/* ==========================================================================
   INYEON AI — BLOG STYLESHEET (standalone)
   This file is fully self-contained: it does NOT depend on styles.css.
   Blog pages should link ONLY this file — no styles.css, no body class
   needed. That means the blog never breaks from changes to the main
   site's theme, and every color/spacing rule for the blog lives in one
   place.

   Same visual language as the main site (same fonts, same "thread" accent
   idea) but tuned as a warm light theme instead of the main site's dark
   theme, and only including the components blog pages actually use.
   ========================================================================== */

/* ---- Fonts (Google Fonts) ------------------------------------------------ */
@import url("https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300&family=Karla:wght@300;400;500;600&family=Noto+Serif+KR:wght@300;500&display=swap");

/* ---- Design tokens --------------------------------------------------------
   All blog styling reads from these. Change a value here and it updates
   everywhere in the blog.
---------------------------------------------------------------------------- */
:root {
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-sans: "Karla", ui-sans-serif, system-ui, sans-serif;
  --font-korean: "Noto Serif KR", serif;

  --radius: 0.25rem;

  /* warm parchment page, deep warm ink text, wine/burgundy accent */
  --background: #f4ead9;
  --foreground: #201811;
  --card: #fbf3e6;
  --card-foreground: #201811;

  --thread: #7b1e3a;
  --thread-glow: #9c3655;
  --gold: #a97a34;

  --primary: var(--thread);
  --primary-foreground: #fbf3e6;
  --muted-foreground: #5c4f43;

  --border: rgba(32, 24, 17, 0.14);

  --gradient-veil: radial-gradient(
    120% 80% at 50% 0%,
    rgba(123, 30, 58, 0.14),
    transparent 70%
  );
  --shadow-thread: 0 24px 70px -30px rgba(123, 30, 58, 0.35);
}

/* ---- Reset / base --------------------------------------------------------- */
* {
  box-sizing: border-box;
  border-color: var(--border);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--foreground);
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; }

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}
.wrap-narrow {
  max-width: 48rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}
.wrap-mid {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- Reusable text styles -------------------------------------------------- */
.eyebrow {
  font-size: 0.6875rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--thread);
  font-weight: 600;
  margin: 0;
}

.font-korean { font-family: var(--font-korean); }
.text-thread { color: var(--thread); }
.text-muted { color: var(--muted-foreground); }
.italic { font-style: italic; }

.glow-text {
  color: var(--thread);
  text-shadow: none;
}

.thread-rule {
  height: 1px;
  width: 2.5rem;
  background: linear-gradient(to right, transparent, var(--thread), transparent);
  opacity: 0.7;
}
.thread-rule.wide {
  width: 6rem;
  margin: 2rem auto 0;
}

.veil { background-image: var(--gradient-veil); }

.text-link {
  margin-top: 2rem;
  display: inline-block;
  font-size: 0.875rem;
  color: var(--thread);
  font-weight: 500;
  text-underline-offset: 4px;
}
.text-link:hover { text-decoration: underline; }

/* ---- Buttons --------------------------------------------------------------- */
.btn-primary {
  display: inline-block;
  border-radius: 999px;
  background-color: var(--thread);
  color: var(--primary-foreground);
  padding: 0.9rem 1.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-thread);
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  background-color: #611730;
}

.btn-outline {
  display: inline-block;
  border-radius: 999px;
  border: 1px solid rgba(123, 30, 58, 0.4);
  color: var(--foreground);
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  background: transparent;
  transition: background-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}
.btn-outline:hover {
  background-color: var(--thread);
  color: var(--primary-foreground);
}

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background-color: rgba(244, 234, 217, 0.85);
  backdrop-filter: blur(20px);
}

.header-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo { display: flex; align-items: center; gap: 0.625rem; }
.logo-mark { height: 1.75rem; width: 1.75rem; }
.logo-text { display: flex; align-items: baseline; gap: 0.5rem; }
.logo-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--foreground);
}
.logo-korean {
  font-family: var(--font-korean);
  font-size: 0.75rem;
  color: var(--thread);
}

