/* ============================================================
   தமிழ் தா கெத்து — TamilScript Docs
   Design tokens
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Catamaran:wght@400;600;700;800;900&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  /* palm-leaf / kumkum palette */
  --bg:            #0b0805;
  --bg-soft:       #120d08;
  --surface:       #17110b;
  --surface-2:     #1d1610;
  --border:        rgba(224, 165, 88, 0.16);
  --border-strong: rgba(224, 165, 88, 0.32);

  --accent:        #e6812c; /* marigold / saffron */
  --accent-soft:   rgba(230, 129, 44, 0.14);
  --ember:         #b8390f; /* kumkum red */
  --gold:          #d7a92e; /* turmeric gold */
  --leaf:          #7a8c4a; /* dried palm-leaf green, used sparingly */

  --text:          #f4ecda;
  --text-dim:      #cabfa8;
  --text-mute:     #8c8271;

  --code-bg:       #0f0a06;
  --code-border:   rgba(224, 165, 88, 0.14);

  --font-display:  'Catamaran', 'Noto Sans Tamil', sans-serif;
  --font-body:     'Inter', 'Catamaran', sans-serif;
  --font-mono:     'JetBrains Mono', ui-monospace, monospace;

  --radius:        14px;
  --radius-sm:     8px;
  --container:     1180px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* palm-leaf grain texture, ambient, very subtle */
body::before{
  content:"";
  position: fixed; inset:0;
  pointer-events:none;
  z-index:0;
  background:
    repeating-linear-gradient(180deg, rgba(224,165,88,0.02) 0px, rgba(224,165,88,0.02) 1px, transparent 1px, transparent 3px),
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(230,129,44,0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 0%, rgba(184,57,15,0.08), transparent 55%);
}

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display:block; }
ul{ margin:0; padding:0; list-style:none; }

.wrap{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

/* ---------- focus ---------- */
a:focus-visible, button:focus-visible, summary:focus-visible{
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- top nav ---------- */
.topnav{
  position: sticky; top:0; z-index: 50;
  background: rgba(11,8,5,0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topnav .wrap{
  display:flex; align-items:center; justify-content: space-between;
  height: 68px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.2px;
}
.brand .brand-ta{
  color: var(--accent);
  font-size: 1.3rem;
}
.brand .brand-mark{
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(145deg, var(--accent), var(--ember));
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display); font-weight:900; color:#0b0805; font-size:0.95rem;
  box-shadow: 0 4px 14px rgba(230,129,44,0.35);
}
.nav-links{
  display:flex; gap: 28px; align-items:center;
}
.nav-links a{
  font-size: 0.92rem; color: var(--text-dim); font-weight:500;
  padding: 6px 2px; border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.nav-links a:hover, .nav-links a.active{ color: var(--text); border-color: var(--accent); }
.nav-cta{
  background: var(--accent);
  color: #180f06 !important;
  padding: 9px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.88rem;
}
.nav-cta:hover{ background: var(--gold); }
.nav-toggle{
  display:none;
  background:none; border:1px solid var(--border-strong); border-radius:8px;
  width:40px; height:40px; color: var(--text); cursor:pointer;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor:pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
}
.btn-primary{
  background: linear-gradient(135deg, var(--accent), var(--ember));
  color: #170e06;
  box-shadow: 0 10px 30px rgba(230,129,44,0.25);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 14px 34px rgba(230,129,44,0.35); }
.btn-ghost{
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); }

/* ---------- eyebrow / leaf label ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  padding: 5px 12px 5px 8px;
  border-radius: 999px;
}
.eyebrow .dot{ width:6px; height:6px; border-radius:50%; background: var(--gold); }

/* ============================================================
   HERO
   ============================================================ */
.hero{
  padding: 96px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero .wrap{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items:center;
}
.hero-tamil{
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  line-height: 1.08;
  margin: 18px 0 6px;
  background: linear-gradient(135deg, #f4ecda 20%, var(--gold) 60%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-en{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--text-dim);
  margin: 0 0 22px;
}
.hero p.lede{
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 52ch;
  margin: 0 0 32px;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom: 34px;}
.hero-stats{ display:flex; gap: 30px; flex-wrap:wrap; }
.hero-stats div{ display:flex; flex-direction:column; }
.hero-stats b{ font-family: var(--font-display); font-size: 1.4rem; color: var(--accent); }
.hero-stats span{ font-size: 0.8rem; color: var(--text-mute); }

/* code preview card, the "signature" visual: an olai (palm-leaf) coded strip */
.leaf-card{
  position: relative;
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 0;
  box-shadow: 0 30px 70px rgba(0,0,0,0.55);
  overflow: hidden;
}
.leaf-card::before, .leaf-card::after{
  content:"";
  position:absolute; top: 50%; transform: translateY(-50%);
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border-strong);
}
.leaf-card::before{ left: -7px; }
.leaf-card::after{ right: -7px; }
.leaf-card .leaf-head{
  display:flex; align-items:center; justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(230,129,44,0.05);
}
.leaf-head .dots{ display:flex; gap:6px; }
.leaf-head .dots span{ width:9px; height:9px; border-radius:50%; background: var(--border-strong); }
.leaf-head .fname{ font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-mute); }
.leaf-card pre{
  margin:0; padding: 22px 24px 26px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.75;
  overflow-x:auto;
}

/* ============================================================
   SECTION SHELL
   ============================================================ */
.section{ padding: 78px 0; border-top: 1px solid var(--border); }
.section-head{ max-width: 640px; margin: 0 0 40px; }
.section-head h2{
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 800;
  margin: 14px 0 12px;
}
.section-head p{ color: var(--text-dim); font-size: 1rem; }

/* ============================================================
   CARD GRID (home)
   ============================================================ */
.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
  position: relative;
}
.card:hover{
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 20px 40px rgba(0,0,0,0.35);
}
.card .num{
  font-family: var(--font-mono);
  color: var(--gold);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}
.card h3{
  font-family: var(--font-display);
  font-size: 1.18rem;
  margin: 10px 0 6px;
  display:flex; align-items:baseline; gap:8px; flex-wrap:wrap;
}
.card h3 .ta{ color: var(--accent); font-size: 1.05rem; }
.card p{ color: var(--text-dim); font-size: 0.92rem; margin: 0 0 16px; }
.card .card-link{
  font-size: 0.85rem; font-weight:700; color: var(--accent);
  display:inline-flex; align-items:center; gap:6px;
}
.card-icon{
  width: 42px; height:42px; border-radius: 10px;
  display:flex; align-items:center; justify-content:center;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  margin-bottom: 14px;
  font-size: 1.2rem;
}

/* feature list variant (icon-forward, no numbers — non-sequential) */
.feat-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.feat{
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.feat h4{ font-family: var(--font-display); font-size: 1.02rem; margin: 12px 0 6px; }
.feat p{ font-size: 0.88rem; color: var(--text-dim); margin:0; }

/* ============================================================
   FOOTER
   ============================================================ */
footer{
  border-top: 1px solid var(--border);
  padding: 40px 0;
  color: var(--text-mute);
  font-size: 0.85rem;
}
footer .wrap{ display:flex; justify-content: space-between; align-items:center; flex-wrap:wrap; gap:12px;}

/* ============================================================
   TUTORIAL LAYOUT
   ============================================================ */
.tut-shell{
  display:grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items:start;
  padding: 40px 0 100px;
}
.toc{
  position: sticky; top: 92px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 18px;
  max-height: calc(100vh - 120px);
  overflow-y:auto;
}
.toc-title{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform:uppercase;
  color: var(--text-mute);
  margin: 4px 8px 12px;
}
.toc a{
  display:flex; align-items:center; gap:10px;
  font-size: 0.88rem;
  color: var(--text-dim);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.toc a .n{ font-family: var(--font-mono); color: var(--text-mute); font-size:0.78rem; width: 18px; }
.toc a:hover{ background: rgba(230,129,44,0.06); color: var(--text); }
.toc a.active{ background: var(--accent-soft); color: var(--accent); border-left-color: var(--accent); font-weight:600; }

.tut-main{ min-width:0; }
.tut-topbar{
  display:flex; align-items:center; justify-content: space-between;
  margin-bottom: 24px; flex-wrap:wrap; gap:14px;
}
.tut-title{
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  margin: 8px 0 10px;
}
.tut-lede{ color: var(--text-dim); max-width: 68ch; }

.doc-section{
  padding: 44px 0;
  border-top: 1px solid var(--border);
  scroll-margin-top: 90px;
}
.doc-section:first-of-type{ border-top: none; padding-top: 8px; }
.doc-section .num{
  font-family: var(--font-mono);
  color: var(--gold);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}
.doc-section h2{
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  margin: 10px 0 14px;
  display:flex; align-items:baseline; gap:10px; flex-wrap:wrap;
}
.doc-section h2 .ta{ color: var(--accent); font-weight:800; }
.doc-section p{ color: var(--text-dim); margin: 0 0 16px; max-width: 74ch; }
.doc-section h3{
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 26px 0 10px;
  color: var(--text);
}

.kw-list{ display:flex; flex-wrap:wrap; gap:10px; margin: 6px 0 20px; }
.kw{
  display:flex; align-items:baseline; gap:8px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.86rem;
}
.kw .ta{ font-family: var(--font-display); font-weight:700; color: var(--accent); font-size:0.98rem; }
.kw .en{ color: var(--text-mute); font-size: 0.78rem; }

.table-wrap{ overflow-x:auto; margin: 6px 0 22px; border:1px solid var(--border); border-radius: var(--radius-sm); }
table{ width:100%; border-collapse: collapse; font-size: 0.88rem; }
th, td{ text-align:left; padding: 11px 14px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th{ color: var(--text-mute); font-weight:600; font-family: var(--font-mono); font-size:0.75rem; letter-spacing:.06em; text-transform:uppercase; background: var(--surface); }
td .ta{ color: var(--accent); font-weight:600; }
tr:last-child td{ border-bottom:none; }

/* code block */
.code-card{
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  background: var(--code-bg);
  margin: 8px 0 22px;
  overflow:hidden;
}
.code-card .code-head{
  display:flex; align-items:center; justify-content: space-between;
  padding: 10px 16px;
  background: rgba(230,129,44,0.06);
  border-bottom: 1px solid var(--code-border);
}
.code-head .label{ font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-mute); letter-spacing:.05em;}
.copy-btn{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 4px 10px;
  cursor:pointer;
}
.copy-btn:hover{ color: var(--accent); border-color: var(--accent); }
.code-card pre{
  margin:0; padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 0.87rem;
  line-height: 1.8;
  overflow-x:auto;
}
.code-card code{ white-space: pre; }

/* token colors for hand-highlighted code */
.tk-kw{ color: var(--accent); font-weight:600; }
.tk-str{ color: var(--leaf); }
.tk-num{ color: var(--gold); }
.tk-cmt{ color: var(--text-mute); font-style: italic; }
.tk-fn{ color: #8fb3e0; }

.output-card{
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: rgba(122,140,74,0.06);
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #c9d6ab;
  margin: 0 0 22px;
}
.output-card .label{
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing:.1em;
  text-transform:uppercase; color: var(--leaf); display:block; margin-bottom:8px;
}

.note{
  border-left: 3px solid var(--gold);
  background: rgba(215,169,46,0.06);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.88rem;
  color: var(--text-dim);
  margin: 0 0 22px;
}
.note b{ color: var(--gold); }

.prevnext{
  display:flex; justify-content: space-between; gap: 16px; margin-top: 50px;
  padding-top: 30px; border-top: 1px solid var(--border);
}
.prevnext a{
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 0.86rem;
  max-width: 46%;
}
.prevnext a:hover{ border-color: var(--accent); }
.prevnext .dir{ display:block; color: var(--text-mute); font-family: var(--font-mono); font-size:0.7rem; text-transform:uppercase; margin-bottom:4px;}
.prevnext .next{ text-align:right; margin-left:auto; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px){
  .hero .wrap{ grid-template-columns: 1fr; }
  .grid{ grid-template-columns: repeat(2,1fr); }
  .feat-grid{ grid-template-columns: repeat(2,1fr); }
  .tut-shell{ grid-template-columns: 1fr; }
  .toc{ position: static; max-height:none; }
}
@media (max-width: 640px){
  .nav-links{
    position:fixed; top:68px; left:0; right:0;
    background: var(--bg-soft); border-bottom:1px solid var(--border);
    flex-direction:column; align-items:flex-start; padding: 16px 24px; gap:16px;
    transform: translateY(-140%); transition: transform .2s ease;
  }
  .nav-links.open{ transform: translateY(0); }
  .nav-toggle{ display:block; }
  .grid{ grid-template-columns: 1fr; }
  .feat-grid{ grid-template-columns: 1fr; }
  .prevnext{ flex-direction:column; }
  .prevnext a{ max-width:100%; }
  .prevnext .next{ text-align:left; }
}