:root{--color-bg: #f8fafc;--color-surface: #ffffff;--color-border: #e2e8f0;--color-text: #0f172a;--color-text-muted: #64748b;--color-primary: #2563eb;--color-primary-soft: #eff6ff;--color-up: #dc2626;--color-down: #2563eb;--color-danger: #dc2626;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow-md: 0 8px 20px rgba(15, 23, 42, .08);--header-height: 56px;--bottom-nav-height: 64px}@media (prefers-color-scheme: dark){:root{--color-bg: #0b1120;--color-surface: #111827;--color-border: #1f2937;--color-text: #f1f5f9;--color-text-muted: #94a3b8;--color-primary: #60a5fa;--color-primary-soft: rgba(96, 165, 250, .14);--color-up: #f87171;--color-down: #60a5fa;--color-danger: #f87171;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);--shadow-md: 0 8px 24px rgba(0, 0, 0, .55)}}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans KR,Apple SD Gothic Neo,sans-serif;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button,input{font-family:inherit}h1,h2,h3{margin:0 0 16px;letter-spacing:-.01em}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{position:sticky;top:0;z-index:10;height:var(--header-height);display:flex;align-items:center;padding:0 16px;background:var(--color-surface);border-bottom:1px solid var(--color-border)}.app-title{font-weight:700;font-size:17px}.app-content{flex:1;width:100%;max-width:720px;margin:0 auto;padding:16px 16px calc(var(--bottom-nav-height) + 24px)}.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:10;background:var(--color-surface);border-top:1px solid var(--color-border);padding-bottom:env(safe-area-inset-bottom)}.bottom-nav-inner{display:flex;max-width:720px;margin:0 auto}.bottom-nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:56px;padding:8px 0 6px;color:var(--color-text-muted);font-size:11px}.bottom-nav-item.active{color:var(--color-primary);font-weight:700}.bottom-nav-icon{font-size:20px;line-height:1}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;align-items:start}.card{background:var(--color-surface);border:1px solid 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