/* ═══════════════════════════════════════════════════════════
   IELTS by Mercy LMS — Main Stylesheet
   ═══════════════════════════════════════════════════════════ */

/* ─── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@600;700&family=DM+Sans:wght@300;400;500;600&display=swap');

/* ─── Brand Tokens ─────────────────────────────────────────── */
:root {
    --red:        #e31837;
    --red-deep:   #b5102a;
    --orange:     #FF6B35;
    --amber:      #FF9500;
    --grad-main:  linear-gradient(135deg, #e31837 0%, #FF6B35 55%, #FF9500 100%);
    --grad-hero:  linear-gradient(140deg, #b5102a 0%, #e31837 30%, #FF6B35 70%, #FF9500 100%);
    --grad-btn:   linear-gradient(135deg, #e31837 0%, #FF6B35 100%);
    --grad-soft:  linear-gradient(135deg, #fff1ee 0%, #fff8f0 100%);
    --navy:       #0d1b2a;
    --navy-mid:   #1e3a5f;
    --text:       #1a1a2e;
    --text-soft:  #5a5a72;
    --border:     #e8e8ef;
    --white:      #ffffff;
    --surface:    #fafafa;
    --card-bg:    #ffffff;
    --input-bg:   #ffffff;
    --admin-bg:   #f2f3f7;
    --success:    #1a9e6b;
    --error-bg:   #fef2f2;
    --error-txt:  #c0392b;
    --radius:     12px;
    --radius-lg:  20px;
    --shadow:     0 4px 24px rgba(227,24,55,0.10);
    --shadow-lg:  0 12px 48px rgba(0,0,0,0.14);
}

body.dark {
    --text:       #f0f0f8;
    --text-soft:  #9898b8;
    --border:     #2e2e44;
    --white:      #1a1a2e;
    --surface:    #13131f;
    --card-bg:    #1e1e30;
    --input-bg:   #252538;
    --admin-bg:   #0f0f1a;
    --grad-soft:  linear-gradient(135deg, #2a1818 0%, #1e1a0e 100%);
    --error-bg:   #2a1010;
    --shadow:     0 4px 24px rgba(0,0,0,0.4);
    --shadow-lg:  0 12px 48px rgba(0,0,0,0.6);
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'DM Sans', sans-serif; background: var(--surface); color: var(--text); min-height: 100vh; transition: background 0.3s, color 0.3s; }
.hidden { display: none !important; }

/* ─── Top Nav ─────────────────────────────────────────────── */
.top-nav { background: var(--white); border-bottom: 2px solid var(--border); padding: 0 32px; height: 64px; display: flex; align-items: center; justify-content: space-between; position: fixed; width: 100%; top: 0; z-index: 1000; box-shadow: 0 2px 16px rgba(0,0,0,0.07); transition: background 0.3s, border-color 0.3s; }
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand-icon { width: 36px; height: 36px; background: var(--grad-btn); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 18px; color: white; font-weight: 700; }
.nav-brand-text { font-family: 'Playfair Display', serif; font-size: 20px; font-weight: 700; background: var(--grad-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-actions { display: flex; gap: 12px; align-items: center; }
.btn-nav { padding: 9px 20px; border: none; border-radius: 8px; font-family: 'DM Sans', sans-serif; font-weight: 600; font-size: 14px; cursor: pointer; transition: all 0.2s; }
.btn-nav-ghost { background: transparent; color: var(--text-soft); border: 1.5px solid var(--border); }
.btn-nav-ghost:hover { border-color: var(--red); color: var(--red); }
.btn-nav-red { background: var(--grad-btn); color: white; box-shadow: 0 3px 12px rgba(227,24,55,0.25); }
.btn-nav-red:hover { opacity: 0.88; transform: translateY(-1px); }

