/* ═══════════════════════════════════════════════════════
   SUPER PRODUCER SELF — COURSE STYLES
   Platinum Producer Blueprint & All Courses
   ═══════════════════════════════════════════════════════ */

:root {
    --gold: #c9a84c;
    --gold-light: #e8c96a;
    --dark: #0b0e14;
    --dark2: #13171f;
    --dark3: #1a1f2b;
    --ivory: #f0ece0;
    --silver: #9aa0ad;
    --stone: #6b7280;
    --red: #e53e3e;
    --green: #38a169;
    --font-head: 'Anton', sans-serif;
    --font-sub: 'Oswald', sans-serif;
    --font-body: 'Lato', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--dark);
    color: var(--ivory);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
}

a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-light); }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.gold { color: var(--gold); }
.gold-text { color: var(--gold); }
.red { color: var(--red); }

/* ─── COURSE NAV ──────────────────────────────────────── */
.course-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11,14,20,0.97);
    border-bottom: 1px solid rgba(201,168,76,0.2);
    backdrop-filter: blur(12px);
}
.cn-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.cn-logo img { height: 36px; }
.cn-course-title {
    font-family: var(--font-sub);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--gold);
    text-transform: uppercase;
    flex: 1;
    text-align: center;
}
.cn-back {
    font-family: var(--font-sub);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--silver);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s;
}
.cn-back:hover { color: var(--gold); }

/* ─── PROGRESS BAR ───────────────────────────────────── */
.progress-bar-wrap {
    height: 3px;
    background: rgba(255,255,255,0.07);
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--gold), var(--gold-light));
    transition: width 0.5s ease;
}

/* ─── LESSON HERO ────────────────────────────────────── */
.lesson-hero {
    padding: 80px 24px 60px;
    text-align: center;
    background: linear-gradient(180deg, #0d1018 0%, var(--dark) 100%);
    border-bottom: 1px solid rgba(201,168,76,0.12);
}
.lh-badge {
    display: inline-block;
    background: rgba(201,168,76,0.12);
    border: 1px solid rgba(201,168,76,0.3);
    color: var(--gold);
    font-family: var(--font-sub);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    padding: 6px 18px;
    margin-bottom: 24px;
}
.lesson-hero h1 {
    font-family: var(--font-head);
    font-size: clamp(2.5rem, 7vw, 5rem);
    letter-spacing: 4px;
    line-height: 1;
    text-transform: uppercase;
    color: var(--ivory);
    margin-bottom: 20px;
}
.lh-sub {
    font-size: 1.05rem;
    color: var(--silver);
    max-width: 640px;
    margin: 0 auto 28px;
    line-height: 1.7;
}
.lh-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}
.lh-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--stone);
    font-family: var(--font-sub);
    font-weight: 500;
    letter-spacing: 1px;
}
.lh-meta span i { color: var(--gold); }

/* ─── AVATAR SECTION ─────────────────────────────────── */
.avatar-section {
    padding: 48px 0;
    background: var(--dark2);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.avatar-wrap { max-width: 860px; margin: 0 auto; }
.avatar-screen {
    background: #0a0c10;
    border: 1px solid rgba(201,168,76,0.2);
    position: relative;
    width: 100%;
    overflow: hidden;
    -webkit-overflow-scrolling: touch;
    border-radius: 12px;
    -webkit-border-radius: 12px;
    /* height driven by content — iframe wrapper handles aspect ratio */
}
/* Live video embed inside avatar-screen */
.avatar-screen iframe,
.avatar-screen .video-embed-wrap {
    display: block;
    width: 100%;
}
.avatar-screen > div {
    width: 100%;
}
/* Safari iOS iframe fix */
.video-embed-wrap {
    position: relative !important;
    padding-bottom: 56.25% !important;
    height: 0 !important;
    overflow: hidden !important;
    -webkit-overflow-scrolling: touch;
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    background: #0a0c10;
    border-radius: 12px;
    margin-bottom: 24px;
}
.video-embed-wrap iframe {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border: 0 !important;
    display: block !important;
}
.avatar-placeholder {
    text-align: center;
    padding: 40px;
}
.avatar-icon i {
    font-size: 4rem;
    color: rgba(201,168,76,0.3);
    display: block;
    margin-bottom: 20px;
}
.avatar-placeholder h3 {
    font-family: var(--font-sub);
    font-size: 1.3rem;
    color: var(--ivory);
    margin-bottom: 10px;
}
.avatar-placeholder p {
    color: var(--silver);
    font-size: 0.9rem;
    max-width: 360px;
    margin: 0 auto 24px;
}
.btn-play {
    background: var(--gold);
    color: #000;
    border: none;
    padding: 14px 32px;
    font-family: var(--font-sub);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}
.btn-play:hover { background: var(--gold-light); transform: scale(1.02); }
.coming-badge {
    display: inline-block;
    background: rgba(201,168,76,0.1);
    color: var(--gold);
    font-size: 0.75rem;
    font-family: var(--font-sub);
    letter-spacing: 1px;
    padding: 4px 12px;
    border: 1px solid rgba(201,168,76,0.2);
}
.avatar-controls {
    margin-top: 16px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 14px 20px;
}
.ac-info {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.82rem;
    color: var(--stone);
}
.ac-info i { color: var(--gold); margin-top: 2px; flex-shrink: 0; }

