:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-soft: #f4f4f5;
  --border: #e7e5e4;
  --text: #1c1917;
  --text-soft: #78716c;
  --text-mute: #a8a29e;
  --accent: #18181b;
  --green: #16a34a;
  --amber: #d97706;
  --red: #dc2626;
  --identity: #8b5cf6;
  --scarcity: #ec4899;
  --urgency: #f97316;
  --proof: #06b6d4;
  --price: #10b981;
  --authority: #6366f1;
  --recip: #eab308;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  background: var(--bg);
  color: var(--text);
  font-family: Pretendard, "Pretendard Variable", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.55;
  letter-spacing: -0.025em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 920px; margin: 0 auto; padding: 34px 24px 80px; }
.narrow { max-width: 760px; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 42px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text-mute); font-size: 13px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.brand-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-link { padding: 8px 12px; border-radius: 999px; color: var(--text-soft); font-size: 13px; font-weight: 650; }
.nav-link:hover, .nav-link.active { background: var(--surface-soft); color: var(--text); }
.hero-head { margin-bottom: 34px; }
.kicker { color: var(--text-mute); font-size: 13px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 14px; }
h1 { font-size: clamp(34px, 7vw, 62px); line-height: 1.08; letter-spacing: -0.065em; margin-bottom: 16px; }
.lead, .sub { color: var(--text-soft); font-size: clamp(17px, 2.1vw, 21px); line-height: 1.65; max-width: 780px; }
.lead strong, .sub strong { color: var(--text); font-weight: 750; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 17px; border-radius: 12px; font-size: 14px; font-weight: 750; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; font-family: inherit; transition: transform .15s ease, background .15s ease, border-color .15s ease; }
.btn:hover { transform: translateY(-1px); border-color: #d6d3d1; }
.btn.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn.primary:disabled { opacity: .55; cursor: default; transform: none; }
.notice { border: 1px solid var(--border); background: var(--surface-soft); color: var(--text-soft); border-radius: 14px; padding: 12px 14px; font-size: 14px; line-height: 1.55; margin: 18px 0 24px; }
.notice b { color: var(--text); }
.grid { display: grid; gap: 12px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; }
.section { margin-top: 42px; }
h2 { font-size: clamp(25px, 4vw, 34px); line-height: 1.25; letter-spacing: -0.05em; margin-bottom: 16px; }
h3 { font-size: 18px; line-height: 1.35; margin-bottom: 8px; }
p { color: var(--text-soft); font-size: 16px; }
ul { list-style: none; display: grid; gap: 8px; }
li { color: var(--text-soft); font-size: 15px; }
li::before { content: ""; display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--text-mute); margin-right: 9px; transform: translateY(-2px); }
.flow { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.flow-step { min-height: 92px; padding: 13px; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); }
.flow-step b { display: block; font-size: 14px; margin-bottom: 6px; }
.flow-step span { display: block; color: var(--text-soft); font-size: 12px; line-height: 1.45; }
.category-table { width: 100%; border-collapse: collapse; overflow: hidden; }
.category-table th, .category-table td { padding: 12px 10px; border-bottom: 1px solid var(--border); text-align: left; font-size: 14px; }
.category-table th { color: var(--text-mute); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; }
.category-table td { color: var(--text-soft); }
.category-table td:first-child { color: var(--text); font-weight: 750; white-space: nowrap; }
.metric { display: flex; flex-direction: column; gap: 6px; }
.metric .value { color: var(--text); font-size: 30px; line-height: 1; letter-spacing: -0.04em; font-weight: 800; }
.metric .label { color: var(--text-mute); font-size: 13px; }
.footer { margin-top: 60px; padding-top: 18px; border-top: 1px solid var(--border); color: var(--text-mute); font-size: 12px; }
/* Demo page */
.demo-container { max-width: 760px; }
.demo-header { margin-bottom: 30px; }
.demo-header h1 { font-size: 32px; letter-spacing: -0.04em; margin-bottom: 6px; }
.demo-header .sub { font-size: 15px; }
.input-card { position: relative; padding: 20px; }
textarea { width: 100%; min-height: 92px; padding: 0; border: 0; resize: vertical; outline: none; background: transparent; color: var(--text); font: inherit; font-size: 16px; }
textarea::placeholder { color: var(--text-mute); }
.input-row { display: flex; align-items: center; gap: 12px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.toggle { display: inline-flex; align-items: center; gap: 8px; color: var(--text-soft); font-size: 13px; user-select: none; cursor: pointer; }
.toggle input { appearance: none; width: 32px; height: 18px; border-radius: 99px; background: var(--border); position: relative; cursor: pointer; }
.toggle input:checked { background: var(--accent); }