/* ─── Landing ─────────────────────────────────────────────── */
.landing-page { background: var(--surface); min-height: 100vh; }
.hero { background: var(--grad-hero); padding: 120px 32px 80px; text-align: center; color: white; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; width: 500px; height: 500px; background: radial-gradient(circle, rgba(255,255,255,0.15), transparent 60%); top: -200px; right: -200px; border-radius: 50%; }
.hero::after { content: ''; position: absolute; width: 400px; height: 400px; background: radial-gradient(circle, rgba(255,255,255,0.1), transparent 60%); bottom: -150px; left: -100px; border-radius: 50%; }
.hero-content { position: relative; z-index: 2; max-width: 740px; margin: 0 auto; }
.hero-badge { display: inline-block; padding: 8px 18px; background: rgba(255,255,255,0.2); border-radius: 30px; font-size: 14px; font-weight: 600; margin-bottom: 24px; backdrop-filter: blur(12px); }
.hero h1 { font-family: 'Playfair Display', serif; font-size: 56px; font-weight: 700; line-height: 1.15; margin-bottom: 20px; }
.hero h1 span { display: block; font-size: 42px; color: rgba(255,255,255,0.95); margin-top: 8px; }
.hero-desc { font-size: 18px; line-height: 1.7; margin-bottom: 36px; opacity: 0.95; max-width: 620px; margin-left: auto; margin-right: auto; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-hero { padding: 14px 32px; border: none; border-radius: 10px; font-family: 'DM Sans', sans-serif; font-size: 16px; font-weight: 600; cursor: pointer; transition: all 0.25s; }
.btn-hero-white { background: white; color: var(--red); box-shadow: 0 8px 32px rgba(0,0,0,0.16); }
.btn-hero-white:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,0.22); }
.btn-hero-outline { background: transparent; color: white; border: 2px solid rgba(255,255,255,0.4); }
.btn-hero-outline:hover { background: rgba(255,255,255,0.15); border-color: white; }

.intro-video-section { padding: 80px 32px; background: var(--card-bg); }
.intro-video-container { max-width: 900px; margin: 0 auto; }
.intro-video-container h2 { font-family: 'Playfair Display', serif; font-size: 36px; text-align: center; margin-bottom: 16px; color: var(--text); }
.intro-video-container p { text-align: center; font-size: 16px; color: var(--text-soft); margin-bottom: 36px; }
.intro-video-wrapper { position: relative; padding-bottom: 56.25%; background: var(--navy); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.intro-video-wrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }
.intro-video-placeholder { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 16px; color: rgba(255,255,255,0.5); }
.intro-video-placeholder-icon { font-size: 72px; }
.intro-video-placeholder p { font-size: 16px; color: rgba(255,255,255,0.6); margin-bottom: 0; }

.stats-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; padding: 60px 32px; background: var(--card-bg); border-bottom: 1px solid var(--border); }
.stat-item { text-align: center; }
.stat-num { font-family: 'Playfair Display', serif; font-size: 40px; font-weight: 700; background: var(--grad-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 8px; }
.stat-lbl { font-size: 14px; color: var(--text-soft); font-weight: 600; }

.features-section { padding: 80px 32px; background: var(--surface); }
.section-title { font-family: 'Playfair Display', serif; font-size: 40px; text-align: center; color: var(--text); margin-bottom: 12px; }
.section-sub { text-align: center; font-size: 16px; color: var(--text-soft); margin-bottom: 56px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; max-width: 1100px; margin: 0 auto; }
.feature-card { background: var(--card-bg); padding: 32px 28px; border-radius: var(--radius-lg); border: 1.5px solid var(--border); transition: all 0.3s; }
.feature-card:hover { border-color: var(--orange); box-shadow: var(--shadow); transform: translateY(-4px); }
.feature-icon { font-size: 44px; margin-bottom: 20px; }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.feature-card p { color: var(--text-soft); line-height: 1.7; font-size: 15px; }

.cta-section { padding: 80px 32px; background: var(--card-bg); text-align: center; }
.cta-section h2 { font-family: 'Playfair Display', serif; font-size: 36px; margin-bottom: 16px; }
.cta-section p { font-size: 16px; color: var(--text-soft); margin-bottom: 36px; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; background: var(--grad-btn); color: white; border: none; border-radius: 50%; font-size: 20px; cursor: pointer; box-shadow: 0 4px 16px rgba(227,24,55,0.3); transition: all 0.3s; opacity: 0; visibility: hidden; z-index: 999; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(227,24,55,0.4); }

