/* ==========================================================================
   நான்மணிக்கடிகை · Nāṉmaṇikkaṭikai — The Four Gems
   101 ethical quatrains · c. 1st–5th century CE
   Author: Viḷampinilai · Patiṉeṇkīḻkaṇakku collection

   Title: நான்மணிக்கடிகை = "The casket of four gems" —
   nāṉku (four) + maṇi (gem/jewel) + kaṭikai (small box / casket).
   Each verse is a casket holding four moral gems — four things that share
   a single quality or condition, presented with lapidary precision.

   Visual identity: Lapis lazuli — the deep blue of polished stone, the
   colour of the night sky above Tamil country, the hue of precious things
   locked in a casket. Gold inlay for the gem-settings. Sand-stone as the
   warm neutral. The palette is richer, more jewelled than the Iṉṉā/Iṉiyavai
   works: this is a treasury, not a thornbush.

   Mark: four small diamonds arranged as a 2×2 grid — four gems, a casket,
   a fourfold completeness. Simple, lapidary, unmistakable.
   ========================================================================== */

:root {
  /* ── Lapis lazuli (primary) ─────────────────────────── */
  --nm-lapis:         #1a2a5a;
  --nm-lapis-mid:     #2a3a6a;
  --nm-lapis-bright:  #3a52a0;
  --nm-lapis-pale:    rgba(26, 42, 90, 0.10);
  --nm-lapis-pale2:   rgba(26, 42, 90, 0.05);

  /* ── Gold (secondary) ───────────────────────────────── */
  --nm-gold:          #c89820;
  --nm-gold-mid:      #a87810;
  --nm-gold-bright:   #e0b830;
  --nm-gold-pale:     rgba(200, 152, 32, 0.14);
  --nm-gold-pale2:    rgba(200, 152, 32, 0.06);

  /* ── Sand-stone (accent) ────────────────────────────── */
  --nm-sand:          #8a7860;
  --nm-sand-mid:      #6a5840;
  --nm-sand-pale:     rgba(138, 120, 96, 0.12);

  /* ── Warm parchment ─────────────────────────────────── */
  --nm-parchment:     #ede8d8;
  --nm-parchment-mid: #e0d8c4;

  /* ── Deep ink ───────────────────────────────────────── */
  --nm-ink:           #0e1828;
  --nm-ink-mid:       #2a3040;
  --nm-ink-pale:      rgba(14, 24, 40, 0.55);

  /* ── Site overrides ─────────────────────────────────── */
  --accent-vermillion: var(--nm-lapis);
  --accent-kumkum:     var(--nm-lapis-mid);
  --accent-ochre:      var(--nm-gold-mid);
  --accent-gold:       var(--nm-gold);
}

/* Body background: deep night-blue of the casket */
body { background: #9aa0b8; }
body::before {
  background-image:
    radial-gradient(circle at 25% 35%, rgba(26,42,90,0.07) 0%, transparent 55%),
    radial-gradient(circle at 75% 65%, rgba(200,152,32,0.05) 0%, transparent 50%),
    repeating-linear-gradient(
      45deg,
      transparent 0px, transparent 8px,
      rgba(26,42,90,0.014) 8px, rgba(26,42,90,0.014) 9px
    );
}

/* Header */
.site-header { border-bottom-color: rgba(26,42,90,0.22); }
.site-logo .mark { color: var(--nm-gold); }
.wordmark-tamil { color: var(--nm-lapis); }
.site-nav a { color: var(--nm-lapis-mid); }
.site-nav a:hover { color: var(--nm-gold-mid); }
a { color: var(--nm-lapis-mid); }
a:hover { color: var(--nm-lapis-bright); }

