body:not(.light-theme) .chart-title {
    border-bottom-color: var(--glass-border);
}

/* Столбчатая диаграмма баллов */
.bar-chart-wrapper {
    overflow-x: auto;
    padding-top: 26px; /* отступ сверху, чтобы числа над столбиками не обрезались */
    padding-bottom: 6px;
}

.chart-container {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    min-width: max-content;
}

/* Ось Y */
.chart-y-axis {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 180px;
    font-size: 0.72rem;
    font-weight: 700;
    color: #94a3b8;
    padding-right: 8px;
    text-align: right;
    user-select: none;
    box-sizing: border-box;
}

.chart-content-area {
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* Область графика: нижняя граница точно совпадает с отметкой 0 */
.chart-plot-area {
    height: 180px;
    display: flex;
    align-items: flex-end;
    gap: 1.2rem;
    border-bottom: 2px solid #cbd5e1;
    background-size: 100% 45px;
    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
    box-sizing: border-box;
}

body:not(.light-theme) .chart-plot-area {
    border-bottom-color: rgba(255, 255, 255, 0.2);
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
}

.chart-bar-col {
    width: 58px;
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    height: 100%;
}

.bar {
    width: 36px;
    background: linear-gradient(180deg, #3b82f6, #1d4ed8);
    border-radius: 8px 8px 0 0;
    position: relative;
    transition: height 0.3s ease, filter 0.15s ease;
    cursor: pointer;
}

.bar:hover {
    filter: brightness(1.1);
}

.bar-value {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--text-primary);
}

/* Подписи колонок под осью X */
.chart-labels-row {
    display: flex;
    gap: 1.2rem;
    margin-top: 8px;
}

.chart-label-col {
    width: 58px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.bar-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 58px;
    line-height: 1.2;
}

.bar-sub {
    font-size: 0.68rem;
    color: #64748b;
    margin-top: 3px;
    line-height: 1;
}

body:not(.light-theme) .bar-sub {
    color: #94a3b8;
}

/* Таблица успеваемости по заданиям */
.tasks-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.tasks-table th {
    background: #f8fafc;
    padding: 8px 10px;
    text-align: left;
    font-weight: 700;
    color: #475569;
    border-bottom: 2px solid rgba(0, 0, 0, 0.06);
}

body:not(.light-theme) .tasks-table th {
    background: rgba(255, 255, 255, 0.03);
    color: #94a3b8;
    border-bottom-color: var(--glass-border);
}

.tasks-table td {
    padding: 7px 10px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
}

body:not(.light-theme) .tasks-table td {
    border-bottom-color: rgba(255, 255, 255, 0.03);
}

.chart-progress-track {
    background: #f1f5f9;
    height: 14px;
    border-radius: 10px;
    overflow: hidden;
    width: 100%;
}

body:not(.light-theme) .chart-progress-track {
    background: rgba(255, 255, 255, 0.08);
}

.chart-progress-fill {
    height: 100%;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 5px;
    font-size: 0.65rem;
    font-weight: 700;
    color: #ffffff;
    transition: width 0.3s ease;
}

/* ========================================================
   УДОБНАЯ ИНТЕРАКТИВНАЯ МАТРИЦА ТЕСТОВ (HEATMAP СТИЛЬ)
   ======================================================== */

.matrix-wrapper {
    overflow-x: auto;
    max-height: 650px;
    border-radius: 1.2rem;
    border: 1px solid rgba(0, 0, 0, 0.08);
    position: relative;
}

body:not(.light-theme) .matrix-wrapper {
    border-color: var(--glass-border);
}

.matrix-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.82rem;
}

/* Липкая шапка таблицы */
.matrix-table thead th {
    position: sticky;
    top: 0;
    z-index: 10;
    background: #f1f5f9;
    padding: 10px 8px;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid rgba(0, 0, 0, 0.08);
    white-space: nowrap;
}

body:not(.light-theme) .matrix-table thead th {
    background: #151a24;
    border-bottom-color: var(--glass-border);
}

