:root{--bg: #000000;--bg-elevated: #0a0a0c;--surface: rgba(18, 18, 22, .85);--surface-solid: #121216;--surface-hover: rgba(28, 28, 34, .9);--border: rgba(255, 255, 255, .06);--border-hover: rgba(255, 255, 255, .12);--text: #f4f4f6;--text-secondary: #a1a1aa;--muted: #71717a;--accent: #f7931a;--accent-muted: #f9b04d;--accent-glow: rgba(247, 147, 26, .15);--positive: #22c55e;--negative: #ef4444;--grid: rgba(255, 255, 255, .04);--radius: 10px;--radius-sm: 6px;--shadow: 0 4px 32px rgba(0, 0, 0, .5);--font-ui: "Space Grotesk", "Noto Sans KR", system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace}.app.theme-btc{--accent: #f7931a;--accent-muted: #f9b04d;--accent-glow: rgba(247, 147, 26, .12)}.app.theme-eth{--accent: #627eea;--accent-muted: #8fa3eb;--accent-glow: rgba(98, 126, 234, .12)}.app.theme-sol{--accent: #00ffa3;--accent-muted: #5effc0;--accent-glow: rgba(0, 255, 163, .12)}.app.theme-xrp{--accent: #00aae4;--accent-muted: #5ec8ed;--accent-glow: rgba(0, 170, 228, .12)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:#000;color:var(--text);font-family:var(--font-ui);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{position:relative;min-height:100vh;max-width:960px;margin:0 auto;padding:2.5rem 1.5rem 4rem}.app:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;background:radial-gradient(ellipse 120% 80% at 50% -20%,var(--accent-glow) 0%,transparent 50%),radial-gradient(ellipse 80% 60% at 80% 100%,var(--accent-glow) 0%,transparent 45%),#000;pointer-events:none;transition:background .6s ease}.header{text-align:center;margin-bottom:3rem}.title{font-family:var(--font-ui);font-size:1.875rem;font-weight:700;letter-spacing:-.03em;margin:0 0 .5rem;color:var(--text)}.subtitle{color:var(--muted);font-size:.875rem;font-weight:500;letter-spacing:.01em;margin:0}.controls{background:var(--surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius);padding:1.75rem 2rem;margin-bottom:2rem;box-shadow:var(--shadow)}.control-group{margin-bottom:1.5rem}.control-group:last-child{margin-bottom:0}.label{display:block;font-family:var(--font-ui);font-size:.7rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.75rem}.coin-selector{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem}.coin-btn{display:flex;flex-direction:column;align-items:center;gap:.6rem;padding:1.1rem .75rem;font-family:var(--font-ui);font-size:.85rem;font-weight:600;color:var(--text-secondary);background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease,background .2s ease}.coin-btn:hover{transform:translateY(-2px);border-color:var(--border-hover);background:var(--surface-hover);color:var(--text);box-shadow:0 8px 24px #00000059}.coin-btn.active{border-width:1px;border-color:transparent;color:#fff;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-muted) 100%);box-shadow:0 4px 20px var(--accent-glow)}.coin-btn.active:hover{transform:translateY(-2px);box-shadow:0 8px 28px var(--accent-glow)}.coin-icon{display:flex;align-items:center;justify-content:center}.coin-btn.active .coin-icon svg{filter:brightness(0) invert(1)}.option-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}.option-row{display:flex;flex-wrap:wrap;gap:.5rem}.option-btn{padding:.75rem 1rem;font-family:var(--font-ui);font-size:.9rem;font-weight:500;color:var(--text-secondary);background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease,background .2s ease}.option-btn:hover{transform:translateY(-1px);border-color:var(--border-hover);background:var(--surface-hover);color:var(--text);box-shadow:0 4px 16px #0000004d}.option-btn.active{border-color:transparent;color:#fff;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-muted) 100%);box-shadow:0 4px 16px var(--accent-glow)}.option-btn.active:hover{transform:translateY(-1px);box-shadow:0 6px 20px var(--accent-glow)}.select{width:100%;max-width:260px;padding:.75rem 2.25rem .75rem 