/* ---------------------------------------------------------------------------
   Hero
   --------------------------------------------------------------------------- */
.nm-hero {
  text-align: center;
  padding: 3.5rem 2.5rem 2rem;
  max-width: 860px;
  margin: 0 auto;
}
.nm-hero h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  font-weight: 800;
  color: var(--nm-lapis);
  line-height: 1.15;
  margin: 0.7rem 0 0.3rem;
  word-break: break-word;
  overflow-wrap: break-word;
}
.nm-hero-roman {
  font-size: clamp(1.0rem, 2vw, 1.3rem);
  font-style: italic;
  color: var(--nm-ink-mid);
  letter-spacing: 0.04em;
  margin: 0 0 0.4rem;
}
.nm-hero-meaning {
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--nm-gold-mid);
  margin: 0 0 1.2rem;
}
.nm-hero p {
  font-size: 1.0rem;
  line-height: 1.85;
  color: #0e1828;
  margin: 0 0 0.8rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.nm-hero-mark {
  display: inline-block;
  margin-bottom: 0.8rem;
}

/* Stat row */
.nm-stat-row {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin: 1.5rem 0 0.5rem;
  flex-wrap: wrap;
}
.nm-stat { text-align: center; }
.nm-stat-num {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--nm-lapis);
  line-height: 1;
  margin-bottom: 0.2rem;
}
.nm-stat-label {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--nm-sand);
}

/* ---------------------------------------------------------------------------
   Title banner
   --------------------------------------------------------------------------- */
.nm-title-banner {
  max-width: 760px;
  margin: 0 auto 1.5rem;
  background: var(--nm-gold-pale2);
  border: 1px solid rgba(200,152,32,0.18);
  border-left: 4px solid var(--nm-gold);
  border-radius: 0 6px 6px 0;
  padding: 1.1rem 1.5rem;
  font-size: 0.88rem;
  line-height: 1.8;
  color: #0e1828;
}
.nm-title-banner strong { color: var(--nm-gold-mid); }

/* Four gems display */
.nm-four-gems {
  max-width: 760px;
  margin: 0 auto 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 0.8rem;
}
@media (max-width: 560px) { .nm-four-gems { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .nm-hero h1 { font-size: clamp(1.4rem, 6vw, 2rem); } }
@media (max-width: 320px) { .nm-four-gems { grid-template-columns: 1fr; } }
.nm-gem-card {
  background: var(--nm-parchment);
  border: 1px solid rgba(26,42,90,0.14);
  border-radius: 6px;
  padding: 0.9rem 0.8rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.nm-gem-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--nm-lapis-pale), var(--nm-gold), var(--nm-lapis-pale));
}
.nm-gem-num {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--nm-sand);
  margin-bottom: 0.5rem;
}
.nm-gem-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 0.4rem;
  color: var(--nm-gold);
}
.nm-gem-label {
  font-size: 0.78rem;
  color: var(--nm-lapis-mid);
  font-style: italic;
}

/* ---------------------------------------------------------------------------
   Verses header
   --------------------------------------------------------------------------- */
.nm-verses-header {
  max-width: 820px;
  margin: 0 auto 1.5rem;
  padding: 0 1.5rem;
  text-align: center;
}
.nm-verses-header h2 {
  font-size: 1.0rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--nm-lapis);
  margin: 0 0 0.3rem;
}
.nm-verses-header p {
  font-size: 0.85rem;
  color: var(--nm-sand);
  font-style: italic;
  margin: 0;
}

/* ---------------------------------------------------------------------------
   Verse grid
   --------------------------------------------------------------------------- */
.nm-verses-main {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 1rem;
}
@media (max-width: 520px) { .nm-verses-main { grid-template-columns: 1fr; } }

/* Individual verse card */
.nm-verse {
  background: var(--nm-parchment);
  border: 1px solid rgba(26,42,90,0.13);
  border-radius: 6px;
  overflow: hidden;
}
.nm-verse-header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 1rem;
  background: var(--nm-lapis-pale2);
  border-bottom: 1px solid rgba(26,42,90,0.10);
}
.nm-verse-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--nm-gold);
  min-width: 2.2rem;
}
.nm-verse-theme {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--nm-sand);
  flex: 1;
}

