/**
 * OSTikTok shared design system
 * Single source of truth for tokens + form/button primitives.
 * Loaded before admin.css / portal.css on all three portals.
 */

:root {
  /* Brand — soft aqua accent (dark-first, future-unified) */
  --accent: #3ddcb0;
  --accent-strong: #1f9f80;
  --accent-soft: rgba(61, 220, 176, 0.14);
  --accent-soft-border: rgba(61, 220, 176, 0.32);
  --on-accent: #06231c;
  --success: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;

  /* Surfaces — OLED-friendly dark default */
  --bg: #070b12;
  --bg-elevated: #0a1019;
  --surface: #0f1623;
  --surface-2: #162033;
  --surface-3: #1c2940;
  --panel: var(--surface);
  --card-bg: var(--surface);
  --ink: #e8eef7;
  --text: #e8eef7;
  --muted: #8b9bb0;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --header-bg: rgba(7, 11, 18, 0.86);
  --input-bg: #0a121d;
  --toggle-bg: var(--surface-2);
  --code-bg: rgba(139, 155, 176, 0.12);
  --pill-bg: rgba(61, 220, 176, 0.14);
  --pill-text: #9af0d4;
  --alert-bg: rgba(248, 113, 113, 0.12);
  --alert-border: rgba(248, 113, 113, 0.35);
  --alert-text: #fecaca;
  --focus: 0 0 0 3px rgba(61, 220, 176, 0.32);

  /* Spacing / radius / motion */
  --ui-space-1: 4px;
  --ui-space-2: 8px;
  --ui-space-3: 12px;
  --ui-space-4: 16px;
  --ui-space-5: 20px;
  --ui-space-6: 24px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --ui-radius-sm: 10px;
  --ui-radius-md: 14px;
  --ui-radius-lg: 18px;
  --ui-radius-pill: 999px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-xs: 10px;
  --radius: 14px;
  --ui-touch: 44px;
  --ui-btn-pad-y: 10px;
  --ui-btn-pad-x: 18px;
  --ui-transition: 180ms ease;
  --ui-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --ui-focus-ring: var(--focus);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.4);
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.28);
  --font-body: "Cairo", "Plus Jakarta Sans", system-ui, sans-serif;
  --font-base: "Plus Jakarta Sans", "Cairo", system-ui, sans-serif;
}

html[lang="en"],
html[lang^="en"] {
  --font-body: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-base: "Plus Jakarta Sans", system-ui, sans-serif;
}

:dir(rtl) {
  --font-base: "Cairo", "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body: "Cairo", "Plus Jakarta Sans", system-ui, sans-serif;
}

/* Force European digits (123), never Eastern Arabic-Indic (١٢٣) */
html,
body {
  font-variant-numeric: lining-nums;
}

html[lang^="ar"] {
  font-feature-settings: "locl" 0;
}

.mono-ltr,
code,
.license-code,
.stat-card__value,
.stat__value,
.input[type="number"],
input[type="number"] {
  font-variant-numeric: lining-nums tabular-nums;
}

/* ---------- Brand / logo ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text);
  min-height: var(--ui-touch);
  min-width: 0;
}

.brand:hover {
  color: var(--text);
}

.brand:focus-visible {
  outline: none;
  box-shadow: var(--ui-focus-ring);
  border-radius: var(--ui-radius-sm);
}

.brand__logo {
  display: block;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  background-color: currentColor;
  -webkit-mask: url("/static/logo-os.png") center / contain no-repeat;
  mask: url("/static/logo-os.png") center / contain no-repeat;
}

.brand__meta {
  display: grid;
  gap: 2px;
  min-width: 0;
  line-height: 1.15;
}

.brand__name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.brand__context {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand--header .brand__logo {
  width: 42px;
  height: 42px;
}

.brand--sidebar .brand__logo {
  width: 44px;
  height: 44px;
}

.brand--auth {
  flex-direction: column;
  gap: var(--space-4);
  text-align: center;
  margin-inline: auto;
  margin-bottom: var(--space-5);
}

.brand--auth .brand__logo {
  width: 72px;
  height: 72px;
}

.hero .brand--auth {
  margin-bottom: var(--space-4);
}

.hero .brand--auth .brand__logo {
  width: 88px;
  height: 88px;
}

.brand--auth .brand__meta {
  justify-items: center;
}

.brand--auth .brand__name {
  font-size: 1.35rem;
}

.brand--auth .brand__context {
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ui-space-2);
  box-sizing: border-box;
  min-height: var(--ui-touch);
  min-width: var(--ui-touch);
  width: auto;
  max-width: 100%;
  padding: var(--ui-btn-pad-y) var(--ui-btn-pad-x);
  border: none;
  border-radius: var(--ui-radius-pill);
  background: var(--accent);
  color: var(--on-accent, #06231c);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  box-shadow: 0 8px 20px rgba(61, 220, 176, 0.16);
  transition: transform var(--ui-transition), box-shadow var(--ui-transition),
    background-color var(--ui-transition), border-color var(--ui-transition),
    opacity var(--ui-transition);
}

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

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--ui-focus-ring);
}

.btn--primary {
  background: var(--accent);
  color: var(--on-accent, #06231c);
}

.btn--ghost {
  background: transparent;
  color: var(--text, var(--ink));
  border: 1px solid var(--border);
  box-shadow: none;
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: none;
}

.btn--outline:hover {
  background: var(--accent);
  color: #fff;
}

.btn--warn {
  background: var(--warn);
  color: #1c1917;
}

.btn--danger {
  background: var(--danger);
  color: #450a0a;
}

.btn--secondary {
  background: var(--surface-2, #1f2937);
  color: var(--text, #fff);
  border: 1px solid var(--border);
  box-shadow: none;
}

.btn--sm {
  min-height: 36px;
  min-width: 36px;
  padding: 6px 12px;
  font-size: 12px;
}

.btn--lg {
  min-height: 48px;
  padding: 12px 22px;
  font-size: 16px;
}

.btn[disabled],
button[disabled].btn {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  pointer-events: none;
}

/* ---------- Forms ---------- */
.form {
  display: grid;
  gap: var(--ui-space-4);
  min-width: 0;
}

.form--grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  align-items: end;
}

.form--inline {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
}

.form__actions,
.page-actions.form__actions,
.banned-form__actions,
.whitelist-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ui-space-3);
  align-items: center;
  grid-column: 1 / -1;
  justify-self: stretch;
  width: 100%;
  padding-top: var(--ui-space-1);
}

.form--grid > .btn,
.form > .btn {
  justify-self: start;
  width: auto;
  max-width: max-content;
  align-self: end;
}

.form__actions > .btn,
.form__actions > a.btn {
  flex: 0 0 auto;
  width: auto;
}

.field {
  display: grid;
  gap: 6px;
  min-width: 0;
  align-content: start;
}

.field--full,
.field--wide {
  grid-column: 1 / -1;
}

.field > span:first-child,
.field > label:first-child {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.input,
.field input,
.field select,
.field textarea,
.form input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]):not([type="file"]),
.form select,
.form textarea {
  box-sizing: border-box;
  width: 100%;
  min-height: var(--ui-touch);
  min-width: 0;
  padding: 10px 14px;
  border-radius: var(--ui-radius-sm);
  font-family: inherit;
  font-size: 14px;
}

.field input[type="file"],
.form input[type="file"] {
  min-height: var(--ui-touch);
  padding: 8px 10px;
  font-size: 13px;
}

.field textarea,
.form textarea {
  min-height: 96px;
  resize: vertical;
}

/* ---------- Section chrome ---------- */
.section-title {
  margin: 0 0 var(--ui-space-2);
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  font-weight: 700;
  line-height: 1.3;
}

.section-title--sm {
  font-size: 1.05rem;
}

h3.section-title {
  font-size: 1.05rem;
  margin-top: var(--ui-space-5);
}

.section-subtitle {
  margin: 0 0 var(--ui-space-4);
  font-size: 13px;
  line-height: 1.5;
  opacity: 0.85;
}

.panel + .panel,
.card + .panel,
.panel + .card {
  margin-top: var(--ui-space-4);
}

.table-wrap,
.table-wrapper {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ui-space-2);
  align-items: center;
}

/* ---------- Accessibility ---------- */
.skip-link {
  position: absolute;
  inset-inline-start: 12px;
  top: 12px;
  z-index: 1000;
  padding: 10px 16px;
  border-radius: var(--ui-radius-sm);
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform var(--ui-transition);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: none;
  box-shadow: var(--ui-focus-ring);
}

/* ---------- Filters ---------- */
.filters__form {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ui-space-3);
  align-items: end;
}

.filters__form > input,
.filters__form > select,
.filters__form .field {
  flex: 1 1 160px;
  min-width: 0;
}

.filters__form > .btn,
.filters__form .page-actions,
.filters__form .btn-group {
  flex: 0 0 auto;
}

.filters__row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr));
  gap: var(--ui-space-3);
  width: 100%;
}

/* ---------- License import / pair helpers ---------- */
.license-import {
  display: grid;
  gap: var(--ui-space-3);
  margin-bottom: var(--ui-space-4);
}

.license-import__form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ui-space-3);
  justify-content: flex-start;
}

.license-import__form .input {
  flex: 1 1 220px;
  max-width: 420px;
  min-width: 0;
}

.license-import__form .btn {
  flex: 0 0 auto;
}

.license-actions--start {
  justify-content: flex-start;
  margin-bottom: var(--ui-space-3);
}

.muted--tight {
  margin-top: 0;
}

.welcome-actions--stack {
  flex-direction: column;
  align-items: stretch;
  gap: var(--ui-space-3);
}

.welcome-actions--stack .btn,
.welcome-actions--stack form,
.welcome-actions--stack form .btn {
  width: 100%;
}

.pair-status__hint {
  margin-top: var(--ui-space-3);
}

.empty-state,
.empty-block {
  text-align: center;
  padding: clamp(28px, 5vw, 48px) var(--ui-space-5);
  color: var(--muted);
}

.empty-block {
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-softer, transparent);
}

.empty-state__title {
  margin: 0 0 var(--ui-space-2);
  font-size: 1.15rem;
  font-weight: 700;
}

.empty-state__body {
  margin: 0 0 var(--ui-space-5);
  font-size: 14px;
  line-height: 1.5;
}

.empty-state__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ui-space-3);
  justify-content: center;
}

/* ---------- Content safety ---------- */
.content,
.portal-main,
.panel,
.card,
.main {
  min-width: 0;
}

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

a,
button,
.btn,
.nav__link,
.portal-nav__link {
  touch-action: manipulation;
}

body {
  overscroll-behavior-y: contain;
}

@media (max-width: 720px) {
  .form--grid {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .form--inline {
    grid-template-columns: 1fr;
  }

  .form--grid > .btn,
  .form > .btn,
  .form__actions > .btn.btn--primary,
  .form__actions > button.btn--primary {
    width: 100%;
    max-width: none;
    justify-self: stretch;
  }

  .form__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .form__actions > .btn,
  .form__actions > a.btn {
    width: 100%;
    justify-content: center;
  }

  .form .input-toggle,
  .form__actions > .btn--ghost,
  .form__actions > .btn--sm {
    width: auto;
    max-width: max-content;
    justify-self: start;
  }

  .btn--sm {
    min-height: var(--ui-touch);
    padding: 10px 14px;
    font-size: 13px;
  }

  .table-actions {
    width: 100%;
  }

  .table-actions .btn,
  .table-actions form,
  .table-actions form .btn {
    width: 100%;
  }

  .input,
  .field input,
  .field select,
  .field textarea,
  .form input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]),
  .form select,
  .form textarea {
    font-size: 16px;
  }

  .filters__form {
    flex-direction: column;
    align-items: stretch;
  }

  .filters__form > .btn,
  .filters__form .page-actions,
  .filters__form .btn-group,
  .filters__form .btn-group .btn {
    width: 100%;
  }

  .license-import__form {
    flex-direction: column;
    align-items: stretch;
  }

  .license-import__form .input,
  .license-import__form .btn {
    max-width: none;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }

  .btn:hover,
  .btn:active {
    transform: none;
  }
}