/* ─── LESSON MAIN ────────────────────────────────────── */
.lesson-main { padding: 60px 0 80px; }
.lesson-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 48px;
    align-items: start;
}

/* ─── LESSON BLOCKS ──────────────────────────────────── */
.lesson-block {
    margin-bottom: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.lesson-block:last-of-type { border-bottom: none; }
.lb-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 28px;
}
.lb-num {
    background: var(--gold);
    color: #000;
    font-family: var(--font-head);
    font-size: 0.9rem;
    padding: 4px 10px;
    flex-shrink: 0;
    margin-top: 4px;
}
.lb-header h2 {
    font-family: var(--font-sub);
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 700;
    color: var(--ivory);
    letter-spacing: 1px;
    text-transform: uppercase;
    line-height: 1.2;
}
.lb-body p {
    color: var(--silver);
    font-size: 1rem;
    line-height: 1.85;
    margin-bottom: 20px;
}
.lb-body h3 {
    font-family: var(--font-sub);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gold);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin: 32px 0 18px;
}
.lb-body h4 {
    font-family: var(--font-sub);
    font-size: 1rem;
    font-weight: 600;
    color: var(--ivory);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.lb-body strong { color: var(--ivory); }

/* QUOTE BLOCK */
.quote-block {
    background: rgba(201,168,76,0.05);
    border-left: 3px solid var(--gold);
    padding: 24px 28px;
    margin: 28px 0;
    position: relative;
}
.quote-block i {
    color: var(--gold);
    font-size: 1.2rem;
    margin-bottom: 12px;
    display: block;
}
.quote-block p {
    font-size: 1.05rem !important;
    font-style: italic;
    color: var(--ivory) !important;
    margin-bottom: 10px !important;
}
.quote-block span {
    font-family: var(--font-sub);
    font-size: 0.78rem;
    color: var(--gold);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* TIP BLOCK */
.tip-block {
    background: rgba(201,168,76,0.07);
    border: 1px solid rgba(201,168,76,0.2);
    padding: 20px 24px;
    display: flex;
    gap: 16px;
    margin: 24px 0;
}
.tip-icon {
    font-size: 1.4rem;
    color: var(--gold);
    flex-shrink: 0;
    margin-top: 2px;
}
.tip-content h4 {
    color: var(--gold) !important;
    font-size: 0.85rem !important;
    letter-spacing: 2px;
    margin-bottom: 6px !important;
}
.tip-content p { color: var(--silver); font-size: 0.9rem; margin-bottom: 0 !important; line-height: 1.7; }

/* LESSON LIST */
.lesson-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 16px 0;
}
.lesson-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--silver);
    font-size: 0.95rem;
}
.lesson-list li i { margin-top: 3px; flex-shrink: 0; }
.lesson-list li i.fa-check-circle { color: var(--green); }
.lesson-list li i.fa-times-circle { color: var(--red); }

/* LEVELS GRID */
.levels-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 16px;
    margin: 20px 0;
}
.level-card {
    padding: 20px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.06);
}
.level-card.level-3 {
    border-color: rgba(201,168,76,0.4);
    background: rgba(201,168,76,0.04);
}
.lc-num {
    font-family: var(--font-sub);
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--stone);
    text-transform: uppercase;
    margin-bottom: 8px;
}
.level-card h4 {
    font-family: var(--font-sub);
    font-size: 1rem;
    color: var(--ivory);
    margin-bottom: 8px;
}
.level-card p { font-size: 0.82rem; color: var(--stone); line-height: 1.6; margin-bottom: 12px; }
.lc-result {
    font-size: 0.78rem;
    font-family: var(--font-sub);
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--red);
    text-transform: uppercase;
}
.lc-result.gold-text { color: var(--gold); }

/* MINDSET SHIFTS */
.mindset-shifts { display: flex; flex-direction: column; gap: 12px; margin: 20px 0; }
.ms-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.02);
    padding: 12px 16px;
    border: 1px solid rgba(255,255,255,0.05);
}
.ms-old {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--stone);
}
.ms-old i { color: var(--red); flex-shrink: 0; }
.ms-arrow { color: var(--gold); font-size: 0.9rem; }
.ms-new {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--ivory);
    font-weight: 600;
}
.ms-new i { color: var(--green); flex-shrink: 0; }