/* Липкий первый столбец с номерами заданий */
.matrix-table th.task-col,
.matrix-table td.task-cell {
    position: sticky;
    left: 0;
    z-index: 8;
    background: #f8fafc;
    border-right: 2px solid rgba(0, 0, 0, 0.08);
    font-weight: 800;
    text-align: center;
    width: 50px;
    min-width: 50px;
}

body:not(.light-theme) .matrix-table th.task-col,
body:not(.light-theme) .matrix-table td.task-cell {
    background: #111622;
    border-right-color: var(--glass-border);
}

.matrix-table thead th.task-col {
    z-index: 15; /* Пересечение верхней шапки и левой колонки */
}

/* Разделители уровней сложности (1-12, 13-20, 21-27) */
.matrix-group-divider td {
    background: #eff6ff !important;
    color: #1d4ed8 !important;
    font-weight: 800;
    font-size: 0.76rem;
    padding: 6px 12px !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-top: 1px solid #bfdbfe;
    border-bottom: 1px solid #bfdbfe;
}

body:not(.light-theme) .matrix-group-divider td {
    background: rgba(37, 99, 235, 0.12) !important;
    color: #93c5fd !important;
    border-color: rgba(59, 130, 246, 0.25);
}

/* Плитка-кнопка для заданий (клик в один шаг) */
.matrix-tile-btn {
    width: 32px;
    height: 30px;
    border-radius: 8px;
    border: none;
    font-weight: 800;
    font-size: 0.82rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    user-select: none;
    margin: 0 auto;
}

/* Состояния плитки */
.matrix-tile-btn.state-0 {
    background: #f1f5f9;
    color: #94a3b8;
}
body:not(.light-theme) .matrix-tile-btn.state-0 {
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.25);
}
.matrix-tile-btn.state-0:hover {
    background: #e2e8f0;
    color: var(--text-primary);
}

.matrix-tile-btn.state-1 {
    background: #dcfce7;
    color: #15803d;
    box-shadow: 0 2px 6px rgba(22, 163, 74, 0.15);
}
body:not(.light-theme) .matrix-tile-btn.state-1 {
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

/* Для 26 и 27 номеров: 1 балл = оранжевый, 2 балла = ярко-зеленый */
.matrix-tile-btn.state-partial {
    background: #fef3c7;
    color: #b45309;
}
body:not(.light-theme) .matrix-tile-btn.state-partial {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.matrix-tile-btn.state-2 {
    background: #16a34a;
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(22, 163, 74, 0.3);
}

/* Подсветка строки при наведении для удобной ориентации */
.matrix-table tbody tr:hover td {
    background-color: rgba(37, 99, 235, 0.04);
}
body:not(.light-theme) .matrix-table tbody tr:hover td {
    background-color: rgba(255, 255, 255, 0.03);
}

/* Липкий подвал матрицы с непрозрачным фоном */
.matrix-table tfoot {
    position: sticky;
    bottom: 0;
    z-index: 12;
}

.matrix-table tfoot td {
    padding: 9px 6px;
    font-weight: 800;
    text-align: center;
}

/* Строка первичных баллов (ИТОГО) */
.matrix-table tfoot tr.total-row td {
    background: #dbeafe !important;
    color: #1e40af !important;
    border-top: 2px solid #93c5fd;
    border-bottom: 1px solid #bfdbfe;
}

body:not(.light-theme) .matrix-table tfoot tr.total-row td {
    background: #1e293b !important;
    color: #93c5fd !important;
    border-top: 2px solid rgba(59, 130, 246, 0.4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Строка тестовых баллов (БАЛЛ) */
.matrix-table tfoot tr.test-score-row td {
    background: #dcfce7 !important;
    color: #15803d !important;
    border-bottom: none;
}

body:not(.light-theme) .matrix-table tfoot tr.test-score-row td {
    background: #0f291e !important;
    color: #86efac !important;
    border-bottom: none;
}

/* Пересечение левой фиксированной колонки и нижнего подвала */
.matrix-table tfoot td.task-cell {
    position: sticky;
    left: 0;
    z-index: 16;
}


/* Минималистичный чекбокс для заданий 1–25 */
.saas-task-checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 1.5px solid #cbd5e1;
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    position: relative;
    margin: 0;
    flex-shrink: 0;
}

body:not(.light-theme) .saas-task-checkbox {
    border-color: rgba(255, 255, 255, 0.25);
}

