/* =============================================================================
   Digital Art Factory — BASE + COMPONENTS  (assets/css/base.css)
   Load AFTER tokens.css.

   Contains, in order:
     1. Reset + base element defaults
     2. Reduced-motion global guard (second layer; tokens.css is the first)
     3. Layout shell (header / nav / main / footer) + skip link
     4. Accessibility utilities (.visually-hidden, .num, focus, etc.)
     5. Components: hero, cards, steps, contact list, buttons, alerts,
        toasts, language switcher, prose (legal pages), 404 block

   Everything is responsive and RTL-aware via CSS logical properties.
   Components reference ONLY the tokens in tokens.css.
   ============================================================================= */

/* ============================================================================
   1. RESET + BASE ELEMENTS
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

/* The HTML `hidden` attribute must always win. Components below set
   `display:flex`, which otherwise overrides the UA `[hidden]{display:none}`
   rule and leaves JS-toggled elements visible. */
[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-block-start: calc(var(--header-h) + var(--s-4));
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-ui);
  font-size: var(--t-body);
  line-height: var(--lh-body);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--s-3);
  line-height: var(--lh-tight);
  font-weight: var(--fw-semi);
  color: var(--c-text);
  text-wrap: balance;
}
h1 { font-size: var(--t-h1); }
h2 { font-size: var(--t-h2); }
h3 { font-size: var(--t-h3); }
h4 { font-size: var(--t-h4); }

p { margin: 0 0 var(--s-4); }

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

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

ul, ol { margin: 0 0 var(--s-4); padding-inline-start: var(--s-5); }

dl { margin: 0 0 var(--s-4); }
dt { font-weight: var(--fw-semi); }
dd { margin-inline-start: 0; margin-block-end: var(--s-3); color: var(--c-text-2); }

hr {
  border: 0;
  border-block-start: 1px solid var(--c-divider);
  margin-block: var(--s-5);
}

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

/* Global visible focus. Never remove an outline without a replacement. */
:focus-visible {
  outline: 2px solid transparent;
  outline-offset: 2px;
  box-shadow: var(--shadow-focus);
  border-radius: var(--r-xs);
}
/* Suppress the legacy outline only where :focus-visible is honored. */
:focus:not(:focus-visible) { outline: none; }

::selection { background: color-mix(in srgb, var(--c-accent) 30%, transparent); }

/* ============================================================================
   2. REDUCED-MOTION GLOBAL GUARD (WCAG 2.3.3)
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================================
   3. LAYOUT SHELL
   ========================================================================== */
.shell {
  inline-size: 100%;
  max-inline-size: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--s-4);
}
.shell--narrow { max-inline-size: var(--maxw-narrow); }

main.shell {
  flex: 1 0 auto;
  padding-block: var(--s-6) var(--s-8);
}
main:focus { outline: none; } /* programmatic focus target; skip-link gives context */

/* Skip link — first focusable element (WCAG 2.4.1). */
.skip-link {
  position: absolute;
  inset-block-start: var(--s-2);
  inset-inline-start: var(--s-2);
  z-index: var(--z-modal);
  padding: var(--s-2) var(--s-4);
  background: var(--c-accent);
  color: var(--c-accent-ink);
  border-radius: var(--r-sm);
  font-weight: var(--fw-semi);
  transform: translateY(-200%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
  text-decoration: none;
}

/* Header */
.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-header);
  background: var(--c-surface-2);
  border-block-end: 1px solid var(--c-border);
}
.hdr {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  block-size: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--c-text);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-caps);
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: var(--c-text); text-decoration: none; }
.brand__mark { color: var(--c-accent); font-size: 1.25em; line-height: 1; }
.brand__word { font-size: var(--t-h4); }

.nav {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  margin-inline-start: var(--s-3);
}
.nav a {
  display: inline-flex;
  align-items: center;
  min-block-size: var(--tap);
  padding-inline: var(--s-3);
  border-radius: var(--r-sm);
  color: var(--c-text-2);
  font-weight: var(--fw-med);
  text-decoration: none;
  white-space: nowrap;
}
.nav a:hover { color: var(--c-text); background: var(--c-surface-3); text-decoration: none; }
.nav a[aria-current="page"] {
  color: var(--c-accent);
  background: var(--c-accent-soft);
}

.hdr__tools {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: var(--s-2);
}

/* Mobile nav disclosure (under ~720px) */
.nav__toggle { display: none; }
@media (max-width: 720px) {
  .nav__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-inline-size: var(--tap);
    min-block-size: var(--tap);
  }
  .nav {
    position: absolute;
    inset-block-start: var(--header-h);
    inset-inline: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-inline-start: 0;
    padding: var(--s-2);
    background: var(--c-surface-2);
    border-block-end: 1px solid var(--c-border);
    box-shadow: var(--shadow-2);
  }
  .nav[hidden] { display: none; }
  .nav a { min-block-size: var(--tap); }
  .hdr__signin { display: none; } /* the portal CTA stays reachable in the hero */
}

