/* ============================================================
   ANSUZ ACADEMY — Curso de Excel
   Design System: Gold + Deep Purple | Playfair + Inter
   ============================================================ */

/* ---- 1. DESIGN TOKENS ---- */
:root {
  --gold-50: #fdf8e8;
  --gold-100: #faf0cc;
  --gold-200: #f5dfa0;
  --gold-300: #f0cf74;
  --gold-400: #ebc048;
  --gold-500: #d4a843;
  --gold-600: #c9952a;
  --gold-700: #a67a22;
  --gold-800: #83601b;
  --gold-900: #604614;
  --gold-950: #3d2b0d;

  --purple-50: #f5f0ff;
  --purple-100: #ede5ff;
  --purple-200: #ddd0ff;
  --purple-300: #c4abff;
  --purple-400: #a882ff;
  --purple-500: #8b5cf6;
  --purple-600: #7c3aed;
  --purple-700: #6d28d9;
  --purple-800: #5b21b6;
  --purple-900: #4c1d95;
  --purple-950: #2e1065;

  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --header-h: 64px;
}

/* ---- LIGHT ---- */
[data-theme="light"] {
  --bg: #faf8f5;
  --bg-secondary: #f5f0eb;
  --bg-tertiary: #ede5db;
  --text: #1a1428;
  --text-secondary: #5a4d6b;
  --text-tertiary: #9a8baa;
  --border: #e0d8d0;
  --border-strong: #d0c4b8;
  --card-bg: #fff;
  --card-shadow: 0 1px 3px rgba(45,10,82,0.06), 0 8px 24px rgba(45,10,82,0.04);
  --card-hover-shadow: 0 6px 20px rgba(45,10,82,0.1), 0 16px 48px rgba(45,10,82,0.06);
  --header-bg: rgba(26,6,48,0.97);
  --nav-blur-bg: rgba(255,255,255,0.78);
  --code-bg: #f0ebe5;
  --hero-from: #1a0630;
  --hero-via: #3d1a70;
  --hero-to: #6d28d9;
  --glow: rgba(212,168,67,0.15);
  --badge-bg: #f0ebe5;
  --badge-text: #5a4d6b;
  --scrollbar-track: #e8e0d8;
  --scrollbar-thumb: #c4b8a8;
  --gold-glow: rgba(212,168,67,0.2);
}

/* ---- DARK ---- */
[data-theme="dark"] {
  --bg: #0d041f;
  --bg-secondary: #150a2e;
  --bg-tertiary: #1e1040;
  --text: #ede5db;
  --text-secondary: #b0a0c0;
  --text-tertiary: #7a6a8a;
  --border: #2a1a45;
  --border-strong: #3d2a5a;
  --card-bg: #150a2e;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.5), 0 8px 24px rgba(0,0,0,0.3);
  --card-hover-shadow: 0 6px 20px rgba(0,0,0,0.6), 0 16px 48px rgba(0,0,0,0.4);
  --header-bg: rgba(8,2,18,0.97);
  --nav-blur-bg: rgba(13,4,31,0.85);
  --code-bg: #1e1040;
  --hero-from: #080212;
  --hero-via: #1a0630;
  --hero-to: #4c1d95;
  --glow: rgba(212,168,67,0.12);
  --badge-bg: #1e1040;
  --badge-text: #b0a0c0;
  --scrollbar-track: #1a0a30;
  --scrollbar-thumb: #3a2a55;
  --gold-glow: rgba(212,168,67,0.15);
}

/* ---- 2. BASE ---- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 56px)}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.7;transition:background var(--transition),color var(--transition);-webkit-font-smoothing:antialiased}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--scrollbar-track)}
::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}
::selection{background:var(--gold-500);color:#1a0630}
:focus-visible{outline:2px solid var(--gold-500);outline-offset:2px}
a{color:var(--gold-600);text-decoration:none}

/* ---- 3. HEADER ---- */
.header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:var(--header-bg);z-index:1000;transition:height var(--transition),box-shadow var(--transition);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.header.scrolled{height:52px;box-shadow:0 4px 30px rgba(0,0,0,0.3)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 1.5rem;height:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem}

/* Ansuz Brand */
.ansuz-brand{display:flex;align-items:center;gap:0.65rem;text-decoration:none;flex-shrink:0}
.ansuz-logo{width:34px;height:34px;background:linear-gradient(135deg,var(--gold-500),var(--gold-300));border-radius:var(--radius-sm);display:grid;place-items:center;font-family:var(--font-display);font-weight:800;font-size:1rem;color:var(--hero-from);flex-shrink:0;transition:transform var(--transition)}
.scrolled .ansuz-logo{width:28px;height:28px;font-size:0.8rem}
.ansuz-logo:hover{transform:rotate(-8deg) scale(1.05)}
.ansuz-brand-text{display:flex;flex-direction:column;line-height:1.2}
.ansuz-brand-name{font-family:var(--font-display);font-weight:800;font-size:1rem;color:#fff;letter-spacing:0.5px}
.ansuz-brand-name span{color:var(--gold-400)}
.ansuz-brand-sub{font-size:0.6rem;color:rgba(255,255,255,0.5);letter-spacing:1px;text-transform:uppercase}
.scrolled .ansuz-brand-name{font-size:0.85rem}
.scrolled .ansuz-brand-sub{display:none}