.saas-task-checkbox:hover {
    border-color: #16a34a;
}

.saas-task-checkbox:checked {
    background: #16a34a;
    border-color: #16a34a;
}

.saas-task-checkbox:checked::after {
    content: '';
    width: 5px;
    height: 9px;
    border: solid #ffffff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    position: absolute;
    top: 2px;
}

.task-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    user-select: none;
    margin: 0;
}

/* Компактная сетка: ширина блока строго под текст "Задание 25" + значок */
.task-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(125px, 135px));
    gap: 0.6rem;
}

/* Компактная карточка */
.task-item {
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 10px;
    padding: 7px 9px;
    border-left: 3.5px solid #cbd5e1;
    box-sizing: border-box;
    transition: all 0.15s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

body:not(.light-theme) .task-item {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--glass-border);
    border-left-color: rgba(255, 255, 255, 0.2);
}

.task-item.task-perfect {
    border-left-color: #16a34a !important;
    background: #f0fdf4;
}

body:not(.light-theme) .task-item.task-perfect {
    background: rgba(34, 197, 94, 0.1);
}

.task-item.task-partial {
    border-left-color: #f59e0b !important;
    background: #fffbeb;
}

body:not(.light-theme) .task-item.task-partial {
    background: rgba(245, 158, 11, 0.1);
}

.task-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

/* Кликабельный кругляшок переключения статуса в правом верхнем углу */
.task-circle-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    margin: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: #94a3b8;
    border-radius: 50%;
    transition: transform 0.15s ease, color 0.15s ease;
    line-height: 1;
}

.task-circle-btn:hover {
    transform: scale(1.2);
    color: #16a34a;
}

.task-circle-btn.completed {
    color: #16a34a;
}

body:not(.light-theme) .task-circle-btn {
    color: rgba(255, 255, 255, 0.3);
}

body:not(.light-theme) .task-circle-btn:hover,
body:not(.light-theme) .task-circle-btn.completed {
    color: #4ade80;
}

/* Компактный селектор баллов для номеров 26 и 27 */
.task-double-score-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 6px;
    padding-top: 4px;
    border-top: 1px dashed rgba(0, 0, 0, 0.08);
}

body:not(.light-theme) .task-double-score-row {
    border-top-color: rgba(255, 255, 255, 0.08);
}

.task-score-select-compact {
    width: 40px;
    padding: 2px 2px;
    border-radius: 6px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    background: #ffffff;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 0.78rem;
    text-align: center;
    outline: none;
    cursor: pointer;
}

body:not(.light-theme) .task-score-select-compact {
    background: rgba(0, 0, 0, 0.3);
    border-color: var(--glass-border);
}

.task-score-max-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: #94a3b8;
}


/* ========================================================
   ФАЙЛОВЫЙ МЕНЕДЖЕР (SAAS СТИЛЬ)
   ======================================================== */

/* Хлебные крошки в виде капсул */
.saas-breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    padding: 0.6rem 0.9rem;
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 14px;
    margin-bottom: 1.2rem;
    font-size: 0.82rem;
    font-weight: 600;
}

body:not(.light-theme) .saas-breadcrumbs {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--glass-border);
}

.breadcrumb-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border-radius: 8px;
    color: #2563eb;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

body:not(.light-theme) .breadcrumb-pill {
    color: #93c5fd;
}

.breadcrumb-pill:hover {
    background: #eff6ff;
    color: #1d4ed8;
}

body:not(.light-theme) .breadcrumb-pill:hover {
    background: rgba(37, 99, 235, 0.15);
    color: #bfdbfe;
}

.breadcrumb-separator {
    color: #94a3b8;
    font-size: 0.72rem;
}

.breadcrumb-current {
    padding: 3px 8px;
    color: var(--text-primary);
    font-weight: 700;
}

/* Строки таблицы файлов */
.file-row-item {
    transition: background 0.15s ease;
}

.file-row-item.folder-row {
    cursor: pointer;
}

.file-name-cell {
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-icon-box {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}

