:root{--color-bg: #ffffff;--color-surface: #f5f5f7;--color-surface-alt: #eef2f7;--color-border: #e2e2ec;--color-text-primary: #0a0a14;--color-text-muted: #55556a;--color-accent: #1a80c4;--color-accent-rgb: 26, 128, 196;--color-accent-hover: #0d5fa0;--color-accent-glow: rgba(26, 128, 196, .14);--color-success: #22c55e;--color-success-bg: #f0fdf4;--color-warning: #f59e0b;--color-warning-bg: #fffbeb;--color-error: #ef4444;--color-btn-text: #ffffff;--chart-contribution: #1a80c4;--chart-returns: #22c55e;--chart-text: #374151;--chart-bg: #ffffff;--chart-grid: #e5e7eb;--color-footer-bg: #0a0a14;--color-footer-text: #8888aa;--color-footer-bright: #f0f0f5;--shadow-soft: rgba(0,0,0,.06);--shadow-medium: rgba(0,0,0,.1);--shadow-card: 0 2px 12px rgba(0,0,0,.07);--font-display: "Space Grotesk", sans-serif;--font-body: "Inter", sans-serif;--font-mono: "JetBrains Mono", monospace;--text-hero: clamp(40px, 6vw, 80px);--text-h2: clamp(28px, 4vw, 48px);--text-h3: clamp(18px, 2.5vw, 26px);--max-width: 1200px;--header-height: 68px;--card-radius: 16px;--transition-fast: .15s ease;--transition-base: .3s ease;--transition-slow: .4s ease-out}[data-theme=dark]{--color-bg: #08080f;--color-surface: #1c1c2e;--color-surface-alt: #12121e;--color-border: #3a3a55;--color-text-primary: #f0f0f5;--color-text-muted: #9090b0;--color-accent: #38c2e8;--color-accent-rgb: 56, 194, 232;--color-accent-hover: #1aa8d4;--color-accent-glow: rgba(56, 194, 232, .18);--color-success: #34d399;--color-success-bg: #022c22;--color-warning: #fbbf24;--color-warning-bg: #1f1600;--color-error: #f87171;--color-btn-text: #ffffff;--chart-contribution: #38c2e8;--chart-returns: #34d399;--chart-text: #d1d5db;--chart-bg: #1c1c2e;--chart-grid: #3a3a55;--shadow-soft: rgba(0,0,0,.2);--shadow-medium: rgba(0,0,0,.3);--shadow-card: 0 2px 12px rgba(0,0,0,.3)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes 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h1{font-size:clamp(24px,4vw,40px);background:linear-gradient(135deg,var(--color-text-primary) 0%,var(--color-accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.calc-header p{color:var(--color-text-muted);font-size:1.125rem}.calc-layout{display:grid;grid-template-columns:1fr;gap:32px}@media (min-width: 1024px){.calc-layout{grid-template-columns:420px 1fr;gap:40px;align-items:start}}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--card-radius);padding:28px;box-shadow:var(--shadow-card)}.card.card-glass{background:#ffffffb3;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}[data-theme=dark] .card.card-glass{background:#1c1c2eb3}.form-group{margin-bottom:24px}.form-group label{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:.875rem;font-weight:600;color:var(--color-text-primary)}.form-group label 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