.header-actions{display:flex;align-items:center;gap:0.35rem}
.header-btn{width:38px;height:38px;border:none;background:rgba(255,255,255,0.08);color:var(--gold-200);border-radius:10px;cursor:pointer;font-size:0.95rem;display:grid;place-items:center;transition:all var(--transition)}
.header-btn:hover{background:rgba(255,255,255,0.15);color:#fff;transform:scale(1.05)}
.header-btn:active{transform:scale(0.95)}

#themeIcon .fa-moon{display:inline}
#themeIcon .fa-sun{display:none}
[data-theme="dark"] #themeIcon .fa-moon{display:none}
[data-theme="dark"] #themeIcon .fa-sun{display:inline}

.menu-btn{width:38px;height:38px;border:none;background:rgba(255,255,255,0.08);border-radius:10px;cursor:pointer;display:none;flex-direction:column;align-items:center;justify-content:center;gap:4px;transition:background var(--transition)}
.menu-btn:hover{background:rgba(255,255,255,0.15)}
.menu-btn span{display:block;width:16px;height:2px;background:var(--gold-200);border-radius:2px;transition:all var(--transition)}
.menu-btn.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---- 4. SEARCH ---- */
.search-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.7);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:2000;display:none;align-items:flex-start;justify-content:center;padding-top:15vh;opacity:0;transition:opacity var(--transition)}
.search-overlay.open{display:flex;opacity:1}
.search-container{width:min(640px,90vw);background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:0 20px 60px rgba(0,0,0,0.4);overflow:hidden;transform:translateY(-20px) scale(0.96);transition:transform var(--transition-spring);border:1px solid var(--border)}
.search-overlay.open .search-container{transform:translateY(0) scale(1)}
.search-input-wrap{display:flex;align-items:center;gap:0.75rem;padding:1rem 1.25rem;border-bottom:1px solid var(--border)}
.search-input-wrap i{color:var(--text-tertiary);font-size:1.1rem}
#searchInput{flex:1;border:none;background:transparent;font-size:1.1rem;font-family:var(--font-body);color:var(--text);outline:none}
#searchInput::placeholder{color:var(--text-tertiary)}
.search-esc{font-size:0.65rem;color:var(--text-tertiary);background:var(--bg-tertiary);padding:0.2rem 0.5rem;border-radius:4px;font-weight:600}
.search-results{max-height:50vh;overflow-y:auto;padding:0.5rem}
.search-result-item{display:flex;align-items:center;gap:0.75rem;padding:0.7rem 1rem;border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition)}
.search-result-item:hover,.search-result-item.highlighted{background:var(--bg-tertiary)}
.search-result-item .s-module{font-size:0.65rem;font-weight:700;color:var(--gold-600);text-transform:uppercase;letter-spacing:0.5px;min-width:80px}
.search-result-item .s-title{font-weight:600;font-size:0.9rem;color:var(--text)}
.search-result-item .s-desc{font-size:0.78rem;color:var(--text-tertiary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.search-result-item mark{background:var(--gold-200);color:var(--purple-950);border-radius:2px;padding:0 2px}
.search-empty{padding:2rem;text-align:center;color:var(--text-tertiary)}

/* ---- 5. HERO ---- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:7rem 1.5rem 3rem;overflow:hidden;background:var(--hero-from)}
.hero-canvas{position:absolute;inset:0;z-index:1;pointer-events:none}
.hero-gradient{position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 20% 20%,var(--hero-via) 0%,transparent 70%),radial-gradient(ellipse 70% 50% at 80% 80%,var(--hero-to) 0%,transparent 60%);z-index:1;pointer-events:none}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);background-size:48px 48px;z-index:1;pointer-events:none;mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 70%)}
.hero-inner{position:relative;z-index:2;text-align:center;max-width:820px;width:100%}
.hero-badge{display:inline-flex;align-items:center;gap:0.5rem;background:rgba(212,168,67,0.1);border:1px solid rgba(212,168,67,0.2);color:var(--gold-300);font-size:0.78rem;font-weight:600;padding:0.4rem 1rem;border-radius:100px;margin-bottom:1.5rem;letter-spacing:0.5px}
.hero-badge i{color:var(--gold-400)}
.hero h1{font-size:clamp(2.8rem,7vw,5rem);font-weight:800;line-height:1.05;color:#fff;margin-bottom:0.5rem;font-family:var(--font-display)}
.hero h1 .gradient-text{background:linear-gradient(135deg,var(--gold-300),var(--gold-500),var(--gold-400));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero h1 .accent-dot{color:var(--gold-500)}
.hero-subtitle{font-size:clamp(1rem,2vw,1.2rem);color:rgba(255,255,255,0.65);max-width:600px;margin:0 auto 2.5rem;min-height:1.6em}
.hero-stats{display:flex;justify-content:center;gap:3.5rem;flex-wrap:wrap;margin-bottom:2rem}
.hero-stat{text-align:center}
.hero-stat .num{font-size:2.8rem;font-weight:800;background:linear-gradient(135deg,var(--gold-300),var(--gold-500));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;font-family:var(--font-display)}
.hero-stat .label{font-size:0.78rem;color:rgba(255,255,255,0.5);text-transform:uppercase;letter-spacing:1px;margin-top:0.2rem;font-weight:600}
.hero-progress{max-width:400px;margin:0 auto}
.hero-progress .progress-info{display:flex;justify-content:space-between;font-size:0.78rem;color:rgba(255,255,255,0.5);margin-bottom:0.4rem}
.hero-progress .progress-bar{height:3px;background:rgba(255,255,255,0.1);border-radius:3px;overflow:hidden}
.hero-progress .progress-fill{height:100%;background:linear-gradient(90deg,var(--gold-500),var(--gold-300));border-radius:3px;transition:width var(--transition);width:0%}
.scroll-indicator{position:absolute;bottom:2rem;left:50%;transform:translateX(-50%);z-index:2;color:rgba(255,255,255,0.3);font-size:1.3rem;animation:bounce 2s infinite}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* ---- 6. MODULE NAV ---- */
.modules-nav{position:sticky;top:var(--header-h);z-index:100;background:var(--nav-blur-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:top var(--transition)}
.modules-nav-inner{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;gap:0.25rem;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.modules-nav-inner::-webkit-scrollbar{display:none}
.modules-nav-inner a{flex-shrink:0;text-decoration:none;color:var(--text-secondary);font-weight:600;font-size:0.8rem;padding:0.7rem 1rem;border-radius:var(--radius-sm);transition:all var(--transition);position:relative;white-space:nowrap}
.modules-nav-inner a:hover{color:var(--gold-600);background:var(--bg-tertiary)}
.modules-nav-inner a.active{color:var(--gold-600);background:var(--badge-bg)}
.modules-nav-inner a.active::after{content:'';position:absolute;bottom:0;left:1rem;right:1rem;height:2px;background:var(--gold-500);border-radius:2px}