/* Footer */
.site-footer {
  flex: 0 0 auto;
  background: var(--c-surface-2);
  border-block-start: 1px solid var(--c-border);
  margin-block-start: var(--s-8);
}
.ft {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-3) var(--s-5);
  padding-block: var(--s-5);
}
.ft__tagline { margin: 0; color: var(--c-text-2); font-size: var(--t-sm); }
.ft__nav {
  margin-inline-start: auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-4);
}
.ft__nav a {
  color: var(--c-text-2);
  font-size: var(--t-sm);
  text-decoration: none;
}
.ft__nav a:hover { color: var(--c-accent); text-decoration: underline; }
.ft__meta { flex-basis: 100%; margin: 0; color: var(--c-text-3); font-size: var(--t-xs); }

/* ============================================================================
   4. ACCESSIBILITY / UTILITY PRIMITIVES
   ========================================================================== */
.visually-hidden,
.sr-only {
  position: absolute !important;
  inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Numbers / identifiers: tabular, monospaced, isolated LTR so they never
   reorder under RTL. Applied to phone numbers, registry ids, dates. */
.num {
  font-family: var(--font-num);
  font-feature-settings: "tnum" 1, "lnum" 1;
  font-variant-numeric: tabular-nums lining-nums;
  direction: ltr;
  unicode-bidi: isolate;
}

.muted { color: var(--c-text-3); }
.caps {
  text-transform: uppercase;
  letter-spacing: var(--ls-caps);
  font-size: var(--t-xs);
  color: var(--c-text-3);
}

/* Section helpers */
.section { margin-block-end: var(--s-8); scroll-margin-block-start: calc(var(--header-h) + var(--s-4)); }
.section__head { max-inline-size: 70ch; margin-block-end: var(--s-5); }
.section__title { margin: 0 0 var(--s-2); font-size: var(--t-h2); line-height: var(--lh-tight); }
.section__lede  { margin: 0; color: var(--c-text-2); font-size: var(--t-h4); }
.stack > * + * { margin-block-start: var(--s-4); }
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-3);
}

/* ============================================================================
   5. COMPONENTS
   ========================================================================== */

/* ── 5.1 Panel / card grid ── */
.panel {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--s-5);
  box-shadow: var(--shadow-1);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--s-4);
  margin: 0;
  padding: 0;
  list-style: none;
}
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--s-5);
  box-shadow: var(--shadow-1);
}
.card__glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 40px; block-size: 40px;
  margin-block-end: var(--s-3);
  border-radius: var(--r-md);
  background: var(--c-accent-soft);
  color: var(--c-accent);
  font-size: 1.15rem;
}
.card__title { margin-block-end: var(--s-2); font-size: var(--t-h4); }
.card__body { margin: 0; color: var(--c-text-2); font-size: var(--t-sm); }

/* ── 5.2 How-it-works steps (ordered) ── */
.steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--s-4);
  margin: 0;
  padding: 0;
  list-style: none;
}
.step {
  position: relative;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--s-5);
}
.step__title { margin-block-end: var(--s-2); font-size: var(--t-h4); color: var(--c-text); }
.step__body { margin: 0; color: var(--c-text-2); font-size: var(--t-sm); }

/* ── 5.3 Security checklist ── */
.checklist {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--s-4);
  margin: 0 0 var(--s-5);
  padding: 0;
  list-style: none;
}
.check {
  display: flex;
  gap: var(--s-3);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--s-4);
}
.check__glyph { flex: 0 0 auto; color: var(--c-up); font-weight: var(--fw-bold); }
.check__title { margin: 0 0 var(--s-1); font-size: var(--t-body); font-weight: var(--fw-semi); }
.check__body { margin: 0; color: var(--c-text-2); font-size: var(--t-sm); }

/* ── 5.4 Contact block ── */
.contact-list { margin: 0; }
.contact-list dt {
  text-transform: uppercase;
  letter-spacing: var(--ls-caps);
  font-size: var(--t-xs);
  color: var(--c-text-3);
  margin-block-end: var(--s-1);
}
.contact-list dd { margin: 0 0 var(--s-4); font-size: var(--t-h4); color: var(--c-text); }

/* ── 5.5 Buttons ── */
.btn {
  --_bg: var(--c-surface-3);
  --_fg: var(--c-text);
  --_bd: var(--c-border-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  min-block-size: var(--tap);
  padding-inline: var(--s-5);
  padding-block: var(--s-2);
  border: 1px solid var(--_bd);
  border-radius: var(--r-md);
  background: var(--_bg);
  color: var(--_fg);
  font-weight: var(--fw-semi);
  font-size: var(--t-body);
  line-height: 1.1;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
              color var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}
.btn:hover { background: color-mix(in srgb, var(--_bg) 86%, var(--c-text)); color: var(--_fg); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn[disabled], .btn[aria-disabled="true"] {
  opacity: .55;
  cursor: not-allowed;
  pointer-events: none;
}
.btn[aria-busy="true"] { cursor: progress; }

.btn--primary {
  --_bg: var(--c-accent);
  --_fg: var(--c-accent-ink);
  --_bd: transparent;
}
.btn--primary:hover { --_bg: var(--c-accent-hover); background: var(--_bg); }
.btn--primary:active { --_bg: var(--c-accent-press); }

.btn--ghost {
  --_bg: transparent;
  --_fg: var(--c-text);
  --_bd: var(--c-border-strong);
}
.btn--sm { min-block-size: var(--tap); padding-inline: var(--s-4); font-size: var(--t-sm); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-inline-size: var(--tap);
  min-block-size: var(--tap);
  padding: var(--s-2);
  border: 1px solid transparent;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--c-text-2);
  cursor: pointer;
}
.icon-btn:hover { background: var(--c-surface-3); color: var(--c-text); }
.icon-btn svg { inline-size: 20px; block-size: 20px; }

/* ── 5.6 Alert / notice (legal banners) ── */
.alert {
  display: flex;
  gap: var(--s-3);
  margin-block-end: var(--s-4);
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-md);
  border: 1px solid var(--c-border);
  border-inline-start-width: 4px;
  background: var(--c-surface);
  color: var(--c-text);
}
.alert--info    { border-inline-start-color: var(--c-info); background: var(--c-info-soft); }
.alert--warn    { border-inline-start-color: var(--c-warn); background: var(--c-warn-soft); }
.alert--error   { border-inline-start-color: var(--c-down); background: var(--c-down-soft); }
.alert--success { border-inline-start-color: var(--c-up);   background: var(--c-up-soft); }

/* ── 5.7 Toast ── */
.toast-region {
  position: fixed;
  inset-block-end: var(--s-4);
  inset-inline-end: var(--s-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  max-inline-size: min(360px, calc(100vw - var(--s-6)));
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-4);
  background: var(--c-surface-2);
  color: var(--c-text);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-3);
  font-size: var(--t-sm);
  animation: af-toast-in var(--dur-slow) var(--ease);
}
.toast--success { border-inline-start: 4px solid var(--c-up); }
.toast--error   { border-inline-start: 4px solid var(--c-down); }
.toast__close {
  margin-inline-start: auto;
  background: none; border: 0; cursor: pointer;
  color: var(--c-text-3); min-inline-size: 28px; min-block-size: 28px;
}
.toast__close:hover { color: var(--c-text); }
@keyframes af-toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 5.8 Language switcher ── */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}
.lang-switch select {
  min-block-size: var(--tap);
  padding-inline: var(--s-3);
  padding-block: var(--s-1);
  background: var(--c-surface-3);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  color: var(--c-text);
  cursor: pointer;
}
.lang-switch select:hover { border-color: var(--c-border-strong); }

/* ── 5.9 Hero (index) ── */
.hero {
  position: relative;
  padding-block: var(--s-8) var(--s-7);
  display: grid;
  gap: var(--s-4);
}
.hero__eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: var(--ls-caps);
  font-size: var(--t-sm);
  font-weight: var(--fw-semi);
  color: var(--c-accent);
}
.hero__title { font-size: var(--t-display); margin: 0; max-inline-size: 24ch; }
.hero__subtitle { font-size: var(--t-h4); color: var(--c-text-2); max-inline-size: 62ch; margin: 0; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-block-start: var(--s-2); }
.hero__trustline {
  margin: var(--s-2) 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-2);
  color: var(--c-text-3);
  font-size: var(--t-sm);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 80% at 80% 0%,
      color-mix(in srgb, var(--c-accent) 12%, transparent), transparent 70%);
  pointer-events: none;
}

/* ── 5.10 Prose (legal pages) ── */
.prose { max-inline-size: 70ch; }
.prose h2 { margin-block-start: var(--s-6); }
.prose h3 { margin-block-start: var(--s-5); }
.prose p, .prose li { color: var(--c-text-2); }
.prose .alert p { margin: 0; color: var(--c-text); }
.prose__toc {
  font-size: var(--t-sm);
  color: var(--c-text-3);
}

/* ── 5.11 Not-found (404) page ── */
.notfound {
  display: grid;
  justify-items: center;
  align-content: center;
  gap: var(--s-3);
  min-block-size: 50vh;
  text-align: center;
}
.notfound__code {
  font-size: var(--t-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--c-accent);
  margin: 0;
}
.notfound__cta { justify-content: center; margin-block-start: var(--s-4); }

/* ── 5.12 Pills / trust badges ── */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  padding: 2px var(--s-2);
  border-radius: var(--r-pill);
  font-size: var(--t-xs);
  font-weight: var(--fw-med);
  border: 1px solid var(--c-border);
  color: var(--c-text-2);
  background: var(--c-surface-3);
}

/* ============================================================================
   6. RESPONSIVE
   ========================================================================== */
@media (max-width: 600px) {
  main.shell { padding-block: var(--s-5) var(--s-7); }
  .panel { padding: var(--s-4); }
  .card, .step { padding: var(--s-4); }
  .hero { padding-block: var(--s-6) var(--s-6); }
  .ft__nav { margin-inline-start: 0; flex-basis: 100%; }
}