/* StepHint — shared styles */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f6f8;
  --bg-card: #ffffff;
  --ink: #0e1726;
  --ink-2: #4a5667;
  --ink-3: #788393;
  --line: #e2e7ed;
  --accent: #0b8a5f;
  --accent-strong: #08714e;
  --accent-ink: #ffffff;
  --accent-soft: #e7f5ef;
  --warn: #a8550a;
  --warn-soft: #fdf2e2;
  --info: #2353c0;
  --info-soft: #e9effc;
  --code-bg: #0f1720;
  --code-line: #1c2633;
  --code-ink: #d7e1ec;
  --code-dim: #6f7f92;
  --tok-k: #ff9ab0;
  --tok-f: #8cc8ff;
  --tok-n: #f5c97a;
  --tok-c: #6f7f92;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(14, 23, 38, .05), 0 10px 30px rgba(14, 23, 38, .07);
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Noto Sans CJK KR", "Malgun Gothic", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0f15;
    --bg-soft: #0e151d;
    --bg-card: #111922;
    --ink: #e6ecf2;
    --ink-2: #a2aebb;
    --ink-3: #7a8695;
    --line: #1e2935;
    --accent: #3ccf96;
    --accent-strong: #5fdcab;
    --accent-ink: #03140c;
    --accent-soft: rgba(60, 207, 150, .12);
    --warn: #f0b35a;
    --warn-soft: rgba(240, 179, 90, .12);
    --info: #86abff;
    --info-soft: rgba(134, 171, 255, .12);
    --code-bg: #0b1117;
    --code-line: #18212c;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

/* Language switching: Korean is the default, English shows when html[data-lang="en"]. */
html[data-lang="ko"] [lang="en"]:not(html) { display: none !important; }
html[data-lang="en"] [lang="ko"]:not(html) { display: none !important; }

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
code, pre, kbd, textarea.code { font-family: var(--mono); }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

.skip-link {
  position: absolute; left: -9999px; top: 8px;
  background: var(--accent); color: var(--accent-ink);
  padding: 8px 12px; border-radius: 8px; z-index: 100;
}
.skip-link:focus { left: 8px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.brand-mark { width: 30px; height: 30px; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { text-decoration: none; color: var(--ink-2); font-size: 15px; font-weight: 500; }
.nav a:hover { color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-toggle {
  display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px;
  background: var(--bg-soft);
}
.lang-toggle button {
  appearance: none; border: 0; background: transparent; color: var(--ink-3);
  font: 600 12px/1 var(--font); padding: 7px 10px; border-radius: 999px; cursor: pointer;
}
.lang-toggle button[aria-pressed="true"] { background: var(--bg-card); color: var(--ink); box-shadow: 0 1px 2px rgba(0,0,0,.08); }
@media (max-width: 860px) { .nav { display: none; } .header-actions { margin-left: auto; } }

/* Buttons & badges */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 20px; border-radius: 12px;
  font: 600 15px/1 var(--font); text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: background .15s, border-color .15s, transform .15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { background: var(--bg-card); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink-3); }
.btn-sm { min-height: 36px; padding: 0 14px; font-size: 14px; border-radius: 10px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-strong);
  font-size: 13px; font-weight: 600;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }

/* Sections */
section { padding: 96px 0; }
@media (max-width: 640px) { section { padding: 64px 0; } }
.section-soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.eyebrow { color: var(--accent-strong); font-weight: 700; font-size: 14px; letter-spacing: .02em; margin: 0 0 10px; }
h1, h2, h3 { letter-spacing: -.02em; line-height: 1.25; margin: 0; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.15rem; }
.lead { color: var(--ink-2); font-size: 1.12rem; margin: 16px 0 0; max-width: 640px; }
.section-head { margin-bottom: 44px; }

/* Hero */
.hero { padding: 80px 0 96px; }
.hero-grid { display: grid; grid-template-columns: 1.02fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 5.4vw, 3.8rem); margin-top: 22px; }
.hero h1 .accent { color: var(--accent); }
.hero .lead { font-size: 1.15rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-note { color: var(--ink-3); font-size: 14px; margin-top: 16px; }
@media (max-width: 960px) {
  .hero { padding: 48px 0 72px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* Demo card (example screen) */
.demo { position: relative; }
.demo-label {
  position: absolute; top: -12px; right: 16px; z-index: 2;
  background: var(--bg-card); border: 1px solid var(--line); color: var(--ink-3);
  font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px;
}
.editor {
  background: var(--code-bg); color: var(--code-ink);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  border: 1px solid var(--code-line);
}
.editor-bar { display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--code-line); }
.editor-bar i { width: 10px; height: 10px; border-radius: 50%; background: #2a3644; display: block; }
.editor-bar .file { margin-left: 8px; font: 500 12.5px/1 var(--mono); color: var(--code-dim); }
.editor pre { margin: 0; padding: 16px 0 52px; font-size: 13px; line-height: 1.7; overflow-x: auto; }
.editor code { display: block; counter-reset: ln; }
.editor .ln { display: block; padding: 0 18px 0 0; }
.editor .ln::before { counter-increment: ln; content: counter(ln); display: inline-block; width: 38px; padding-right: 14px; text-align: right; color: #3b4858; user-select: none; }
.editor .ln.hl { background: rgba(240, 179, 90, .10); box-shadow: inset 2px 0 0 #f0b35a; }
.tok-k { color: var(--tok-k); }
.tok-f { color: var(--tok-f); }
.tok-n { color: var(--tok-n); }
.tok-c { color: var(--tok-c); font-style: italic; }

