/* Vellum — design tokens.
   The artwork is the colour in this app, so the chrome stays warm-neutral and
   one muted gold carries emphasis. Type, spacing and radii come from a fixed
   scale rather than ad-hoc values, which is what keeps it from feeling rushed. */

:root {
  /* ── Surfaces ─────────────────────────────────────────────────────── */
  --bg: #0c0c0e;
  --surface: #141416;
  --surface-2: #1b1b1e;
  --surface-3: #232327;
  --border: #26262a;
  --border-strong: #343439;

  /* ── Ink ──────────────────────────────────────────────────────────── */
  --text: #f4f3f5;
  --muted: #a3a1a9;
  --faint: #6d6b75;

  /* ── Emphasis ─────────────────────────────────────────────────────── */
  --accent: #d9a441;
  --accent-hover: #e6b556;
  --accent-soft: color-mix(in srgb, var(--accent) 18%, transparent);
  --accent-text: #1a1204;
  --danger: #e0625c;
  --success: #4fbf83;

  /* ── Type scale (rem, relative to the 15px root) ──────────────────── */
  --fs-xs: 0.8rem; /* 12 */
  --fs-sm: 0.867rem; /* 13 */
  --fs-md: 0.933rem; /* 14 */
  --fs-base: 1rem; /* 15 */
  --fs-lg: 1.133rem; /* 17 */
  --fs-xl: 1.333rem; /* 20 */
  --fs-2xl: 1.733rem; /* 26 */
  --fs-3xl: 2.4rem; /* 36 */

  --lh-tight: 1.15;
  --lh-snug: 1.35;
  --lh-body: 1.55;

  /* ── Space ────────────────────────────────────────────────────────── */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  /* ── Shape ────────────────────────────────────────────────────────── */
  --radius-sm: 5px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-cover: 8px;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI Variable Text', 'Segoe UI',
    Roboto, Helvetica, Arial, 'Noto Sans', sans-serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --nav-width: 236px;
  --shadow-cover: 0 1px 2px rgba(0, 0, 0, 0.45), 0 6px 20px rgba(0, 0, 0, 0.35);
  --shadow-lift: 0 10px 28px rgba(0, 0, 0, 0.5);

  /* User-controlled sizing. --ui-scale drives every rem in the app, so the
     text-size setting scales headings, labels and body together. --card-scale
     drives cover widths in shelves and grids, so card size is independent of
     text size. Both are set from the Appearance panel and persisted locally. */
  --ui-scale: 1;
  --card-scale: 1;
  --card-w: calc(160px * var(--card-scale));
  --grid-min: calc(158px * var(--card-scale));

  /* Motion. Short, eased, and purposeful: things respond to you, nothing
     bounces. Every transition uses one of these so the app moves as one. */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast: 120ms;
  --t-base: 200ms;
  --t-slow: 320ms;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #faf9f7;
    --surface: #ffffff;
    --surface-2: #f3f2ef;
    --surface-3: #e9e7e3;
    --border: #e6e4df;
    --border-strong: #d3d0ca;

    --text: #17161a;
    --muted: #5f5d66;
    --faint: #8a8791;

    --accent: #a8761c;
    --accent-hover: #8f6414;
    --accent-soft: color-mix(in srgb, var(--accent) 14%, transparent);
    --accent-text: #ffffff;
    --danger: #c0392b;
    --success: #1f8a4c;

    --shadow-cover: 0 1px 2px rgba(20, 20, 30, 0.08), 0 6px 18px rgba(20, 20, 30, 0.1);
    --shadow-lift: 0 10px 26px rgba(20, 20, 30, 0.16);
  }
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  height: 100%;
  margin: 0;
}

html {
  /* The single root size every rem is relative to. 15px is a deliberate ~7%
     increase over the previous 14px baseline; the Appearance panel multiplies
     it via --ui-scale. */
  font-size: calc(15px * var(--ui-scale));
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 620;
  letter-spacing: -0.02em;
  line-height: var(--lh-tight);
}
h1 {
  font-size: var(--fs-2xl);
}
h2 {
  font-size: var(--fs-lg);
  letter-spacing: -0.012em;
}
h3 {
  font-size: var(--fs-base);
  font-weight: 600;
  letter-spacing: -0.006em;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

/* Keyboard focus is visible everywhere; pointer clicks stay clean. */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* Anyone who has asked the system for less motion gets none of it. */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Controls ───────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--text);
  font-size: var(--fs-md);
  font-weight: 500;
  cursor: pointer;
  transition:
    background var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease);
  white-space: nowrap;
}
.btn:hover:not(:disabled) {
  background: var(--surface-3);
  border-color: var(--faint);
}
.btn:active:not(:disabled) {
  transform: translateY(1px);
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-ghost {
  border-color: transparent;
  background: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: var(--surface-2);
  border-color: transparent;
}
.btn-lg {
  padding: 10px 20px;
  font-size: var(--fs-base);
  border-radius: var(--radius-lg);
}

.input {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: var(--fs-md);
  transition:
    border-color var(--t-fast) var(--ease),
    box-shadow var(--t-fast) var(--ease);
}
.input::placeholder {
  color: var(--faint);
}
.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--muted);
}

/* ── Surfaces ───────────────────────────────────────────────────────── */

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.badge {
  display: inline-block;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  font-size: var(--fs-xs);
  color: var(--muted);
}

.chip {
  padding: 6px 13px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: var(--fs-md);
  transition:
    background var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}
.chip:hover {
  color: var(--text);
  border-color: var(--faint);
}
.chip.active {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
  font-weight: 500;
}

.alert {
  padding: 10px 14px;
  border: 1px solid color-mix(in srgb, var(--danger) 45%, var(--border));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  font-size: var(--fs-md);
}
.ok {
  padding: 10px 14px;
  border: 1px solid color-mix(in srgb, var(--success) 40%, var(--border));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--success) 9%, transparent);
  font-size: var(--fs-md);
}

.muted {
  color: var(--muted);
}
.faint {
  color: var(--faint);
}
.mono {
  font-family: var(--mono);
  font-size: var(--fs-sm);
}

/* ── Cover ──────────────────────────────────────────────────────────── */

.cover {
  position: relative;
  aspect-ratio: 2 / 3;
  border-radius: var(--radius-cover);
  background: var(--surface-2);
  overflow: hidden;
  box-shadow: var(--shadow-cover);
}
.cover.wide {
  aspect-ratio: 1 / 1;
}
.cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.cover .placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--faint);
  background: linear-gradient(150deg, var(--surface-2), var(--surface-3));
}
.cover img + .placeholder {
  display: none;
}

/* ── Empty ──────────────────────────────────────────────────────────── */

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-7) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  color: var(--muted);
  background: var(--surface);
}
.empty h3 {
  color: var(--text);
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.skeleton {
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 37%, var(--surface-2) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-cover);
}
@keyframes shimmer {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: -100% 0;
  }
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 999px;
  border: 3px solid var(--bg);
}