.footer { background: var(--navy); color: rgba(255,255,255,0.8); padding: 60px 32px 40px; text-align: center; }
.footer-brand { font-family: 'Playfair Display', serif; font-size: 28px; color: white; margin-bottom: 16px; }
.footer p { font-size: 15px; line-height: 1.7; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 40px; padding-top: 24px; font-size: 14px; color: rgba(255,255,255,0.6); }
.footer-bottom a { color: rgba(255,255,255,0.4); font-size: 12px; text-decoration: none; transition: color 0.2s; }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* ─── Auth ────────────────────────────────────────────────── */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 40px 20px; background: var(--grad-hero); }
.auth-card { background: var(--card-bg); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden; max-width: 480px; width: 100%; }
.auth-header { padding: 40px 36px 32px; background: var(--grad-soft); text-align: center; }
.auth-back { display: inline-flex; align-items: center; gap: 6px; color: var(--text-soft); font-size: 14px; font-weight: 600; cursor: pointer; margin-bottom: 20px; transition: color 0.2s; background: none; border: none; }
.auth-back:hover { color: var(--red); }
.auth-header h1 { font-family: 'Playfair Display', serif; font-size: 32px; margin-bottom: 8px; color: var(--text); }
.auth-header p { color: var(--text-soft); font-size: 15px; }
.auth-body { padding: 36px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; font-size: 14px; color: var(--text); margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 1.5px solid var(--border); border-radius: 8px; font-family: 'DM Sans', sans-serif; font-size: 14px; transition: border-color 0.2s, background 0.3s, color 0.3s; background: var(--input-bg); color: var(--text); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--orange); }
.form-group textarea { resize: vertical; min-height: 120px; }
.btn-primary { width: 100%; padding: 14px; background: var(--grad-btn); color: white; border: none; border-radius: 8px; font-family: 'DM Sans', sans-serif; font-size: 16px; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.msg-error, .msg-success { padding: 14px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 14px; display: none; }
.msg-error { background: var(--error-bg); color: var(--error-txt); border: 1px solid rgba(192,57,43,0.2); }
.msg-success { background: #f0fdf4; color: var(--success); border: 1px solid rgba(26,158,107,0.2); }

/* ─── Admin Dashboard ─────────────────────────────────────── */
.admin-shell { display: none; min-height: 100vh; padding-top: 64px; background: var(--admin-bg); }
.admin-wrap { max-width: 1400px; margin: 0 auto; padding: 32px 28px; }
.admin-header { background: var(--card-bg); padding: 28px 32px; border-radius: var(--radius-lg); margin-bottom: 28px; border: 1.5px solid var(--border); }
.admin-header h1 { font-family: 'Playfair Display', serif; font-size: 32px; margin-bottom: 8px; }
.admin-header p { font-size: 15px; color: var(--text-soft); }
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-bottom: 28px; }
.stat-box { background: var(--card-bg); border: 1.5px solid var(--border); border-radius: var(--radius-lg); padding: 24px; text-align: center; }
.stat-box-num { font-size: 40px; font-weight: 700; background: var(--grad-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 8px; }
.stat-box-lbl { font-size: 14px; color: var(--text-soft); font-weight: 600; }
.admin-tabs { background: var(--card-bg); padding: 20px 20px 16px; border-radius: var(--radius-lg); border: 1.5px solid var(--border); margin-bottom: 28px; display: flex; gap: 10px; flex-wrap: wrap; }
.admin-tab { padding: 10px 20px; background: var(--surface); border: 1.5px solid transparent; border-radius: 8px; font-family: 'DM Sans', sans-serif; font-size: 14px; font-weight: 600; color: var(--text-soft); cursor: pointer; transition: all 0.2s; }
.admin-tab:hover { background: var(--grad-soft); color: var(--text); }
.admin-tab.active { background: var(--grad-btn); color: white; border-color: transparent; }
.admin-panel { display: none; }
.admin-panel.active { display: block; }
.admin-card { background: var(--card-bg); border: 1.5px solid var(--border); border-radius: var(--radius-lg); padding: 32px; margin-bottom: 28px; }
.admin-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 24px; color: var(--text); }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; margin-bottom: 20px; }
.btn-sm { padding: 8px 16px; border: none; border-radius: 6px; font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 600; cursor: pointer; transition: all 0.2s; margin-right: 6px; }
.btn-sm-blue { background: #3b82f6; color: white; }
.btn-sm-blue:hover { background: #2563eb; }
.btn-sm-red { background: #ef4444; color: white; }
.btn-sm-red:hover { background: #dc2626; }
.btn-sm-green { background: #10b981; color: white; }
.btn-sm-green:hover { background: #059669; }
.data-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
.data-table th, .data-table td { padding: 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.data-table th { background: var(--grad-soft); color: var(--text); font-weight: 600; }
.data-table tr:hover td { background: rgba(255,107,53,0.03); }