.review-card {
  position: relative; margin: -28px 0 0 auto; width: min(92%, 440px);
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px 18px 16px;
}
.review-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.review-head strong { font-size: 14px; }
.review-head span { color: var(--ink-3); font-size: 12px; }
.review-row { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: start; padding: 9px 0; border-top: 1px solid var(--line); font-size: 13.5px; line-height: 1.55; }
.review-row:first-of-type { border-top: 0; }
.tag { display: inline-block; font-size: 11.5px; font-weight: 700; padding: 3px 8px; border-radius: 6px; white-space: nowrap; }
.tag-ok { background: var(--accent-soft); color: var(--accent-strong); }
.tag-warn { background: var(--warn-soft); color: var(--warn); }
.tag-info { background: var(--info-soft); color: var(--info); }
.hint-steps { display: flex; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); align-items: center; }
.hint-steps .step { flex: 1; text-align: center; font-size: 12px; font-weight: 600; padding: 6px 0; border-radius: 8px; border: 1px dashed var(--line); color: var(--ink-3); }
.hint-steps .step.on { border: 1px solid var(--accent); color: var(--accent-strong); background: var(--accent-soft); }
.hint-text { font-size: 13.5px; margin: 10px 0 0; color: var(--ink); }

/* Problem/why */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.why { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--bg-card); }
.why p { color: var(--ink-2); margin: 10px 0 0; }
.why .num { font: 700 13px/1 var(--mono); color: var(--ink-3); }
@media (max-width: 860px) { .why-grid { grid-template-columns: 1fr; } }

/* Features */
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.feature {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: grid; grid-template-columns: 48px 1fr; gap: 18px; align-items: start;
}
.feature .icon { width: 48px; height: 48px; border-radius: 12px; background: var(--accent-soft); color: var(--accent-strong); display: grid; place-items: center; }
.feature .icon svg { width: 24px; height: 24px; }
.feature p { color: var(--ink-2); margin: 8px 0 0; }
.feature .soon { margin-left: 8px; font-size: 12px; font-weight: 700; color: var(--ink-3); border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; vertical-align: 2px; }
@media (max-width: 760px) { .feature-grid { grid-template-columns: 1fr; } .feature { padding: 22px; } }

/* How it works */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { position: relative; padding: 26px 24px 24px; border-radius: var(--radius); background: var(--bg-card); border: 1px solid var(--line); }
.steps li::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--ink); color: var(--bg); font-weight: 700; font-size: 15px; margin-bottom: 16px;
}
.steps p { color: var(--ink-2); margin: 8px 0 0; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* Claude section */
.claude-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.rubric { display: grid; gap: 12px; }
.rubric-item { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--bg-card); }
.rubric-item b { font-size: 15px; }
.rubric-item span { color: var(--ink-2); font-size: 14px; }
.rubric-item .k { flex: none; width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; font: 700 13px/1 var(--mono); background: var(--bg-soft); color: var(--ink-2); border: 1px solid var(--line); }
@media (max-width: 860px) { .claude-grid { grid-template-columns: 1fr; gap: 32px; } }

/* Status timeline */
.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; max-width: 720px; }
.timeline li { position: relative; padding: 0 0 28px 40px; }
.timeline li::before { content: ""; position: absolute; left: 11px; top: 26px; bottom: 0; width: 2px; background: var(--line); }
.timeline li:last-child::before { display: none; }
.timeline .mark { position: absolute; left: 0; top: 3px; width: 24px; height: 24px; border-radius: 50%; border: 2px solid var(--line); background: var(--bg); display: grid; place-items: center; }
.timeline .done .mark { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.timeline .now .mark { border-color: var(--accent); }
.timeline .now .mark::after { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.timeline .mark svg { width: 14px; height: 14px; }
.timeline b { display: block; font-size: 16px; }
.timeline span { color: var(--ink-2); font-size: 15px; }
.timeline .when { display: inline-block; font-size: 12px; font-weight: 700; color: var(--ink-3); margin-bottom: 2px; letter-spacing: .02em; }

