/*
 * Site theme, from the devshop UI baseline (runtime/guidelines/ui.md); this project owns it: change the
 * colours, add components. Token names are shadcn/ui's, so a React app adopting shadcn/ui keeps
 * them. Light is :root; dark is :root[data-theme="dark"] (the toggle) and, with the same values,
 * the system-dark rule below (no toggle choice). Only these three rules declare custom properties;
 * tokens-check.mjs holds that, and that every var() used here and in pages is defined.
 */

:root {
  color-scheme: light;

  --background: oklch(0.975 0.008 85);
  --foreground: oklch(0.24 0.02 265);
  --card: oklch(0.995 0.004 85);
  --card-foreground: oklch(0.24 0.02 265);
  --popover: oklch(0.995 0.004 85);
  --popover-foreground: oklch(0.24 0.02 265);
  --primary: oklch(0.42 0.12 262);
  --primary-foreground: oklch(0.985 0.005 85);
  --secondary: oklch(0.94 0.01 85);
  --secondary-foreground: oklch(0.28 0.03 265);
  --muted: oklch(0.94 0.01 85);
  --muted-foreground: oklch(0.47 0.02 265);
  --accent: oklch(0.93 0.02 85);
  --accent-foreground: oklch(0.3 0.06 265);
  --destructive: oklch(0.52 0.2 27);
  --destructive-foreground: oklch(0.985 0.005 250);
  --border: oklch(0.89 0.012 85);
  --input: oklch(0.82 0.014 85);
  --ring: oklch(0.55 0.13 262);
  --shadow:
    0 1px 2px oklch(0.2 0.02 260 / 6%), 0 1px 3px oklch(0.2 0.02 260 / 8%);

  --radius: 0.75rem;
  --font-sans:
    system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
    sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --tap: 44px; /* minimum control size (L-72, WCAG 2.5.5) */
  --measure: 68ch; /* longest comfortable line of text */
  --page-max: 72rem;

  --tile-sun: oklch(0.92 0.07 85);
  --tile-meadow: oklch(0.9 0.05 140);
  --tile-rose: oklch(0.9 0.045 15);
  --tile-sea: oklch(0.87 0.055 230);
  --tile-mint: oklch(0.91 0.04 165);
  --tile-night: oklch(0.27 0.04 272);
}

:root[data-theme='dark'] {
  color-scheme: dark;

  --background: oklch(0.16 0.015 265);
  --foreground: oklch(0.95 0.006 85);
  --card: oklch(0.2 0.018 265);
  --card-foreground: oklch(0.95 0.006 85);
  --popover: oklch(0.2 0.018 265);
  --popover-foreground: oklch(0.95 0.006 85);
  --primary: oklch(0.78 0.1 262);
  --primary-foreground: oklch(0.18 0.03 265);
  --secondary: oklch(0.25 0.02 265);
  --secondary-foreground: oklch(0.95 0.006 85);
  --muted: oklch(0.25 0.02 265);
  --muted-foreground: oklch(0.74 0.015 85);
  --accent: oklch(0.27 0.03 265);
  --accent-foreground: oklch(0.92 0.02 85);
  --destructive: oklch(0.66 0.19 25);
  --destructive-foreground: oklch(0.17 0.02 25);
  --border: oklch(0.28 0.02 265);
  --input: oklch(0.38 0.02 265);
  --ring: oklch(0.7 0.11 262);
  --shadow: 0 1px 2px oklch(0 0 0 / 30%);

  --tile-sun: oklch(0.34 0.045 80);
  --tile-meadow: oklch(0.33 0.04 145);
  --tile-rose: oklch(0.33 0.04 15);
  --tile-sea: oklch(0.33 0.05 235);
  --tile-mint: oklch(0.33 0.035 170);
  --tile-night: oklch(0.12 0.03 272);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;

    --background: oklch(0.16 0.015 265);
    --foreground: oklch(0.95 0.006 85);
    --card: oklch(0.2 0.018 265);
    --card-foreground: oklch(0.95 0.006 85);
    --popover: oklch(0.2 0.018 265);
    --popover-foreground: oklch(0.95 0.006 85);
    --primary: oklch(0.78 0.1 262);
    --primary-foreground: oklch(0.18 0.03 265);
    --secondary: oklch(0.25 0.02 265);
    --secondary-foreground: oklch(0.95 0.006 85);
    --muted: oklch(0.25 0.02 265);
    --muted-foreground: oklch(0.74 0.015 85);
    --accent: oklch(0.27 0.03 265);
    --accent-foreground: oklch(0.92 0.02 85);
    --destructive: oklch(0.66 0.19 25);
    --destructive-foreground: oklch(0.17 0.02 25);
    --border: oklch(0.28 0.02 265);
    --input: oklch(0.38 0.02 265);
    --ring: oklch(0.7 0.11 262);
    --shadow: 0 1px 2px oklch(0 0 0 / 30%);