/* Course/Module/Video admin tree */
.course-admin-item { background: var(--admin-bg); border: 1.5px solid var(--border); border-radius: var(--radius); margin-bottom: 16px; overflow: hidden; }
.course-admin-header { padding: 16px 20px; display: flex; align-items: center; gap: 12px; background: var(--card-bg); flex-wrap: wrap; }
.course-title-edit { flex: 1; min-width: 140px; padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 6px; font-family: 'DM Sans', sans-serif; font-size: 15px; font-weight: 600; background: var(--input-bg); color: var(--text); }
.course-title-edit:focus { outline: none; border-color: var(--orange); }
.modules-admin-list { padding: 12px 20px 20px; }
.module-admin-item { background: var(--card-bg); border: 1.5px solid var(--border); border-radius: var(--radius); margin-bottom: 12px; padding: 12px 16px; }
.module-admin-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.module-title-edit { flex: 1; min-width: 120px; padding: 6px 10px; border: 1.5px solid var(--border); border-radius: 6px; font-family: 'DM Sans', sans-serif; font-size: 14px; font-weight: 600; background: var(--input-bg); color: var(--text); }
.module-title-edit:focus { outline: none; border-color: var(--orange); }
.videos-admin-list { padding-left: 12px; }
.video-row { display: grid; grid-template-columns: 1fr 2fr auto; gap: 10px; align-items: center; margin-bottom: 8px; }
.video-row input { padding: 7px 10px; border: 1.5px solid var(--border); border-radius: 6px; font-family: 'DM Sans', sans-serif; font-size: 13px; transition: border-color 0.2s; background: var(--input-bg); color: var(--text); }
.video-row input:focus { outline: none; border-color: var(--orange); }
.add-btn { background: none; border: 1.5px dashed var(--border); border-radius: 6px; padding: 10px; font-size: 13px; color: var(--text-soft); cursor: pointer; text-align: center; width: 100%; margin-top: 8px; transition: all 0.2s; font-family: 'DM Sans', sans-serif; }
.add-btn:hover { border-color: var(--orange); color: var(--orange); }

/* Save bar */
.save-changes-bar { display: flex; align-items: center; gap: 16px; padding: 20px 0 4px; border-top: 1.5px solid var(--border); margin-top: 24px; }
.btn-save-changes { padding: 12px 32px; background: var(--grad-btn); color: white; border: none; border-radius: 10px; font-family: 'DM Sans', sans-serif; font-size: 15px; font-weight: 700; cursor: pointer; box-shadow: 0 4px 16px rgba(227,24,55,0.25); transition: all 0.2s; display: flex; align-items: center; gap: 8px; }
.btn-save-changes:hover { opacity: 0.88; transform: translateY(-2px); }
.save-status { font-size: 14px; font-weight: 600; color: var(--success); opacity: 0; transition: opacity 0.4s; }
.save-status.visible { opacity: 1; }
.unsaved-badge { display: inline-block; background: #fef3c7; color: #92400e; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 20px; border: 1px solid #fde68a; }