/* IDENTITY GRID */
.identity-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0;
}
.identity-card {
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 24px;
    text-align: center;
}
.identity-card i { font-size: 1.6rem; color: var(--gold); margin-bottom: 12px; display: block; }
.identity-card h4 { font-family: var(--font-sub); font-size: 0.9rem; color: var(--ivory); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; }
.identity-card p { font-size: 0.85rem; color: var(--stone); line-height: 1.6; }

/* HABITS LIST */
.habits-list { display: flex; flex-direction: column; gap: 20px; margin: 20px 0; }
.habit-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.05);
    border-left: 3px solid var(--gold);
}
.habit-num {
    font-family: var(--font-head);
    font-size: 1.8rem;
    color: rgba(201,168,76,0.2);
    flex-shrink: 0;
    line-height: 1;
    min-width: 36px;
}
.habit-text h4 { font-family: var(--font-sub); font-size: 0.95rem; color: var(--ivory); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 6px; }
.habit-text p { font-size: 0.88rem; color: var(--stone); line-height: 1.7; margin: 0; }

/* EXERCISE BLOCK */
.exercise-block {
    background: var(--dark2);
    border: 1px solid rgba(201,168,76,0.3);
    padding: 40px;
    margin: 48px 0;
    position: relative;
}
.exercise-block::before {
    content: 'EXERCISE';
    position: absolute;
    top: -12px;
    left: 24px;
    background: var(--gold);
    color: #000;
    font-family: var(--font-sub);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 3px;
    padding: 3px 12px;
}
.ex-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}
.ex-header i { font-size: 1.4rem; color: var(--gold); }
.ex-header h2 { font-family: var(--font-sub); font-size: 1.15rem; color: var(--ivory); letter-spacing: 2px; text-transform: uppercase; }
.ex-body p { color: var(--silver); font-size: 0.95rem; margin-bottom: 20px; }
.ex-template, .ex-example {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.07);
    padding: 20px 24px;
    margin-bottom: 20px;
}
.ex-template h4, .ex-example h4 {
    font-family: var(--font-sub);
    font-size: 0.75rem;
    color: var(--gold);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}
.ex-template p, .ex-example p {
    font-size: 0.9rem;
    color: var(--silver);
    line-height: 1.7;
    margin: 0;
}
.ex-template strong { color: var(--ivory); }
.ex-note { font-size: 0.82rem !important; color: var(--stone) !important; display: flex; align-items: flex-start; gap: 8px; }
.ex-note i { color: var(--gold); margin-top: 2px; }

/* LESSON NAV BUTTONS */
.lesson-nav-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 40px 0 0;
    border-top: 1px solid rgba(255,255,255,0.06);
    margin-top: 20px;
}
.lnb-disabled {
    font-family: var(--font-sub);
    font-size: 0.82rem;
    color: var(--stone);
    letter-spacing: 1px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 8px;
}
.btn-next {
    background: var(--gold);
    color: #000;
    font-family: var(--font-sub);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 14px 24px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s, transform 0.15s;
}
.btn-next:hover { background: var(--gold-light); color: #000; transform: translateX(3px); }
.btn-prev {
    background: transparent;
    color: var(--ivory);
    border: 1px solid rgba(255,255,255,0.15);
    font-family: var(--font-sub);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 14px 24px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: border-color 0.2s, color 0.2s;
}
.btn-prev:hover { border-color: var(--gold); color: var(--gold); }

/* ─── SIDEBAR ────────────────────────────────────────── */
.lesson-sidebar { position: sticky; top: 80px; display: flex; flex-direction: column; gap: 20px; }
.sidebar-card {
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.07);
    padding: 24px;
}
.sidebar-card h3 {
    font-family: var(--font-sub);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-card p { font-size: 0.85rem; color: var(--stone); line-height: 1.7; margin-bottom: 14px; }
.sidebar-card.highlight-card { border-color: rgba(201,168,76,0.3); background: rgba(201,168,76,0.04); }

/* MODULE LIST */
.module-list { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.module-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    font-size: 0.82rem;
    color: var(--stone);
    border-radius: 2px;
    transition: background 0.15s;
}
.module-list li a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--stone);
    width: 100%;
    padding: 8px 10px;
    transition: color 0.15s, background 0.15s;
}
.module-list li a:hover { color: var(--ivory); background: rgba(255,255,255,0.04); }
.ml-num {
    background: rgba(255,255,255,0.06);
    color: var(--stone);
    font-family: var(--font-sub);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    flex-shrink: 0;
    min-width: 28px;
    text-align: center;
}
.ml-active {
    background: rgba(201,168,76,0.08) !important;
    color: var(--ivory) !important;
    font-weight: 600;
}
.ml-active .ml-num { background: var(--gold); color: #000; }
.ml-badge {
    margin-left: auto;
    font-family: var(--font-sub);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 2px 7px;
    text-transform: uppercase;
}
.ml-badge.current { background: var(--gold); color: #000; }
.ml-badge.done { background: var(--green); color: #fff; }

