/* ─────────────────────────────────────────────
   K-Map Linker — Site Styles
   "Refined Korean Modernism"
   ───────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght,SOFT@9..144,300..700,0..100&family=Manrope:wght@300;400;500;600;700&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');

:root {
  /* Colors */
  --navy: #0D1B2A;
  --navy-soft: #1B2A3F;
  --paper: #FAF8F3;
  --paper-warm: #F4F0E8;
  --coral: #E63946;
  --blue: #4A6FA5;
  --ink: #1B1B1F;
  --ink-soft: #4A4A52;
  --ink-mute: #8A8A92;
  --hairline: rgba(13, 27, 42, 0.12);
  --hairline-soft: rgba(13, 27, 42, 0.06);

  /* Type scale */
  --font-display: 'Fraunces', 'Pretendard', Georgia, serif;
  --font-body: 'Manrope', 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-kr: 'Pretendard', 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: 'ss01', 'cv11';
}

body.lang-ko { font-family: var(--font-kr); }

/* ── Top Nav ──────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 243, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--hairline-soft);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--navy);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand::before {
  content: '';
  display: inline-block;
  width: 22px;
  height: 22px;
  background: var(--navy);
  border-radius: 6px;
  position: relative;
  flex-shrink: 0;
  background-image:
    radial-gradient(circle at 35% 50%, var(--coral) 0 5px, transparent 5px),
    radial-gradient(circle at 65% 50%, var(--blue) 0 5px, transparent 5px);
}
.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
}
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--coral); }
.lang-switch {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border: 1px solid var(--hairline);
  padding: 6px 12px;
  border-radius: 20px;
  text-decoration: none;
  transition: all 0.2s;
}
.lang-switch:hover {
  border-color: var(--navy);
  color: var(--navy);
}

/* ── Container ────────────────────────────── */
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Hero (Landing) ──────────────────────── */
.hero {
  padding: 96px 24px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74, 111, 165, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--navy);
  margin-bottom: 24px;
  font-variation-settings: 'opsz' 144, 'SOFT' 50;
}
.hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--coral);
  font-variation-settings: 'opsz' 144, 'SOFT' 80;
}
.hero p.lead {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--ink-soft);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.55;
}
.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--navy);
  color: var(--paper);
}
.btn-primary:hover {
  background: #000;
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--navy);
  border-color: var(--hairline);
}
.btn-ghost:hover {
  border-color: var(--navy);
  background: var(--paper-warm);
}

/* ── Features (Landing) ──────────────────── */
.features {
  padding: 64px 0 96px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  overflow: hidden;
}
.feature {
  background: var(--paper);
  padding: 32px 24px;
}
.feature-icon {
  font-size: 24px;
  margin-bottom: 16px;
  display: inline-block;
}
.feature h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--navy);
}
.feature p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ── Article (Privacy / Support) ─────────── */
.article {
  padding: 64px 0 96px;
}
.article-header {
  margin-bottom: 56px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--hairline);
}
.article-header .eyebrow {
  margin-bottom: 16px;
}
.article-header h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin-bottom: 16px;
  font-variation-settings: 'opsz' 144;
}
.article-meta {
  font-size: 13px;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}
.article-body {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}
.article-body h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--navy);
  margin-top: 48px;
  margin-bottom: 16px;
  font-variation-settings: 'opsz' 60;
}
.article-body h2::before {
  content: counter(section, decimal-leading-zero);
  counter-increment: section;
  display: block;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--coral);
  margin-bottom: 8px;
}
.article-body { counter-reset: section; }
.article-body h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.005em;
  color: var(--navy);
  margin-top: 28px;
  margin-bottom: 10px;
}
.article-body p { margin-bottom: 18px; }
.article-body ul,
.article-body ol {
  margin: 0 0 20px 0;
  padding-left: 22px;
}
.article-body li { margin-bottom: 8px; }
.article-body a {
  color: var(--coral);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.article-body a:hover { text-decoration-thickness: 2px; }
.article-body strong { font-weight: 600; color: var(--navy); }
.article-body code {
  background: var(--paper-warm);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  font-family: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
  color: var(--navy);
}