/* ---- 7. SECTIONS ---- */
section.module-section{padding:4rem 1.5rem;scroll-margin-top:calc(var(--header-h) + 56px);border-bottom:1px solid var(--border)}
.section-inner{max-width:1200px;margin:0 auto}
.section-header{margin-bottom:2rem;display:flex;align-items:flex-start;gap:1rem}
.section-header .module-icon{width:48px;height:48px;background:linear-gradient(135deg,var(--gold-500),var(--gold-300));color:var(--hero-from);border-radius:var(--radius-md);display:grid;place-items:center;font-size:1.2rem;flex-shrink:0}
.section-header-text{flex:1}
.section-header-text .module-badge{display:inline-block;background:var(--badge-bg);color:var(--gold-600);font-weight:700;font-size:0.7rem;padding:0.25rem 0.75rem;border-radius:100px;margin-bottom:0.4rem;letter-spacing:0.5px;text-transform:uppercase}
.section-header-text h2{font-size:clamp(1.4rem,2.5vw,1.9rem);font-weight:800;color:var(--text);margin-bottom:0.2rem;font-family:var(--font-display)}
.section-header-text p{color:var(--text-secondary);font-size:0.92rem}
.module-controls{display:flex;gap:0.4rem;flex-shrink:0;margin-top:0.25rem}
.module-controls button{width:34px;height:34px;border:1px solid var(--border);background:var(--card-bg);color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;font-size:0.8rem;display:grid;place-items:center;transition:all var(--transition)}
.module-controls button:hover{border-color:var(--gold-500);color:var(--gold-600);background:var(--badge-bg)}
.module-progress{margin-bottom:1.5rem}
.module-progress .progress-label{display:flex;justify-content:space-between;font-size:0.78rem;color:var(--text-tertiary);margin-bottom:0.35rem}
.module-progress .progress-bar{height:3px;background:var(--bg-tertiary);border-radius:3px;overflow:hidden}
.module-progress .progress-fill{height:100%;background:linear-gradient(90deg,var(--gold-500),var(--gold-300));border-radius:3px;transition:width var(--transition);width:0%}

/* ---- 8. TOPIC CARDS ---- */
.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,340px),1fr));gap:1.15rem}
.topic-card{position:relative;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:1.4rem;cursor:pointer;transition:all var(--transition);box-shadow:var(--card-shadow);overflow:hidden}
.topic-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--gold-500),var(--gold-300));opacity:0;transition:opacity var(--transition)}
.topic-card:hover::before{opacity:1}
.topic-card:hover{border-color:var(--border-strong);box-shadow:var(--card-hover-shadow);transform:translateY(-3px)}
.topic-card .card-header{display:flex;justify-content:space-between;align-items:flex-start;gap:0.75rem}
.topic-card .num{font-size:0.65rem;font-weight:700;color:var(--gold-600);text-transform:uppercase;letter-spacing:1px;white-space:nowrap}
.topic-card .card-check{width:22px;height:22px;border:2px solid var(--border-strong);border-radius:6px;background:transparent;cursor:pointer;display:grid;place-items:center;transition:all var(--transition);flex-shrink:0;font-size:0.65rem;color:transparent}
.topic-card .card-check:hover{border-color:var(--gold-400)}
.topic-card .card-check.done{background:var(--gold-500);border-color:var(--gold-500);color:var(--hero-from)}
.topic-card h3{font-size:1.05rem;font-weight:700;color:var(--text);margin:0.4rem 0 0.25rem;font-family:var(--font-display)}
.topic-card .card-desc{font-size:0.85rem;color:var(--text-secondary);line-height:1.6}
.topic-card .tags{margin-top:0.65rem;display:flex;gap:0.35rem;flex-wrap:wrap}
.topic-card .tags span{background:var(--badge-bg);color:var(--badge-text);font-size:0.68rem;padding:0.2rem 0.55rem;border-radius:100px;font-weight:600;transition:all var(--transition)}
.topic-card:hover .tags span{background:var(--gold-50);color:var(--gold-700)}
[data-theme="dark"] .topic-card:hover .tags span{background:#2a1a45;color:var(--gold-300)}
.topic-card .expand-icon{width:26px;height:26px;border-radius:50%;border:1px solid var(--border);display:grid;place-items:center;color:var(--text-tertiary);font-size:0.65rem;transition:all var(--transition);margin-top:0.6rem}
.topic-content-wrapper{display:none}
.topic-content{font-size:0.9rem;color:var(--text-secondary);line-height:1.8}
.topic-content-inner{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border);min-height:0}
.topic-content h4{color:var(--text);font-weight:700;margin:1.15rem 0 0.4rem;font-size:0.95rem}
.topic-content h4:first-child{margin-top:0}
.topic-content ul,.topic-content ol{padding-left:1.4rem;margin:0.35rem 0}
.topic-content li{margin:0.15rem 0}
.topic-content table{width:100%;border-collapse:collapse;margin:0.65rem 0;font-size:0.82rem;display:block;overflow-x:auto}
.topic-content th{background:linear-gradient(135deg,var(--gold-600),var(--gold-500));color:var(--hero-from);padding:0.5rem 0.7rem;text-align:left;font-weight:700;white-space:nowrap}
.topic-content td{padding:0.4rem 0.7rem;border-bottom:1px solid var(--border);white-space:nowrap}
.topic-content tr:nth-child(even){background:var(--bg-secondary)}
.topic-content tr:hover{background:var(--bg-tertiary)}
.topic-content code{background:var(--code-bg);color:var(--purple-700);padding:0.12rem 0.35rem;border-radius:4px;font-family:var(--font-mono);font-size:0.82rem}
[data-theme="dark"] .topic-content code{color:var(--gold-300)}
.topic-content pre{background:#1a0a30;color:#d4c8e0;padding:1rem 1.15rem;border-radius:var(--radius-sm);overflow-x:auto;margin:0.65rem 0;font-family:var(--font-mono);font-size:0.8rem;border:1px solid #2a1a45}
.topic-content pre code{background:none;color:inherit;padding:0}

