:root {
    /* Minimal — Jony Ive style */
    --bg-gradient: linear-gradient(180deg, #fafbfc 0%, #f0f2f5 100%);
    --text-color: #1d1d1f;
    --text-secondary: #6e6e73;
    --header-color: #1d1d1f;
    --cyan: #007aff;
    --liquid-gradient: linear-gradient(135deg, #007aff 0%, #00c6fb 100%);

    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(0, 0, 0, 0.04);
    --glass-blur: blur(20px);
    --card-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
    --btn-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
    --btn-shadow-active: 0 1px 4px rgba(0, 0, 0, 0.1);
}

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

.header-logo {
    height: 80px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* Логотип — бесшовный белый фон, без «квадрата» и наложения */
.app-logo-wrap,
.login-logo-wrap,
.sidebar-header .app-logo-wrap,
.sidebar-header-top .app-logo-wrap,
.site-header .app-logo-wrap,
.header-logo-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #ffffff !important;
    background-color: #ffffff !important;
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
    padding: 0 !important;
    margin: 0;
    border-radius: 0 !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    filter: none !important;
}

.app-logo,
#login-logo,
#user-logo,
#admin-logo,
img.app-logo,
img[src*="logo.png"],
.header-logo {
    width: 160px;
    height: auto;
    max-width: 100%;
    object-fit: contain;
    display: block;
    background: #ffffff !important;
    background-color: #ffffff !important;
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
    border-radius: 0 !important;
    filter: none !important;
    mix-blend-mode: normal !important;
}

.login-card.card,
.login-card {
    background: #ffffff !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border: none !important;
    box-shadow: none !important;
}

.login-card .login-logo-wrap,
.login-card .app-logo-wrap {
    background: #ffffff !important;
    border: none !important;
    box-shadow: none !important;
}

.site-header.card,
.site-header {
    padding: 1rem 1.5rem !important;
    background: #ffffff !important;
    border: none !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

.sidebar-header .sidebar-header-top {
    background: #ffffff !important;
    border: none !important;
    box-shadow: none !important;
}

@media (min-width: 769px) {
    .app-logo,
    #login-logo,
    #user-logo,
    #admin-logo {
        width: 220px;
        height: auto;
    }
}

.scoreboard-points {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}
.scoreboard-points button {
    width: 28px;
    height: 28px;
    padding: 0;
    font-size: 1rem;
    line-height: 1;
    border-radius: 8px;
}
.scoreboard-points .pts-value {
    min-width: 2rem;
    text-align: center;
    font-weight: 700;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Montserrat', sans-serif;
    background: var(--bg-gradient);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-color);
    padding: 2rem 1.5rem;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 1100px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 0 0.5rem;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    transition: box-shadow 0.25s ease;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.card:hover {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--header-color);
    letter-spacing: -0.03em;
    line-height: 1.2;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    color: var(--header-color);
    letter-spacing: -0.02em;
}

/* Minimal Buttons */
.btn-glow {
    background: var(--liquid-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.2s;
    box-shadow: var(--btn-shadow);
    align-self: flex-start;
    flex-shrink: 0;
}

.btn-glow:hover {
    opacity: 0.92;
    transform: translateY(-1px);
}

.btn-glow:active {
    transform: translateY(0);
    box-shadow: var(--btn-shadow-active);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 0.7;
}

/* Inputs */
.admin-select,
.option-btn,
textarea {
    background: rgba(255, 255, 255, 0.9) !important;
    border: 1px solid rgba(0, 0, 0, 0.08) !important;
    border-radius: 12px;
    padding: 0.9rem 1.25rem;
    font-family: inherit;
    color: var(--text-color) !important;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-weight: 500;
}

.admin-select:focus,
.option-btn:focus,
textarea:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.option-btn {
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-size: 1rem;
}

#lesson-items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

#lesson-items .option-btn {
    margin-bottom: 0;
}

.option-btn:hover {
    background: rgba(248, 249, 250, 1) !important;
}

.option-btn:active {
    transform: scale(0.99);
}

/* Thin Gradient Progress-bar */
.quiz-progress {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 20px;
    margin-bottom: 3rem;
    overflow: hidden;
    position: relative;
    box-shadow: inset 1px 1px 3px rgba(0, 0, 0, 0.05);
}

.progress-bar {
    height: 100%;
    background: var(--liquid-gradient);
    width: 0%;
    border-radius: 20px;
    transition: width 1s cubic-bezier(0.19, 1, 0.22, 1);
}

/* Result Icons with Gradient Glow */
.archetype-icon {
    width: 180px;
    height: 180px;
    margin: 4rem auto;
    filter: drop-shadow(0 0 30px rgba(0, 210, 255, 0.6));
    perspective: 1000px;
}