/* Resources admin */
.resource-admin-item { background: var(--card-bg); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 12px; }
.resource-admin-row { display: grid; grid-template-columns: 60px 1fr 2fr 2fr auto; gap: 12px; align-items: center; }
.resource-admin-row input { padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 6px; font-family: 'DM Sans', sans-serif; font-size: 14px; background: var(--input-bg); color: var(--text); }
.resource-admin-row input:focus { outline: none; border-color: var(--orange); }

/* Security modal */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 9999; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.open { display: flex; }
.modal-box { background: var(--card-bg); border-radius: var(--radius-lg); max-width: 500px; width: 100%; padding: 36px; box-shadow: var(--shadow-lg); position: relative; max-height: 90vh; overflow-y: auto; }
.modal-box.policy-modal { max-width: 720px; }
.policy-modal h2 { font-family: 'Playfair Display', serif; font-size: 26px; margin-bottom: 6px; color: var(--text); }
.policy-modal .policy-date { font-size: 12px; color: var(--text-soft); margin-bottom: 24px; display: block; }
.policy-modal h3 { font-size: 15px; font-weight: 600; color: var(--text); margin: 20px 0 8px; }
.policy-modal p, .policy-modal li { font-size: 14px; color: var(--text-soft); line-height: 1.75; }
.policy-modal ul { padding-left: 20px; margin: 8px 0; }
.policy-modal li { margin-bottom: 4px; }
.modal-close { position: absolute; top: 16px; right: 16px; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text-soft); line-height: 1; }
.modal-close:hover { color: var(--red); }
.modal-box h2 { font-family: 'Playfair Display', serif; font-size: 26px; margin-bottom: 6px; color: var(--text); }
.modal-box > p { color: var(--text-soft); font-size: 14px; margin-bottom: 24px; }
.sec-section { border: 1.5px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.sec-section h4 { font-size: 15px; font-weight: 700; margin-bottom: 14px; color: var(--text); }

/* Cookie consent banner */
.cookie-banner { position: fixed; bottom: 0; left: 0; right: 0; background: var(--navy); color: rgba(255,255,255,0.9); padding: 16px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; z-index: 10000; box-shadow: 0 -4px 24px rgba(0,0,0,0.18); flex-wrap: wrap; }
.cookie-banner p { font-size: 13px; line-height: 1.6; margin: 0; flex: 1; min-width: 200px; }
.cookie-banner a { color: #FF9500; text-decoration: underline; cursor: pointer; }
.cookie-banner-actions { display: flex; gap: 10px; flex-shrink: 0; }
.cookie-btn-accept { background: var(--grad-main); color: white; border: none; border-radius: 8px; padding: 9px 22px; font-size: 13px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.cookie-btn-decline { background: transparent; color: rgba(255,255,255,0.6); border: 1px solid rgba(255,255,255,0.25); border-radius: 8px; padding: 9px 16px; font-size: 13px; cursor: pointer; white-space: nowrap; }
.cookie-btn-decline:hover { color: white; border-color: rgba(255,255,255,0.5); }

/* Admin link at bottom */
.admin-bottom-link { text-align: center; padding: 20px 0 6px; border-top: 1.5px solid var(--border); margin-top: 8px; }
.admin-bottom-link button { background: none; border: none; font-size: 13px; color: var(--text-soft); cursor: pointer; text-decoration: underline; font-family: 'DM Sans', sans-serif; transition: color 0.2s; }
.admin-bottom-link button:hover { color: var(--red); }