/* ---- 9. EXCEL SIMULATOR ---- */
.excel-toggle{position:fixed;bottom:2rem;right:2rem;z-index:900;width:54px;height:54px;border:none;border-radius:50%;background:linear-gradient(135deg,var(--gold-500),var(--gold-300));color:var(--hero-from);box-shadow:0 4px 20px var(--gold-glow);cursor:pointer;font-size:1.3rem;display:grid;place-items:center;transition:all var(--transition-spring)}
.excel-toggle:hover{transform:scale(1.1) rotate(-5deg);box-shadow:0 6px 30px var(--gold-glow)}
.excel-toggle span{position:absolute;top:-4px;right:-4px;width:18px;height:18px;background:#e74c3c;border-radius:50%;font-size:0.55rem;color:#fff;font-weight:700;display:grid;place-items:center}
.excel-panel{position:fixed;bottom:calc(2rem + 62px);right:2rem;z-index:899;width:min(520px,calc(100vw - 2rem));height:min(400px,calc(60vh));background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:0 10px 40px rgba(0,0,0,0.3);border:1px solid var(--border);display:none;flex-direction:column;overflow:hidden}
.excel-panel.open{display:flex}
.excel-panel-header{display:flex;justify-content:space-between;align-items:center;padding:0.6rem 1rem;background:var(--bg-tertiary);border-bottom:1px solid var(--border)}
.excel-panel-header span{font-size:0.8rem;font-weight:700;color:var(--text)}
.excel-panel-header button{border:none;background:none;color:var(--text-tertiary);cursor:pointer;font-size:1rem;padding:0.2rem;transition:color var(--transition)}
.excel-panel-header button:hover{color:var(--text)}
.excel-toolbar{display:flex;gap:0.4rem;padding:0.4rem 0.6rem;background:var(--bg-secondary);border-bottom:1px solid var(--border);align-items:center}
.excel-toolbar .cell-ref{font-size:0.75rem;font-weight:700;color:var(--gold-600);background:var(--card-bg);padding:0.2rem 0.5rem;border-radius:4px;border:1px solid var(--border);min-width:48px;text-align:center;font-family:var(--font-mono)}
.excel-toolbar .formula-bar{flex:1;border:1px solid var(--border);border-radius:4px;padding:0.2rem 0.5rem;font-size:0.75rem;background:var(--card-bg);color:var(--text);font-family:var(--font-mono);outline:none}
.excel-toolbar .formula-bar:focus{border-color:var(--gold-500)}
.excel-grid-wrap{flex:1;overflow:auto;position:relative}
.excel-grid{display:grid;gap:0;font-size:0.72rem;font-family:var(--font-mono)}
.excel-cell{padding:0.25rem 0.4rem;border:1px solid var(--border);min-width:64px;min-height:26px;display:flex;align-items:center;cursor:cell;transition:background var(--transition);overflow:hidden;white-space:nowrap}
.excel-cell:hover{background:var(--bg-tertiary)}
.excel-cell.selected{outline:2px solid var(--gold-500);outline-offset:-1px;z-index:1}
.excel-cell.header-cell{background:var(--bg-tertiary);font-weight:600;color:var(--text-secondary);cursor:default;position:sticky;top:0;left:0;z-index:2}
.excel-cell.header-cell.row-header{left:0}
.excel-cell.header-cell.col-header{top:0}
.excel-cell.error{color:#e74c3c}

