/* ========================================================================
   MSS Course Player — Dark Theme
   ======================================================================== */

:root {
    --mss-bg-primary: #0a0a0a;
    --mss-bg-secondary: #111111;
    --mss-bg-tertiary: #1a1a1a;
    --mss-bg-card: #151515;
    --mss-accent: #c8ff00;
    --mss-accent-dim: #a0cc00;
    --mss-text-primary: #ffffff;
    --mss-text-secondary: #b0b0b0;
    --mss-text-muted: #666666;
    --mss-border: #2a2a2a;
    --mss-sidebar-width: 360px;
    --mss-header-height: 64px;
}

/* ========== RESET ========== */
.mss-course-player,
.mss-course-player * {
    box-sizing: border-box;
}

.mss-course-player {
    background: var(--mss-bg-primary);
    color: var(--mss-text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* Override Tutor LMS defaults */
.mss-course-player .tutor-single-lesson-wrap,
.mss-course-player .tutor-course-content-wrap {
    background: var(--mss-bg-primary);
    color: var(--mss-text-primary);
}

/* Hide parent theme and Tutor LMS default wrappers on MSS pages */
body.single-courses .tutor-course-details-page,
body.single-courses .tutor-single-course-sidebar,
body.single-courses .site-main > *:not(.mss-course-player),
body.single-courses .entry-header,
body.single-courses .entry-content > *:not(.mss-course-player),
body.single-lesson .site-main > *:not(.mss-course-player),
body.single-lesson .entry-header {
    display: none !important;
}

/* Account for WP admin bar */
.admin-bar .mss-player-header {
    top: 32px;
}

.admin-bar .mss-main-content {
    padding-top: calc(var(--mss-header-height) + 32px);
}

.admin-bar .mss-sidebar {
    top: calc(var(--mss-header-height) + 32px);
}

/* ========== HEADER ========== */
.mss-player-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--mss-header-height);
    background: var(--mss-bg-primary);
    border-bottom: 1px solid var(--mss-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 1000;
}

.mss-header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.mss-logo {
    font-size: 22px;
    font-weight: 900;
    color: var(--mss-accent);
    letter-spacing: 2px;
    text-decoration: none;
    border: 2px solid var(--mss-accent);
    padding: 4px 10px;
    line-height: 1;
}

.mss-logo:hover {
    color: var(--mss-accent);
    text-decoration: none;
}

.mss-course-title-header {
    font-size: 14px;
    color: var(--mss-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: none;
}

@media (min-width: 768px) {
    .mss-course-title-header { display: block; }
}

.mss-header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mss-progress-bar-header {
    display: none;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--mss-text-secondary);
}

@media (min-width: 768px) {
    .mss-progress-bar-header { display: flex; }
}

.mss-progress-track {
    width: 120px;
    height: 4px;
    background: var(--mss-bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.mss-progress-fill {
    height: 100%;
    background: var(--mss-accent);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.mss-btn-back {
    color: var(--mss-text-secondary);
    text-decoration: none;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mss-btn-back:hover {
    color: var(--mss-accent);
    text-decoration: none;
}

/* ========== MAIN CONTENT ========== */
.mss-main-content {
    flex: 1;
    margin-left: 0;
    min-width: 0;
    padding-top: var(--mss-header-height);
}

@media (min-width: 1024px) {
    .mss-main-content { margin-left: var(--mss-sidebar-width); }
}

/* ========== SIDEBAR ========== */
.mss-sidebar {
    width: var(--mss-sidebar-width);
    background: var(--mss-bg-secondary);
    border-right: 1px solid var(--mss-border);
    position: fixed;
    top: var(--mss-header-height);
    left: 0;
    bottom: 0;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 900;
}

.mss-sidebar.open { transform: translateX(0); }

@media (min-width: 1024px) {
    .mss-sidebar { transform: translateX(0); }
}

.mss-sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 899;
}

.mss-sidebar-overlay.active { display: block; }

@media (min-width: 1024px) {
    .mss-sidebar-overlay.active { display: none; }
}

