/* ==========================================================================
   base.css — design tokens, reset, typography, cursor, shared primitives
   ========================================================================== */

:root {
  /* Type */
  --font-display: 'Fraunces', 'Noto Serif SC', serif;
  --font-body: 'Noto Serif SC', 'Songti SC', serif;
  --font-mono: 'IBM Plex Mono', 'Menlo', monospace;

  /* Era-independent constants */
  --ivory: #ede3cd;
  --ebony: #0e0b0d;
  --dock-height: 178px;

  /* Era theme defaults — overridden per era in eras.css */
  --bg: #100d12;
  --bg-soft: #17131b;
  --ink: #ece4d2;
  --ink-dim: #a99f8c;
  --accent: #c9a86a;
  --accent-soft: rgba(201, 168, 106, 0.14);
  --line: rgba(236, 228, 210, 0.16);
}

html[lang='en'] {
  --font-body: 'Fraunces', 'Iowan Old Style', 'Baskerville', Georgia, serif;
}

html[lang='en'] body {
  line-height: 1.72;
  letter-spacing: 0.012em;
}

*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.55vw + 0.85rem, 1.14rem);
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--ink);
  background-color: var(--bg);
  transition: background-color 1.4s ease, color 1.4s ease;
  overflow-x: hidden;
}

/* Subtle paper grain over everything, like the surface of a piano roll. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 2px, rgba(255, 255, 255, 0.35) 2px 3px),
    repeating-linear-gradient(90deg, transparent 0 3px, rgba(0, 0, 0, 0.4) 3px 4px);
  mix-blend-mode: overlay;
}

img { max-width: 100%; display: block; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

em { font-style: normal; color: var(--accent); }
strong { font-weight: 600; color: var(--accent); }

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--line); }
a:hover { border-bottom-color: var(--accent); }

button {
  font-family: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.72em;
  letter-spacing: 0.14em;
  font-weight: 400;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Scroll-reveal primitive (activated by js/scroll.js)
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.22, 0.9, 0.3, 1);
  transition-delay: var(--reveal-delay, 0s);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* QA hook (?noanim): skip entrances and smooth scrolling entirely */
.force-visible { scroll-behavior: auto; }
.force-visible .reveal { opacity: 1; transform: none; transition: none; }

/* --------------------------------------------------------------------------
   Custom cursor
   -------------------------------------------------------------------------- */
.cursor {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  pointer-events: none;
}

.cursor-dot {
  position: absolute;
  width: 6px;
  height: 6px;
  margin: -3px;
  border-radius: 50%;
  background: var(--accent);
}

.cursor-ring {
  position: absolute;
  width: 34px;
  height: 34px;
  margin: -17px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0.55;
  transition: opacity 0.25s ease;
  /* translate + scale are driven per-frame by js/cursor.js */
}

.cursor.is-active .cursor-ring { opacity: 0.9; }

/* Hide the custom cursor on touch / coarse pointers */
@media (pointer: coarse) {
  .cursor { display: none; }
}

@media (pointer: fine) {
  body.has-cursor,
  body.has-cursor a,
  body.has-cursor button { cursor: none; }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn-primary {
  position: relative;
  font-family: var(--font-body);
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: 0.35em;
  text-indent: 0.35em;
  color: var(--ebony);
  background: var(--accent);
  padding: 1rem 2.6rem;
  border-radius: 999px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 1.4s ease;
  box-shadow: 0 0 0 0 var(--accent-soft);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px -8px var(--accent-soft), 0 0 0 8px var(--accent-soft);
}

.btn-primary .btn-ring {
  position: absolute;
  inset: -7px;
  border: 1px solid var(--accent);
  border-radius: inherit;
  opacity: 0.45;
  animation: btn-breathe 3.2s ease-in-out infinite;
}

@keyframes btn-breathe {
  0%, 100% { transform: scale(1); opacity: 0.45; }
  50% { transform: scale(1.05); opacity: 0.15; }
}

/* --------------------------------------------------------------------------
   Reduced motion — every module also checks this in JS
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }

  .reveal { opacity: 1; transform: none; }
}