.toggle input::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: var(--surface); transition: transform .2s ease; }
.toggle input:checked::after { transform: translateX(14px); }
.shortcut { flex: 1; text-align: right; color: var(--text-mute); font-size: 12px; }
.subopts { display: flex; flex-direction: column; gap: 8px; padding: 12px 16px; background: var(--surface-soft); border-radius: 12px; margin: 16px 0; color: var(--text-soft); font-size: 12px; }
.subopts-row { display: flex; align-items: center; flex-wrap: wrap; gap: 13px; }
.subopts-label { color: var(--text); font-weight: 750; }
.formula-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding-top: 8px; border-top: 1px dashed var(--border); }
.formula-label { color: var(--text-mute); font-size: 11px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.formula-code { display: inline-block; max-width: 100%; overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 7px; padding: 5px 9px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; color: var(--text); }
.examples { display: flex; flex-wrap: wrap; gap: 6px; margin: 18px 0 32px; }
.chip { padding: 6px 12px; border-radius: 999px; border: 1px solid transparent; background: var(--surface-soft); color: var(--text-soft); font-size: 12px; cursor: pointer; transition: .15s ease; }
.chip:hover, .chip.active { background: var(--surface); color: var(--text); border-color: var(--border); }
#result { display: none; }
#result.show { display: block; }
.hero-result { text-align: center; padding: 18px 24px; margin-bottom: 12px; }
.score { font-size: 44px; font-weight: 800; letter-spacing: -0.04em; line-height: 1; margin: 4px 0; font-variant-numeric: tabular-nums; }
.level { font-size: 14px; color: var(--text-soft); text-transform: uppercase; letter-spacing: .1em; font-weight: 800; }
.level.high { color: var(--red); }
.level.mid { color: var(--amber); }
.level.low { color: var(--green); }
.level.none { color: var(--text-mute); }
.gauge { margin: 10px auto 0; max-width: 360px; height: 6px; border-radius: 999px; background: var(--surface-soft); overflow: hidden; }
.gauge-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--green), var(--amber), var(--red)); transition: width .45s ease; }
.actives { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 999px; background: var(--surface-soft); font-size: 13px; font-weight: 650; }
.tag-dot { width: 6px; height: 6px; border-radius: 50%; }
.cats { display: grid; gap: 6px; }
.cat-row { display: grid; grid-template-columns: 150px 1fr 46px; align-items: center; gap: 14px; padding: 8px 16px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.cat-row.pos { border-color: transparent; }
.cat-row.pos[data-c="사회적_정체성"] { background: color-mix(in srgb, var(--identity) 8%, var(--surface)); }
.cat-row.pos[data-c="희소성"] { background: color-mix(in srgb, var(--scarcity) 8%, var(--surface)); }
.cat-row.pos[data-c="긴급성"] { background: color-mix(in srgb, var(--urgency) 8%, var(--surface)); }
.cat-row.pos[data-c="사회적_증명"] { background: color-mix(in srgb, var(--proof) 8%, var(--surface)); }
.cat-row.pos[data-c="가격비교"] { background: color-mix(in srgb, var(--price) 8%, var(--surface)); }
.cat-row.pos[data-c="권위_신뢰"] { background: color-mix(in srgb, var(--authority) 8%, var(--surface)); }
.cat-row.pos[data-c="호혜성"] { background: color-mix(in srgb, var(--recip) 8%, var(--surface)); }
.cat-name { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 650; white-space: nowrap; }
.cat-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.cat-bar { position: relative; height: 8px; border-radius: 999px; background: var(--surface-soft); overflow: hidden; }
.cat-bar-fill { height: 100%; border-radius: 999px; transition: width .45s ease; }
.cat-bar-thr { position: absolute; top: -3px; bottom: -3px; width: 2px; border-radius: 1px; background: var(--text-mute); opacity: .55; }
.cat-prob { font-size: 13px; text-align: right; color: var(--text-soft); font-variant-numeric: tabular-nums; }
.cat-row.pos .cat-prob { color: var(--text); font-weight: 800; }
.meta { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--border); color: var(--text-mute); font-size: 12px; }
details summary { cursor: pointer; color: var(--text-mute); font-size: 12px; user-select: none; margin-top: 14px; }
details summary:hover { color: var(--text-soft); }
details pre { margin-top: 8px; padding: 14px; border-radius: 10px; overflow: auto; background: var(--surface-soft); color: var(--text); font-size: 12px; }
.error { padding: 16px; border-radius: 12px; background: #fef2f2; color: #991b1b; font-size: 14px; }
.loading { padding: 18px; color: var(--text-soft); text-align: center; }
@media (max-width: 760px) {
  .container { padding: 24px 16px 56px; }
  .grid.two, .grid.three { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cat-row { grid-template-columns: 118px 1fr 42px; gap: 10px; padding: 8px 12px; }
  .cat-name { font-size: 13px; }
  .score { font-size: 38px; }
  .nav { align-items: flex-start; flex-direction: column; }
  .input-row { flex-wrap: wrap; }
  .shortcut { display: none; }
}