.file-title-wrap {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.file-main-name {
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 480px;
}

/* Зона Drag-and-Drop */
.files-dropzone {
    position: relative;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.files-dropzone.drag-active {
    outline: 2px dashed #2563eb;
    outline-offset: -4px;
    background: rgba(37, 99, 235, 0.04) !important;
}

/* ========================================================
   ОНЛАЙН-КОМНАТЫ (SAAS СТИЛЬ)
   ======================================================== */

.connect-rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.connect-room-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 1.6rem;
    padding: 1.6rem;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 250px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    box-sizing: border-box;
}

body:not(.light-theme) .connect-room-card {
    background: var(--stat-card-bg);
    border-color: var(--glass-border);
}

.connect-room-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px -8px rgba(0, 0, 0, 0.1);
}

/* Акцентная рамка основной платформы */
.connect-room-card.primary-room {
    border-top: 4px solid #2563eb;
}

.connect-room-card.primary-room:hover {
    border-color: rgba(37, 99, 235, 0.35);
    border-top-color: #2563eb;
}

/* Рамка резервной комнаты */
.connect-room-card.backup-room {
    border-top: 4px solid #f59e0b;
}

.connect-room-card.backup-room:hover {
    border-color: rgba(245, 158, 11, 0.35);
    border-top-color: #f59e0b;
}

.connect-room-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
}

.connect-room-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.connect-room-icon.telemost {
    background: #eff6ff;
    color: #2563eb;
}

body:not(.light-theme) .connect-room-icon.telemost {
    background: rgba(37, 99, 235, 0.2);
    color: #93c5fd;
}

.connect-room-icon.contour {
    background: #fef3c7;
    color: #d97706;
}

body:not(.light-theme) .connect-room-icon.contour {
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
}

.connect-room-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.connect-room-desc {
    font-size: 0.85rem;
    color: #64748b;
    line-height: 1.45;
    margin: 0 0 1.5rem 0;
}

body:not(.light-theme) .connect-room-desc {
    color: #94a3b8;
}

/* Памятка */
.connect-tips-card {
    background: #f8fafc;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 1.4rem;
    padding: 1.3rem 1.5rem;
}

body:not(.light-theme) .connect-tips-card {
    background: rgba(255, 255, 255, 0.02);
    border-color: var(--glass-border);
}

.connect-tips-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.92rem;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

.connect-tips-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.connect-tips-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.82rem;
    color: #64748b;
    line-height: 1.4;
}

body:not(.light-theme) .connect-tips-list li {
    color: #94a3b8;
}

.connect-tips-list li i {
    color: #16a34a;
    font-size: 0.75rem;
    margin-top: 3px;
    flex-shrink: 0;
}


/* ========================================================
   ЕДИНЫЙ СТИЛЬ ВЫПАДАЮЩИХ СПИСКОВ (SELECT)
   ======================================================== */

select,
select.profile-input {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
    background-color: var(--input-surface-bg, #f8fafc) !important;
    color: var(--text-primary, #0f172a) !important;
    border: 1px solid var(--input-border-color, rgba(0, 0, 0, 0.15)) !important;
    border-radius: 12px !important;
    padding: 0.65rem 2.4rem 0.65rem 1rem !important;
    font-size: 0.88rem !important;
    font-family: inherit;
    font-weight: 500;
    line-height: 1.4;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;

    /* Аккуратная SVG-стрелка (chevron) для светлой темы */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 0.85rem center !important;
    background-size: 0.95rem !important;
}

/* Стрелка и фон для тёмной темы */
body:not(.light-theme) select,
body:not(.light-theme) select.profile-input {
    background-color: var(--input-surface-bg, rgba(255, 255, 255, 0.05)) !important;
    color: var(--text-primary, #ffffff) !important;
    border-color: var(--input-border-color, rgba(255, 255, 255, 0.12)) !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") !important;
}

/* Эффект при наведении */
select:hover,
select.profile-input:hover {
    border-color: #2563eb !important;
}

/* Фокус со сглаженным синим свечением */
select:focus,
select.profile-input:focus {
    border-color: #2563eb !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18) !important;
}

