@import"https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;600;700;900&family=JetBrains+Mono:wght@400;500;600&family=Inter:wght@300;400;500;600;700&display=swap";:root{--navy-deep: #0a1828;--navy-medium: #1a2942;--navy-light: #2d3e5c;--amber-bright: #f4a261;--amber-dark: #e07a3d;--amber-glow: rgba(244, 162, 97, .15);--cream: #faf8f3;--cream-dark: #f0ede5;--cream-darker: #e8e4da;--sage: #52796f;--sage-light: #6b9383;--sage-glow: rgba(82, 121, 111, .12);--text-primary: #1a1a1a;--text-secondary: #5a5a5a;--text-tertiary: #8a8a8a;--text-inverse: #fafaf9;--font-display: "Crimson Pro", Georgia, serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", "Courier New", monospace;--space-xs: 8px;--space-sm: 16px;--space-md: 24px;--space-lg: 32px;--space-xl: 48px;--space-2xl: 64px;--space-3xl: 96px;--shadow-subtle: 0 1px 3px rgba(10, 24, 40, .06), 0 1px 2px rgba(10, 24, 40, .04);--shadow-medium: 0 4px 12px rgba(10, 24, 40, .1), 0 2px 4px rgba(10, 24, 40, .06);--shadow-large: 0 12px 40px rgba(10, 24, 40, .15), 0 4px 16px rgba(10, 24, 40, .1);--shadow-xl: 0 20px 60px rgba(10, 24, 40, .2), 0 8px 24px rgba(10, 24, 40, .12);--shadow-amber: 0 8px 32px var(--amber-glow), 0 2px 8px rgba(244, 162, 97, .25);--border-width: 1px;--border-color: rgba(10, 24, 40, .08);--border-accent: var(--amber-bright);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-2xl: 24px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-body);background:var(--cream);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;line-height:1.6}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' 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768px){.header{max-width:1400px;padding-left:var(--space-xl);padding-right:var(--space-xl)}}.header-content{display:flex;justify-content:space-between;align-items:center;padding:var(--space-sm) var(--space-md);position:relative}.logo{display:flex;align-items:center;gap:12px}.logo-icon{font-size:28px;filter:drop-shadow(0 2px 8px rgba(244,162,97,.3))}.logo-text{font-family:var(--font-display);font-size:22px;font-weight:900;color:var(--navy-deep);letter-spacing:-.03em;text-transform:uppercase}@media (min-width: 768px){.logo-text{font-size:26px}}.profile-btn{border:none;background:none;cursor:pointer;padding:0;transition:transform .3s 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768px){.hero{padding:var(--space-3xl) var(--space-2xl) var(--space-3xl)}}.hero-decoration{position:absolute;top:-20%;right:-15%;width:600px;height:600px;background:radial-gradient(circle,var(--amber-glow) 0%,transparent 70%);border-radius:50%;pointer-events:none;opacity:.6}.hero>div:first-child{display:inline-block!important;background:var(--navy-deep)!important;color:var(--amber-bright)!important;padding:8px 20px!important;border-radius:6px!important;margin-bottom:24px!important;font-size:13px!important;font-weight:600!important;font-family:var(--font-mono)!important;letter-spacing:.05em!important;text-transform:uppercase!important;box-shadow:var(--shadow-amber)!important;border:1px solid rgba(244,162,97,.3)!important}.hero-title{font-family:var(--font-display);font-size:52px;font-weight:900;line-height:.95;margin-bottom:24px;letter-spacing:-.04em;position:relative;color:var(--navy-deep)}@media (min-width: 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768px){.flashcard-container{max-width:800px;margin:0 auto var(--space-xl)}}.flashcard{width:100%;min-height:360px;position:relative;transform-style:preserve-3d;transition:transform .6s;cursor:pointer}@media (min-width: 768px){.flashcard{min-height:460px}}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;width:100%;min-height:360px;backface-visibility:hidden;border-radius:var(--radius-xl);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:var(--space-xl) var(--space-lg);text-align:center;box-shadow:var(--shadow-xl)}@media (min-width: 768px){.flashcard-face{min-height:460px;padding:var(--space-3xl) var(--space-xl);border-radius:var(--radius-2xl)}}.flashcard-front{background:var(--cream-dark);border:2px solid var(--border-color)}.flashcard-back{background:linear-gradient(135deg,var(--navy-deep),var(--navy-medium));color:var(--text-inverse);transform:rotateY(180deg);border:2px solid 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18px;min-height:52px;border:none;border-radius:var(--radius-md);font-weight:700;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);font-size:12px;background:var(--cream-darker);color:var(--navy-deep);border:var(--border-width) solid var(--border-color);font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.05em;box-shadow:var(--shadow-subtle)}@media (min-width: 768px){.fc-btn{font-size:13px;padding:18px 22px;min-height:56px}.fc-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-medium)}}.fc-btn:active:not(:disabled){transform:scale(.97)}.fc-btn.know{background:var(--navy-deep);color:var(--amber-bright);border-color:var(--navy-deep);box-shadow:var(--shadow-medium)}@media (min-width: 768px){.fc-btn.know:hover{box-shadow:var(--shadow-large)}}.fc-btn:disabled{opacity:.4;cursor:not-allowed}.content-block{margin-bottom:var(--space-xl);-webkit-user-select:text;user-select:text}.content-block h4{font-family:var(--font-display);color:var(--navy-deep);font-size:22px;margin:var(--space-lg) 0 var(--space-md) 0;font-weight:700;letter-spacing:-.02em;line-height:1.3}@media (min-width: 768px){.content-block h4{font-size:24px}}.content-block h4:before{content:"◆ ";color:var(--amber-bright);margin-right:10px;font-size:.9em}.content-block p{color:var(--text-secondary);margin-bottom:16px;font-size:15px;line-height:1.8;font-weight:400}@media (min-width: 768px){.content-block p{font-size:16px;line-height:1.9;margin-bottom:18px}}.content-block ul{list-style:none;margin:var(--space-md) 0}.content-block li{padding:12px 0 12px 32px;color:var(--text-secondary);position:relative;font-size:15px;line-height:1.8}@media (min-width: 768px){.content-block li{font-size:16px;padding:14px 0 14px 36px}}.content-block li:before{content:"→";position:absolute;left:8px;color:var(--amber-bright);font-weight:700;font-size:18px}.def-box{background:linear-gradient(135deg,#0a18280f,#0a182808);border-left:4px solid var(--navy-deep);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:var(--space-md) var(--space-lg);margin:var(--space-md) 0;box-shadow:var(--shadow-medium);transition:all .3s cubic-bezier(.4,0,.2,1)}@media (min-width: 768px){.def-box{padding:var(--space-lg) var(--space-xl);border-radius:0 var(--radius-lg) var(--radius-lg) 0}.def-box:hover{box-shadow:var(--shadow-large);transform:translate(4px)}}.def-box .term{color:var(--navy-deep);font-weight:700;font-size:18px;margin-bottom:12px;font-family:var(--font-display);letter-spacing:-.01em}@media (min-width: 768px){.def-box .term{font-size:20px}}.def-box .meaning{color:var(--text-secondary);line-height:1.8;font-size:15px}@media (min-width: 768px){.def-box .meaning{font-size:16px;line-height:1.9}}.important-box{background:linear-gradient(135deg,var(--amber-glow),rgba(244,162,97,.08));border-radius:0 var(--radius-md) var(--radius-md) 0;padding:var(--space-md) var(--space-lg);margin:var(--space-md) 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