/* ─── Student Dashboard ───────────────────────────────────── */
.student-shell { display: none; min-height: 100vh; padding-top: 64px; }
.student-layout { display: flex; min-height: calc(100vh - 64px); }
.sidebar { width: 300px; background: var(--card-bg); border-right: 1.5px solid var(--border); position: fixed; top: 64px; left: 0; height: calc(100vh - 64px); overflow-y: auto; display: flex; flex-direction: column; transition: transform 0.3s ease, background 0.3s; z-index: 100; }
.sidebar-welcome { padding: 20px 20px 16px; border-bottom: 1px solid var(--border); }
.sidebar-welcome-text { font-size: 13px; color: var(--text-soft); margin-bottom: 4px; }
.sidebar-welcome strong { color: var(--text); font-size: 16px; }
.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb:hover { background: var(--orange); }
.nav-section-label { font-size: 10px; font-weight: 700; color: var(--text-soft); text-transform: uppercase; letter-spacing: 0.1em; padding: 12px 10px 8px; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 8px; cursor: pointer; color: var(--text); font-size: 14px; font-weight: 500; transition: all 0.15s; border: 1.5px solid transparent; margin-bottom: 4px; }
.nav-item:hover { background: var(--grad-soft); }
.nav-item.active { background: var(--grad-soft); color: var(--red); font-weight: 600; border-color: rgba(227,24,55,0.15); }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }
.course-tree { padding: 0 8px 12px; }
.module-accordion { margin-bottom: 4px; border-radius: 8px; overflow: hidden; border: 1.5px solid transparent; transition: border-color 0.2s; }
.module-accordion.has-active { border-color: rgba(227,24,55,0.18); }
.module-accordion-header { display: flex; align-items: center; gap: 8px; padding: 9px 12px; cursor: pointer; border-radius: 6px; font-size: 13px; font-weight: 600; color: var(--text); transition: all 0.15s; user-select: none; }
.module-accordion-header:hover { background: var(--grad-soft); }
.module-accordion-header.open { color: var(--red); background: var(--grad-soft); }
.module-chevron { margin-left: auto; font-size: 10px; color: var(--text-soft); transition: transform 0.2s; flex-shrink: 0; }
.module-accordion-header.open .module-chevron { transform: rotate(180deg); }
.lessons-list { display: none; padding: 4px 0 6px 0; }
.lessons-list.open { display: block; }
.lesson-item { display: flex; align-items: center; gap: 8px; padding: 7px 12px 7px 28px; font-size: 12.5px; font-weight: 500; color: var(--text-soft); cursor: pointer; border-radius: 6px; transition: all 0.15s; margin-bottom: 1px; line-height: 1.4; }
.lesson-item:hover { background: var(--grad-soft); color: var(--text); }
.lesson-item.active { color: var(--orange); font-weight: 600; background: #fff8f0; }
.lesson-play-icon { width: 18px; height: 18px; border-radius: 50%; background: var(--border); display: flex; align-items: center; justify-content: center; font-size: 8px; flex-shrink: 0; transition: background 0.15s; }
.lesson-item.active .lesson-play-icon { background: var(--orange); color: white; }
.lesson-item:hover .lesson-play-icon { background: var(--red); color: white; }
.lesson-no-url { opacity: 0.45; cursor: default; }
.lesson-no-url:hover { background: none; color: var(--text-soft); }
.lesson-no-url:hover .lesson-play-icon { background: var(--border); color: inherit; }
.lesson-done-badge { display: none; align-items: center; gap: 3px; margin-left: auto; background: #dcfce7; color: #16a34a; font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 20px; flex-shrink: 0; white-space: nowrap; }
body.dark .lesson-done-badge { background: rgba(22,163,74,0.18); color: #4ade80; }
.lesson-item.completed .lesson-done-badge { display: flex; }
.lesson-item.completed .lesson-play-icon { background: #16a34a; color: white; }
.lesson-item.completed { color: var(--text); }
.lesson-item.completed.active .lesson-play-icon { background: var(--orange); }
.main-area { margin-left: 300px; flex: 1; background: var(--admin-bg); padding: 32px 28px; min-height: calc(100vh - 64px); }
.content-panel { display: none; }
.content-panel.active { display: block; }
.panel-header { background: var(--card-bg); border-radius: var(--radius-lg); padding: 24px 28px; margin-bottom: 24px; border: 1.5px solid var(--border); }
.panel-header h2 { font-family: 'Playfair Display', serif; font-size: 24px; color: var(--text); margin-bottom: 4px; }
.panel-header p { color: var(--text-soft); font-size: 14px; }
.course-progress-wrap { margin-top: 14px; }
.course-progress-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 7px; }
.course-progress-label { font-size: 13px; font-weight: 600; color: var(--text-soft); }
.course-progress-pct { font-size: 14px; font-weight: 700; background: var(--grad-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.course-progress-track { width: 100%; height: 8px; background: var(--border); border-radius: 99px; overflow: hidden; }
.course-progress-fill { height: 100%; background: var(--grad-btn); border-radius: 99px; transition: width 0.5s cubic-bezier(0.4,0,0.2,1); }
.video-player-wrap { background: var(--card-bg); border-radius: var(--radius-lg); border: 1.5px solid var(--border); overflow: hidden; margin-bottom: 20px; }
.video-player-header { padding: 16px 24px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.video-breadcrumb { font-size: 13px; color: var(--text-soft); }
.video-breadcrumb span { color: var(--red); font-weight: 600; }
.video-frame-wrap { position: relative; padding-bottom: 56.25%; background: #0d1b2a; }
.video-frame-wrap iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }
.video-placeholder { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 12px; color: rgba(255,255,255,0.4); }
.video-placeholder-icon { font-size: 56px; }
.video-placeholder p { font-size: 14px; }
.video-info-bar { padding: 20px 24px; border-top: 1px solid var(--border); }
.video-info-bar h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.video-info-bar p { color: var(--text-soft); font-size: 14px; line-height: 1.6; }
.video-nav-row { display: flex; gap: 12px; margin-top: 16px; }
.btn-vid { flex: 1; padding: 11px 18px; border: 1.5px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.btn-vid:hover:not(:disabled) { border-color: var(--orange); color: var(--orange); }
.btn-vid-next { background: var(--grad-btn); color: white; border-color: transparent; }
.btn-vid-next:hover:not(:disabled) { opacity: 0.85; }
.btn-vid:disabled { opacity: 0.4; cursor: default; }
.res-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
.res-card { background: var(--card-bg); border-radius: var(--radius-lg); border: 1.5px solid var(--border); padding: 24px; transition: all 0.2s; }
.res-card:hover { border-color: var(--orange); box-shadow: var(--shadow); transform: translateY(-3px); }
.res-icon { font-size: 32px; margin-bottom: 14px; }
.res-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.res-card p { font-size: 13px; color: var(--text-soft); line-height: 1.6; margin-bottom: 16px; }
.btn-res { display: inline-block; padding: 9px 18px; background: var(--grad-btn); color: white; border: none; border-radius: 7px; font-family: 'DM Sans', sans-serif; font-size: 13px; font-weight: 600; cursor: pointer; }
.btn-res:hover { opacity: 0.88; }
.contact-wrap { max-width: 640px; }
.contact-card { background: var(--card-bg); border-radius: var(--radius-lg); border: 1.5px solid var(--border); padding: 32px; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--orange); }