/* Оформление пунктов внутри выпадающего списка */
select option {
    background: #ffffff;
    color: #0f172a;
    font-size: 0.9rem;
    padding: 8px 12px;
}

body:not(.light-theme) select option {
    background: #111622;
    color: #ffffff;
}


       /* ========================================================
   КАСТОМНЫЙ ВЫПАДАЮЩИЙ СПИСОК (CUSTOM SELECT)
   ======================================================== */
.custom-select-wrap {
    position: relative;
    user-select: none;
    display: inline-block;
}

.custom-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--input-surface-bg) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--input-border-color) !important;
    border-radius: 12px;
    padding: 0.65rem 1rem;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    gap: 8px;
    min-height: 40px;
    box-sizing: border-box;
}

.custom-select-trigger:hover {
    border-color: #2563eb !important;
}

.custom-select-wrap.open .custom-select-trigger {
    border-color: #2563eb !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.custom-select-trigger .arrow {
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.custom-select-wrap.open .arrow {
    transform: rotate(180deg);
}

.custom-select-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    min-width: 100%;
    background: var(--modal-surface-bg) !important;
    border: 1px solid var(--modal-border) !important;
    border-radius: 14px;
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(14px);
    z-index: 1500;
    max-height: 220px;
    overflow-y: auto;
    display: none;
    padding: 5px;
    box-sizing: border-box;
}

.custom-select-wrap.open .custom-select-dropdown {
    display: block;
}

.custom-select-item {
    padding: 0.6rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    white-space: nowrap;
}

.custom-select-item:hover {
    background: rgba(37, 99, 235, 0.12);
    color: #2563eb;
}

.custom-select-item.selected {
    background: #2563eb;
    color: #ffffff;
    font-weight: 700;
}

/* Переменные для кастомных списков под светлую и тёмную темы */
:root {
    --input-surface-bg: #ffffff;
    --input-border-color: rgba(0, 0, 0, 0.12);
    --modal-surface-bg: #ffffff;
    --modal-border: rgba(0, 0, 0, 0.08);
}

body:not(.light-theme) {
    --input-surface-bg: rgba(255, 255, 255, 0.05);
    --input-border-color: var(--glass-border);
    --modal-surface-bg: #141a26;
    --modal-border: var(--glass-border);
}

/* Стилизация поля даты и времени под стиль custom-select */
.modal-datetime-input {
    width: 100%;
    background: var(--input-surface-bg) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--input-border-color) !important;
    border-radius: 12px;
    padding: 0.65rem 1rem;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
    min-height: 40px;
    cursor: pointer;
}

body:not(.light-theme) .modal-datetime-input {
    color-scheme: dark; /* темная тема для встроенного календаря браузера */
}

.modal-datetime-input:hover {
    border-color: #2563eb !important;
}

.modal-datetime-input:focus {
    border-color: #2563eb !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Всплывающее уведомление снизу экрана */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast-notification {
    pointer-events: auto;
    background: #ffffff;
    color: #0f172a;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 14px;
    padding: 0.9rem 1.4rem;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 290px;
    max-width: 440px;
    font-size: 0.88rem;
    font-weight: 600;
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

body:not(.light-theme) .toast-notification {
    background: #111622;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

.toast-notification.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-notification.success {
    border-left: 5px solid #16a34a;
}

.toast-notification.error {
    border-left: 5px solid #ef4444;
}

.toast-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    color: #16a34a;
}

.toast-notification.error .toast-icon {
    color: #ef4444;
}


/* ========================================================
   ВКЛАДКА ПОДКЛЮЧЕНИЯ (ОФОРМЛЕНИЕ ПАНЕЛИ РЕПЕТИТОРА)
   ======================================================== */
.connect-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.connect-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 2rem;
    padding: 2.4rem 2rem;
    text-align: center;
    transition: all 0.25s ease;
    cursor: pointer;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

body:not(.light-theme) .connect-card {
    background: var(--stat-card-bg);
    border-color: var(--glass-border);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.4);
}

.connect-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 35px -10px rgba(0, 0, 0, 0.12);
}

body:not(.light-theme) .connect-card:hover {
    background: var(--card-hover-bg);
    border-color: var(--glass-border-hover);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.6);
}

