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.1);--glass-bg: rgba(255, 255, 255, .6);--glass-border: rgba(255, 255, 255, .3);--glass-shadow: 0 8px 32px rgba(31, 38, 135, .1);--glow: 0 0 20px rgba(79, 70, 229, .15);--header-bg: rgba(255, 255, 255, .85);--particle-color: rgba(79, 70, 229, .08);--footer-bg: #0f172a;--footer-text: #e2e8f0;--class-grad-strong: 14%;--class-grad-soft: 10%;--class-outline-strong: 58%;--deck-grad-strong: 14%;--deck-grad-soft: 10%;--purple: #8b5cf6;--pink: #ec4899;--font-ui: "Outfit", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;--font-urdu: "Jameel Noori Nastaleeq", "Noto Nastaliq Urdu", "Noto Naskh Arabic", "Noto Sans Arabic", "Segoe UI", Tahoma, Arial, sans-serif;--font-arabic: "Noto Naskh Arabic", "Noto Sans Arabic", "Segoe UI", Tahoma, Arial, sans-serif;--font-sindhi: "Noto Sans Arabic", "Noto Naskh Arabic", "Segoe UI", Tahoma, Arial, sans-serif}[data-theme=dark]{--bg-primary: #0b1120;--bg-secondary: #111827;--bg-card: rgba(30, 41, 59, .7);--bg-card-hover: rgba(30, 41, 59, 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.rv-opt-label{order:0}body.subject-rtl .rv-opt-bullet,body.subject-rtl .rv-opt-icon{order:1}body.subject-rtl .rv-opt-text{order:2;direction:rtl;text-align:right}body.subject-rtl .rv-correct-tag,body.subject-rtl .rv-your-tag{order:3}body.subject-rtl .rv-exp-text{direction:rtl;text-align:right}body:before,body:after{content:"";position:fixed;inset:-60vh -60vw;border-radius:999px;pointer-events:none;z-index:0;background:radial-gradient(40% 35% at 20% 15%,rgba(79,70,229,.18),transparent 60%),radial-gradient(35% 30% at 80% 30%,rgba(6,182,212,.14),transparent 62%),radial-gradient(30% 30% at 65% 85%,rgba(245,158,11,.1),transparent 60%);filter:blur(22px) saturate(120%);opacity:.7;transform:translateZ(0)}[data-theme=dark] body:before,[data-theme=dark] body:after{background:radial-gradient(40% 35% at 20% 15%,rgba(99,102,241,.28),transparent 60%),radial-gradient(35% 30% at 80% 30%,rgba(34,211,238,.22),transparent 62%),radial-gradient(30% 30% at 65% 85%,rgba(245,158,11,.14),transparent 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var(--border);background:var(--bg-secondary)}.header-title{font-weight:700;font-size:1.15rem;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap;min-width:0;overflow:hidden;text-overflow:ellipsis;max-width:min(42vw,260px)}.header-nav{display:flex;align-items:center;gap:.5rem;flex:0 0 auto}.header-nav a,.header-nav button{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-secondary);font-size:1.1rem;cursor:pointer;transition:all .3s ease}.header-nav a:hover,.header-nav button:hover{background:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:var(--glow)}.theme-toggle{position:relative;overflow:hidden}.theme-toggle .icon-sun,.theme-toggle .icon-moon{position:absolute;transition:all .4s ease}[data-theme=dark] .theme-toggle 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.2s}.breadcrumb a:hover{opacity:.7}.breadcrumb .sep{font-size:.8rem}.glass-card{background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:20px;padding:2rem;box-shadow:var(--glass-shadow);transition:all .4s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.glass-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--secondary),var(--accent));opacity:0;transition:opacity .3s ease}.glass-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg),var(--glow);background:var(--bg-card-hover)}.glass-card:hover:before{opacity:1}.cards-grid{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.cards-grid-2{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));max-width:700px;margin:0 auto}.class-card{cursor:pointer;text-align:center;padding:2.5rem 