:root{--color-bg: #f4f7f5;--color-surface: #ffffff;--color-surface-sunken: #e7ece9;--color-surface-frost: #f7faf8;--color-text: #1b211e;--color-text-muted: #616b66;--color-accent: #0e7b5b;--color-accent-soft: #e8f5ef;--color-accent-2: #2372a8;--color-accent-2-soft: #eaf2f9;--color-divider: color-mix(in srgb, #1b211e 10%, transparent);--color-border: #dde3e0;--color-border-strong: #c2cbc7;--color-warning: #985705;--color-warning-soft: #fbeedc;--color-danger: #b03a31;--color-danger-strong: #8f2c25;--color-danger-soft: #fbeae8;--color-neutral-100: #f7f9f8;--color-neutral-200: #edf1ef;--color-neutral-300: #dde3e0;--color-neutral-400: #c2cbc7;--color-neutral-500: #9aa5a0;--color-neutral-600: #77837d;--color-neutral-700: #58635e;--color-neutral-800: #3b443f;--color-neutral-900: #222927;--color-accent-100: #e8f5ef;--color-accent-200: #cdeadd;--color-accent-300: #9dd7c0;--color-accent-400: #5fbe9c;--color-accent-500: #2aa079;--color-accent-600: #0e7b5b;--color-accent-700: #0b6249;--color-accent-800: #0a4a38;--color-accent-900: #073124;--color-accent-2-100: #eaf2f9;--color-accent-2-200: #d0e4f3;--color-accent-2-300: #a6cce7;--color-accent-2-400: #6fadd6;--color-accent-2-500: #3e8dc2;--color-accent-2-600: #2372a8;--color-accent-2-700: #1b5985;--color-accent-2-800: #164261;--color-accent-2-900: #102c40;--color-section: #dceee6;--color-section-glow: #ecf7f2;--color-section-ghost: #b9dbcc;--font-heading: Pretendard-Medium;--font-heading-weight: 500;--font-body: Pretendard-Regular;--font-mono: JetBrainsMono-Regular;--font-mono-medium: JetBrainsMono-Medium;--font-size-control: 15px;--space-0: 0px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-6: 24px;--space-8: 32px;--space-12: 48px;--radius-xs: 6px;--radius-sm: 10px;--radius-md: 14px;--radius-lg: 20px;--radius-full: 999px;--shadow-sm: 0 1px 2px rgba(27, 33, 30, .06);--shadow-md: 0 2px 8px rgba(27, 33, 30, .08);--shadow-lg: 0 12px 28px rgba(27, 33, 30, .12);--min-touch-target: 44px;--breakpoint-medium: 600px;--breakpoint-expanded: 905px;--content-max-width: 720px}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:15px;line-height:1.6;font-weight:400}h1,h2,h3,h4,h5,h6{margin:0;font-family:var(--font-heading);font-weight:var(--font-heading-weight);line-height:1.3}h1{font-size:34px}h2{font-size:27px}h3{font-size:22px}h4{font-size:19px}h5{font-size:16px}h6{font-size:13px}.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}*,*:before,*:after{box-sizing:border-box}.screen{display:flex;flex-direction:column;min-height:100%;background:var(--color-bg)}.screen-body{flex:1;min-height:0}.row{display:flex;flex-direction:row;align-items:center;gap:var(--space-3)}.row-between{justify-content:space-between}.row-grow{flex:1;min-width:0}.stack{display:flex;flex-direction:column;gap:var(--space-3)}.stack-tight{gap:var(--space-2)}.stack-loose{gap:var(--space-6)}.grid{display:grid;gap:var(--space-3)}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.gutter{padding-left:var(--space-4);padding-right:var(--space-4)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);min-height:var(--min-touch-target);padding:0 var(--space-4);border:1px solid transparent;border-radius:var(--radius-sm);background:transparent;font-family:var(--font-heading);font-size:var(--font-size-control);cursor:pointer}.btn-primary{background:var(--color-accent);color:var(--color-neutral-100)}.btn-primary:hover{background:var(--color-accent-700)}.btn-primary:active{background:var(--color-accent-800)}.btn-secondary{background:var(--color-surface);border-color:var(--color-border-strong);color:var(--color-text)}.btn-secondary:hover{background:var(--color-neutral-200)}.btn-secondary:active{background:var(--color-neutral-300)}.btn-ghost{color:var(--color-accent);padding:0 