:root{--grad-start: #f59e0b;--grad-mid: #f97316;--grad-end: #ef4444;--accent-1: #f59e0b;--accent-2: #f97316;--accent-3: #ef4444;--bg-body: #0a0806;--bg-surface: rgba(18, 14, 10, .65);--bg-card: rgba(22, 16, 10, .55);--bg-card-hover: rgba(30, 22, 14, .7);--bg-input: rgba(16, 12, 8, .8);--border-subtle: rgba(245, 158, 11, .1);--border-glow: rgba(245, 158, 11, .25);--text-primary: #f5f0e8;--text-secondary: #ad9a80;--text-tertiary: #786550;--text-accent: #f59e0b;--container-max: 1200px;--section-gap: 72px;--radius-sm: 10px;--radius-md: 16px;--radius-lg: 24px;--radius-xl: 32px;--font-display: "Space Grotesk", sans-serif;--font-body: "Inter", sans-serif;--font-mono: "JetBrains Mono", monospace;--ease-out-expo: cubic-bezier(.16, 1, .3, 1);--transition-fast: .2s var(--ease-out-expo);--transition-med: .4s var(--ease-out-expo);--transition-slow: .7s var(--ease-out-expo)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-body);background:var(--bg-body);color:var(--text-primary);line-height:1.7;overflow-x:hidden;position:relative}::selection{background:#f59e0b40;color:#fff}a{color:var(--text-accent);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-3)}img{max-width:100%;display:block}.ambient-bg{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}.orb{position:absolute;border-radius:50%;filter:blur(120px);opacity:.3;animation:orbFloat 20s ease-in-out infinite}.orb-1{width:600px;height:600px;background:radial-gradient(circle,var(--accent-1),transparent 70%);top:-10%;left:-8%;animation-duration:22s}.orb-2{width:500px;height:500px;background:radial-gradient(circle,var(--accent-2),transparent 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saturate(1.4);-webkit-backdrop-filter:blur(20px) saturate(1.4);box-shadow:0 1px 0 var(--border-subtle),0 8px 32px #00000080;padding:10px 0}.nav-container{max-width:var(--container-max);margin:0 auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between}.nav-logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text-primary)}.logo-icon{width:40px;height:40px;flex-shrink:0}.logo-icon svg{width:100%;height:100%}.logo-text{font-family:var(--font-display);font-weight:700;font-size:1.25rem;letter-spacing:-.02em}.logo-accent{background:linear-gradient(135deg,var(--accent-1),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;align-items:center;gap:8px}.nav-link{color:var(--text-secondary);font-size:.875rem;font-weight:500;padding:8px 16px;border-radius:var(--radius-sm);transition:all 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center}.form-select:focus{border-color:var(--accent-1);box-shadow:0 0 0 3px #f59e0b1f}.form-select option{background:#160e0a;color:var(--text-primary)}.result-container{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:32px;backdrop-filter:blur(12px);height:100%;display:flex;flex-direction:column}.result-display{text-align:center;padding:24px 0}.result-big{font-family:var(--font-display);font-size:clamp(2.2rem,4vw,3rem);font-weight:800;background:linear-gradient(135deg,var(--accent-1),var(--accent-2),var(--accent-3));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px;word-break:break-all}.result-label-text{color:var(--text-secondary);font-size:.9rem}.result-divider{height:1px;background:linear-gradient(to right,transparent,var(--border-glow),transparent);margin:16px 0}.result-formula-card{background:#f59e0b0a;border:1px solid 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#f59e0b1f}.table-search::placeholder{color:var(--text-tertiary)}.conversion-table{width:100%;border-collapse:collapse}.conversion-table thead th{padding:14px 20px;text-align:left;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);border-bottom:1px solid var(--border-subtle);background:#f59e0b08}.conversion-table tbody td{padding:14px 20px;font-size:.9rem;border-bottom:1px solid rgba(245,158,11,.04);transition:background var(--transition-fast)}.conversion-table tbody tr:hover td{background:#f59e0b0a}.conversion-table tbody tr{cursor:pointer}.conversion-table .mono{font-family:var(--font-mono);font-weight:500;color:var(--accent-1)}.features{padding:var(--section-gap) 0}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:32px 28px;transition:all 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var(--transition-fast)}.faq-item:hover{border-color:var(--border-glow)}.faq-question{width:100%;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;background:none;border:none;color:var(--text-primary);font-family:var(--font-body);font-size:1rem;font-weight:600;cursor:pointer}.faq-chevron{flex-shrink:0;color:var(--text-tertiary);transition:transform var(--transition-fast)}.faq-item.open .faq-chevron{transform:rotate(180deg);color:var(--accent-1)}.faq-answer{max-height:0;overflow:hidden;transition:max-height var(--transition-med),padding var(--transition-med)}.faq-item.open .faq-answer{max-height:500px}.faq-answer p{padding:0 24px 20px;color:var(--text-secondary);font-size:.95rem;line-height:1.7}.footer{border-top:1px solid var(--border-subtle);padding:64px 0 0}.footer-container{max-width:var(--container-max);margin:0 auto;padding:0 32px}.