/* ---- 10. FOCUS MODE ---- */
body.focus-mode .header:not(.focus-bar),
body.focus-mode .modules-nav,
body.focus-mode .footer,
body.focus-mode .excel-toggle,
body.focus-mode .back-to-top{display:none}
body.focus-mode{background:var(--bg)}
.focus-bar{position:fixed;top:0;left:0;right:0;height:48px;background:var(--header-bg);z-index:1000;display:none;align-items:center;padding:0 1rem;gap:0.75rem;backdrop-filter:blur(8px)}
body.focus-mode .focus-bar{display:flex}
.focus-bar button{border:none;background:rgba(255,255,255,0.1);color:var(--gold-200);width:32px;height:32px;border-radius:8px;cursor:pointer;display:grid;place-items:center;transition:all var(--transition);font-size:0.85rem}
.focus-bar button:hover{background:rgba(255,255,255,0.2)}
.focus-bar .focus-title{font-size:0.85rem;font-weight:600;color:#fff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}

/* ---- 11. CERTIFICATE ---- */
.cert-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.7);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:3000;display:none;align-items:center;justify-content:center;padding:2rem}
.cert-overlay.open{display:flex}
.certificate{background:linear-gradient(135deg,#fff,#fdf8e8);width:min(700px,90vw);border-radius:var(--radius-xl);padding:3rem;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,0.3);position:relative;overflow:hidden;border:2px solid var(--gold-400)}
.certificate::before{content:'';position:absolute;top:0;left:0;right:0;height:6px;background:linear-gradient(90deg,var(--gold-500),var(--gold-300),var(--gold-500))}
.cert-badge{font-size:4rem;margin-bottom:0.5rem}
.cert-title{font-family:var(--font-display);font-size:1.8rem;font-weight:800;color:#1a0630;margin-bottom:0.25rem}
.cert-sub{font-size:0.85rem;color:#666;margin-bottom:1.5rem}
.cert-name{font-family:var(--font-display);font-size:2.2rem;font-weight:800;color:var(--gold-600);border-bottom:2px solid var(--gold-200);display:inline-block;padding:0 1rem 0.25rem;margin-bottom:1rem}
.cert-msg{font-size:0.9rem;color:#555;max-width:400px;margin:0 auto 1.5rem;line-height:1.6}
.cert-footer{display:flex;justify-content:center;gap:2rem;font-size:0.75rem;color:#888}
.cert-actions{display:flex;gap:0.75rem;justify-content:center;margin-top:1.5rem;flex-wrap:wrap}
.cert-actions button{padding:0.6rem 1.5rem;border-radius:var(--radius-sm);font-weight:700;font-size:0.85rem;cursor:pointer;transition:all var(--transition);border:none}
.cert-actions .btn-print{background:var(--gold-500);color:var(--hero-from)}
.cert-actions .btn-print:hover{background:var(--gold-400);transform:translateY(-2px)}
.cert-actions .btn-close{background:var(--bg-tertiary);color:var(--text)}
.cert-actions .btn-close:hover{background:var(--border-strong)}

/* ---- 12. CONFETTI ---- */
.confetti-container{position:fixed;inset:0;z-index:2999;pointer-events:none;overflow:hidden}
.confetti-piece{position:absolute;width:10px;height:10px;top:-10px;animation:confetti-fall linear forwards}
@keyframes confetti-fall{0%{transform:translateY(0) rotate(0deg);opacity:1}100%{transform:translateY(100vh) rotate(720deg);opacity:0}}

/* ---- 13. PDF SECTION ---- */
.pdf-section{background:var(--bg-secondary);text-align:center;padding:4rem 1.5rem}
.pdf-section .section-inner{max-width:800px;margin:0 auto}
.pdf-section h2{font-size:clamp(1.4rem,2.5vw,1.9rem);font-weight:800;margin-bottom:0.5rem;font-family:var(--font-display)}
.pdf-section>.section-inner>p{color:var(--text-secondary);margin-bottom:1.5rem;font-size:0.9rem}
.pdf-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,210px),1fr));gap:0.65rem;margin-bottom:1.5rem;text-align:left}
.pdf-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:0.65rem 0.85rem;display:flex;align-items:center;justify-content:space-between;gap:0.65rem;transition:all var(--transition)}
.pdf-card:hover{border-color:var(--gold-500);box-shadow:0 2px 8px var(--gold-glow)}
.pdf-card .pdf-info{display:flex;align-items:center;gap:0.5rem;min-width:0}
.pdf-card .pdf-info i{color:#e74c3c;font-size:1.2rem;flex-shrink:0}
.pdf-card .pdf-info .pdf-name{font-weight:600;font-size:0.78rem;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pdf-card .pdf-info .pdf-size{font-size:0.65rem;color:var(--text-tertiary)}
.pdf-card a{color:var(--gold-500);font-size:0.9rem;padding:0.25rem;border-radius:4px;transition:all var(--transition);flex-shrink:0}
.pdf-card a:hover{background:var(--badge-bg);transform:scale(1.15)}

/* ---- 14. FOOTER ---- */
.footer{background:var(--hero-from);color:rgba(255,255,255,0.6);padding:3rem 1.5rem;text-align:center}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-brand{font-family:var(--font-display);font-size:1.2rem;font-weight:800;color:#fff;margin-bottom:0.3rem}
.footer-brand span{color:var(--gold-400)}
.footer p{font-size:0.82rem}
.footer-social{display:flex;justify-content:center;gap:0.75rem;margin-top:0.75rem}
.footer-social a{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,0.06);color:rgba(255,255,255,0.5);display:grid;place-items:center;transition:all var(--transition)}
.footer-social a:hover{background:var(--gold-500);color:var(--hero-from);transform:translateY(-2px)}