1rem;font-family:var(--font-ui);font-size:.9rem;font-weight:500;color:var(--text);background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2371717a' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;transition:border-color .2s ease,box-shadow .2s ease}.select:hover{border-color:var(--border-hover)}.select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}@keyframes resultFadeIn{0%{opacity:0}to{opacity:1}}@keyframes resultSlideUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.result-block{animation:resultFadeIn .5s ease-out forwards}.result-hero{text-align:center;padding:2rem 1.5rem;margin-bottom:1.5rem;background:var(--surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);animation:resultSlideUp .5s cubic-bezier(.22,1,.36,1) .05s both}.result-hero-label{display:block;font-family:var(--font-ui);font-size:.8rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;margin-bottom:.5rem}.result-hero-amount{font-family:var(--font-mono);font-size:clamp(1.75rem,4vw,2.5rem);font-weight:700;letter-spacing:-.03em;line-height:1.2}.result-hero-amount.positive{color:var(--positive);text-shadow:0 0 40px rgba(34,197,94,.25)}.result-hero-amount.negative{color:var(--negative);text-shadow:0 0 40px rgba(239,68,68,.2)}.summary{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:2rem}.summary-card{background:var(--surface);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:var(--radius);padding:1.35rem;text-align:center;box-shadow:var(--shadow);transition:border-color .2s ease,box-shadow .2s ease}.summary-card.summary-card-1{animation:resultSlideUp .5s cubic-bezier(.22,1,.36,1) .1s both}.summary-card.summary-card-2{animation:resultSlideUp .5s cubic-bezier(.22,1,.36,1) .18s both}.summary-card.summary-card-3{animation:resultSlideUp .5s cubic-bezier(.22,1,.36,1) .26s both}.summary-card:hover{border-color:var(--border-hover);box-shadow:0 8px 32px #0006}.summary-label{display:block;font-family:var(--font-ui);font-size:.7rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.5rem}.summary-value{font-family:var(--font-mono);font-size:1.2rem;font-weight:600;letter-spacing:-.02em}.summary-value.highlight{color:var(--accent)}.summary-value.positive{color:var(--positive)}.summary-value.negative{color:var(--negative)}.chart-section{background:var(--surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius);padding:1.75rem;margin-bottom:2rem;box-shadow:var(--shadow)}.chart-section.chart-comparison{animation:resultSlideUp .5s cubic-bezier(.22,1,.36,1) .34s both}.chart-section.chart-timeline{animation:resultSlideUp .5s cubic-bezier(.22,1,.36,1) .42s both}.chart-title{font-family:var(--font-ui);font-size:1rem;font-weight:600;letter-spacing:-.01em;margin:0 0 1.25rem;color:var(--text)}.chart-wrap{min-height:320px}.chart-wrap-bar{min-height:200px}.chart-note{font-family:var(--font-ui);font-size:.75rem;color:var(--muted);margin:.75rem 0 0}.chart-tooltip{background:var(--surface-solid);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;min-width:200px;box-shadow:var(--shadow)}.chart-tooltip-title{font-family:var(--font-ui);font-size:.7rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}.chart-tooltip-date{font-family:var(--font-mono);font-size:.95rem;font-weight:600;color:var(--text);margin-bottom:10px}.chart-tooltip-rows{display:flex;flex-direction:column;gap:6px}.chart-tooltip-row{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;gap:16px}.chart-tooltip-row span:first-child{color:var(--muted)}.chart-tooltip-row span:last-child{font-family:var(--font-mono);font-weight:500;color:var(--text)}.empty-state{text-align:center;color:var(--muted);padding:3rem;font-weight:500}.footer{text-align:center;font-family:var(--font-ui);font-size:.75rem;font-weight:500;color:var(--muted);letter-spacing:.02em}@media (max-width: 640px){.app{padding:1.5rem 1rem 3rem}.title,.result-hero-amount{font-size:1.5rem}.coin-selector,.option-grid{grid-template-columns:repeat(2,1fr)}.summary{grid-template-columns:1fr}}