.mss-sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--mss-border);
}

.mss-sidebar-header h2 {
    font-size: 16px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 4px;
    color: var(--mss-text-primary);
}

.mss-sidebar-header p {
    font-size: 13px;
    color: var(--mss-text-muted);
    margin: 0;
}

.mss-sidebar-progress {
    padding: 16px 20px;
    border-bottom: 1px solid var(--mss-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.mss-sidebar-progress-track {
    flex: 1;
    height: 6px;
    background: var(--mss-bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.mss-sidebar-progress-fill {
    height: 100%;
    background: var(--mss-accent);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.mss-sidebar-progress span {
    font-size: 13px;
    font-weight: 700;
    color: var(--mss-accent);
    white-space: nowrap;
}

/* Module / Topic Groups */
.mss-module {
    border-bottom: 1px solid var(--mss-border);
}

.mss-module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    cursor: pointer;
    transition: background 0.2s;
    user-select: none;
}

.mss-module-header:hover { background: var(--mss-bg-tertiary); }

.mss-module-header h3 {
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--mss-text-secondary);
    margin: 0;
}

.mss-module-header .mss-chevron {
    color: var(--mss-text-muted);
    transition: transform 0.2s;
    font-size: 12px;
}

.mss-module.expanded .mss-chevron { transform: rotate(180deg); }

.mss-module-lessons {
    display: none;
    padding-bottom: 8px;
}

.mss-module.expanded .mss-module-lessons { display: block; }

/* Lesson Items */
.mss-lesson-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 20px 10px 28px;
    cursor: pointer;
    transition: background 0.2s;
    position: relative;
    text-decoration: none;
    color: var(--mss-text-primary);
}

.mss-lesson-item:hover {
    background: var(--mss-bg-tertiary);
    text-decoration: none;
    color: var(--mss-text-primary);
}

.mss-lesson-item.active {
    background: var(--mss-bg-tertiary);
    border-left: 3px solid var(--mss-accent);
    padding-left: 25px;
}

.mss-lesson-item.completed .mss-lesson-check {
    background: var(--mss-accent);
    border-color: var(--mss-accent);
    color: var(--mss-bg-primary);
}

.mss-lesson-check {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--mss-border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
    font-size: 11px;
    font-weight: 700;
}

.mss-lesson-info { flex: 1; min-width: 0; }

.mss-lesson-info h4 {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
    margin: 0 0 2px;
    color: var(--mss-text-primary);
}

.mss-lesson-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--mss-text-muted);
}

.mss-type-badge {
    background: var(--mss-bg-primary);
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
}

.mss-type-badge.video { color: var(--mss-accent); }
.mss-type-badge.text { color: #7eb8ff; }
.mss-type-badge.quiz { color: #ff7eb8; }

/* Sidebar Toggle */
.mss-sidebar-toggle {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 901;
    background: var(--mss-accent);
    color: var(--mss-bg-primary);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(200, 255, 0, 0.3);
    transition: transform 0.2s;
}

.mss-sidebar-toggle:hover { transform: scale(1.1); }

@media (min-width: 1024px) {
    .mss-sidebar-toggle { display: none; }
}

/* ========== VIDEO PLAYER ========== */
.mss-video-section {
    background: #000;
    width: 100%;
}

.mss-video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background: #000;
}

.mss-video-container iframe,
.mss-video-container video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.mss-video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #111 0%, #1a1a1a 100%);
    cursor: pointer;
}

.mss-play-btn {
    width: 80px;
    height: 80px;
    background: var(--mss-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    cursor: pointer;
}

.mss-play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 40px rgba(200, 255, 0, 0.4);
}

.mss-play-btn svg {
    width: 32px;
    height: 32px;
    fill: var(--mss-bg-primary);
    margin-left: 4px;
}

.mss-video-placeholder p {
    font-size: 14px;
    color: var(--mss-text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0;
}