/* ---- 15. BACK TO TOP ---- */
.back-to-top{position:fixed;bottom:calc(2rem + 62px);right:2rem;z-index:900;width:44px;height:44px;border:none;border-radius:50%;background:var(--card-bg);color:var(--gold-600);box-shadow:0 4px 16px rgba(0,0,0,0.15);cursor:pointer;font-size:0.9rem;display:grid;place-items:center;opacity:0;transform:translateY(20px) scale(0.9);pointer-events:none;transition:all var(--transition)}
.back-to-top.visible{opacity:1;transform:translateY(0) scale(1);pointer-events:all}
.back-to-top:hover{background:var(--gold-500);color:var(--hero-from);transform:translateY(-3px);box-shadow:0 6px 20px var(--gold-glow)}
.back-to-top svg{position:absolute;inset:0;width:100%;height:100%;fill:none;stroke:var(--gold-500);stroke-width:2.5;stroke-linecap:round;transform:rotate(-90deg)}
.back-to-top svg circle{stroke-dasharray:113;stroke-dashoffset:113;transition:stroke-dashoffset var(--transition)}

/* ---- 16. MOBILE ---- */
.mobile-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:500;opacity:0;pointer-events:none;transition:opacity var(--transition)}
.mobile-overlay.open{opacity:1;pointer-events:all}
.mobile-drawer{position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:var(--bg);z-index:501;transform:translateX(-100%);transition:transform var(--transition);overflow-y:auto;padding:1.5rem}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a{display:block;padding:0.75rem 1rem;color:var(--text);font-weight:600;font-size:0.9rem;border-radius:var(--radius-sm);transition:background var(--transition)}
.mobile-drawer a:hover{background:var(--bg-tertiary)}

/* ---- 17. KB HINT ---- */
.kb-hint{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:0.55rem 0.9rem;box-shadow:0 4px 20px rgba(0,0,0,0.15);z-index:800;display:flex;align-items:center;gap:0.85rem;font-size:0.75rem;color:var(--text-secondary);opacity:0;transition:all var(--transition);pointer-events:none}
.kb-hint.visible{opacity:1;transform:translateX(-50%) translateY(0)}
.kb-hint kbd{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:4px;padding:0.12rem 0.4rem;font-family:var(--font-body);font-size:0.65rem;font-weight:600;color:var(--text)}

/* ---- 18. REVEAL ---- */
.reveal{opacity:0;transform:translateY(40px);transition:opacity 700ms ease,transform 700ms cubic-bezier(0.16,1,0.3,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:80ms}
.reveal-delay-2{transition-delay:160ms}
.reveal-delay-3{transition-delay:240ms}
.reveal-delay-4{transition-delay:320ms}

/* ---- 19. RESPONSIVE ---- */
@media(max-width:768px){
  .menu-btn{display:flex}
  .hero{min-height:90vh}
  .hero h1{font-size:2.2rem}
  .hero-stats{gap:1.5rem}
  .hero-stat .num{font-size:2rem}
  .topics-grid{grid-template-columns:1fr}
  section.module-section{padding:2.5rem 1rem}
  .section-header{flex-direction:column}
  .section-header .module-icon{width:40px;height:40px;font-size:1rem}
  .module-controls{align-self:flex-end;margin-top:-2.5rem}
  .pdf-grid{grid-template-columns:1fr}
  .excel-panel{right:1rem;bottom:calc(1.5rem + 58px);width:calc(100vw - 2rem);height:50vh}
  .excel-toggle{bottom:1.5rem;right:1.5rem;width:48px;height:48px;font-size:1.15rem}
  .back-to-top{bottom:calc(1.5rem + 56px);right:1.5rem;width:40px;height:40px}
  .certificate{padding:2rem 1.5rem}
  .cert-name{font-size:1.6rem}
}

@media(max-width:480px){
  .hero h1{font-size:1.8rem}
  .search-container{width:100vw;border-radius:0}
  .topic-card{padding:1.1rem}
}

/* ---- 20. PRINT ---- */
@media print{
  .header,.modules-nav,.back-to-top,.excel-toggle,.excel-panel,.menu-btn,.header-actions,.search-overlay,.mobile-overlay,.mobile-drawer,.kb-hint,.module-controls,.card-check,.expand-icon,.scroll-indicator,.footer-social,.excel-panel,.confetti-container,.cert-overlay,.focus-bar{display:none!important}
  .hero{min-height:auto;padding:2rem 1rem}
  .hero-grid,.hero-gradient,.hero-canvas{display:none}
  .topic-card{break-inside:avoid;box-shadow:none;border:1px solid #ccc}
  .topic-content-wrapper{grid-template-rows:1fr!important}
  .topic-content{display:block}
  section.module-section{padding:1.5rem 0;border:none}
  body{color:#000;background:#fff}
}