.main-nav {
  display: none;
  align-items: center;
  gap: 2rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}
.main-nav a { transition: color 0.2s ease; }
.main-nav a:hover,
.main-nav a.active { color: var(--thread); }

@media (min-width: 768px) {
  .main-nav { display: flex; }
}

/* leave room for the fixed header */
main { padding-top: 4.5rem; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border);
  background-color: var(--card);
}

.footer-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 3rem 1.25rem;
  display: grid;
  gap: 2rem;
  font-size: 0.75rem;
  color: var(--muted-foreground);
}
@media (min-width: 768px) {
  .footer-inner { grid-template-columns: repeat(3, 1fr); }
}

.footer-brand { display: flex; align-items: center; gap: 0.5rem; }
.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--foreground);
}
.footer-tagline { margin-top: 0.75rem; max-width: 20rem; line-height: 1.6; }
.footer-nav { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-nav a:hover { color: var(--thread); }

.footer-social { display: flex; align-items: center; gap: 0.75rem; margin-top: 1.25rem; }
.footer-social a {
  display: flex; align-items: center; justify-content: center;
  width: 2rem; height: 2rem; border-radius: 999px;
  border: 1px solid var(--border); color: var(--muted-foreground);
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.footer-social a:hover {
  color: var(--thread);
  border-color: rgba(123, 30, 58, 0.5);
  background-color: rgba(123, 30, 58, 0.1);
}
.footer-social svg { width: 1rem; height: 1rem; fill: currentColor; }

/* ==========================================================================
   SECTIONS
   ========================================================================== */
.section { padding: 6rem 0; }
@media (min-width: 768px) { .section { padding: 7rem 0; } }

.section-bordered {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background-color: var(--card);
}

.section-tight { padding: 5rem 0; }
@media (min-width: 768px) { .section-tight { padding: 6rem 0; } }

.section h2 { margin-top: 1rem; font-size: 2.25rem; }
@media (min-width: 768px) { .section h2 { font-size: 3rem; } }

.text-center { text-align: center; }
.mt-lg { margin-top: 3.5rem; }

/* ---- Meaning / quote-style block (available if a post wants it) --------- */
.meaning-grid {
  display: grid;
  gap: 2.5rem;
  max-width: 72rem;
  margin: 0 auto;
  padding: 5rem 1.25rem;
}
@media (min-width: 768px) {
  .meaning-grid { grid-template-columns: auto 1fr; align-items: center; gap: 5rem; padding: 7rem 1.25rem; }
}
.meaning-mark { font-family: var(--font-korean); font-size: 4.5rem; line-height: 1; color: var(--thread); }
@media (min-width: 768px) { .meaning-mark { font-size: 6rem; } }
.meaning-text { font-family: var(--font-display); font-size: 1.5rem; line-height: 1.6; color: var(--foreground); }
@media (min-width: 768px) { .meaning-text { font-size: 1.875rem; } }

/* ==========================================================================
   CARD GRID (feature cards used in posts and city guides)
   ========================================================================== */
.card-grid {
  margin-top: 3.5rem;
  display: grid;
  gap: 1px;
  overflow: hidden;
  border-radius: 2px;
  border: 1px solid var(--border);
  background-color: var(--border);
}
@media (min-width: 768px) {
  .card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .card-grid.cols-3-lg { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background-color: var(--background);
  padding: 2rem;
  transition: background-color 0.2s ease;
}
.card:hover, a.card:hover { background-color: var(--card); }
.card:hover .thread-rule, a.card:hover .thread-rule { width: 5rem; }
.card h3 { margin-top: 1.5rem; font-size: 1.5rem; line-height: 1.3; }
.card p { margin-top: 1rem; font-size: 0.875rem; line-height: 1.7; color: var(--muted-foreground); }

