/* ==========================================================================
   Judgment Architecture Lab — Shared Stylesheet
   ========================================================================== */

:root {
  --navy: #12151c;
  --charcoal: #1b1f28;
  --panel: #ffffff;
  --off-white: #f7f7f5;
  --gray-light: #ececea;
  --gray-mid: #9a9da3;
  --text-main: #1b1f28;
  --text-muted: #5a5f6b;
  --text-inverse: #f4f4f2;
  --text-inverse-muted: #b7bac2;
  --blue: #3454d1;
  --blue-dark: #24378f;
  --blue-tint: #eef1fc;
  --line: #dedfdd;
  --line-dark: #2c3140;
  --radius: 2px;
  --max-width: 1120px;
  --sans: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text-main);
  background: var(--panel);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--sans);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--text-main);
}

h1 { font-size: 2.6rem; }
h2 { font-size: 1.9rem; }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.05rem; }

p { margin: 0 0 16px; color: var(--text-main); }

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

ul, ol { padding-left: 1.2em; }
li { margin-bottom: 8px; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(18, 21, 28, 0.97);
  border-bottom: 1px solid var(--line-dark);
}

.nav-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--text-inverse);
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.logo .logo-mark {
  display: inline-block;
  width: 9px;
  height: 9px;
  background: var(--blue);
}

.logo small {
  font-weight: 400;
  font-size: 0.62rem;
  color: var(--text-inverse-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 19px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-inverse-muted);
  font-size: 0.82rem;
  font-weight: 500;
  transition: color 0.15s ease;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-inverse);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-cta a.btn-small {
  font-size: 0.82rem;
  padding: 9px 16px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-dark);
  color: var(--text-inverse);
  padding: 6px 10px;
  font-size: 0.9rem;
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-cta .btn-small.desktop-only { display: none; }
  .nav-toggle { display: inline-block; }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 14px 28px;
  border: 1px solid transparent;
  font-size: 0.94rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border-radius: var(--radius);
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--blue-dark); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--line-dark);
  color: var(--text-inverse);
}
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text-main);
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

.btn-block { width: 100%; text-align: center; }

.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

/* ---------- Hero ---------- */

.hero {
  background: var(--navy);
  color: var(--text-inverse);
  padding: 100px 0 90px;
  position: relative;
  border-bottom: 1px solid var(--line-dark);
}

.hero .eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 700;
  margin-bottom: 20px;
}

.hero h1 {
  color: var(--text-inverse);
  font-size: 2.9rem;
  max-width: 780px;
}

.hero p.lead {
  color: var(--text-inverse-muted);
  font-size: 1.12rem;
  max-width: 600px;
  margin-top: 18px;
}

.page-hero {
  background: var(--navy);
  color: var(--text-inverse);
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line-dark);
}

.page-hero .eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 700;
  margin-bottom: 16px;
}

.page-hero h1 { color: var(--text-inverse); font-size: 2.3rem; }
.page-hero p.lead { color: var(--text-inverse-muted); font-size: 1.05rem; max-width: 640px; }

/* ---------- Sections ---------- */

section { padding: 80px 0; }
section.tight { padding: 56px 0; }
section.alt { background: var(--off-white); }
section.dark {
  background: var(--charcoal);
  color: var(--text-inverse);
}
section.dark h2, section.dark h3, section.dark p { color: var(--text-inverse); }
section.dark .text-muted { color: var(--text-inverse-muted); }

.section-head { margin-bottom: 44px; max-width: 720px; }
.section-head .kicker {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 700;
  margin-bottom: 12px;
  display: block;
}
.section-head p { color: var(--text-muted); font-size: 1.02rem; }

.text-muted { color: var(--text-muted); }

hr.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 56px 0;
}

/* ---------- Grid / Cards ---------- */

.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  border: 1px solid var(--line);
  padding: 28px;
  background: var(--panel);
}

.card .num {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  display: block;
}

.card h3 { margin-bottom: 10px; font-size: 1.12rem; }
.card p { color: var(--text-muted); font-size: 0.94rem; margin-bottom: 0; }

.frame-box {
  border: 1px solid var(--line-dark);
  padding: 32px;
}

/* ---------- Flow diagram (Work -> Judgment) ---------- */

.flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 36px 0;
}
.flow .flow-step {
  border: 1px solid var(--line-dark);
  padding: 14px 18px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-inverse);
  white-space: nowrap;
}
.flow .flow-arrow {
  color: var(--blue);
  padding: 0 10px;
  font-size: 1.1rem;
}

/* ---------- Quote / principle block ---------- */

.principle-block {
  border-left: 3px solid var(--blue);
  padding-left: 24px;
  margin: 28px 0;
}
.principle-block p {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}
section.dark .principle-block p { color: var(--text-inverse); }