    --tile-sun: oklch(0.34 0.045 80);
    --tile-meadow: oklch(0.33 0.04 145);
    --tile-rose: oklch(0.33 0.04 15);
    --tile-sea: oklch(0.33 0.05 235);
    --tile-mint: oklch(0.33 0.035 170);
    --tile-night: oklch(0.12 0.03 272);
  }
}

/* ---- Base ---- */

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

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

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3 {
  margin: 0 0 var(--space-2);
  line-height: 1.2;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.5rem, 1.2rem + 1.5vw, 2.25rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.125rem;
}

p {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
}

a {
  color: var(--primary);
  text-underline-offset: 0.2em;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.muted {
  color: var(--muted-foreground);
}

/* ---- Layout: one column on a phone, wider from 768 px, a 3-column grid from 1280 px ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--background);
  border-bottom: 1px solid var(--border);
}

.site-header > .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--page-max);
  margin-inline: auto;
  padding: var(--space-2) var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  font-weight: 650;
  font-size: 1.0625rem;
  color: var(--foreground);
  text-decoration: none;
}

.page {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding: var(--space-6) var(--space-4) var(--space-8);
}

.stack > * + * {
  margin-top: var(--space-6);
}

.site-footer {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: var(--space-6) var(--space-4);
  border-top: 1px solid var(--border);
  color: var(--muted-foreground);
  font-size: 0.875rem;
}

.grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 768px) {
  .site-header > .inner,
  .page,
  .site-footer {
    padding-inline: var(--space-8);
  }

  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---- Components ---- */

.card {
  background: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow);
}

.card > :last-child {
  margin-bottom: 0;
}

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.list > li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: var(--tap);
  padding: var(--space-2) var(--space-4);
}

.list > li + li {
  border-top: 1px solid var(--border);
}

.badge {
  display: inline-block;
  padding: 0.125rem var(--space-2);
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-foreground);
  font-size: 0.8125rem;
  font-weight: 550;
  white-space: nowrap;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---- Controls: the L-72 contract, set once here ---- */

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

/* Tappable at once, no double-tap zoom delay. */
a,
button,
input,
select,
textarea,
summary,
label,
[role='button'] {
  touch-action: manipulation;
}

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--tap);
  min-width: var(--tap);
  padding: 0 var(--space-4);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 0.25rem);
  background: var(--secondary);
  color: var(--secondary-foreground);
  font-weight: 550;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    filter 0.15s,
    transform 0.08s;
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-foreground);
  border-color: transparent;
}

.btn-secondary {
  background: var(--secondary);
  color: var(--secondary-foreground);
}

.btn-destructive {
  background: var(--destructive);
  color: var(--destructive-foreground);
  border-color: transparent;
}

.btn-outline {
  background: transparent;
  color: var(--foreground);
  border-color: var(--input);
}

@media (hover: hover) {
  :where(button, .btn, [role='button']):hover:not(
      :disabled,
      [aria-disabled='true']
    ) {
    filter: brightness(0.95);
  }
}

/* The pressed state: one low-specificity rule every control inherits. */
:where(button, .btn, [role='button'], summary):active:not(
    :disabled,
    [aria-disabled='true']
  ) {
  transform: scale(0.97);
  filter: brightness(0.9);
}

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

:where(button, .btn):disabled,
:where(button, .btn)[aria-disabled='true'] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Busy: disabled at once; the spinner shows only after a delay, so fast actions don't flicker. */
[aria-busy='true'] {
  cursor: progress;
}

:where(button, .btn)[aria-busy='true'] {
  opacity: 0.85;
}

:where(button, .btn)[aria-busy='true']::before {
  content: '';
  width: 1em;
  height: 1em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  opacity: 0;
  animation:
    busy-show 0s 250ms forwards,
    busy-spin 0.7s linear infinite;
}

@keyframes busy-show {
  to {
    opacity: 1;
  }
}

@keyframes busy-spin {
  to {
    transform: rotate(1turn);
  }
}

/* Forms */

.field {
  display: grid;
  gap: var(--space-1);
}

.field > label {
  font-weight: 550;
}

input:not([type='checkbox'], [type='radio'], [type='hidden']),
select,
textarea {
  width: 100%;
  min-height: var(--tap);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--input);
  border-radius: calc(var(--radius) - 0.25rem);
  background: var(--background);
  color: var(--foreground);
}

textarea {
  min-height: 6rem;
  resize: vertical;
}

.check {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--tap);
  cursor: pointer;
}

input[type='checkbox'],
input[type='radio'] {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0;
  accent-color: var(--primary);
}

.form {
  display: grid;
  gap: var(--space-4);
  max-width: 40rem;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}