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px}.footer-brand .nav-logo{margin-bottom:16px}.footer-tagline{color:var(--text-secondary);font-size:.9rem;line-height:1.6;max-width:300px}.footer-links-group h4{font-family:var(--font-display);font-size:.85rem;font-weight:700;color:var(--text-primary);margin-bottom:16px;text-transform:uppercase;letter-spacing:.06em}.footer-links-group a{display:block;color:var(--text-secondary);font-size:.88rem;padding:4px 0;transition:color var(--transition-fast)}.footer-links-group a:hover{color:var(--accent-1)}.footer-languages{border-top:1px solid var(--border-subtle);padding:28px 0}.footer-languages h4{font-family:var(--font-display);font-size:.78rem;font-weight:700;color:var(--text-primary);margin-bottom:14px;text-transform:uppercase;letter-spacing:.08em}.footer-language-links{display:flex;flex-wrap:wrap;gap:8px;direction:ltr}.footer-language-links a{display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:34px;padding:0 10px;border:1px 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p{color:var(--text-primary);font-size:1.05rem;margin-bottom:0}.content-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:28px}.content-step-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:24px 20px;text-align:center;position:relative;backdrop-filter:blur(12px);transition:all var(--transition-med)}.content-step-card:hover{border-color:var(--border-glow);transform:translateY(-3px);box-shadow:0 12px 36px #f59e0b0f}.content-step-number{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:linear-gradient(135deg,var(--accent-1),var(--accent-2));color:#0a0806;font-family:var(--font-mono);font-weight:700;font-size:.85rem;border-radius:50%;margin-bottom:14px}.content-step-card h3{font-family:var(--font-display);font-size:1rem;font-weight:700;margin-bottom:8px;color:var(--text-primary)}.content-step-card p{color:var(--text-secondary);font-size:.9rem;line-height:1.6;margin-bottom:0}.formula-display{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:24px 28px;margin-bottom:24px;backdrop-filter:blur(12px)}.formula-display code{font-family:var(--font-mono);font-size:1.1rem;font-weight:600;color:var(--accent-1);display:block;margin-bottom:8px}.formula-display code:last-child{margin-bottom:0}.formula-display .formula-label{font-size:.78rem;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.06em;font-weight:600;margin-bottom:10px;display:block}.content-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:24px}.content-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:24px;backdrop-filter:blur(12px)}.content-card h3{font-family:var(--font-display);font-size:1rem;font-weight:700;margin-bottom:10px;color:var(--accent-1)}.content-card p{color:var(--text-secondary);font-size:.92rem;line-height:1.65;margin-bottom:0}.content-list{list-style:none;padding:0;margin:0 0 24px}.content-list li{color:var(--text-secondary);font-size:.95rem;line-height:1.7;padding:8px 0 8px 24px;position:relative;border-bottom:1px solid rgba(245,158,11,.04)}.content-list li:last-child{border-bottom:none}.content-list li:before{content:"";position:absolute;left:0;top:16px;width:8px;height:8px;background:linear-gradient(135deg,var(--accent-1),var(--accent-2));border-radius:50%}@media(max-width:768px){.content-steps,.content-grid-2{grid-template-columns:1fr}}@media(max-width:1024px){.hero-container{grid-template-columns:1fr;gap:40px;text-align:center}.hero-description{margin:0 auto 36px}.hero-actions,.hero-stats{justify-content:center}.hero-visual{order:-1}.hero-equation-container{width:350px;height:350px}.calculator-layout{grid-template-columns:1fr}.features-grid{grid-template-columns:repeat(2,1fr)}.footer-top{grid-template-columns:1fr 1fr;gap:32px}}@media(max-width:768px){:root{--section-gap: 80px}.nav-links,.nav-cta{display:none}.mobile-menu-btn{display:flex}.mobile-menu-btn.open span:nth-child(1){transform:rotate(45deg) translateY(7px)}.mobile-menu-btn.open span:nth-child(2){opacity:0}.mobile-menu-btn.open span:nth-child(3){transform:rotate(-45deg) translateY(-7px)}.nav-links.open{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:#0a0806f2;backdrop-filter:blur(20px);padding:16px 24px;border-bottom:1px solid var(--border-subtle);gap:4px}.hero{min-height:auto;padding:100px 0 60px}.hero-title{font-size:2.4rem}.hero-equation-container{width:280px;height:280px}.steps-grid{flex-direction:column}.step-connector{transform:rotate(90deg);width:40px}.features-grid,.footer-top{grid-template-columns:1fr}.table-header{flex-direction:column;align-items:flex-start}.table-controls{width:100%}.table-search{flex:1;width:auto}}@media(max-width:480px){.hero-actions{flex-direction:column;align-items:stretch}.hero-stats{flex-direction:column;gap:16px}.hero-stat-divider{width:40px;height:1px}.result-extras{grid-template-columns:1fr}.diagram-tabs{overflow-x:auto;flex-wrap:nowrap}.diagram-tab{white-space:nowrap;font-size:.8rem;padding:10px 16px}.diagram-canvas-wrap{min-height:auto;padding:18px 12px}.diagram-explanation{padding:0 18px 24px}.table-controls{flex-direction:column}.table-search{width:100%}}