/* ============================================================
   LuNa — shared design tokens & base styles
   Minimalist, clean, warm. Serif display + grotesk body.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,300;6..72,400;6..72,500;6..72,600&family=Hanken+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* warm palette */
  --bg:        oklch(0.985 0.008 78);   /* warm cream */
  --bg-2:      oklch(0.965 0.012 76);   /* slightly deeper cream */
  --surface:   oklch(1 0 0);            /* card / panel */
  --surface-2: oklch(0.975 0.009 76);
  --ink:       oklch(0.27 0.018 55);    /* warm near-black */
  --ink-soft:  oklch(0.44 0.02 55);
  --muted:     oklch(0.58 0.018 58);
  --faint:     oklch(0.72 0.015 65);
  --border:    oklch(0.905 0.012 72);
  --border-2:  oklch(0.86 0.014 70);

  /* accent — warm terracotta / clay */
  --accent:      oklch(0.63 0.13 42);
  --accent-deep: oklch(0.55 0.13 40);
  --accent-soft: oklch(0.93 0.04 55);
  --accent-tint: oklch(0.965 0.018 60);

  --radius:   14px;
  --radius-lg: 22px;
  --radius-sm: 9px;

  --shadow-sm: 0 1px 2px oklch(0.3 0.03 55 / 0.05), 0 1px 3px oklch(0.3 0.03 55 / 0.04);
  --shadow:    0 4px 14px oklch(0.3 0.03 55 / 0.07), 0 1px 3px oklch(0.3 0.03 55 / 0.05);
  --shadow-lg: 0 18px 50px oklch(0.3 0.03 55 / 0.12), 0 6px 18px oklch(0.3 0.03 55 / 0.07);

  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans:  'Hanken Grotesk', system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, monospace;

  --maxw: 1120px;
  --font-scale: 1;
}

/* ---- dark theme (warm charcoal) ---- */
:root[data-theme="dark"] {
  --bg:        oklch(0.205 0.011 56);
  --bg-2:      oklch(0.245 0.013 56);
  --surface:   oklch(0.262 0.014 56);
  --surface-2: oklch(0.30 0.016 56);
  --ink:       oklch(0.935 0.012 76);
  --ink-soft:  oklch(0.80 0.014 72);
  --muted:     oklch(0.66 0.014 66);
  --faint:     oklch(0.55 0.014 62);
  --border:    oklch(0.34 0.014 60);
  --border-2:  oklch(0.42 0.016 60);

  --accent:      oklch(0.70 0.13 46);
  --accent-deep: oklch(0.78 0.12 50);
  --accent-soft: oklch(0.42 0.07 46);
  --accent-tint: oklch(0.30 0.035 50);

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.30), 0 1px 3px oklch(0 0 0 / 0.22);
  --shadow:    0 4px 14px oklch(0 0 0 / 0.34), 0 1px 3px oklch(0 0 0 / 0.26);
  --shadow-lg: 0 18px 50px oklch(0 0 0 / 0.46), 0 6px 18px oklch(0 0 0 / 0.32);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: calc(17px * var(--font-scale));
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .3s ease, color .3s ease;
}

::selection { background: var(--accent-soft); color: var(--accent-deep); }

/* ---- film grain — subtle warmth on every page ---- */
body::after {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 2000;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.05;
  mix-blend-mode: multiply;
}
:root[data-theme="dark"] body::after { mix-blend-mode: screen; opacity: 0.045; }

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

h1, h2, h3 { font-family: var(--font-serif); font-weight: 400; line-height: 1.08; letter-spacing: -0.012em; }

/* ---- brand: logo tile + wordmark ---- */
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand .logo-mark {
  width: 30px; height: 30px; flex: none; display: block;
  border-radius: 9px;
  box-shadow: 0 1px 2px oklch(0.3 0.06 45 / 0.3), 0 4px 12px -4px color-mix(in oklch, var(--accent) 50%, transparent);
}
.brand:hover .logo-mark { box-shadow: 0 1px 2px oklch(0.3 0.06 45 / 0.3), 0 6px 18px -4px color-mix(in oklch, var(--accent) 65%, transparent); }

/* ---- wordmark ---- */
.wordmark {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 0.04em;
}
.wordmark .lu { color: var(--ink); }
.wordmark .dot {
  display: inline-block;
  width: 0.16em;
  height: 0.16em;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0.45em color-mix(in oklch, var(--accent) 55%, transparent);
  margin-left: 0.12em;
  transform: translateY(-0.08em);
}

/* ---- buttons ---- */
.btn {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 15px;
  border: none;
  border-radius: 999px;
  padding: 11px 22px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background .18s ease, transform .12s ease, box-shadow .18s ease, color .18s ease, border-color .18s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(to bottom, color-mix(in oklch, var(--accent) 86%, white), var(--accent));
  color: oklch(0.99 0.01 80);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.22), 0 1px 2px oklch(0.3 0.06 45 / 0.25);
}
.btn-primary:hover {
  background: linear-gradient(to bottom, color-mix(in oklch, var(--accent-deep) 88%, white), var(--accent-deep));
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.22), 0 8px 22px -6px color-mix(in oklch, var(--accent) 55%, transparent);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--border-2); }
.btn-ghost:hover { background: var(--surface-2); border-color: var(--muted); }
.btn-soft { background: var(--surface); color: var(--ink); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.btn-soft:hover { background: var(--surface-2); }

/* ---- top nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 48px);
  background: color-mix(in oklch, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
.nav.scrolled { border-color: var(--border); box-shadow: 0 6px 24px -12px oklch(0.3 0.03 55 / 0.18); }
.nav-links { display: flex; align-items: center; gap: clamp(14px, 3vw, 34px); }
.nav-link { font-size: 15px; color: var(--ink-soft); transition: color .15s ease; white-space: nowrap; }
.nav-link:hover { color: var(--ink); }

/* ---- lang toggle ---- */
.lang {
  display: inline-flex; align-items: center;
  border: 1px solid var(--border-2); border-radius: 999px;
  padding: 3px; gap: 2px; background: var(--surface);
}
.lang button {
  font-family: var(--font-sans); font-size: 12.5px; font-weight: 600;
  border: none; background: transparent; color: var(--muted);
  padding: 4px 10px; border-radius: 999px; cursor: pointer; letter-spacing: 0.02em;
  transition: background .15s, color .15s;
}
.lang button.on { background: var(--ink); color: var(--bg); }

/* utility */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px, 5vw, 48px); }
.eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-deep);
}
.serif { font-family: var(--font-serif); }
[hidden] { display: none !important; }