/* ========== LESSON CONTENT ========== */
.mss-lesson-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 32px 24px 80px;
    animation: mssFadeIn 0.4s ease;
}

@media (min-width: 768px) {
    .mss-lesson-content { padding: 40px 40px 80px; }
}

@keyframes mssFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.mss-lesson-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--mss-border);
}

.mss-lesson-breadcrumb {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--mss-accent);
    font-weight: 700;
    margin-bottom: 8px;
}

.mss-lesson-header h1 {
    font-size: 28px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.2;
    margin-bottom: 12px;
    color: var(--mss-text-primary);
}

@media (min-width: 768px) {
    .mss-lesson-header h1 { font-size: 36px; }
}

.mss-lesson-header-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 14px;
    color: var(--mss-text-secondary);
}

.mss-lesson-header-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ========== TABS ========== */
.mss-content-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--mss-border);
    margin-bottom: 32px;
    overflow-x: auto;
}

.mss-tab-btn {
    background: none;
    border: none;
    color: var(--mss-text-muted);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 12px 20px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.2s, border-color 0.2s;
    white-space: nowrap;
}

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

.mss-tab-btn.active {
    color: var(--mss-accent);
    border-bottom-color: var(--mss-accent);
}

.mss-tab-content { display: none; }
.mss-tab-content.active { display: block; }

/* ========== TRANSCRIPT ========== */
.mss-transcript {
    font-size: 16px;
    line-height: 1.8;
    color: var(--mss-text-secondary);
}

.mss-transcript p { margin-bottom: 20px; }

.mss-transcript h2 {
    font-size: 22px;
    font-weight: 800;
    color: var(--mss-text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 40px 0 16px;
}

.mss-transcript h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--mss-text-primary);
    margin: 32px 0 12px;
}

.mss-transcript ul, .mss-transcript ol {
    margin: 16px 0;
    padding-left: 24px;
}

.mss-transcript li {
    margin-bottom: 8px;
    color: var(--mss-text-secondary);
}

.mss-transcript .timestamp {
    display: inline-block;
    background: var(--mss-bg-tertiary);
    color: var(--mss-accent);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    font-family: monospace;
    cursor: pointer;
    margin-right: 4px;
    transition: background 0.2s;
}

.mss-transcript .timestamp:hover { background: var(--mss-border); }

.mss-transcript .highlight-box {
    background: var(--mss-bg-tertiary);
    border-left: 3px solid var(--mss-accent);
    padding: 16px 20px;
    margin: 24px 0;
    border-radius: 0 6px 6px 0;
}

.mss-transcript .highlight-box strong {
    color: var(--mss-accent);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 1px;
    display: block;
    margin-bottom: 6px;
}

/* ========== NOTES ========== */
.mss-notes-area {
    width: 100%;
    min-height: 200px;
    background: var(--mss-bg-tertiary);
    border: 1px solid var(--mss-border);
    border-radius: 6px;
    padding: 16px;
    color: var(--mss-text-primary);
    font-size: 15px;
    font-family: inherit;
    line-height: 1.6;
    resize: vertical;
}

.mss-notes-area:focus {
    outline: none;
    border-color: var(--mss-accent);
}

.mss-notes-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.mss-notes-header p {
    font-size: 13px;
    color: var(--mss-text-muted);
    margin: 0;
}

.mss-notes-status {
    font-size: 12px;
    color: var(--mss-text-muted);
    margin-top: 8px;
    min-height: 20px;
}

.mss-notes-status.saved { color: var(--mss-accent); }
.mss-notes-status.error { color: #ff7eb8; }

/* ========== RESOURCES ========== */
.mss-resource-list { list-style: none; padding: 0; margin: 0; }

.mss-resource-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--mss-bg-tertiary);
    border: 1px solid var(--mss-border);
    border-radius: 6px;
    margin-bottom: 12px;
    transition: border-color 0.2s;
}