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1.25rem;font-weight:800;color:#fff}.class-card:nth-child(1) .card-icon{background:linear-gradient(135deg,var(--primary),#818cf8)}.class-card:nth-child(2) .card-icon{background:linear-gradient(135deg,var(--secondary),#67e8f9)}.class-card .card-title{font-family:Space Grotesk,sans-serif;font-size:1.5rem;font-weight:700;margin-bottom:.5rem}.class-card .card-desc{color:var(--text-secondary);font-size:.95rem}.subject-card{cursor:pointer;display:flex;align-items:center;gap:1.25rem;padding:1.25rem 1.5rem;position:relative;overflow:hidden;border-width:2px;border-style:solid;border-color:color-mix(in srgb,var(--card-accent, var(--primary)) 72%,var(--bg-secondary))}[data-theme=dark] .subject-card{border-width:1px;border-color:color-mix(in srgb,var(--card-accent, var(--secondary-light)) 70%,transparent);box-shadow:var(--shadow)}.subject-card>*{position:relative;z-index:1}.subject-card:after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.92;transition:opacity .35s 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var(--accent);--card-accent-2: var(--primary-light)}.subject-card[data-subject=urdu],.subject-card[data-subject=sindhi]{--card-accent: var(--pink);--card-accent-2: var(--danger)}.subject-card[data-subject=islamiat]{--card-accent: var(--purple);--card-accent-2: var(--secondary)}.subject-card[data-subject=pst]{--card-accent: var(--purple);--card-accent-2: var(--accent)}.subject-card[data-subject=biology]{--card-accent: var(--pink);--card-accent-2: var(--secondary)}.subject-card[data-subject=computer]{--card-accent: var(--primary-light);--card-accent-2: var(--secondary)}.subject-card .subj-icon{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;flex-shrink:0;color:#fff;font-weight:600}.subject-card .subj-info h3{font-size:1.1rem;font-weight:600;margin-bottom:.15rem}.subject-card .subj-info p{font-size:.85rem;color:var(--text-muted)}.subj-math{background:linear-gradient(135deg,#4f46e5,#818cf8)}.subj-physics{background:linear-gradient(135deg,#06b6d4,#67e8f9)}.subj-chemistry{background:linear-gradient(135deg,#10b981,#6ee7b7)}.subj-english{background:linear-gradient(135deg,#f59e0b,#fcd34d)}.subj-urdu,.subj-sindhi{background:linear-gradient(135deg,#ef4444,#fca5a5)}.subj-islamiat,.subj-pst{background:linear-gradient(135deg,#8b5cf6,#c4b5fd)}.subj-biology{background:linear-gradient(135deg,#ec4899,#f9a8d4)}.subj-computer{background:linear-gradient(135deg,#64748b,#94a3b8)}.test-card{cursor:pointer;display:flex;align-items:center;justify-content:space-between;padding:1.25rem 1.5rem;position:relative;overflow:hidden;border-width:2px;border-style:solid;border-color:color-mix(in srgb,var(--card-accent, var(--primary)) 72%,var(--bg-secondary))}[data-theme=dark] .test-card{border-width:1px;border-color:color-mix(in srgb,var(--card-accent, var(--secondary-light)) 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auto}.quiz-progress-bar{height:6px;background:var(--border);border-radius:10px;margin-bottom:1.5rem;overflow:hidden}.quiz-progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:10px;transition:width .4s ease}.quiz-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}.quiz-counter{font-size:.95rem;color:var(--text-secondary);font-weight:500}.quiz-counter span{color:var(--primary);font-weight:700}.question-card{padding:2rem}.question-text{font-size:1.2rem;font-weight:600;margin-bottom:1.75rem;line-height:1.7;font-family:Space Grotesk,sans-serif}.question-text sup,.option-text sup{font-size:.7em;vertical-align:super;line-height:0}.question-text sub,.option-text sub{font-size:.7em;vertical-align:sub;line-height:0}.question-text .frac-inline,.option-text .frac-inline{display:inline-grid;grid-auto-flow:row;grid-auto-rows:auto;justify-items:stretch;vertical-align:-.08em;line-height:1.1;margin:0 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