/* ── Data Table (Privacy) ─────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14.5px;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  overflow: hidden;
}
.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}
.data-table th {
  background: var(--paper-warm);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy);
}
.data-table tr:last-child td { border-bottom: 0; }

/* ── Callout ──────────────────────────── */
.callout {
  background: var(--paper-warm);
  border-left: 3px solid var(--coral);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 6px 6px 0;
  font-size: 15px;
}
.callout strong { color: var(--coral); display: block; margin-bottom: 6px; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }

/* ── Screenshots Section ────────────── */
.screenshots {
  padding: 80px 0 96px;
  background: var(--paper);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  position: relative;
  overflow: hidden;
}
.screenshots::before {
  content: '';
  position: absolute;
  top: 30%;
  left: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(74, 111, 165, 0.05) 0%, transparent 60%);
  pointer-events: none;
}
.screenshots-header {
  text-align: center;
  margin-bottom: 64px;
  position: relative;
}
.screenshots-header .eyebrow {
  margin-bottom: 16px;
}
.screenshots-header h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin-bottom: 16px;
}
.screenshots-header h2 em {
  font-style: italic;
  color: var(--coral);
}
.screenshots-header p {
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 560px;
  margin: 0 auto;
}
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  align-items: start;
  position: relative;
}
.screenshot-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.screenshot-item img {
  width: 100%;
  max-width: 240px;
  height: auto;
  display: block;
  margin-bottom: 24px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.screenshot-item:hover img {
  transform: translateY(-6px);
}
/* Stagger phone tilt for visual rhythm */
.screenshot-item:nth-child(1) img { transform: rotate(-2deg); }
.screenshot-item:nth-child(1):hover img { transform: rotate(-2deg) translateY(-6px); }
.screenshot-item:nth-child(3) img { transform: rotate(2deg); }
.screenshot-item:nth-child(3):hover img { transform: rotate(2deg) translateY(-6px); }

.screenshot-item h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--navy);
  margin-bottom: 8px;
}
.screenshot-item p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.55;
  max-width: 240px;
}

@media (max-width: 768px) {
  .screenshots { padding: 56px 0 72px; }
  .screenshots-grid {
    grid-template-columns: 1fr;
    gap: 56px;
    max-width: 320px;
    margin: 0 auto;
  }
  .screenshot-item:nth-child(1) img,
  .screenshot-item:nth-child(3) img { transform: none; }
}

/* ── Footer ───────────────────────────── */
.footer {
  border-top: 1px solid var(--hairline);
  padding: 40px 24px;
  background: var(--navy);
  color: var(--paper);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
}
.footer a {
  color: var(--paper);
  opacity: 0.7;
  text-decoration: none;
  margin-left: 24px;
  transition: opacity 0.2s;
}
.footer a:first-of-type { margin-left: 0; }
.footer a:hover { opacity: 1; }
.footer .copyright {
  opacity: 0.6;
  font-size: 12px;
}

/* ── Responsive ───────────────────────── */
@media (max-width: 640px) {
  .nav-inner { padding: 14px 20px; gap: 12px; }
  .nav-links { gap: 16px; font-size: 13px; }
  .hero { padding: 64px 20px 48px; }
  .container, .container-wide { padding: 0 20px; }
  .article { padding: 48px 0 72px; }
  .article-body h2 { margin-top: 36px; font-size: 22px; }
  .feature { padding: 24px 20px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer a { margin-left: 16px; }
  .data-table { font-size: 13px; }
  .data-table th, .data-table td { padding: 10px 12px; }
}

/* ── Print ────────────────────────────── */
@media print {
  .nav, .footer { display: none; }
  body { background: white; color: black; }
  .article { padding: 0; }
  a { color: black; text-decoration: none; }
}