/* Dark toggle */
.landing-theme-btn { position: fixed; top: 12px; right: 16px; z-index: 2000; display: flex; align-items: center; gap: 7px; padding: 7px 14px 7px 10px; border: 1.5px solid rgba(255,255,255,0.45); border-radius: 30px; background: rgba(255,255,255,0.18); backdrop-filter: blur(10px); color: white; font-size: 13px; font-weight: 600; cursor: pointer; transition: all 0.2s; white-space: nowrap; }
.landing-theme-btn .toggle-icon { font-size: 16px; line-height: 1; }
body.dark .landing-theme-btn { border-color: var(--border); background: var(--card-bg); color: var(--text); backdrop-filter: none; }
.landing-theme-btn:hover { transform: scale(1.05); }
.dark-toggle-pill { display: flex; align-items: center; gap: 7px; padding: 6px 14px 6px 10px; border: 1.5px solid var(--border); border-radius: 30px; background: var(--surface); color: var(--text); font-size: 13px; font-weight: 600; cursor: pointer; transition: all 0.2s; flex-shrink: 0; white-space: nowrap; }
.dark-toggle-pill:hover { border-color: var(--orange); color: var(--orange); }
.dark-toggle-pill .toggle-icon { font-size: 16px; line-height: 1; }
.dark-toggle-pill .toggle-label { font-size: 12px; font-weight: 600; }

