:root{--primary: #7B1FA2;--accent: #9C27B0;--bg: #F3E5F5;--soft1: #F8EAFB;--soft2: #FCE4EC;--dark: #2E2E2E;--card-bg: #ffffff;--text-main: #1f2937;--solution-bg: #f8f5ff;--quick-nav-bg: #faf7ff;--quick-nav-border: #e9d5ff;--btn-prev-bg: #eee;--btn-prev-text: #555;--btn-prev-hover-bg: #e0e0e0;--glass-bg: rgba(255, 255, 255, .95);--glass-border: rgba(255, 255, 255, .2);--shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, .1)}body.dark-mode{--bg: #121212;--card-bg: #1e1e1e;--text-main: #e0e0e0;--soft1: #3e2744;--soft2: #422833;--solution-bg: #252525;--quick-nav-bg: #1e1e1e;--quick-nav-border: #333;--btn-prev-bg: #333;--btn-prev-text: #ddd;--btn-prev-hover-bg: #444;--glass-bg: rgba(30, 30, 30, .95);--glass-border: rgba(255, 255, 255, .05);--shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, .5)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{font-family:Segoe UI,sans-serif;background:var(--bg);color:var(--text-main);line-height:1.7;transition:background 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0%,transparent 70%);border-radius:50%;pointer-events:none}.hero h1{margin-bottom:5px;font-size:2rem;font-weight:800;letter-spacing:-1px;background:linear-gradient(135deg,#8e44ad,#6c3483);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;color:transparent;position:relative;z-index:1}.hero p{opacity:.75;margin-top:8px;font-size:.95rem;color:#2c3e50;font-weight:500;letter-spacing:.3px;position:relative;z-index:1;max-width:600px;margin-left:auto;margin-right:auto;line-height:1.5}.hero-buttons{margin-top:12px;display:flex;justify-content:center;gap:12px;flex-wrap:wrap;position:relative;z-index:1}.btn{padding:12px 28px;border-radius:24px;font-weight:600;text-decoration:none;transition:all .3s cubic-bezier(.4,0,.2,1);cursor:pointer;border:none;font-size:.95rem;letter-spacing:.3px;box-shadow:0 4px 15px #8e44ad1f}.btn-light{background:#fff;color:#8e44ad;border:1.5px solid #e5d9f0;box-shadow:0 4px 15px 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#7b1fa24d}.btn-prev:hover{background:var(--btn-prev-hover-bg)}.btn-next:hover{transform:translateY(-2px)}.nav-btn:focus-visible{outline:3px solid var(--primary);outline-offset:2px}.floating-controls{position:fixed;bottom:20px;left:20px;z-index:1000;display:flex;align-items:center;gap:12px;padding:8px 12px;background:var(--glass-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);border-radius:50px;box-shadow:var(--shadow-lg);transition:all .3s ease}.back-btn-floating{background:transparent;color:var(--primary);padding:8px 16px;border-radius:30px;text-decoration:none;font-weight:600;display:flex;align-items:center;gap:8px;transition:background 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.breadcrumb{justify-content:flex-start}.breadcrumb::-webkit-scrollbar{display:none}}.q-table-container{overflow-x:auto;margin:1.5rem 0;border-radius:12px;box-shadow:0 4px 15px #0000000d;border:1px solid rgba(0,0,0,.05)}.q-table{width:100%;border-collapse:collapse;font-size:.95rem;background:var(--card-bg);min-width:max-content}.q-table th,.q-table td{padding:12px 16px;border:1px solid rgba(0,0,0,.08);text-align:center}.q-table th{background:var(--soft1);color:var(--primary);font-weight:600}.q-table tr:nth-child(2n){background:#00000005}body.dark-mode .q-table-container{border-color:#ffffff1a;box-shadow:0 4px 15px #0003}body.dark-mode .q-table th{background:#8e44ad26;border-color:#ffffff1a;color:var(--primary-light)}body.dark-mode .q-table td{border-color:#ffffff1a;color:var(--text-main)}body.dark-mode .q-table tr:nth-child(2n){background:#ffffff08}