/* Tutorials page layout (split from legacy course styles) */

.tutorials-page-container {
    padding-top: 120px;
    padding-bottom: var(--space-8);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    overflow-x: hidden;
}

/* Video Gallery Layout */
.tutorials-gallery {
    display: grid;
    grid-template-columns: 1fr 350px;
    grid-template-areas:
        "player sidebar"
        "actions sidebar";
    gap: var(--space-6);
    margin-bottom: var(--space-12);
}

.video-panel {
    grid-area: player;
    width: 100%;
}

.video-sidebar {
    grid-area: sidebar;
    width: 100%;
}

.lesson-actions {
    grid-area: actions;
    width: 100%;
}

.video-main-player {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--glass-border-strong);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    position: relative;
}

.video-main-player iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Sidebar - Lesson List */
.video-sidebar {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    height: fit-content;
    box-shadow: var(--glass-inner-glow);
}

.video-sidebar h3 {
    margin-bottom: var(--space-4);
    font-size: 1.2rem;
    color: var(--neon-green);
    font-family: 'Unbounded', sans-serif;
}

.lesson-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.lesson-nav-btn {
    width: 100%;
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-dim);
    text-align: left;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    transition: var(--transition-base);
}

.lesson-nav-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--glass-border-strong);
    transform: translateX(2px);
}

.lesson-nav-btn.active {
    background: linear-gradient(to right, rgba(16, 185, 129, 0.1), transparent);
    border-color: var(--neon-green);
    color: var(--text-white);
}

.lesson-nav-btn .lesson-number {
    font-family: 'Unbounded', sans-serif;
    font-size: 0.8rem;
    color: var(--neon-green);
    opacity: 0.7;
}

/* Lesson Actions (Downloads) */
.lesson-actions {
    margin-top: var(--space-6);
    display: grid;
    gap: var(--space-3);
}

.btn-download-special {
    background: rgba(16, 185, 129, 0.1);
    color: var(--neon-green);
    border: 1px solid var(--neon-green);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    transition: var(--transition-base);
    text-align: center;
}

.btn-download-special:hover {
    background: var(--neon-green);
    color: #020617;
    box-shadow: 0 0 20px var(--accent-green-glow);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .btn-download-special {
        font-size: 0.8rem;
        padding: 10px 12px;
        white-space: normal;
        line-height: 1.4;
        text-align: left;
        justify-content: flex-start;
    }
}

.comment-input-area {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.comment-textarea {
    width: 100%;
    min-height: 100px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    color: var(--text-white);
    font-family: inherit;
    resize: vertical;
    transition: var(--transition-base);
}

.comment-textarea:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--neon-green);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.1);
}

.comment-input-actions {
    display: flex;
    justify-content: flex-end;
}

.btn-sm {
    padding: var(--space-2) var(--space-5);
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

.mock-comments {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.comment-item {
    display: flex;
    gap: var(--space-3);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--glass-border);
}

.avatar-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-green);
    flex-shrink: 0;
}

.comment-body p {
    font-size: 0.85rem;
    color: var(--text-dim);
}

/* Course Details Layout (Desktop) */
.tutorials-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    margin-top: var(--space-12);
    align-items: start;
}

.details-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    box-shadow: var(--glass-inner-glow);
}

.details-card h3 {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--neon-green);
    font-size: 1.2rem;
    margin-bottom: var(--space-6);
}

@media (max-width: 1100px) {
    /* === Tutorials page scroll-lock (mobile/tablet only) === */
    /* Lock html/body so the page behaves like a native app - no pull-to-refresh, no body scroll. */
    html,
    body {
        height: 100vh !important;
        max-height: 100vh !important;
        min-height: 100vh !important;
        overflow: hidden !important;
        overscroll-behavior: none !important;
    }

    .tutorials-page-container {
        padding-top: 64px;
        padding-left: var(--space-4);
        padding-right: var(--space-4);
        padding-bottom: 0;
        height: 100vh !important;
        max-height: calc(100vh - 64px) !important;
        overflow: hidden !important;
    }

    .tutorials-gallery {
        display: flex;
        flex-direction: column;
        gap: var(--space-4);
        height: 100%;
        overflow: hidden;
    }

    .u-tutorial-info {
        flex-shrink: 0;
    }

    .tutorials-details-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        margin-top: var(--space-4);
    }

    .details-card {
        padding: var(--space-4);
        width: 100%;
    }

    .video-panel {
        flex-shrink: 0;
    }

    .u-tutorial-info {
        flex-shrink: 0;
    }

    .video-sidebar {
        padding: var(--space-4);
        width: 100%;
        flex: 1 1 auto;
        min-height: 0;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }

    .video-sidebar h3 {
        flex-shrink: 0;
    }

    .lesson-nav {
        flex: 1 1 auto;
        min-height: 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .lesson-nav::-webkit-scrollbar {
        display: none;
    }