.archetype-icon svg {
    width: 100%;
    height: 100%;
    stroke: url(#lgrad);
    stroke-width: 2.5;
    fill: none;
}

/* Dashboard & Course Map */
.dashboard-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    width: 100%;
    max-width: 100%;
}

.dashboard-grid>div {
    flex: 1;
    min-width: 0;
    width: 100%;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.module-card {
    height: 200px;
    min-height: 200px;
    border-radius: 20px;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
    background-color: #ffffff;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.module-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.module-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0.15) 50%, transparent 100%);
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 0.75rem;
}

.module-badge {
    background: rgba(255, 255, 255, 0.25);
    padding: 0.25rem 0.65rem;
    border-radius: 8px;
    font-size: 0.65rem;
    font-weight: 600;
    color: white;
    letter-spacing: 0.5px;
    align-self: flex-start;
}

.module-title {
    color: white;
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 0.35rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.module-locked {
    pointer-events: none;
}

.module-locked .module-card-overlay {
    cursor: default;
}

.module-overlay-locked {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.5) 50%, rgba(0, 0, 0, 0.3) 100%) !important;
    filter: brightness(0.75);
}

.module-overlay-locked .module-title,
.module-overlay-locked .module-badge {
    opacity: 0.85;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.module-lock-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    opacity: 0.9;
}

/* Dashboard layout — left sidebar + main */
.dashboard-layout {
    display: flex;
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 2rem);
    gap: 0;
}

.dashboard-sidebar {
    width: 240px;
    min-width: 240px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    box-shadow: var(--card-shadow);
}

.sidebar-header {
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.sidebar-header .header-logo { height: 48px; }

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

.sidebar-btn {
    text-align: left;
    padding: 0.75rem 1rem;
    border: none;
    background: rgba(0,0,0,0.03);
    border-radius: 12px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-color);
}

.sidebar-btn:hover { background: rgba(0,122,255,0.08); }
.sidebar-btn.active { background: var(--liquid-gradient); color: white; }

.dashboard-main {
    flex: 1;
    min-width: 0;
    padding: 1.5rem 2rem;
    overflow-y: auto;
}

.dashboard-view { display: none !important; }
.dashboard-view.active { display: block !important; }

.welcome-banner { margin-bottom: 1.5rem; }

.my-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(200px, 100%), 1fr));
    gap: 1.25rem;
}

.my-card-item { padding: 1rem; overflow: hidden; }
.my-card-visual { width: 100%; aspect-ratio: 3/4; border-radius: 12px; background-size: cover; background-position: center; margin-bottom: 0.75rem; }
.my-card-meta { font-size: 0.75rem; opacity: 0.6; margin-bottom: 0.5rem; }
.my-card-meaning { font-size: 0.9rem; font-style: italic; line-height: 1.5; }

/* Награда недели — flip-карты */
.week-cards-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.reward-card-flip {
    width: 100px;
    height: 140px;
    perspective: 800px;
    cursor: pointer;
}

.reward-card-flip.is-flipped {
    pointer-events: none;
}

.reward-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.reward-card-flip.is-flipped .reward-card-inner {
    transform: rotateY(180deg);
}

.reward-card-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.reward-card-back {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.reward-card-back::after {
    content: '✦';
    font-size: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.reward-card-front {
    transform: rotateY(180deg);
    background-size: cover;
    background-position: center;
    background-color: #e8e8ed;
}

.insight-points-badge {
    background: rgba(0, 122, 255, 0.08);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    text-align: center;
}

.secret-mastermind-celebration {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    border: 1px solid rgba(102, 126, 234, 0.25);
    border-radius: 16px;
    padding: 1.25rem;
    text-align: center;
}

.lesson-md-link {
    color: var(--cyan);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid rgba(0, 122, 255, 0.35);
    transition: opacity 0.2s;
}
.lesson-md-link:hover { opacity: 0.75; }

.lesson-item-locked {
    padding: 1.2rem;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.04);
    border: 1px dashed rgba(0, 0, 0, 0.12);
    color: var(--text-secondary);
    cursor: not-allowed;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    opacity: 0.75;
}

.tariff-blocked-stub {
    text-align: center;
    padding: 3rem 2rem;
    border-radius: 16px;
    background: rgba(0, 0, 0, 0.03);
    border: 1px dashed rgba(0, 0, 0, 0.1);
}
.tariff-blocked-stub .lock-icon { font-size: 2.5rem; margin-bottom: 1rem; }

