/* ============================================================
   Tangle — shared design system
   Evolved from the Tangle Terminal aesthetic:
   deep cool-black space, warm ink, gold/terracotta accents,
   Cormorant Garamond display + DM Mono labels.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=DM+Mono:ital,wght@0,300;0,400;0,500;1,400&display=swap');

:root {
  /* surfaces */
  --bg:        #0a0b0f;
  --bg-deep:   #07080b;
  --panel:     rgba(0,0,0,0.40);
  --line:      rgba(255,255,255,0.08);
  --line-soft: rgba(255,255,255,0.05);

  /* ink */
  --ink:       #f5f0e8;
  --ink-soft:  #c9c3ba;
  --ink-dim:   #8a8782;
  --ink-faint: #5a6068;
  --ink-mute:  #3a3f4a;

  /* accents */
  --gold:      #d9a55c;   /* bright signal gold */
  --gold-deep: #b8954a;
  --terra:     #c17b4e;   /* terracotta */
  --magenta:   #d24a8c;   /* logo pink core — use sparingly */
  --green:     #1d9e75;
  --red:       #e24b4a;

  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 18px;

  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: 'DM Mono', ui-monospace, monospace;
}

::selection { background: rgba(217,165,92,0.28); color: #fff; }

/* ---- type helpers ---- */
.serif { font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 300; }
.mono  { font-family: 'DM Mono', ui-monospace, monospace; }

.eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

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

/* ============================================================
   Cosmic backdrop — fixed starfield + nebula vignette
   ============================================================ */
.cosmic {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.cosmic .nebula {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(ellipse at 18% 22%, rgba(193,123,78,0.06) 0%, transparent 46%),
    radial-gradient(ellipse at 82% 78%, rgba(26,123,175,0.05) 0%, transparent 46%),
    radial-gradient(ellipse at 60% 10%, rgba(139,123,200,0.035) 0%, transparent 42%);
  opacity: 0.95;
}
.cosmic .star {
  position: absolute;
  border-radius: 50%;
  background: #f5f0e8;
  will-change: transform;
}
@media (prefers-reduced-motion: reduce) {
  .cosmic .star { animation: none !important; }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 15px 26px;
  border-radius: var(--r-sm);
  cursor: pointer;
  border: 0.5px solid transparent;
  transition: transform 280ms var(--ease-spring),
              background 240ms var(--ease-out),
              box-shadow 240ms var(--ease-out),
              border-color 240ms var(--ease-out),
              color 240ms var(--ease-out);
  user-select: none;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }

.btn-gold {
  background: var(--gold);
  color: #0a0b0f;
  font-weight: 500;
  box-shadow: 0 0 0 rgba(217,165,92,0);
}
.btn-gold:hover {
  background: #e7b66e;
  box-shadow: 0 8px 30px rgba(217,165,92,0.28), 0 0 0 1px rgba(217,165,92,0.4);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--line);
}
.btn-ghost:hover {
  border-color: rgba(217,165,92,0.5);
  color: var(--ink);
  background: rgba(217,165,92,0.05);
  transform: translateY(-1px);
}

.btn .arrow { transition: transform 280ms var(--ease-spring); }
.btn:hover .arrow { transform: translateX(3px); }

/* ============================================================
   Reveal-on-scroll
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 900ms var(--ease-out), transform 900ms var(--ease-out);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
}