/* ==========================================================================
   NUMBERED STEPS (available if a post wants a step-by-step layout)
   ========================================================================== */
.steps { margin-top: 3.5rem; }
.step {
  display: grid; gap: 1rem;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}
@media (min-width: 768px) {
  .step { grid-template-columns: 4rem 1fr 1.4fr; align-items: baseline; gap: 2.5rem; }
}
.step-number { font-family: var(--font-display); font-size: 1.875rem; color: var(--thread); }
.step h3 { font-size: 1.5rem; }
.step p { font-size: 0.875rem; line-height: 1.7; color: var(--muted-foreground); }

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */
.faq-list {
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.faq-item { border-bottom: 1px solid var(--border); padding: 1.5rem 0; }
.faq-item:last-child { border-bottom: none; }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--foreground);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .plus {
  flex-shrink: 0;
  color: var(--thread);
  margin-top: 0.25rem;
  transition: transform 0.2s ease;
}
.faq-item[open] summary .plus { transform: rotate(45deg); }
.faq-item .answer {
  margin-top: 1rem;
  max-width: 48rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted-foreground);
}

/* ==========================================================================
   FINAL CTA
   ========================================================================== */
.final-cta {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border);
}
.final-cta-inner {
  position: relative;
  max-width: 48rem;
  margin: 0 auto;
  padding: 6rem 1.25rem;
  text-align: center;
}
@media (min-width: 768px) { .final-cta-inner { padding: 8rem 1.25rem; } }

.final-cta-mark {
  font-family: var(--font-korean);
  font-size: 0.875rem;
  letter-spacing: 0.4em;
  color: var(--thread);
}
.final-cta h2 { margin-top: 1.5rem; font-style: italic; font-size: 2.25rem; }
@media (min-width: 768px) { .final-cta h2 { font-size: 3.75rem; } }
.final-cta p { margin-top: 1.5rem; color: var(--muted-foreground); }
.final-cta .btn-primary { margin-top: 2.5rem; }
.final-cta-note {
  margin-top: 1.25rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted-foreground);
}

/* ==========================================================================
   BLOG-SPECIFIC LAYOUT
   ========================================================================== */

/* ---- Blog index post list ---- */
.post-list { display: flex; flex-direction: column; }
.post-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
}
.post-row:first-child { border-top: none; }
.post-row h3 { margin: 0 0 0.35rem; }
.post-row h3 a { color: var(--foreground); }
.post-row h3 a:hover { color: var(--thread); }
.post-row p { margin: 0; color: var(--muted-foreground); }
.post-date { white-space: nowrap; color: var(--muted-foreground); font-size: 0.85rem; }

/* ---- Long-form article body ---- */
.blog-body { max-width: 760px; margin: 0 auto; line-height: 1.75; color: var(--foreground); }
.blog-body p { margin: 0 0 1.25rem; }
.blog-body h2 { margin: 2.75rem 0 1rem; font-size: 1.5rem; }
.blog-body h3 { margin: 1.75rem 0 0.6rem; font-size: 1.15rem; }
.blog-body ul,
.blog-body ol { margin: 0 0 1.25rem 1.25rem; }
.blog-body li { margin-bottom: 0.4rem; }
.blog-body em.chat-line {
  display: block;
  font-style: italic;
  margin: 0.3rem 0 0.3rem 1rem;
  color: var(--muted-foreground);
}

.blog-meta { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.blog-tag {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.back-link { display: inline-block; margin-top: 0; margin-bottom: 1.5rem; }

.spotlight {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin: 2.5rem 0;
}

.app-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
}
.app-card:first-of-type { border-top: none; }
.app-rank { font-size: 1.5rem; font-weight: 600; color: var(--muted-foreground); min-width: 2.5rem; }
.app-card h3 { margin: 0 0 0.35rem; }
.app-card p { margin: 0; color: var(--muted-foreground); }

.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 2rem;
  font-size: 0.95rem;
}
.compare-table th,
.compare-table td {
  text-align: left;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  vertical-align: top;
  color: var(--foreground);
}
.compare-table th { background: var(--card); font-weight: 600; }