/* Shelf — shared foundation: tokens, reset, type, grain, buttons.
   Linked by every page (dashboard, login, denied, error). */

:root {
  color-scheme: light dark;

  /* Colour — one definition, light-dark() picks per theme. DESIGN.md values,
     except --muted in light (see note) so small text clears 4.5:1. */
  --bg:           light-dark(#f3f1ec, #0c0c0b);
  --surface:      light-dark(#fbfaf7, #141413);
  --surface-2:    light-dark(#ece9e2, #1c1c1a);
  --ink:          light-dark(#191814, #f1eee7);
  --ink-2:        light-dark(#4a4740, #c9c5bc);
  --muted:        light-dark(#6c675d, #8c887f);
  --faint:        light-dark(#8a857a, #6f6c64);
  --line:         light-dark(rgba(25, 24, 20, .09), rgba(241, 238, 231, .08));
  --line-strong:  light-dark(rgba(25, 24, 20, .16), rgba(241, 238, 231, .16));
  --accent:       light-dark(#e4572e, #ff7a59);
  --accent-text:  light-dark(#b8431f, #ff8f72);
  --live:         light-dark(#1f9d60, #3dd68c);
  --danger:       light-dark(#c8312b, #ff6b6b);
  --on-danger:    light-dark(#fff, #1a0a0a);
  --shadow-c:     light-dark(rgb(52 38 18 / .26), rgb(0 0 0 / .6));

  --serif: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans:  "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --ease: cubic-bezier(.2, .7, .2, 1);
  --gutter: 24px;
  --col: 1040px;
}
:root[data-theme="dark"]  { color-scheme: dark; }
:root[data-theme="light"] { color-scheme: light; }

@media (max-width: 639px) {
  :root { --gutter: 16px; }
}

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

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  color: var(--ink);
  font: 400 15px/1.6 var(--sans);
  letter-spacing: -.005em;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Grain: sits over --bg, under everything with a surface of its own. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n' x='0' y='0'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

h1, h2, h3, p { margin: 0; }
button, input { font: inherit; color: inherit; letter-spacing: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration-color: var(--line-strong); text-underline-offset: .22em; }
a:hover { text-decoration-color: var(--accent); }
img, svg { display: block; max-width: 100%; }
svg { flex: none; }
[hidden] { display: none !important; }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
a:not(.btn):focus-visible { border-radius: 4px; }

::selection { background: color-mix(in oklab, var(--accent) 35%, transparent); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.mono  { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0; word-break: break-all; }
.serif { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }
.num   { font-variant-numeric: tabular-nums; }

/* Wordmark */
.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}
.wordmark b {
  font: italic 400 26px/1 var(--serif);
  letter-spacing: -.012em;
}
.wordmark small {
  font: 400 10.5px/1 var(--mono);
  letter-spacing: .06em;
  color: var(--muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color .18s var(--ease), border-color .18s var(--ease),
              color .18s var(--ease), transform .18s var(--ease), box-shadow .18s var(--ease);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:active:not(:disabled):not([aria-disabled="true"]) { transform: translateY(1px) scale(.985); }
.btn:disabled, .btn[aria-disabled="true"] { cursor: not-allowed; opacity: .5; }
.btn svg { width: 16px; height: 16px; }

.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover:not(:disabled):not([aria-disabled="true"]) {
  background: color-mix(in oklab, var(--ink) 88%, var(--accent));
}

/* A disabled solid button goes quiet instead of turning a muddy grey. */
.btn-primary:disabled, .btn-danger:disabled {
  opacity: 1;
  background: var(--surface-2);
  color: var(--muted);
  border-color: var(--line);
}

.btn-secondary { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-secondary:hover:not(:disabled):not([aria-disabled="true"]) {
  background: var(--surface-2);
  border-color: color-mix(in oklab, var(--ink) 30%, transparent);
}

.btn-quiet { background: transparent; color: var(--ink-2); padding-inline: 12px; }
.btn-quiet:hover:not(:disabled) { color: var(--ink); background: var(--surface-2); }

.btn-danger { background: var(--danger); color: var(--on-danger); }
.btn-danger:hover:not(:disabled) { background: color-mix(in oklab, var(--danger) 88%, var(--ink)); }

.btn-lg { height: 48px; padding: 0 22px; border-radius: 12px; font-size: 15px; }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 36px; height: 36px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--ink-2);
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }
.icon-btn svg { width: 18px; height: 18px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}