/* 레이아웃 개념: 갤러리 벽처럼 비우고, 근거가 나오는 곳은 장부(ledger)처럼 정확하게 — 넓은 여백 + 얇은 선 + 표 */
:root {
  --wall: #ffffff;        /* 명품 하우스처럼 순백 */
  --paper: #ffffff;       /* 표·양식 바탕 */
  --ink: #111111;         /* 검정 글자 */
  --ink-soft: #6b6b6b;    /* 보조 글자 */
  --rule: #e2e2e2;        /* 얇은 선 */
  --accent: #17171b;      /* 강조도 먹색 — 분홍 글자 쓰지 않음 */
  --accent-ink: #ffffff;  /* 먹색 버튼 위 글자 */
  --tint: #f4f4f4;        /* 옅은 회색 바탕 */

  --font-display: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif; /* 검정 고딕 — 명품 하우스식 */
  --font-body: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --font-data: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-2: 1.6rem;
  --step-3: clamp(1.9rem, 1.4rem + 2vw, 2.6rem);
  --step-4: clamp(2.4rem, 1.6rem + 3.6vw, 4rem);

  --wrap: 1120px;
  --gutter-l: max(20px, env(safe-area-inset-left, 0px));
  --gutter-r: max(20px, env(safe-area-inset-right, 0px));
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --wall: #131316; --paper: #1b1b20; --ink: #ececef; --ink-soft: #a6a7b0;
    --rule: #34353c; --accent: #ececef; --accent-ink: #131316; --tint: #24252b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --wall: #131316; --paper: #1b1b20; --ink: #ececef; --ink-soft: #a6a7b0;
  --rule: #34353c; --accent: #ececef; --accent-ink: #131316; --tint: #24252b;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--wall);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.65;
  word-break: keep-all;
  overflow-wrap: break-word;
}
body::before {
  content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px);
  z-index: 30; background: var(--wall);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px;
}
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.3; text-wrap: balance; margin: 0; letter-spacing: -0.025em; }
p { margin: 0; }
.num { font-variant-numeric: tabular-nums; }

/* 한 줄 폭 */
.wrap {
  max-width: var(--wrap); margin: 0 auto;
  padding-left: var(--gutter-l); padding-right: var(--gutter-r);
}
.measure { max-width: 38em; }

/* ── 머리 ── */
.site-head {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--wall) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-head .wrap { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; flex-shrink: 0; }
.brand b { font-family: var(--font-body); font-weight: 700; letter-spacing: 0.24em; font-size: 1rem; }
.brand b i { font-style: normal; }
.brand span { font-size: var(--step--1); color: var(--ink-soft); }
.nav { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav a { text-decoration: none; font-size: 0.95rem; color: var(--ink-soft); white-space: nowrap; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--accent); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 0.95rem/1 var(--font-body); text-decoration: none; cursor: pointer;
  padding: 14px 22px; border: 1px solid var(--ink); background: transparent; color: var(--ink);
  border-radius: 2px; transition: background .15s, color .15s;
}
.btn:hover { background: var(--ink); color: var(--wall); }
.btn.solid { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.solid:hover { opacity: 0.85; }
.nav .btn { padding: 10px 16px; color: var(--accent-ink); }
.menu { display: none; margin-left: auto; position: relative; }
.menu summary { list-style: none; cursor: pointer; font-size: 0.95rem; padding: 8px 4px; }
.menu summary::-webkit-details-marker { display: none; }
.menu nav {
  position: absolute; right: 0; top: calc(100% + 10px); width: min(78vw, 280px);
  background: var(--paper); border: 1px solid var(--rule); padding: 8px 0; display: grid;
}
.menu nav a { padding: 12px 18px; text-decoration: none; }
.menu nav a.cta { color: var(--accent); font-weight: 600; }
@media (max-width: 980px) { .nav { display: none; } .menu { display: block; } }

/* ── 구역 ── */
.section { padding-block: clamp(64px, 9vw, 120px); }
.section + .section { border-top: 1px solid var(--rule); }
.eyebrow {
  font-family: var(--font-body); font-weight: 500; font-size: 0.8rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-soft); margin-bottom: 18px; display: block;
}
.section h2 { font-size: var(--step-3); margin-bottom: 20px; }
.lede { font-size: var(--step-1); color: var(--ink-soft); line-height: 1.7; }
.stack { display: grid; gap: 20px; }