/* AVATAR STEPS */
.avatar-steps {
    list-style: none;
    counter-reset: step;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}
.avatar-steps li {
    counter-increment: step;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    color: var(--silver);
}
.avatar-steps li::before {
    content: counter(step);
    background: var(--gold);
    color: #000;
    font-family: var(--font-sub);
    font-weight: 700;
    font-size: 0.7rem;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.btn-sidebar {
    display: block;
    text-align: center;
    background: transparent;
    border: 1px solid rgba(201,168,76,0.3);
    color: var(--gold);
    font-family: var(--font-sub);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 10px;
    transition: background 0.2s, border-color 0.2s;
}
.btn-sidebar:hover { background: rgba(201,168,76,0.1); border-color: var(--gold); color: var(--gold); }

/* EARN LIST */
.earn-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.earn-list li { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; color: var(--silver); }
.earn-list li i { color: var(--gold); font-size: 0.85rem; flex-shrink: 0; }

/* ─── COURSE FOOTER ──────────────────────────────────── */
.course-footer {
    background: #080a0e;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 24px;
    text-align: center;
}
.course-footer p { font-size: 0.8rem; color: var(--stone); }
.course-footer a { color: var(--gold); }

/* ─── KEY POINTS / STATS BLOCKS ──────────────────────── */
.key-points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 24px 0;
}
.key-point {
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.06);
    border-top: 3px solid var(--gold);
    padding: 20px;
    text-align: center;
}
.key-point i { font-size: 1.5rem; color: var(--gold); margin-bottom: 10px; display: block; }
.key-point h4 { font-family: var(--font-sub); font-size: 0.85rem; color: var(--ivory); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 6px; }
.key-point p { font-size: 0.82rem; color: var(--stone); margin: 0; }

/* NUMBERED STEPS */
.numbered-steps { display: flex; flex-direction: column; gap: 16px; margin: 20px 0; }
.ns-item {
    display: flex;
    gap: 20px;
    padding: 20px 24px;
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.05);
}
.ns-num {
    font-family: var(--font-head);
    font-size: 2rem;
    color: rgba(201,168,76,0.15);
    line-height: 1;
    flex-shrink: 0;
    min-width: 32px;
}
.ns-text h4 { font-family: var(--font-sub); font-size: 0.9rem; color: var(--ivory); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 6px; }
.ns-text p { font-size: 0.88rem; color: var(--stone); line-height: 1.7; margin: 0; }

/* TWO-COL */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 20px 0; }
.two-col-card {
    background: var(--dark2);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 24px;
}
.two-col-card h4 { font-family: var(--font-sub); font-size: 0.88rem; color: var(--gold); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 12px; }
.two-col-card ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.two-col-card ul li { font-size: 0.85rem; color: var(--stone); display: flex; align-items: flex-start; gap: 8px; }
.two-col-card ul li::before { content: '→'; color: var(--gold); flex-shrink: 0; }

/* STAT BLOCKS */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 16px; margin: 24px 0; }
.stat-card { text-align: center; padding: 20px; background: var(--dark2); border: 1px solid rgba(201,168,76,0.15); }
.stat-num { font-family: var(--font-head); font-size: 2.2rem; color: var(--gold); line-height: 1; margin-bottom: 6px; }
.stat-label { font-family: var(--font-sub); font-size: 0.7rem; color: var(--stone); letter-spacing: 2px; text-transform: uppercase; }

/* ─── RESPONSIVE ─────────────────────────────────────── */
@media (max-width: 900px) {
    .lesson-grid { grid-template-columns: 1fr; }
    .lesson-sidebar { position: static; }
    .levels-grid { grid-template-columns: 1fr; }
    .identity-grid { grid-template-columns: 1fr; }
    .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .cn-course-title { display: none; }
    .lesson-hero { padding: 60px 16px 40px; }
    .lesson-main { padding: 40px 0 60px; }
    .exercise-block { padding: 28px 20px; }
    .ms-row { grid-template-columns: 1fr; gap: 6px; }
    .ms-arrow { display: none; }
    .lh-meta { gap: 12px; }
    .lesson-nav-buttons { flex-direction: column; gap: 12px; }
    .btn-next, .btn-prev { width: 100%; justify-content: center; }
}