/* ---- 21. REDUCED MOTION ---- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0.01ms!important;animation-duration:0.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ---- 22. FULLSCREEN LESSON VIEW ---- */
.fullscreen-overlay{position:fixed;inset:0;z-index:2000;background:var(--bg);display:none;flex-direction:column}
.fullscreen-overlay.open{display:flex}
.fullscreen-overlay .fs-header{display:flex;align-items:center;justify-content:space-between;padding:0.7rem 1.25rem;background:var(--header-bg);backdrop-filter:blur(12px);position:sticky;top:0;z-index:10;flex-shrink:0;gap:0.75rem}
.fs-btn,.fullscreen-overlay .fs-close{width:34px;height:34px;border:none;background:rgba(255,255,255,0.08);color:var(--gold-200);border-radius:8px;cursor:pointer;font-size:0.9rem;display:grid;place-items:center;transition:all var(--transition);flex-shrink:0}
.fs-btn:hover,.fullscreen-overlay .fs-close:hover{background:rgba(255,255,255,0.15);color:#fff}
.fs-progress{font-size:0.72rem;color:rgba(255,255,255,0.5);white-space:nowrap;font-weight:600;letter-spacing:0.3px}
.fs-body{flex:1;overflow-y:auto;padding:2rem 1.5rem 4rem;max-width:800px;margin:0 auto;width:100%}
.fs-body .fs-badge{display:inline-block;background:var(--badge-bg);color:var(--gold-600);font-weight:700;font-size:0.7rem;padding:0.25rem 0.75rem;border-radius:100px;margin-bottom:0.75rem;letter-spacing:0.5px;text-transform:uppercase}
.fs-body h2{font-family:var(--font-display);font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;color:var(--text);margin-bottom:0.5rem}
.fs-body .fs-desc{color:var(--text-secondary);font-size:0.95rem;margin-bottom:1rem}
.fs-body .fs-tags{display:flex;gap:0.35rem;flex-wrap:wrap;margin-bottom:1.5rem}
.fs-body .fs-tags span{background:var(--badge-bg);color:var(--badge-text);font-size:0.68rem;padding:0.2rem 0.55rem;border-radius:100px;font-weight:600}
.fs-body .fs-content{font-size:0.92rem;color:var(--text-secondary);line-height:1.9}
.fs-body .fs-content h4{color:var(--text);font-weight:700;margin:1.25rem 0 0.4rem;font-size:1rem}
.fs-body .fs-content h4:first-child{margin-top:0}
.fs-body .fs-content ul,.fs-body .fs-content ol{padding-left:1.4rem;margin:0.35rem 0}
.fs-body .fs-content li{margin:0.15rem 0}
.fs-body .fs-content table{width:100%;border-collapse:collapse;margin:0.65rem 0;font-size:0.85rem;display:block;overflow-x:auto}
.fs-body .fs-content th{background:linear-gradient(135deg,var(--gold-600),var(--gold-500));color:var(--hero-from);padding:0.5rem 0.7rem;text-align:left;font-weight:700;white-space:nowrap}
.fs-body .fs-content td{padding:0.4rem 0.7rem;border-bottom:1px solid var(--border);white-space:nowrap}
.fs-body .fs-content tr:nth-child(even){background:var(--bg-secondary)}
.fs-body .fs-content code{background:var(--code-bg);color:var(--purple-700);padding:0.12rem 0.35rem;border-radius:4px;font-family:var(--font-mono);font-size:0.82rem}
[data-theme="dark"] .fs-body .fs-content code{color:var(--gold-300)}
.fs-body .fs-content pre{background:#1a0a30;color:#d4c8e0;padding:1rem 1.15rem;border-radius:var(--radius-sm);overflow-x:auto;margin:0.65rem 0;font-family:var(--font-mono);font-size:0.8rem;border:1px solid #2a1a45}
.fs-body .fs-content pre code{background:none;color:inherit;padding:0}
.fs-actions{display:flex;align-items:center;gap:0.75rem;margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border);flex-wrap:wrap}
.fs-check-btn{padding:0.65rem 1.25rem;border-radius:var(--radius-sm);font-weight:700;font-size:0.85rem;cursor:pointer;transition:all var(--transition);border:none;background:var(--bg-tertiary);color:var(--text-secondary);display:flex;align-items:center;gap:0.4rem}
.fs-check-btn.done{background:var(--gold-500);color:var(--hero-from)}
.fs-check-btn:hover{transform:translateY(-1px)}
.fs-continue-btn{padding:0.65rem 1.25rem;border-radius:var(--radius-sm);font-weight:700;font-size:0.85rem;cursor:pointer;transition:all var(--transition);border:none;background:var(--gold-500);color:var(--hero-from);display:flex;align-items:center;gap:0.4rem;margin-left:auto}
.fs-continue-btn:hover{background:var(--gold-400);transform:translateY(-1px)}
.fs-nav{display:flex;gap:0.35rem}
.fs-nav button{padding:0.5rem 0.75rem;border:1px solid var(--border);background:var(--card-bg);color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;font-size:0.8rem;transition:all var(--transition)}
.fs-nav button:hover{border-color:var(--gold-500);color:var(--gold-600)}
@media(min-width:768px){.fs-body{padding:3rem 2rem 5rem}}

