/*
 * Xintario design system
 * Shared tokens, base rules, layout primitives, forms, and components.
 * Page-specific composition belongs in pages.css and admin.css.
 */

/* ── Animatable custom properties (CSS @property) ── */

@property --gradient-honey {
  syntax: "<color>";
  inherits: false;
  initial-value: oklch(0.92 0.055 86 / 0.10);
}

@property --gradient-mist {
  syntax: "<color>";
  inherits: false;
  initial-value: oklch(0.86 0.035 218 / 0.12);
}

@property --gradient-sage {
  syntax: "<color>";
  inherits: false;
  initial-value: oklch(0.9 0.05 120 / 0.08);
}

:root {
  --color-bg: oklch(0.97 0.012 86);
  --color-surface: oklch(0.99 0.008 82);
  --color-surface-raised: oklch(0.94 0.018 86);
  --color-surface-deep: oklch(0.89 0.022 84);
  --color-border: oklch(0.8 0.028 110);
  --color-text: oklch(0.16 0.018 92);
  --color-text-muted: oklch(0.42 0.03 105);
  --color-accent: oklch(0.36 0.07 172);
  --color-accent-hover: oklch(0.3 0.065 174);
  --color-accent-light: oklch(0.87 0.045 155);
  --color-secondary: oklch(0.49 0.07 128);
  --color-secondary-light: oklch(0.9 0.05 120);
  --color-honey: oklch(0.78 0.12 82);
  --color-honey-light: oklch(0.92 0.055 86);
  --color-mist: oklch(0.86 0.035 218);
  --color-mist-strong: oklch(0.48 0.055 215);
  --color-danger: oklch(0.5 0.18 25);
  --color-danger-light: oklch(0.98 0.01 20);
  --color-warning: oklch(0.65 0.14 75);
  --color-focus-ring: oklch(0.55 0.15 240);
  --color-inverse: oklch(0.19 0.025 160);
  --color-inverse-text: oklch(0.93 0.015 84);

  --font-body: "Atkinson Hyperlegible Next", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Literata", Georgia, "Times New Roman", serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 5rem;
  --space-10: 6rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-round: 9999px;

  --measure: 68ch;
  --shell-sm: 40rem;
  --shell-md: 60rem;
  --shell-lg: 75rem;
  --touch-target: 2.75rem;

  --z-base: 1;
  --z-sticky: 100;
  --z-overlay: 200;
  --z-modal: 300;
  --z-toast: 400;
  --z-tooltip: 500;
}

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

[hidden] {
  display: none !important;
}

html {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
}

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

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

a {
  color: var(--color-accent);
}

a:hover {
  color: var(--color-accent-hover);
}

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

.app-shell {
  margin-inline: auto;
  max-width: var(--shell-md);
  width: min(100%, var(--shell-md));
}

.app-header {
  align-items: start;
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1fr) auto;
  margin-bottom: var(--space-6);
}

.app-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.1;
  margin: 0;
}

.stack {
  display: grid;
  gap: var(--space-4);
}

.stack--tight {
  gap: var(--space-2);
}

.two-columns {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.row-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: flex-start;
}

.cluster {
  align-items: center;
  display: grid;
  gap: var(--space-2);
  grid-auto-flow: column;
  justify-content: start;
}

.cluster--center {
  justify-content: center;
}

.surface,
.admin-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.surface h2,
.admin-card h2 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin: 0 0 var(--space-4);
}

.eyebrow {
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin: 0;
  text-transform: uppercase;
}

.btn {
  align-items: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-round);
  color: var(--color-text);
  cursor: pointer;
  display: inline-grid;
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  justify-content: center;
  letter-spacing: 0.08em;
  line-height: 1;
  min-height: var(--touch-target);
  padding: var(--space-3) var(--space-6);
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 150ms ease-out, border-color 150ms ease-out, color 150ms ease-out, transform 150ms ease-out;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px) scale(0.97);
  transition-duration: 50ms;
}

.btn:disabled,
.btn[disabled] {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-inverse-text);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-inverse-text);
}

.btn--secondary {
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn--secondary:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.btn--danger {
  color: var(--color-danger);
}

.btn--danger:hover {
  background: var(--color-danger-light);
  border-color: var(--color-danger);
}

.btn--sm {
  min-height: 2.25rem;
  padding: var(--space-2) var(--space-4);
}

.btn--icon {
  border-radius: var(--radius-round);
  font-size: 0.95rem;
  height: 1.9rem;
  min-height: 1.9rem;
  min-width: 1.9rem;
  padding: 0;
  width: 1.9rem;
}

.btn--large {
  min-width: 10rem;
}

.btn--full {
  width: 100%;
}

.stack label {
  color: var(--color-text-muted);
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.stack input:not([type="checkbox"]):not([type="submit"]):not([type="button"]):not([type="radio"]),
.stack textarea,
.stack select,
.field {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  line-height: 1.35;
  min-height: var(--touch-target);
  padding: 0.75rem 1rem;
  width: 100%;
  transition: border-color 150ms ease-out, box-shadow 150ms ease-out, background-color 150ms ease-out;
}

.stack select,
select.field {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--color-text-muted) 50%),
    linear-gradient(135deg, var(--color-text-muted) 50%, transparent 50%);
  background-position:
    calc(100% - 1.15rem) 50%,
    calc(100% - 0.8rem) 50%;
  background-repeat: no-repeat;
  background-size: 0.35rem 0.35rem;
  padding-right: 2.75rem;
}

.stack textarea {
  min-height: 5.5rem;
}

.stack input:focus,
.stack textarea:focus,
.stack select:focus,
.field:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
  outline: none;
}

.stack input:not([type="checkbox"]):not([type="submit"]):not([type="button"]):not([type="radio"]):user-invalid,
.stack textarea:user-invalid,
.stack select:user-invalid,
.field:user-invalid {
  background-color: var(--color-danger-light);
  border-color: var(--color-danger);
}

.field--invalid {
  background-color: var(--color-danger-light) !important;
  border-color: var(--color-danger) !important;
}

.form-section {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-5);
  padding-top: var(--space-5);
}

.form-section:first-of-type {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.form-section__title {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
}

.form-actions {
  align-items: center;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-6);
  padding-top: var(--space-6);
}

.form-errors,
.auth-flash {
  border-radius: var(--radius-md);
  color: var(--color-text);
  padding: var(--space-4);
}

.form-errors {
  background: var(--color-honey-light);
  border: 1px solid var(--color-honey);
  margin-bottom: var(--space-5);
}

.form-errors p {
  margin: 0 0 var(--space-2);
}

.form-errors ul {
  margin: 0;
  padding-left: var(--space-5);
}

.checkbox-line {
  align-items: start;
  cursor: pointer;
  display: grid !important;
  font-size: 0.875rem;
  font-weight: 500;
  gap: var(--space-3);
  grid-template-columns: auto minmax(0, 1fr);
}

.checkbox-line input[type="checkbox"] {
  height: 1.15rem;
  margin-top: 0.15rem;
  width: 1.15rem;
}

.resource-list {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.resource-row {
  padding: var(--space-4) var(--space-5);
  transition: background 0.15s ease;
}

.resource-row:not(.item-card):not(.checkbox-line) {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.resource-row__info {
  flex: 1;
  min-width: 0;
}

.resource-row:hover {
  background: var(--color-surface-raised);
}

.resource-row + .resource-row {
  border-top: 1px solid var(--color-border);
}

.resource-list__empty {
  color: var(--color-text-muted);
  font-style: italic;
  padding: var(--space-6);
  text-align: center;
}

.badge {
  border: 0;
  border-radius: var(--radius-round);
  cursor: pointer;
  font: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.025em;
  padding: 0.15rem 0.6rem;
  text-transform: uppercase;
}

.badge--success {
  background: var(--color-secondary-light);
  color: var(--color-secondary);
}

.badge--neutral {
  background: var(--color-surface-deep);
  color: var(--color-text-muted);
}

.badge--interactive {
  transition: opacity 150ms ease-out, transform 150ms ease-out;
}

.badge--interactive:hover {
  opacity: 0.7;
  transform: translateY(-1px);
}

.badge--interactive:active {
  transform: translateY(1px) scale(0.95);
  transition-duration: 50ms;
}

/* ── Language Toggle ── */

.lang-toggle {
  display: flex;
  gap: var(--space-1);
}

.lang-toggle__link {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-round);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  padding: var(--space-2) var(--space-3);
  text-decoration: none;
  transition: background-color 150ms ease-out, border-color 150ms ease-out, color 150ms ease-out;
}

.lang-toggle__link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.lang-toggle__link--active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-inverse-text);
}

.lang-toggle__link--active:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-inverse-text);
}

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

@media (max-width: 720px) {
  .app-shell {
    width: 100%;
  }

  .app-header,
  .two-columns {
    grid-template-columns: 1fr;
  }

  .app-header > .btn,
  .form-actions .btn,
  .btn--large {
    width: 100%;
  }

  .surface,
  .admin-card {
    padding: var(--space-5);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }

  .btn:hover {
    transform: none;
  }

  .welcome-burst {
    display: none;
  }

  .auth-card,
  .auth-card > * {
    transition: none !important;
  }
}