/* ── 첫 화면 ── */
.hero { padding-block: clamp(56px, 8vw, 104px) clamp(48px, 7vw, 88px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { font-size: var(--step-4); line-height: 1.22; font-weight: 500; letter-spacing: -0.035em; }
.page-head h1 { font-weight: 500; letter-spacing: -0.035em; }
.brand { flex-direction: column; gap: 0; align-items: flex-start; line-height: 1.25; }
.brand span { font-size: 0.72rem; letter-spacing: 0.1em; }
.hero h1 em { font-style: normal; text-decoration: underline; text-decoration-thickness: 3px; text-underline-offset: 0.18em; }
.hero .lede { margin-top: 24px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }

/* 장부 (Art Price Calculator 형식) */
.ledger { background: var(--paper); border: 1px solid var(--ink); font-size: 0.92rem; min-width: 0; }
.ledger header {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap;
  padding: 14px 18px; border-bottom: 1px solid var(--ink);
}
.ledger header b { font-family: var(--font-data); letter-spacing: 0.04em; }
.ledger header small { color: var(--ink-soft); font-family: var(--font-data); }
.ledger ol { list-style: none; margin: 0; padding: 0; counter-reset: row; }
.ledger li {
  display: grid; grid-template-columns: 2.6em minmax(0, 1fr) auto; gap: 10px; align-items: baseline;
  padding: 9px 18px; border-bottom: 1px solid var(--rule);
}
.ledger li:last-child { border-bottom: 0; }
.ledger li .n { font-family: var(--font-body); font-variant-numeric: tabular-nums; color: var(--ink-soft); font-size: 0.8rem; }
.ledger li .g { font-size: 0.78rem; color: var(--ink-soft); white-space: nowrap; }
.ledger li.group { background: var(--tint); font-weight: 600; }
.ledger li.total { background: var(--tint); font-weight: 700; }
.ledger li.total .g { color: var(--ink); }
.ledger footer { padding: 10px 18px; border-top: 1px solid var(--ink); font-size: 0.78rem; color: var(--ink-soft); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* 숫자 띠 */
.figures { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--rule); }
.figures > div { padding: 28px 20px 28px 0; display: grid; gap: 6px; align-content: start; }
.figures > div + div { padding-left: 20px; border-left: 1px solid var(--rule); }
.figures b { font-family: var(--font-display); font-weight: 300; font-size: clamp(2rem, 1.4rem + 2.4vw, 3.2rem); line-height: 1; letter-spacing: -0.02em; }
.figures span { color: var(--ink-soft); font-size: 0.92rem; line-height: 1.5; }
@media (max-width: 760px) {
  .figures { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .figures > div:nth-child(3) { padding-left: 0; border-left: 0; }
  .figures > div:nth-child(n+3) { border-top: 1px solid var(--rule); }
}

/* 두 칸 */
.split { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

/* 단계 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.steps li { padding: 22px 18px 4px 0; display: grid; gap: 8px; align-content: start; }
.steps li + li { padding-left: 18px; border-left: 1px solid var(--rule); }
.steps .k { font-family: var(--font-body); font-variant-numeric: tabular-nums; font-size: 0.8rem; color: var(--ink-soft); }
.steps b { font-family: var(--font-display); font-size: 1.12rem; font-weight: 700; }
.steps p { font-size: 0.92rem; color: var(--ink-soft); line-height: 1.6; }
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; }
  .steps li, .steps li + li { padding: 16px 0; border-left: 0; border-bottom: 1px solid var(--rule); }
}

/* 표 */
.table-wrap { overflow-x: auto; border-top: 1px solid var(--ink); }
table { width: 100%; border-collapse: collapse; font-size: 0.97rem; }
th, td { text-align: left; vertical-align: top; padding: 16px 14px 16px 0; border-bottom: 1px solid var(--rule); }
th { font-weight: 600; }
td + td, th + th { padding-left: 14px; }
thead th { font-family: var(--font-data); font-size: 0.76rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); font-weight: 500; }
.risk td:first-child { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; white-space: nowrap; }

/* 두 단계 검증 */
.checks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border: 1px solid var(--ink); background: var(--paper); }
.checks > div { padding: 28px; display: grid; gap: 14px; align-content: start; min-width: 0; }
.checks > div + div { border-left: 1px solid var(--ink); }
.checks h3 { font-size: var(--step-1); }
.checks ul { margin: 0; padding-left: 1.1em; color: var(--ink-soft); display: grid; gap: 6px; }
.checks .tag { font-family: var(--font-body); font-weight: 500; font-size: 0.8rem; color: var(--ink-soft); letter-spacing: 0.16em; }
.checks-foot { border: 1px solid var(--ink); border-top: 0; padding: 16px 28px; background: var(--tint); font-weight: 600; }
@media (max-width: 760px) { .checks { grid-template-columns: 1fr; } .checks > div + div { border-left: 0; border-top: 1px solid var(--ink); } }