/* ---- 23. CURRICULUM PANEL ---- */
.curriculum-overlay{position:fixed;inset:0;z-index:2100;background:rgba(0,0,0,0.5);backdrop-filter:blur(8px);display:none;opacity:0;transition:opacity var(--transition)}
.curriculum-overlay.open{display:flex;opacity:1}
.curriculum-panel{width:min(360px,85vw);height:100%;background:var(--bg);display:flex;flex-direction:column;box-shadow:4px 0 30px rgba(0,0,0,0.2);transform:translateX(-100%);transition:transform var(--transition-spring)}
.curriculum-overlay.open .curriculum-panel{transform:translateX(0)}
.curriculum-overlay:not(.slide-left) .curriculum-panel{margin-left:auto;transform:translateX(100%)}
.curriculum-overlay:not(.slide-left).open .curriculum-panel{transform:translateX(0)}
.curriculum-head{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.1rem;border-bottom:1px solid var(--border);flex-shrink:0}
.curriculum-head .ch-title{font-weight:700;font-size:0.9rem;color:var(--text);display:flex;align-items:center;gap:0.5rem}
.curriculum-head .ch-title i{color:var(--gold-500)}
.curriculum-head button{width:30px;height:30px;border:none;background:var(--bg-tertiary);color:var(--text-secondary);border-radius:7px;cursor:pointer;font-size:0.8rem;display:grid;place-items:center}
.curriculum-head button:hover{color:var(--text);background:var(--border-strong)}
.curriculum-body{flex:1;overflow-y:auto;padding:0.5rem 0.6rem}
.cm-item{margin-bottom:0.25rem}
.cm-head{display:flex;align-items:center;gap:0.5rem;padding:0.55rem 0.65rem;border-radius:var(--radius-sm);cursor:pointer;font-weight:600;font-size:0.8rem;color:var(--text);transition:background var(--transition)}
.cm-head:hover{background:var(--bg-tertiary)}
.cm-head .cm-num{width:22px;height:22px;border-radius:6px;background:var(--bg-tertiary);display:grid;place-items:center;font-size:0.6rem;color:var(--text-tertiary);flex-shrink:0}
.cm-head .cm-num.complete{background:var(--gold-500);color:var(--hero-from)}
.cm-head .cm-chev{font-size:0.6rem;color:var(--text-tertiary);margin-left:auto;transition:transform var(--transition)}
.cm-item.open .cm-chev{transform:rotate(90deg)}
.cm-item .cm-topics{display:none;padding-left:0.3rem}
.cm-item.open .cm-topics{display:block}
.cm-topic{display:flex;align-items:center;gap:0.45rem;padding:0.4rem 0.65rem;border-radius:var(--radius-sm);cursor:pointer;font-size:0.75rem;color:var(--text-secondary);transition:all var(--transition)}
.cm-topic:hover{background:var(--bg-tertiary);color:var(--text)}
.cm-topic.active{color:var(--gold-600);font-weight:600}
.cm-topic .ct-dot{width:6px;height:6px;border-radius:50%;background:var(--border-strong);flex-shrink:0;transition:background var(--transition)}
.cm-topic .ct-dot.done{background:var(--gold-500)}
.cm-topic .ct-dot.active-dot{background:var(--gold-600);box-shadow:0 0 6px var(--gold-glow)}
.curriculum-foot{flex-shrink:0;padding:0.75rem 1rem;border-top:1px solid var(--border)}
.curriculum-foot .cf-label{font-size:0.68rem;color:var(--text-tertiary);margin-bottom:0.25rem}
.curriculum-foot .cf-bar{height:3px;background:var(--bg-tertiary);border-radius:3px;overflow:hidden}
.curriculum-foot .cf-fill{height:100%;background:linear-gradient(90deg,var(--gold-500),var(--gold-300));border-radius:3px;transition:width var(--transition)}

/* ---- 24. CONTINUE LEARNING ---- */
.continue-bar{position:fixed;bottom:0;left:0;right:0;z-index:100;background:var(--header-bg);backdrop-filter:blur(12px);padding:0.65rem 1rem;display:none;align-items:center;justify-content:space-between;gap:0.75rem}
.continue-bar.visible{display:flex}
.continue-bar .cb-info{display:flex;align-items:center;gap:0.6rem;min-width:0}
.continue-bar .cb-icon{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--gold-500),var(--gold-300));display:grid;place-items:center;color:var(--hero-from);font-size:0.8rem;flex-shrink:0}
.continue-bar .cb-text{font-size:0.72rem;color:rgba(255,255,255,0.5)}
.continue-bar .cb-text strong{display:block;font-size:0.82rem;color:#fff;font-weight:600}
.continue-bar button{padding:0.55rem 1.25rem;border:none;border-radius:var(--radius-sm);background:var(--gold-500);color:var(--hero-from);font-weight:700;font-size:0.8rem;cursor:pointer;transition:all var(--transition);white-space:nowrap}
.continue-bar button:hover{background:var(--gold-400);transform:translateY(-1px)}

@media(max-width:768px){
  .continue-bar{padding:0.55rem 0.75rem}
  .continue-bar .cb-text strong{font-size:0.78rem}
  .continue-bar button{font-size:0.75rem;padding:0.45rem 1rem}
}

/* ---- 25. COURSE HERO REFINEMENTS ---- */
.hero-cta{display:flex;gap:0.75rem;justify-content:center;flex-wrap:wrap;margin-top:1.5rem}
.hero-cta button{padding:0.7rem 1.5rem;border:none;border-radius:var(--radius-sm);font-weight:700;font-size:0.85rem;cursor:pointer;transition:all var(--transition)}
.hero-cta .btn-primary{background:var(--gold-500);color:var(--hero-from)}
.hero-cta .btn-primary:hover{background:var(--gold-400);transform:translateY(-2px);box-shadow:0 6px 20px var(--gold-glow)}
.hero-cta .btn-secondary{background:rgba(255,255,255,0.08);color:var(--gold-200);border:1px solid rgba(255,255,255,0.12)}
.hero-cta .btn-secondary:hover{background:rgba(255,255,255,0.12);transform:translateY(-2px)}
.hero-meta{display:flex;justify-content:center;gap:0.75rem;flex-wrap:wrap;margin-top:0.75rem;font-size:0.72rem;color:rgba(255,255,255,0.4)}
.hero-meta span{display:flex;align-items:center;gap:0.3rem}