.connect-icon {
    width: 80px;
    height: 80px;
    margin: 1.2rem auto 1.4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.3rem;
    transition: transform 0.25s ease;
}

.connect-card:hover .connect-icon {
    transform: scale(1.08);
}

.connect-icon.yandex {
    background: linear-gradient(135deg, #ef4444, #b91c1c);
    color: #ffffff;
    box-shadow: 0 8px 20px rgba(220, 38, 38, 0.35);
}

.connect-icon.kontur {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: #ffffff;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
}

.connect-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

.connect-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.55;
    margin-bottom: 1.8rem;
    max-width: 380px;
}

.connect-btn-main {
    width: 100%;
    padding: 0.85rem 1.6rem;
    border-radius: 40px;
    font-weight: 700;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
}

.connect-btn-yandex {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.3);
}

.connect-btn-yandex:hover {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
    transform: translateY(-2px);
}

.connect-btn-kontur {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.connect-btn-kontur:hover {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
}

/* Карточка рекомендаций */
.connect-info {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 1.8rem;
    padding: 1.8rem 2.2rem;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.04);
}

body:not(.light-theme) .connect-info {
    background: var(--stat-card-bg);
    border-color: var(--glass-border);
}

.connect-info h4 {
    margin-bottom: 1.1rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.connect-info h4 i {
    color: #2563eb;
}

.connect-info ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.connect-info li {
    padding-left: 1.8rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
}

.connect-info li i {
    position: absolute;
    left: 0;
    top: 0.2rem;
    color: #16a34a;
    font-size: 0.95rem;
}

/* ========================================================
   ОФОРМЛЕНИЕ СЛОТОВ В МОДАЛЬНОМ ОКНЕ ПЕРЕНОСА ЗАНЯТИЯ
   ======================================================== */

#available-slots-container {
    max-height: 320px;
    overflow-y: auto;
    padding-right: 6px;
    margin-bottom: 1.2rem;
}

/* Карточка группы слотов по дате */
.slots-section {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 1.2rem;
    padding: 1rem 1.1rem;
    margin-bottom: 0.9rem;
}

body.light-theme .slots-section {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, 0.06);
}

/* Заголовок даты и дня недели */
.slots-date-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: capitalize;
}

.slots-date-title i {
    color: #2563eb;
    font-size: 0.9rem;
}

/* Сетка кнопок со слотами */
.slots-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* Кнопка конкретного времени */
.slot-option-btn {
    background: rgba(37, 99, 235, 0.1);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.25);
    padding: 0.5rem 0.95rem;
    border-radius: 30px;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    outline: none;
    transition: all 0.2s ease;
}

body.light-theme .slot-option-btn {
    background: #ffffff;
    color: #1e293b;
    border-color: rgba(0, 0, 0, 0.12);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

.slot-option-btn i {
    font-size: 0.8rem;
    opacity: 0.85;
}

/* Наведение на кнопку */
.slot-option-btn:hover {
    background: #2563eb;
    color: #ffffff;
    border-color: #2563eb;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.slot-option-btn:hover i {
    color: #ffffff;
}

/* Выбранный слот */
.slot-option-btn.selected {
    background: #2563eb !important;
    color: #ffffff !important;
    border-color: #2563eb !important;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4) !important;
}

.slot-option-btn.selected i {
    color: #ffffff !important;
}

/* Заглушка, если нет доступных слотов */
.empty-slots {
    text-align: center;
    padding: 2.2rem 1rem;
    color: #94a3b8;
}

.empty-slots i {
    font-size: 2.2rem;
    color: #f59e0b;
    margin-bottom: 0.6rem;
}

.empty-slots p {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.empty-slots small {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Интерактивные пустые ячейки календаря */
.lesson-cell.empty {
    cursor: pointer !important;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.lesson-cell.empty:hover {
    background: rgba(34, 197, 94, 0.08) !important;
    border: 1px dashed rgba(34, 197, 94, 0.5) !important;
}

body:not(.light-theme) .lesson-cell.empty:hover {
    background: rgba(34, 197, 94, 0.12) !important;
    border-color: rgba(74, 222, 128, 0.4) !important;
}