/* 목록 줄 */
.rows { border-top: 1px solid var(--ink); }
.rows > div { display: grid; grid-template-columns: 9em minmax(0, 1fr); gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--rule); align-items: baseline; }
.rows dt, .rows .y { font-family: var(--font-body); font-weight: 500; color: var(--ink-soft); font-size: 0.92rem; line-height: 1.65; font-variant-numeric: tabular-nums; }
.rows dd { line-height: 1.65; }
.rows dd { margin: 0; }
@media (max-width: 600px) { .rows > div { grid-template-columns: 1fr; gap: 4px; } }

/* 함께한 곳 */
.marks { display: flex; flex-wrap: wrap; gap: 10px 28px; color: var(--ink-soft); font-size: 0.98rem; }
.marks span { white-space: nowrap; }

/* 인용 */
.quote { font-family: var(--font-display); font-weight: 500; font-size: var(--step-2); line-height: 1.5; border-left: 2px solid var(--ink); padding-left: 24px; }
.quote cite { display: block; margin-top: 14px; font: 400 0.92rem var(--font-body); color: var(--ink-soft); }

/* 상담 띠 */
.band { background: var(--ink); color: var(--wall); }
.band .wrap { padding-block: clamp(56px, 8vw, 96px); display: flex; flex-wrap: wrap; gap: 28px; align-items: end; justify-content: space-between; }
.band h2 { font-size: var(--step-3); color: var(--wall); }
.band p { color: color-mix(in srgb, var(--wall) 70%, transparent); margin-top: 12px; }
.band .btn { border-color: var(--wall); color: var(--wall); }
.band .btn.solid { color: var(--accent-ink); border-color: var(--accent); }

/* 페이지 머리 */
.page-head { padding-block: clamp(56px, 8vw, 96px) clamp(36px, 5vw, 56px); }
.page-head h1 { font-size: var(--step-4); }
.page-head .lede { margin-top: 20px; }

/* 양식 */
.form { display: grid; gap: 18px; background: var(--paper); border: 1px solid var(--ink); padding: clamp(20px, 4vw, 36px); }
.form .row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 640px) { .form .row2 { grid-template-columns: 1fr; } }
.form label { display: grid; gap: 6px; font-size: 0.92rem; font-weight: 600; }
.form label small { font-weight: 400; color: var(--ink-soft); }
.form input, .form textarea, .form select {
  font: 400 1rem var(--font-body); color: var(--ink); background: var(--wall);
  border: 1px solid var(--rule); border-radius: 2px; padding: 12px 14px; width: 100%;
}
.form textarea { min-height: 120px; resize: vertical; }
.choice { display: flex; flex-wrap: wrap; gap: 8px; border: 0; padding: 0; margin: 0; }
.choice legend { font-size: 0.92rem; font-weight: 600; margin-bottom: 8px; padding: 0; }
.choice label { display: inline-flex; align-items: center; gap: 8px; font-weight: 400; border: 1px solid var(--rule); padding: 10px 14px; cursor: pointer; background: var(--wall); }
.choice input { width: auto; accent-color: var(--accent); }
.choice label:has(input:checked) { border-color: var(--accent); background: var(--tint); }
.note { font-size: 0.88rem; color: var(--ink-soft); }
.done { border: 1px solid var(--accent); background: var(--tint); padding: 16px 18px; }

/* 꼬리 */
.site-foot { border-top: 1px solid var(--rule); padding-block: 48px; font-size: 0.88rem; color: var(--ink-soft); }
.site-foot .wrap { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 32px; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: flex-end; align-content: start; }
.site-foot nav a { text-decoration: none; }
.site-foot p + p { margin-top: 6px; }
@media (max-width: 760px) { .site-foot .wrap { grid-template-columns: 1fr; } .site-foot nav { justify-content: flex-start; } }

/* 떠 있는 상담 버튼 */
.float-cta {
  position: fixed; z-index: 15;
  right: calc(16px + env(safe-area-inset-right, 0px)); bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  box-shadow: 0 6px 20px color-mix(in srgb, var(--ink) 25%, transparent);
}
@media (min-width: 981px) { .float-cta { display: none; } }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }