/* =============================================================================
   கைந்நிலை · Kainnilai — Five Attitudes of Conduct
   Theme: deep twilight indigo / moon-pale ivory / amber-manuscript
   The last of the Eighteen, discovered 1931, fragmentary and luminous
   ============================================================================= */

:root {
  /* Primary palette */
  --kn-indigo:      #1e1f3a;   /* deep twilight body */
  --kn-indigo-mid:  #2d2f5e;   /* mid indigo accent */
  --kn-violet:      #4a3d7a;   /* warm violet highlight */
  --kn-amber:       #b87a18;   /* manuscript amber */
  --kn-moon:        #e8e4d4;   /* moon-pale text/card */
  --kn-mist:        #8a8aaa;   /* muted lavender-grey */
  --kn-parchment:   #c8c4a8;   /* aged palm-leaf */

  /* Per-tiṇai accent colors */
  --kn-kurinji:  #4a2a7a;   /* mountain violet */
  --kn-mullai:   #1a3a4a;   /* forest midnight */
  --kn-marutam:  #7a3a18;   /* river-clay */
  --kn-neytal:   #1a3060;   /* sea-deep navy */
  --kn-palai:    #5a3018;   /* wasteland umber */

  /* Override base vars */
  --ink-primary:    var(--kn-moon);
  --ink-secondary:  var(--kn-parchment);
  --ink-tertiary:   var(--kn-mist);
  --bg-page:        var(--kn-indigo);
  --bg-card:        #26274a;
  --bg-card-hover:  #2e306a;
  --accent-primary: var(--kn-amber);
  --border-subtle:  rgba(138,138,170,0.18);
  --shadow-card:    0 2px 18px rgba(10,8,28,0.55);
}

/* ── Body background — deep twilight indigo ──────────────────────────────── */
body {
  background: var(--kn-indigo);
  color: var(--ink-primary);
}
body::before {
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent 0px, transparent 3px,
      rgba(138, 138, 170, 0.03) 3px, rgba(138, 138, 170, 0.03) 4px
    ),
    repeating-linear-gradient(
      0deg,
      transparent 0px, transparent 60px,
      rgba(138, 138, 170, 0.04) 60px, rgba(138, 138, 170, 0.04) 61px
    );
}

/* ── Page header ─────────────────────────────────────────────────────────── */
.site-header {
  background: linear-gradient(160deg, #0e0f20 0%, var(--kn-indigo-mid) 100%);
  border-bottom: 1px solid var(--border-subtle);
}

.site-title-tamil {
  color: var(--kn-moon);
}

.site-title-english {
  color: var(--kn-mist);
}

/* ── Hero / intro block ──────────────────────────────────────────────────── */
.work-intro h1 {
  color: var(--kn-moon) !important;
  text-shadow: 0 1px 24px rgba(72,60,122,0.55);
}

.work-intro h2 {
  color: var(--kn-amber) !important;
}

.era-line {
  color: var(--kn-mist) !important;
}

/* ── Tiṇai legend ────────────────────────────────────────────────────────── */
.thinai-legend {
  background: rgba(45,47,94,0.55);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  backdrop-filter: blur(4px);
}

.legend-item {
  border-left: 3px solid var(--kn-amber);
  padding-left: 0.75rem;
  margin-bottom: 0.6rem;
}

/* ── Section dividers ────────────────────────────────────────────────────── */
.thinai-section-header {
  color: var(--kn-amber);
  border-bottom: 1px solid rgba(184,122,24,0.28);
  letter-spacing: 0.25em;
  font-size: 0.75rem;
  text-transform: uppercase;
  padding-bottom: 0.4rem;
  margin: 2.5rem 0 1.2rem;
}

/* ── Poem grid tiles ─────────────────────────────────────────────────────── */
.poem-tile {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 1.25rem 1.1rem 1rem;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  box-shadow: var(--shadow-card);
}

.poem-tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(10,8,28,0.7);
  border-color: var(--kn-amber);
  background: var(--bg-card-hover);
}

.poem-tile-num {
  font-family: var(--font-display);
  font-size: 0.72rem;
  color: var(--kn-amber);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.poem-tile-turai {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--ink-secondary);
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.poem-tile-speaker {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--kn-mist);
  font-style: italic;
}

/* Tiṇai-specific tile accent lines */
.poem-tile[data-thinai="kurinji"]  { border-top: 2.5px solid var(--kn-kurinji); }
.poem-tile[data-thinai="mullai"]   { border-top: 2.5px solid var(--kn-mullai); }
.poem-tile[data-thinai="marutam"]  { border-top: 2.5px solid var(--kn-marutam); }
.poem-tile[data-thinai="neytal"]   { border-top: 2.5px solid var(--kn-neytal); }
.poem-tile[data-thinai="palai"]    { border-top: 2.5px solid var(--kn-palai); }

/* Fragmentary poem tile */
.poem-tile.fragmentary {
  opacity: 0.72;
  border-style: dashed;
}
.poem-tile.fragmentary .poem-tile-num::after {
  content: " ·  fragment";
  color: var(--kn-mist);
  font-style: italic;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
}

/* ── Poem reader (poem.html) ─────────────────────────────────────────────── */
.poem-page-header {
  background: linear-gradient(160deg, #0e0f20 0%, var(--kn-indigo-mid) 100%);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.2rem 1.5rem 1rem;
}

.poem-thinai-banner {
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--kn-amber);
  margin-bottom: 0.6rem;
}

.poem-num-display {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--kn-moon);
  line-height: 1;
  margin-bottom: 0.3rem;
  opacity: 0.18;
}

.poem-turai-display {
  font-family: var(--font-tamil);
  font-size: 1.15rem;
  color: var(--kn-moon);
  line-height: 1.4;
}

.poem-turai-english {
  font-size: 0.88rem;
  color: var(--kn-mist);
  font-style: italic;
  margin-top: 0.2rem;
}

/* Palm-leaf card */
.palm-leaf-card {
  background: linear-gradient(170deg, #1a1a30 0%, #22204a 100%);
  border: 1px solid rgba(184,122,24,0.22);
  border-radius: 12px;
  padding: 2rem 1.75rem 1.75rem;
  box-shadow: 0 4px 28px rgba(10,8,28,0.6);
  margin-bottom: 1.5rem;
}

.tamil-text {
  font-family: var(--font-tamil);
  font-size: 1.35rem;
  line-height: 2;
  color: var(--kn-moon);
  letter-spacing: 0.01em;
}

/* Layer tabs */
.layer-tabs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

.layer-tab {
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--kn-mist);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.15s ease;
  letter-spacing: 0.06em;
}

.layer-tab.active,
.layer-tab:hover {
  background: var(--kn-amber);
  color: var(--kn-indigo);
  border-color: var(--kn-amber);
}

/* Navigation */
.poem-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-top: 1px solid var(--border-subtle);
  margin-top: 1.5rem;
}

.poem-nav a {
  color: var(--kn-amber);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  transition: opacity 0.15s;
}

.poem-nav a:hover { opacity: 0.75; }

/* Fragmentary notice */
.fragmentary-notice {
  background: rgba(74,61,122,0.25);
  border: 1px dashed rgba(184,122,24,0.4);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  font-size: 0.82rem;
  color: var(--kn-mist);
  font-style: italic;
  margin-bottom: 1rem;
}

/* ── About page ──────────────────────────────────────────────────────────── */
.about-prose h2 {
  color: var(--kn-amber);
  border-bottom: 1px solid rgba(184,122,24,0.2);
  padding-bottom: 0.4rem;
  margin-top: 2.5rem;
  font-size: 1.1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.about-prose p {
  color: var(--ink-secondary);
  line-height: 1.9;
  font-size: 0.98rem;
  margin-bottom: 1rem;
}

.thinai-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 1.2rem 0;
}

.thinai-table th {
  text-align: left;
  color: var(--kn-amber);
  border-bottom: 1px solid rgba(184,122,24,0.3);
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.thinai-table td {
  padding: 0.55rem 0.75rem;
  color: var(--ink-secondary);
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: top;
}

.thinai-table tr:last-child td { border-bottom: none; }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .poem-num-display { font-size: 2.5rem; }
  .tamil-text { font-size: 1.15rem; }
}