var(--space-2)}.btn-ghost:hover{background:var(--color-accent-soft)}.btn-danger{background:var(--color-danger);color:var(--color-neutral-100)}.btn-icon{width:var(--min-touch-target);padding:0}.btn-block{width:100%}.btn:disabled{opacity:.4;cursor:not-allowed}.btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.field{display:flex;flex-direction:column;gap:var(--space-1)}.input{min-height:var(--min-touch-target);padding:0 var(--space-3);border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text);font-family:var(--font-body);font-size:var(--font-size-control)}.input:focus{border-color:var(--color-accent);border-width:2px;outline:none}.input[aria-invalid=true]{border-color:var(--color-warning)}.field-error{color:var(--color-warning);font-size:13px}.field-hint{color:var(--color-text-muted);font-size:13px}.card{padding:var(--space-4);border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--shadow-sm)}.card-flat{box-shadow:none;border:1px solid var(--color-border)}.card-kicker{color:var(--color-accent);font-size:13px}.card-title{font-family:var(--font-heading);font-size:16px}.card-body{color:var(--color-text-muted)}.elev-sm{box-shadow:var(--shadow-sm)}.elev-md{box-shadow:var(--shadow-md)}.elev-lg{box-shadow:var(--shadow-lg)}.chip{display:inline-flex;align-items:center;gap:var(--space-2);min-height:var(--min-touch-target);padding:0 var(--space-3);border:1px solid var(--color-border-strong);border-radius:var(--radius-full);background:var(--color-surface);color:var(--color-text)}.chip[aria-selected=true]{border-color:var(--color-accent);background:var(--color-accent-soft);color:var(--color-accent-800)}.tag{display:inline-flex;align-items:center;padding:var(--space-1) var(--space-2);border:1px solid 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format("woff2");font-weight:700;font-display:swap}@font-face{font-family:JetBrainsMono-Regular;src:url(/fonts/JetBrainsMono-Regular.subset.woff2) format("woff2");font-weight:400;font-display:swap}@font-face{font-family:JetBrainsMono-Medium;src:url(/fonts/JetBrainsMono-Medium.subset.woff2) format("woff2");font-weight:500;font-display:swap}:root{--font-heading: Pretendard-Medium, system-ui, -apple-system, sans-serif;--font-body: Pretendard-Regular, system-ui, -apple-system, sans-serif;--font-mono: JetBrainsMono-Regular, ui-monospace, monospace;--font-mono-medium: JetBrainsMono-Medium, ui-monospace, monospace;--section-gap: 96px;--section-gap-tight: 64px;--reading-max-width: 640px;--phone-radius: 46px;--phone-screen-radius: 36px;--font-display: Pretendard-Bold, Pretendard-Medium, system-ui, sans-serif;--font-display-weight: 700}@media(max-width:599px){:root{--section-gap: 64px;--section-gap-tight: 48px}}html{scroll-behavior:smooth}body{min-height:100vh;-webkit-font-smoothing:antialiased;word-break:keep-all;overflow-wrap:break-word}:root{--motion-allowed: 1}@media(prefers-reduced-motion:reduce){:root{--motion-allowed: 0}html{scroll-behavior:auto}}.btn{text-decoration:none}.section{padding-top:var(--section-gap);padding-bottom:var(--section-gap)}.section-tight{padding-top:var(--section-gap-tight);padding-bottom:var(--section-gap-tight)}.reading{max-width:var(--reading-max-width)}.page{max-width:1080px;margin-left:auto;margin-right:auto}.skip-link{position:absolute;left:var(--space-4);top:var(--space-4);z-index:10;transform:translateY(-200%)}.skip-link:focus-visible{transform:translateY(0)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}