/* Impersonation banner */
#impersonationBanner { background: #f59e0b; color: #1a1a1a; padding: 8px 20px; font-size: 13px; font-weight: 500; align-items: center; justify-content: space-between; gap: 12px; }

/* Mobile */
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; backdrop-filter: blur(2px); }
.sidebar-overlay.open { display: block; }
.mobile-menu-btn { display: none; width: 40px; height: 40px; border: 1.5px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); font-size: 20px; cursor: pointer; align-items: center; justify-content: center; flex-shrink: 0; flex-direction: column; gap: 5px; padding: 9px 8px; transition: all 0.2s; }
.mobile-menu-btn:hover { border-color: var(--orange); }
.hamburger-line { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s ease; transform-origin: center; }
.mobile-menu-btn.is-open .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.is-open .hamburger-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.mobile-menu-btn.is-open .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
    .resource-admin-row { grid-template-columns: 50px 1fr 1fr; gap: 8px; }
}
@media (max-width: 768px) {
    .top-nav { padding: 0 16px; }
    .btn-nav-ghost { display: none; }
    .mobile-menu-btn { display: flex; }
    .nav-brand-text { display: none; }
    .nav-brand-icon { display: none; }
    .dark-toggle-pill .toggle-label { display: none; }
    .hero { padding: 100px 20px 60px; }
    .hero h1 { font-size: 36px; }
    .hero h1 span { font-size: 26px; }
    .hero-desc { font-size: 15px; }
    .btn-hero { padding: 12px 22px; font-size: 14px; }
    .intro-video-section { padding: 48px 16px; }
    .intro-video-container h2 { font-size: 26px; }
    .stats-strip { padding: 40px 16px; gap: 20px; }
    .stat-num { font-size: 30px; }
    .features-section { padding: 48px 16px; }
    .section-title { font-size: 28px; }
    .features-grid { grid-template-columns: 1fr; gap: 16px; }
    .feature-card { padding: 24px 20px; }
    .cta-section { padding: 48px 16px; }
    .cta-section h2 { font-size: 26px; }
    .footer { padding: 40px 20px 28px; }
    .footer-brand { font-size: 22px; }
    .auth-header { padding: 28px 20px 24px; }
    .auth-body { padding: 24px 20px; }
    .auth-header h1 { font-size: 26px; }
    .admin-wrap { padding: 16px 12px; }
    .admin-header { padding: 20px 16px; }
    .admin-header h1 { font-size: 24px; }
    .admin-card { padding: 20px 16px; }
    .stats-row { grid-template-columns: 1fr 1fr; gap: 12px; }
    .stat-box { padding: 16px 12px; }
    .stat-box-num { font-size: 28px; }
    .admin-tabs { padding: 12px 12px 10px; gap: 8px; }
    .admin-tab { padding: 8px 14px; font-size: 13px; }
    .data-table { font-size: 12px; }
    .data-table th, .data-table td { padding: 10px 8px; }
    .form-row { grid-template-columns: 1fr; }
    .video-row { grid-template-columns: 1fr; }
    .resource-admin-row { grid-template-columns: 1fr; }
    .sidebar { transform: translateX(-100%); z-index: 200; width: 280px; }
    .sidebar.open { transform: translateX(0); }
    .main-area { margin-left: 0; padding: 16px 12px; }
    .panel-header { padding: 18px 16px; }
    .panel-header h2 { font-size: 20px; }
    .video-player-header { padding: 12px 16px; }
    .video-info-bar { padding: 16px; }
    .video-info-bar h3 { font-size: 16px; }
    .video-nav-row { gap: 8px; }
    .btn-vid { padding: 10px 12px; font-size: 13px; }
    .res-grid { grid-template-columns: 1fr; }
    .contact-card { padding: 20px 16px; }
}