/* The four gems — displayed as a 2×2 grid of items */
.nm-quartet {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  padding: 0.7rem 1rem 0.6rem;
  border-bottom: 1px solid rgba(26,42,90,0.08);
}
.nm-quartet-item {
  font-size: 0.75rem;
  color: var(--nm-lapis-mid);
  line-height: 1.45;
  padding: 0.3rem 0.5rem;
  background: var(--nm-lapis-pale2);
  border-radius: 3px;
  text-align: center;
}
.nm-quartet-gem {
  display: block;
  width: 6px;
  height: 6px;
  background: var(--nm-gold);
  margin: 0 auto 0.25rem;
  opacity: 0.75;
  transform: rotate(45deg);
}

/* Expandable layers */
.nm-verse-body { padding: 0 1rem 0.4rem; }
.nm-layer {
  margin: 0;
  border-bottom: 1px solid rgba(26,42,90,0.06);
}
.nm-layer:last-child { border-bottom: none; }
.nm-layer-toggle {
  display: block;
  width: 100%;
  padding: 0.48rem 0;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--nm-sand);
  cursor: pointer;
  user-select: none;
  list-style: none;
  position: relative;
  padding-right: 1rem;
}
.nm-layer-toggle::-webkit-details-marker { display: none; }
.nm-layer-toggle::after {
  content: "›";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  color: var(--nm-gold);
  transition: transform 0.15s;
}
details[open] > .nm-layer-toggle::after { transform: translateY(-50%) rotate(90deg); }
.nm-layer-content { padding: 0 0 0.75rem; }

.nm-tamil-verse {
  font-size: 1.0rem;
  line-height: 2;
  color: #0e1828;
}
.nm-translit-verse {
  font-size: 0.88rem;
  line-height: 2;
  color: #1a2232;
  font-style: italic;
}
.nm-english-prose {
  font-size: 0.87rem;
  line-height: 1.78;
  color: #1a2232;
}
.nm-note {
  font-size: 0.79rem;
  line-height: 1.72;
  color: #2a3040;
  font-style: italic;
}

/* ---------------------------------------------------------------------------
   Page header (about page)
   --------------------------------------------------------------------------- */
.nm-page-header {
  background: var(--nm-lapis-pale2);
  border-bottom: 1px solid rgba(26,42,90,0.14);
  padding: 2rem 1.5rem 1.5rem;
  text-align: center;
}
.nm-page-header-inner { max-width: 720px; margin: 0 auto; }
.nm-page-header h1 { font-size: 1.3rem; color: var(--nm-lapis); margin: 0 0 0.4rem; }
.nm-page-header p { font-size: 0.88rem; color: var(--nm-sand); font-style: italic; margin: 0; }

/* ---------------------------------------------------------------------------
   About page
   --------------------------------------------------------------------------- */
.nm-about-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  font-size: 0.97rem;
  line-height: 1.82;
  color: #0e1828;
}
.nm-about-body h2 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--nm-lapis);
  margin: 2.5rem 0 0.7rem;
  border-bottom: 1px solid rgba(26,42,90,0.15);
  padding-bottom: 0.4rem;
}
.nm-about-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 1rem 0;
}
.nm-about-body th {
  text-align: left;
  padding: 0.5rem 0.8rem;
  background: var(--nm-lapis-pale2);
  color: var(--nm-lapis);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid rgba(26,42,90,0.18);
}
.nm-about-body td {
  padding: 0.5rem 0.8rem;
  border-bottom: 1px solid rgba(26,42,90,0.07);
  vertical-align: top;
}
.nm-about-body tr:last-child td { border-bottom: none; }
.nm-about-body tr.current-row td { background: var(--nm-gold-pale2); }
.nm-about-body blockquote {
  border-left: 3px solid var(--nm-gold);
  margin: 1.2rem 0;
  padding: 0.6rem 1.2rem;
  background: var(--nm-gold-pale2);
  font-style: italic;
  color: #0e1828;
  border-radius: 0 4px 4px 0;
}

/* ---------------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------------- */
@media (max-width: 600px) {
  .nm-stat-row { gap: 1.5rem; }
  .nm-stat-num { font-size: 1.6rem; }
  .nm-quartet { grid-template-columns: 1fr; gap: 0.3rem; }
}