    .lesson-nav-btn {
        padding: var(--space-3);
        word-break: break-word;
    }

    .video-main-player {
        border-radius: var(--radius-md);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }
}

@media (max-width: 480px) {
    html,
    body {
        height: 100vh !important;
        max-height: 100vh !important;
        min-height: 100vh !important;
        overflow: hidden !important;
        overscroll-behavior: none !important;
    }

    .tutorials-page-container {
        padding-top: 84px;
        padding-left: var(--space-2);
        padding-right: var(--space-2);
        padding-bottom: 0;
        height: 100vh !important;
        max-height: calc(100vh - 84px) !important;
        min-height: calc(100vh - 84px);
        overflow: hidden !important;
    }

    .tutorials-gallery {
        height: 100%;
        overflow: hidden;
        gap: var(--space-3);
    }

    .video-panel {
        flex-shrink: 0;
    }

    .video-main-player {
        border-radius: var(--radius-md);
    }

    .u-tutorial-info {
        margin-top: var(--space-2);
    }

    .video-sidebar {
        padding: var(--space-3);
        flex: 1 1 auto;
        min-height: 0;
        overflow: hidden;
    }

    .video-sidebar h3 {
        margin-bottom: var(--space-3);
    }

    .lesson-nav {
        flex: 1 1 auto;
        min-height: 0;
        max-height: none;
        overflow-y: auto;
    }

    .lesson-nav-btn {
        padding: 18px var(--space-3);
        word-break: break-word;
    }

    .details-card {
        padding: var(--space-3);
    }

    .lock-overlay-content {
        padding: var(--space-4);
    }

    .lock-overlay-content h3 {
        font-size: 1.4rem !important;
    }

    .lock-overlay-content p {
        font-size: 0.9rem !important;
    }
}

/* Mobile phone portrait only: make lesson list denser and easier to scroll. */
@media (max-width: 480px) and (orientation: portrait) {
    .tutorials-gallery {
        gap: 8px;
    }

    .video-sidebar {
        padding: 10px;
    }

    .video-sidebar h3 {
        margin-bottom: 8px;
        font-size: 0.95rem;
    }

    .lesson-nav {
        display: grid;
        gap: 8px;
    }

    .lesson-nav-btn {
        padding: 10px 12px;
        font-size: 0.95rem;
        line-height: 1.25;
    }

    .lesson-nav-btn .lesson-number {
        min-width: 34px;
        font-size: 0.95rem;
    }
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2, 6, 23, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    max-width: 450px;
    width: 90%;
    padding: var(--space-8);
    text-align: center;
    position: relative;
    border: 1px solid var(--glass-border-strong);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8), var(--glass-inner-glow);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    font-size: 1.5rem;
    color: var(--text-dim);
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-white);
}

/* Locked Lesson Icons in Sidebar */
.lesson-nav-btn {
    position: relative;
}

.lock-icon {
    margin-left: auto;
    color: var(--neon-green);
    opacity: 0.9;
    filter: drop-shadow(0 0 5px rgba(16, 185, 129, 0.4));
    transition: var(--transition-base);
}

.lesson-nav-btn:hover .lock-icon {
    opacity: 1;
    transform: scale(1.1);
}

/* Player Paywall Overlay */
.player-lock-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2, 6, 23, 0.6);
    backdrop-filter: blur(40px) saturate(200%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.player-lock-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lock-overlay-content {
    text-align: center;
    padding: var(--space-10);
    max-width: 500px;
    width: 90%;
    border-radius: var(--radius-xl);
    animation: lockContentEntry 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.lock-icon-large {
    width: 80px;
    height: 80px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--neon-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
    border: 1px solid rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.2);
}

.lock-overlay-content h3 {
    font-size: 2.2rem;
    margin-bottom: var(--space-4);
    color: var(--text-white);
    font-family: 'Unbounded', sans-serif;
    letter-spacing: -0.02em;
}

.lock-overlay-content p {
    color: var(--text-dim);
    margin-bottom: var(--space-10);
    font-size: 1.15rem;
    line-height: 1.6;
}

.btn-unlock {
    width: 100%;
    padding: var(--space-5);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

@keyframes lockContentEntry {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }

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

/* Enhanced Modal "Pop" Feel */
.modal-overlay.open .modal-content {
    animation: modalPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes modalPop {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(30px);
    }

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

@media (max-width: 768px) {
    .lock-overlay-content {
        padding: var(--space-6);
    }

    .lock-overlay-content h3 {
        font-size: 1.6rem;
    }

    .lock-overlay-content p {
        font-size: 1rem;
        margin-bottom: var(--space-8);
    }

    .lock-icon-large {
        width: 60px;
        height: 60px;
        margin-bottom: var(--space-4);
    }
}