/* ---------- Forms ---------- */

.form-box {
  border: 1px solid var(--line);
  padding: 40px;
  background: var(--off-white);
}

.form-row { margin-bottom: 20px; }
.form-row label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}
.form-row .req { color: var(--blue); }

.form-row input[type="text"],
.form-row input[type="email"],
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-dark);
  background: #fff;
  font-family: var(--sans);
  font-size: 0.94rem;
  color: var(--text-main);
}

.form-row textarea { resize: vertical; min-height: 110px; }

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.checkbox-row input { margin-top: 4px; }

.checkbox-group { display: flex; flex-wrap: wrap; gap: 10px 20px; }
.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--text-main);
}

.form-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 18px;
}

/* ---------- Lists with markers ---------- */

.check-list { list-style: none; padding-left: 0; }
.check-list li {
  padding-left: 28px;
  position: relative;
  margin-bottom: 12px;
  color: var(--text-main);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--blue);
}

.q-list { list-style: none; padding-left: 0; }
.q-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-weight: 500;
  font-size: 1.02rem;
}
.q-list li:last-child { border-bottom: none; }

/* ---------- Tag pills ---------- */

.tag {
  display: inline-block;
  border: 1px solid var(--line-dark);
  color: var(--text-inverse-muted);
  font-size: 0.76rem;
  padding: 5px 12px;
  margin: 0 8px 8px 0;
}
section:not(.dark) .tag { border-color: var(--line); color: var(--text-muted); }

/* ---------- Newsletter tiers ---------- */

.tier-card {
  border: 1px solid var(--line);
  padding: 30px;
}
.tier-card .tier-name {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
  display: block;
}

/* ---------- Archive preview list ---------- */

.archive-item {
  border: 1px solid var(--line);
  padding: 22px 26px;
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  flex-wrap: wrap;
}
.archive-item .archive-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  white-space: nowrap;
}
.archive-item .archive-title { font-weight: 600; flex: 1; min-width: 220px; }
.archive-item .archive-tag {
  font-size: 0.74rem;
  color: var(--blue);
  border: 1px solid var(--blue);
  padding: 3px 10px;
  white-space: nowrap;
}

/* ---------- FAQ accordion ---------- */

.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-item summary {
  padding: 20px 0;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--blue);
  font-weight: 400;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .faq-answer {
  padding: 0 0 22px;
  color: var(--text-muted);
}

/* ---------- Book connection strip ---------- */

.connect-strip {
  display: flex;
  gap: 0;
  border: 1px solid var(--line-dark);
  overflow: hidden;
}
.connect-strip .step {
  flex: 1;
  padding: 28px 24px;
  border-right: 1px solid var(--line-dark);
}
.connect-strip .step:last-child { border-right: none; }
.connect-strip .step .step-label {
  font-size: 0.72rem;
  color: var(--blue);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}
@media (max-width: 780px) {
  .connect-strip { flex-direction: column; }
  .connect-strip .step { border-right: none; border-bottom: 1px solid var(--line-dark); }
}

/* ---------- CTA banner ---------- */

.cta-banner {
  background: var(--navy);
  color: var(--text-inverse);
  padding: 64px 0;
  text-align: center;
}
.cta-banner h2 { color: var(--text-inverse); }
.cta-banner p { color: var(--text-inverse-muted); max-width: 560px; margin: 0 auto 8px; }
.cta-banner .cta-row { justify-content: center; }

/* ---------- Footer ---------- */

footer.site-footer {
  background: var(--navy);
  color: var(--text-inverse-muted);
  padding: 56px 0 32px;
  border-top: 1px solid var(--line-dark);
  font-size: 0.86rem;
}
footer.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
footer.site-footer h4 {
  color: var(--text-inverse);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
footer.site-footer ul { list-style: none; padding: 0; margin: 0; }
footer.site-footer li { margin-bottom: 10px; }
footer.site-footer a:hover { color: var(--text-inverse); }
footer.site-footer .footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
}
@media (max-width: 780px) {
  footer.site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- misc ---------- */

.badge-outline {
  display: inline-block;
  border: 1px solid var(--blue);
  color: var(--blue);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 10px;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 860px) {
  .two-col { grid-template-columns: 1fr; gap: 32px; }
}

.book-cover-placeholder {
  aspect-ratio: 3 / 4.2;
  border: 1px solid var(--line-dark);
  background: linear-gradient(180deg, var(--charcoal), var(--navy));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
  color: var(--text-inverse);
}
.book-cover-placeholder .bc-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 18px;
}
.book-cover-placeholder .bc-title {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1.4;
}
.book-cover-placeholder .bc-sub {
  margin-top: 16px;
  font-size: 0.86rem;
  color: var(--text-inverse-muted);
}