.notification-bell-wrap { position: relative; flex-shrink: 0; }
.notification-bell-btn {
    position: relative;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.notification-bell-btn:hover { background: rgba(0, 122, 255, 0.1); }
.notification-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 18px;
    height: 18px;
    padding: 0 4px;
    background: #ff3b30;
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.notification-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: min(320px, 90vw);
    max-height: 360px;
    overflow-y: auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(0, 0, 0, 0.06);
    z-index: 1000;
    padding: 0.5rem;
}
.notification-item {
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    line-height: 1.4;
    cursor: pointer;
    margin-bottom: 0.25rem;
}
.notification-item:hover { background: rgba(0, 122, 255, 0.06); }
.notification-item.unread { background: rgba(0, 122, 255, 0.08); font-weight: 600; }
.notification-empty { padding: 1.5rem; text-align: center; opacity: 0.5; font-size: 0.85rem; }

.sidebar-header-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
    width: 100%;
}

#lesson-viewer .lesson-nav-bar .btn-glow { background: rgba(255,255,255,0.2); }
#lesson-viewer .lesson-nav-bar .btn-glow:hover { background: var(--liquid-gradient); }

@media (max-width: 768px) {
    .dashboard-layout { flex-direction: column; }
    .dashboard-sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; padding: 1rem; }
    .sidebar-nav { flex-direction: row; flex-wrap: wrap; gap: 0.5rem; }
    .sidebar-btn { flex: 1; min-width: 120px; padding: 0.6rem; font-size: 0.85rem; }
    .dashboard-main { padding: 1rem; }
    .login-card { padding: 2rem 1.5rem; }
    .card { padding: 1.25rem; }
    .lesson-modal .card.modal-content { margin: 1rem; max-height: calc(100vh - 2rem); }
    /* Карта курса — под ширину экрана */
    .course-map-wrapper { max-width: 100% !important; }
    .course-map-section { padding: 1rem !important; overflow: hidden; }
    .course-map-box { width: 100%; max-width: 100%; }
    /* Админка — карта и контент по ширине */
    .admin-layout { flex-direction: column; gap: 1rem; }
    .admin-nav { flex-direction: row; flex-wrap: wrap; min-width: 100%; }
    .admin-main { width: 100%; min-width: 0; overflow-x: hidden; }
}

.lesson-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    max-height: 90vh;
    animation: slideUp 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.avatar-chip {
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-chip img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

/* Карта курса — без белых половин и чёрных полос, подстройка под контейнер */
.course-map-wrapper,
.course-map-box {
    width: 100%;
    max-width: 100%;
    aspect-ratio: 4/5;
    border-radius: 16px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.08);
    background: #1a1a1a;
}

.course-map-wrapper {
    margin: 0 auto;
    position: relative;
}

.course-map-box {
    min-height: 0;
    /* масштаб 180% — полностью убираем белую полосу справа */
    background-size: 180% !important;
    background-position: left center !important;
    background-repeat: no-repeat !important;
}

.course-map-full {
    width: 100%;
    height: 100%;
    background-size: 180% !important;
    background-position: left center !important;
    background-repeat: no-repeat !important;
}

/* Маркеры модулей — видимы над картой, под аватаром */
.course-map-module-markers {
    z-index: 3;
}

.course-map-module-num {
    z-index: 4;
}

.course-map-path {
    position: absolute;
    bottom: 20%;
    left: 5%;
    right: 5%;
    height: 3px;
    background: linear-gradient(90deg, rgba(0,122,255,0.3), rgba(0,198,251,0.5));
    border-radius: 2px;
    transform-origin: left center;
}

.course-map-avatar {
    position: absolute;
    width: 36px;
    height: 36px;
    left: 5%;
    top: 75%;
    transform: translate(-50%, -50%);
    transition: left 0.5s ease, top 0.5s ease;
    z-index: 5;
    border-radius: 50%;
    overflow: hidden;
    pointer-events: none;
}

.course-map-avatar img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.course-map-bonus {
    position: absolute;
    font-size: 20px;
    bottom: 15%;
    z-index: 2;
}

.course-map {
    height: 300px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    position: relative;
    padding: 2rem;
    overflow: hidden;
}

.map-line {
    position: absolute;
    top: 50%;
    left: 10%;
    width: 80%;
    height: 2px;
    background: rgba(0, 0, 0, 0.05);
}

.map-dot {
    position: absolute;
    width: 24px;
    height: 24px;
    background: white;
    border: 2px solid var(--glass-border);
    border-radius: 50%;
    top: calc(50% - 12px);
    transition: all 0.5s ease;
    box-shadow: var(--btn-shadow);
    cursor: help;
}

.map-dot.active {
    background: var(--liquid-gradient);
    border-color: transparent;
    box-shadow: 0 0 15px var(--cyan);
}

.event-widget {
    background: var(--liquid-gradient);
    color: white;
    padding: 2rem;
    border-radius: 30px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
}

.event-countdown {
    font-size: 2.5rem;
    font-weight: 800;
}

.coins-badge {
    background: rgba(255, 215, 0, 0.15);
    border: 1px solid rgba(184, 134, 11, 0.4);
    color: #8b6914;
    padding: 0.45rem 0.9rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.header-timer-container {
    position: relative;
}

.popover {
    position: absolute;
    top: 120%;
    right: 0;
    width: 280px;
    z-index: 1000;
    padding: 1.5rem !important;
    border-radius: 20px !important;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2) !important;
    animation: fadeIn 0.3s ease;
}

/* Admin Styles */
#init-quizzes {
    background: #00d2ff;
    color: #1a2a6c;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.6;
    white-space: nowrap;
}

.admin-progress-table th {
    padding: 0.75rem 0.5rem;
}

/* Admin Navigation Fix */
.admin-tabs {
    display: flex;
    justify-content: flex-start;
    gap: 0.8rem;
    overflow-x: auto;
    padding: 1.5rem 0.5rem;
    scrollbar-width: thin;
    scrollbar-color: var(--cyan) rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 2rem;
}

.admin-tabs::-webkit-scrollbar {
    height: 6px;
}

.admin-tabs::-webkit-scrollbar-thumb {
    background: var(--cyan);
    border-radius: 10px;
    box-shadow: 0 0 10px var(--cyan);
}

.admin-nav .tab-btn {
    white-space: nowrap;
    flex-shrink: 0;
    text-align: center;
}

.tab-btn,
.play-pause-btn {
    transition: opacity 0.2s, transform 0.2s;
}

.btn-primary-liquid {
    background: var(--liquid-gradient) !important;
    color: white !important;
}

/* Audio Player */
.audio-player {
    background: rgba(248, 249, 250, 0.9);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    padding: 1.25rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.25rem 0;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.play-pause-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--liquid-gradient);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 2px 12px rgba(0, 122, 255, 0.35);
}

.player-progress-container {
    flex-grow: 1;
    height: 8px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
}

.player-progress-bar {
    height: 100%;
    background: var(--liquid-gradient);
    border-radius: 10px;
    width: 0%;
    box-shadow: 0 0 15px var(--cyan);
    position: relative;
}

/* Range input styling */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    height: 8px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.2);
    border: 2px solid var(--cyan);
}

.speed-toggle {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1.5rem;
    border-radius: 100px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 8px 8px 15px rgba(0, 0, 0, 0.1), -8px -8px 15px rgba(255, 255, 255, 0.9);
    transition: 0.3s;
}

.speed-toggle:hover {
    transform: scale(1.05);
}

/* Course Builder UI */
.builder-module {
    border-left: 5px solid var(--cyan);
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.lesson-input-group {
    background: rgba(255, 255, 255, 0.2);
    padding: 1.5rem;
    border-radius: 20px;
    margin-top: 1rem;
    display: grid;
    gap: 1rem;
}

.admin-table td {
    padding: 2rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 0.65rem 1.25rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.tab-btn:hover {
    color: var(--text-color);
}

.tab-btn.active {
    color: var(--text-color);
    font-weight: 600;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    body {
        padding: 2rem 0.75rem;
        overflow-x: hidden;
    }

    h1 {
        font-size: 2rem;
    }

    .container {
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 0.75rem;
        overflow-x: hidden;
    }

    .card {
        padding: 1.5rem 1rem;
        border-radius: 20px;
        overflow-x: hidden;
    }

    header {
        flex-direction: column;
        flex-wrap: wrap;
        gap: 1rem;
        padding: 1rem !important;
    }

    .lesson-row {
        grid-template-columns: 1fr !important;
    }

    .modules-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .dashboard-grid>div {
        min-width: 100%;
    }

    .btn-glow {
        width: auto;
        max-width: 100%;
        text-align: center;
        padding: 0.8rem 1.2rem;
    }

    .lesson-modal .card.modal-content {
        max-width: 95%;
        width: 95%;
    }
}

@media (max-width: 480px) {
    body {
        padding: 1.5rem 0.5rem;
    }

    .modules-grid {
        gap: 0.75rem;
    }

    .module-card {
        height: 160px;
    }

    .lesson-links-grid {
        grid-template-columns: 1fr !important;
    }

    .course-map-wrapper { max-width: 100% !important; margin: 0 !important; }
    .admin-select, .admin-nav .tab-btn { max-width: 100%; }
}