/* ============================================================
   YtTag — visual identity
   Concept: the physical "tag" — a stamped label pulled off a
   spool. Ink-charcoal ground, stamped-gold accent, chip-style
   tags that look like actual paper tags rather than generic
   SaaS pills.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@500&display=swap');

:root {
  --ink: #171B1F;
  --ink-soft: #232830;
  --paper: #F4F0E6;
  --paper-dim: #DAD4C4;
  --gold: #D8A13B;
  --gold-deep: #B5822B;
  --teal: #4C8577;
  --line: rgba(244, 240, 230, 0.14);
  --line-dark: rgba(23, 27, 31, 0.12);

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --radius-tag: 4px 12px 4px 12px;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--ink);
  color: var(--paper);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  text-decoration: none;
  color: var(--paper);
  letter-spacing: 0.01em;
}
.logo span { color: var(--gold); }
.site-nav a {
  text-decoration: none;
  color: var(--paper-dim);
  margin-left: 28px;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}
.site-nav a:hover { color: var(--gold); }

/* ---------- Hero ---------- */
.hero {
  background: var(--ink);
  color: var(--paper);
  padding: 72px 0 88px;
  position: relative;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4.2vw, 3rem);
  line-height: 1.15;
  max-width: 780px;
  margin: 0 0 20px;
}
.hero-sub {
  max-width: 620px;
  color: var(--paper-dim);
  font-size: 1.08rem;
  margin: 0 0 40px;
}

.tag-form {
  display: flex;
  gap: 12px;
  max-width: 640px;
  flex-wrap: wrap;
}
#title {
  flex: 1 1 380px;
  padding: 16px 18px;
  font-size: 1rem;
  font-family: var(--font-body);
  border: none;
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
}
#title:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}
#generate-btn {
  padding: 16px 28px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-body);
  background: var(--gold);
  color: var(--ink);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}
#generate-btn:hover { background: var(--gold-deep); }
#generate-btn:active { transform: scale(0.98); }
#generate-btn:focus-visible {
  outline: 3px solid var(--paper);
  outline-offset: 2px;
}
#generate-btn[disabled] { opacity: 0.6; cursor: progress; }

/* ---------- Result area ---------- */
.result-area {
  margin-top: 44px;
  background: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 28px;
  max-width: 780px;
}
.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.result-head h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin: 0;
}
#copy-btn {
  background: transparent;
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 8px 16px;
  border-radius: 5px;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background 0.15s ease, color 0.15s ease;
}
#copy-btn:hover { background: var(--gold); color: var(--ink); }
#copy-btn.copied { background: var(--teal); border-color: var(--teal); color: var(--paper); }

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag-chip {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--paper);
  color: var(--ink);
  padding: 7px 14px;
  border-radius: var(--radius-tag);
  border-left: 3px solid var(--gold);
  white-space: nowrap;
}

.char-count {
  margin: 18px 0 0;
  font-size: 0.85rem;
  color: var(--paper-dim);
}

.error-area {
  margin-top: 24px;
  padding: 14px 18px;
  background: #3A1F1F;
  border-left: 3px solid #C05B5B;
  color: #F4D9D9;
  border-radius: 6px;
  max-width: 640px;
}

/* ---------- How it works ---------- */
.how-it-works {
  padding: 64px 0;
  border-bottom: 1px solid var(--line-dark);
}
.how-it-works h2,
.tips h2,
.faq h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin: 0 0 32px;
}
.steps {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
  max-width: 720px;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 46px;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0; top: 0;
  width: 30px; height: 30px;
  background: var(--gold);
  color: var(--ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
}
.steps strong { display: block; margin-bottom: 4px; }

/* ---------- Tips ---------- */
.tips {
  padding: 64px 0;
  background: var(--paper-dim);
  border-bottom: 1px solid var(--line-dark);
}
.tip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.tip-card {
  background: var(--paper);
  padding: 24px;
  border-radius: 4px 16px 4px 16px;
  border-top: 3px solid var(--teal);
}
.tip-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 10px;
}
.tip-card p { margin: 0; color: #3E3A32; font-size: 0.95rem; }

/* ---------- FAQ ---------- */
.faq { padding: 64px 0 80px; }
.faq-item {
  max-width: 720px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-dark);
}
.faq-item:last-child { border-bottom: none; }
.faq-item h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 8px;
}
.faq-item p { margin: 0; color: #3E3A32; }

/* ---------- Static content pages ---------- */
.page-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 88px;
}
.page-content h1 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  margin-bottom: 24px;
}
.page-content h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-top: 36px;
}
.page-content p { margin-bottom: 16px; }
.page-content a { color: var(--gold-deep); }

/* ---------- Blog ---------- */
.blog-hero {
  background: var(--ink);
  color: var(--paper);
  padding: 56px 0 48px;
}
.blog-hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  margin: 0 0 14px;
  max-width: 700px;
}
.hero-sub-light {
  color: var(--paper-dim);
  max-width: 600px;
  margin: 0;
  font-size: 1.05rem;
}

.blog-list {
  padding: 56px 0 80px;
  display: block;
}
.blog-card {
  max-width: 720px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line-dark);
}
.blog-card:first-child { padding-top: 0; }
.blog-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--gold-deep);
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.blog-card h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 0 0 10px;
}
.blog-card h2 a {
  text-decoration: none;
  color: var(--ink);
}
.blog-card h2 a:hover { color: var(--gold-deep); }
.blog-card p { margin: 0 0 12px; color: #3E3A32; }
.read-more {
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--gold-deep);
}
.read-more:hover { text-decoration: underline; }

.blog-post h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-top: 28px;
  margin-bottom: 10px;
}
.blog-post ul, .blog-post ol {
  padding-left: 22px;
  margin-bottom: 16px;
}
.blog-post li { margin-bottom: 8px; }
.blog-post .blog-meta { margin-bottom: 6px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: var(--paper-dim);
  padding: 56px 0 28px;
}
.footer-cols {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}
.footer-cols .logo { display: inline-block; margin-bottom: 10px; }
.footer-cols p { font-size: 0.9rem; max-width: 280px; }
.footer-cols h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--paper);
  margin: 0 0 12px;
}
.footer-cols a {
  display: block;
  text-decoration: none;
  color: var(--paper-dim);
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.footer-cols a:hover { color: var(--gold); }
.copyright {
  font-size: 0.8rem;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 680px) {
  .site-nav a {
    margin-left: 16px;
    font-size: 0.85rem;
  }

  .footer-cols {
    grid-template-columns: 1fr 1fr;
  }

  .tag-form {
    display: block;
    width: 100%;
    max-width: 100%;
  }

  #title {
    display: block;
    width: 100%;
    height: 50px;
    min-height: 50px;
    max-height: 50px;
    flex: none;
    padding: 12px 14px;
    box-sizing: border-box;
  }

  #generate-btn {
    display: block;
    width: 100%;
    margin-top: 12px;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none; }
}