/* FAQ */
.faq { max-width: 760px; display: grid; gap: 12px; }
.faq details { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-card); padding: 0 20px; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 28px 18px 0; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 22px; font-weight: 400; color: var(--ink-3); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 18px; color: var(--ink-2); }

/* CTA band */
.cta-band { text-align: center; }
.cta-box {
  border-radius: 24px; padding: 64px 24px; border: 1px solid var(--line);
  background:
    radial-gradient(600px 220px at 50% 0%, var(--accent-soft), transparent 70%),
    var(--bg-card);
}
.cta-box .lead { margin: 14px auto 0; }
.cta-box .hero-cta { justify-content: center; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 40px; color: var(--ink-3); font-size: 14px; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; }
.footer-inner a { color: var(--ink-2); text-decoration: none; }
.footer-inner a:hover { color: var(--ink); text-decoration: underline; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- App page ---------- */
.app-main { padding: 40px 0 80px; }
.app-title { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; margin-bottom: 8px; }
.app-title h1 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-3); }
.pill.open { color: var(--accent-strong); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); background: var(--accent-soft); }
.pill.closed { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, var(--line)); background: var(--warn-soft); }
.banner { margin: 20px 0 0; padding: 14px 16px; border-radius: var(--radius-sm); background: var(--warn-soft); color: var(--ink); border: 1px solid color-mix(in srgb, var(--warn) 30%, var(--line)); font-size: 15px; }
.banner a { color: var(--warn); font-weight: 600; }
.banner[hidden] { display: none; }

.app-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; margin-top: 28px; align-items: start; }
@media (max-width: 960px) { .app-grid { grid-template-columns: 1fr; } }
.panel { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.panel h2 { font-size: 1.05rem; letter-spacing: -.01em; }

.field { display: grid; gap: 8px; margin-top: 18px; }
.field:first-child { margin-top: 0; }
.field label, .field .label { font-weight: 600; font-size: 14px; }
.field .hint { color: var(--ink-3); font-size: 13px; font-weight: 400; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }

input[type="text"], input[type="password"], select, textarea {
  width: 100%; font: 15px/1.5 var(--font); color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 11px 13px;
}
textarea { resize: vertical; min-height: 120px; }
textarea.code { font-size: 13.5px; line-height: 1.6; min-height: 240px; tab-size: 4; white-space: pre; overflow-wrap: normal; overflow-x: auto; }
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 55%, transparent); outline-offset: 0; border-color: var(--accent); }
.counter { justify-self: end; color: var(--ink-3); font: 12px/1 var(--mono); }
.counter.over { color: var(--warn); font-weight: 700; }

.segmented { display: flex; flex-wrap: wrap; gap: 6px; border: 0; padding: 0; margin: 0; }
.segmented legend { padding: 0; margin-bottom: 8px; font-weight: 600; font-size: 14px; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented label {
  display: inline-flex; align-items: center; min-height: 38px; padding: 0 14px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg); font-size: 14px; font-weight: 600; color: var(--ink-2); cursor: pointer;
}
.segmented input:checked + label { border-color: var(--accent); color: var(--accent-strong); background: var(--accent-soft); }
.segmented input:focus-visible + label { outline: 2px solid var(--accent); outline-offset: 2px; }

.form-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 22px; }
.form-status { font-size: 14px; color: var(--ink-3); }
.form-status.error { color: var(--warn); font-weight: 600; }

.output-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.output-empty { color: var(--ink-3); font-size: 15px; border: 1px dashed var(--line); border-radius: var(--radius-sm); padding: 28px 20px; text-align: center; }
.spinner { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--line); border-top-color: var(--accent); animation: spin .8s linear infinite; display: inline-block; vertical-align: -4px; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 2.4s; } html { scroll-behavior: auto; } }

.md { font-size: 15px; line-height: 1.7; }
.md h3 { font-size: 1.02rem; margin: 22px 0 8px; }
.md h3:first-child { margin-top: 0; }
.md h4 { font-size: .96rem; margin: 18px 0 6px; }
.md p { margin: 8px 0; }
.md ul, .md ol { margin: 8px 0; padding-left: 22px; }
.md li { margin: 4px 0; }
.md code { font-size: .88em; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }
.md pre { background: var(--code-bg); color: var(--code-ink); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 1.6; }
.md pre code { background: none; border: 0; padding: 0; font-size: inherit; color: inherit; }
.privacy-note { color: var(--ink-3); font-size: 13px; margin: 16px 0 0; }

/* 404 */
.notfound { min-height: 60vh; display: grid; place-items: center; text-align: center; }
.notfound .code { font: 700 64px/1 var(--mono); color: var(--accent); }
.notfound p { color: var(--ink-2); }

.md hr { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }