/* ==========================================================================
   Concept Media — Base layer
   Reset, typography primitives, layout primitives, accessibility utilities.
   Uses CSS logical properties throughout so LTR/RTL share one stylesheet.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  color-scheme: dark;
  scroll-padding-block-start: calc(var(--header-h) + var(--space-4));
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img, svg, video, picture { display: block; max-width: 100%; height: auto; }
img { font-style: italic; } /* alt text styled if an image fails */
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
h1, h2, h3, h4, p, figure, blockquote, ul, ol { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }

::selection { background: var(--cm-orange); color: var(--cm-black); }

/* ---------- Focus: always visible for keyboard users ---------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Accessibility utilities ---------- */
.visually-hidden {
  position: absolute !important;
  inline-size: 1px; block-size: 1px;
  margin: -1px; padding: 0; border: 0;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  z-index: var(--z-skip);
  padding: var(--space-3) var(--space-5);
  background: var(--cm-orange);
  color: var(--cm-black);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-pill);
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--dur-micro) var(--ease-standard);
}
.skip-link:focus-visible { transform: none; }

/* ---------- Layout primitives ---------- */
.container {
  inline-size: 100%;
  max-inline-size: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

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

.stack > * + * { margin-block-start: var(--stack-space, var(--space-stack)); }

.section { padding-block: var(--space-section); }

/* ---------- Type primitives ---------- */
.t-display-xl, .t-display-l, .t-h1, .t-h2, .t-h3 {
  font-family: var(--font-display);
  text-wrap: balance;
}
.t-display-xl { font-size: var(--text-display-xl); line-height: var(--leading-display); letter-spacing: var(--tracking-display); font-weight: var(--weight-bold); }
.t-display-l  { font-size: var(--text-display-l);  line-height: var(--leading-display); letter-spacing: var(--tracking-display); font-weight: var(--weight-bold); }
.t-h1 { font-size: var(--text-h1); line-height: var(--leading-heading); letter-spacing: var(--tracking-heading); font-weight: var(--weight-bold); }
.t-h2 { font-size: var(--text-h2); line-height: var(--leading-heading); letter-spacing: var(--tracking-heading); font-weight: var(--weight-semibold); }
.t-h3 { font-size: var(--text-h3); line-height: var(--leading-snug); font-weight: var(--weight-semibold); }
.t-lead { font-size: var(--text-lead); line-height: 1.5; font-weight: var(--weight-light); max-inline-size: var(--measure); text-wrap: pretty; }
.t-body { font-size: var(--text-body); line-height: var(--leading-body); max-inline-size: var(--measure); text-wrap: pretty; }
.t-small { font-size: var(--text-small); line-height: 1.55; }
.t-muted { color: var(--color-text-muted); }

/* The "Concept / Media" weight-contrast device: heavy word + thin word */
.t-thin  { font-weight: var(--weight-thin); }
.t-heavy { font-weight: var(--weight-bold); }
:lang(ar) .t-thin { font-weight: var(--weight-light); } /* Arabic 200 is too frail on dark backgrounds */

.t-label {
  font-family: var(--font-body);
  font-size: var(--text-label);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  line-height: 1.4;
}
:lang(ar) .t-label { text-transform: none; font-weight: var(--weight-semibold); }

.t-accent { color: var(--color-accent); }

/* Numerals and Latin fragments inside Arabic text keep Latin metrics */
:lang(ar) .latin, :lang(ar) [lang="en"] { font-family: var(--font-latin); }

/* ---------- Components (foundational — expanded in Milestone 2) ---------- */
.btn {
  --btn-bg: var(--cm-orange);
  --btn-fg: var(--color-on-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-block-size: 48px;               /* touch target */
  white-space: nowrap;
  padding-inline: var(--space-6);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background-color var(--dur-micro) var(--ease-standard),
              color var(--dur-micro) var(--ease-standard),
              border-color var(--dur-micro) var(--ease-standard),
              transform var(--dur-micro) var(--ease-standard);
}
:lang(ar) .btn { letter-spacing: 0; font-size: 1rem; }
.btn:hover { --btn-bg: var(--cm-orange-glow); }
.btn:active { transform: scale(0.98); }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--color-text); border-color: var(--color-line-strong); }
.btn--ghost:hover { --btn-bg: var(--cm-white); --btn-fg: var(--cm-black); border-color: var(--cm-white); }
.btn__icon { inline-size: 1em; block-size: 1em; transform: scaleX(var(--dir)); } /* arrows mirror in RTL */

.link-underline {
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size var(--dur-ui) var(--ease-out);
  padding-block-end: 2px;
}
[dir="rtl"] .link-underline { background-position: 100% 100%; }
.link-underline:hover, .link-underline:focus-visible { background-size: 100% 1px; }

.badge-temp {
  position: absolute;
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  z-index: var(--z-raised);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(4, 4, 4, 0.78);
  border: 1px dashed var(--cm-orange);
  color: var(--cm-orange);
  font-family: var(--font-latin);
  font-size: 10px;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- Motion safety ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}