.mss-resource-item:hover { border-color: var(--mss-accent); }

.mss-resource-icon {
    width: 44px;
    height: 44px;
    background: var(--mss-bg-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.mss-resource-info h4 { font-size: 15px; font-weight: 600; margin: 0 0 2px; color: var(--mss-text-primary); }
.mss-resource-info p { font-size: 13px; color: var(--mss-text-muted); margin: 0; }

.mss-resource-download {
    margin-left: auto;
    color: var(--mss-accent);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    white-space: nowrap;
}

.mss-resource-download:hover { color: var(--mss-accent-dim); text-decoration: none; }

/* ========== DISCUSSION ========== */
.mss-discussion-wrap .tutor-qna-wrap { background: transparent; color: var(--mss-text-primary); }

.mss-discussion-wrap .tutor-qna-wrap .tutor-qna-single {
    background: var(--mss-bg-tertiary);
    border: 1px solid var(--mss-border);
    border-radius: 6px;
    margin-bottom: 12px;
    padding: 16px;
}

.mss-discussion-wrap .tutor-qna-wrap input,
.mss-discussion-wrap .tutor-qna-wrap textarea {
    background: var(--mss-bg-tertiary);
    border: 1px solid var(--mss-border);
    color: var(--mss-text-primary);
    border-radius: 6px;
    padding: 12px;
}

.mss-discussion-wrap .tutor-qna-wrap input:focus,
.mss-discussion-wrap .tutor-qna-wrap textarea:focus {
    border-color: var(--mss-accent);
    outline: none;
}

/* ========== BUTTONS ========== */
.mss-btn-save {
    background: var(--mss-accent);
    color: var(--mss-bg-primary);
    border: none;
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.mss-btn-save:hover { opacity: 0.85; }

.mss-btn-complete {
    background: var(--mss-accent);
    color: var(--mss-bg-primary);
    border: none;
    padding: 14px 40px;
    font-size: 14px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.2s;
    display: inline-block;
    text-decoration: none;
}

.mss-btn-complete:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    text-decoration: none;
    color: var(--mss-bg-primary);
}

.mss-btn-complete.completed {
    background: transparent;
    border: 2px solid var(--mss-accent);
    color: var(--mss-accent);
}

.mss-complete-section { text-align: center; margin-top: 32px; }

/* ========== LESSON NAV ========== */
.mss-lesson-nav {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 16px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--mss-border);
}

.mss-nav-prev, .mss-nav-next {
    flex: 1;
    padding: 16px 20px;
    background: var(--mss-bg-tertiary);
    border: 1px solid var(--mss-border);
    border-radius: 6px;
    text-decoration: none;
    color: var(--mss-text-primary);
    transition: border-color 0.2s;
    display: block;
}

.mss-nav-prev:hover, .mss-nav-next:hover {
    border-color: var(--mss-accent);
    text-decoration: none;
    color: var(--mss-text-primary);
}

.mss-nav-next { text-align: right; }

.mss-nav-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--mss-text-muted);
    margin-bottom: 4px;
    font-weight: 700;
}

.mss-nav-title { font-size: 14px; font-weight: 600; }

/* ========== SCROLLBAR ========== */
.mss-sidebar::-webkit-scrollbar { width: 4px; }
.mss-sidebar::-webkit-scrollbar-track { background: transparent; }
.mss-sidebar::-webkit-scrollbar-thumb { background: var(--mss-border); border-radius: 2px; }

/* ========== MOBILE ========== */
@media (max-width: 767px) {
    .mss-lesson-header h1 { font-size: 24px; }
    .mss-lesson-content { padding: 24px 16px 80px; }
    .mss-lesson-nav { flex-direction: column; }
    .mss-nav-next { text-align: left; }
    .mss-play-btn { width: 60px; height: 60px; }
    .mss-play-btn svg { width: 24px; height: 24px; }
    .mss-tab-btn { padding: 10px 14px; font-size: 12px; }
    .mss-transcript { font-size: 15px; }
}