/* ============================================================================
   base.css — fonts, reset, typography, RTL foundations (docs/DESIGN_SYSTEM.md
   §3–§5). Uses token variables only — no raw color/size values here.
   Layers: tokens.css → base.css → components.css (→ pages/*.css)
   ============================================================================ */

/* ---- Self-hosted fonts (§3.1) — woff2 only, NO CDN at runtime -------------
   Arabic glyphs come from IBM Plex Sans Arabic (arabic subset, 4 static
   weights). Latin glyphs, digits and punctuation fall through to IBM Plex Sans
   (latin subset, one variable file covering 400–700) — same Plex design, so
   Western digits render identically in both UI languages (§3.2). */

@font-face {
  font-family: "IBM Plex Sans Arabic";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/plex-sans-arabic-400-arabic.woff2") format("woff2");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC, U+102E0-102FB, U+10E60-10E7E, U+10EC2-10EC4, U+10EFC-10EFF, U+1EE00-1EE03, U+1EE05-1EE1F, U+1EE21-1EE22, U+1EE24, U+1EE27, U+1EE29-1EE32, U+1EE34-1EE37, U+1EE39, U+1EE3B, U+1EE42, U+1EE47, U+1EE49, U+1EE4B, U+1EE4D-1EE4F, U+1EE51-1EE52, U+1EE54, U+1EE57, U+1EE59, U+1EE5B, U+1EE5D, U+1EE5F, U+1EE61-1EE62, U+1EE64, U+1EE67-1EE6A, U+1EE6C-1EE72, U+1EE74-1EE77, U+1EE79-1EE7C, U+1EE7E, U+1EE80-1EE89, U+1EE8B-1EE9B, U+1EEA1-1EEA3, U+1EEA5-1EEA9, U+1EEAB-1EEBB, U+1EEF0-1EEF1;
}
@font-face {
  font-family: "IBM Plex Sans Arabic";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/plex-sans-arabic-500-arabic.woff2") format("woff2");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC, U+102E0-102FB, U+10E60-10E7E, U+10EC2-10EC4, U+10EFC-10EFF, U+1EE00-1EE03, U+1EE05-1EE1F, U+1EE21-1EE22, U+1EE24, U+1EE27, U+1EE29-1EE32, U+1EE34-1EE37, U+1EE39, U+1EE3B, U+1EE42, U+1EE47, U+1EE49, U+1EE4B, U+1EE4D-1EE4F, U+1EE51-1EE52, U+1EE54, U+1EE57, U+1EE59, U+1EE5B, U+1EE5D, U+1EE5F, U+1EE61-1EE62, U+1EE64, U+1EE67-1EE6A, U+1EE6C-1EE72, U+1EE74-1EE77, U+1EE79-1EE7C, U+1EE7E, U+1EE80-1EE89, U+1EE8B-1EE9B, U+1EEA1-1EEA3, U+1EEA5-1EEA9, U+1EEAB-1EEBB, U+1EEF0-1EEF1;
}
@font-face {
  font-family: "IBM Plex Sans Arabic";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/plex-sans-arabic-600-arabic.woff2") format("woff2");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC, U+102E0-102FB, U+10E60-10E7E, U+10EC2-10EC4, U+10EFC-10EFF, U+1EE00-1EE03, U+1EE05-1EE1F, U+1EE21-1EE22, U+1EE24, U+1EE27, U+1EE29-1EE32, U+1EE34-1EE37, U+1EE39, U+1EE3B, U+1EE42, U+1EE47, U+1EE49, U+1EE4B, U+1EE4D-1EE4F, U+1EE51-1EE52, U+1EE54, U+1EE57, U+1EE59, U+1EE5B, U+1EE5D, U+1EE5F, U+1EE61-1EE62, U+1EE64, U+1EE67-1EE6A, U+1EE6C-1EE72, U+1EE74-1EE77, U+1EE79-1EE7C, U+1EE7E, U+1EE80-1EE89, U+1EE8B-1EE9B, U+1EEA1-1EEA3, U+1EEA5-1EEA9, U+1EEAB-1EEBB, U+1EEF0-1EEF1;
}
@font-face {
  font-family: "IBM Plex Sans Arabic";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/plex-sans-arabic-700-arabic.woff2") format("woff2");
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0897-08E1, U+08E3-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FE74, U+FE76-FEFC, U+102E0-102FB, U+10E60-10E7E, U+10EC2-10EC4, U+10EFC-10EFF, U+1EE00-1EE03, U+1EE05-1EE1F, U+1EE21-1EE22, U+1EE24, U+1EE27, U+1EE29-1EE32, U+1EE34-1EE37, U+1EE39, U+1EE3B, U+1EE42, U+1EE47, U+1EE49, U+1EE4B, U+1EE4D-1EE4F, U+1EE51-1EE52, U+1EE54, U+1EE57, U+1EE59, U+1EE5B, U+1EE5D, U+1EE5F, U+1EE61-1EE62, U+1EE64, U+1EE67-1EE6A, U+1EE6C-1EE72, U+1EE74-1EE77, U+1EE79-1EE7C, U+1EE7E, U+1EE80-1EE89, U+1EE8B-1EE9B, U+1EEA1-1EEA3, U+1EEA5-1EEA9, U+1EEAB-1EEBB, U+1EEF0-1EEF1;
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400 700;   /* variable font */
  font-display: swap;
  src: url("../fonts/plex-sans-var-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---- Reset ----------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  /* Wizard slide direction follows reading direction (§5.5) */
  --slide-dir: 1;
}
html[dir="rtl"] { --slide-dir: -1; }

body {
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--bg);
  min-block-size: 100svh;
  -webkit-font-smoothing: antialiased;
}

img, svg, video, canvas { display: block; max-inline-size: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
ul[class], ol[class] { list-style: none; padding: 0; }
table { border-collapse: collapse; }
fieldset { border: 0; padding: 0; }

/* ---- Typography (§3.2) ------------------------------------------------------ */

h1, .text-h1 { font-size: var(--fs-h1); line-height: var(--lh-h1); font-weight: 600; }
h2, .text-h2 { font-size: var(--fs-h2); line-height: var(--lh-h2); font-weight: 600; }
h3, h4, .text-h3 { font-size: var(--fs-h3); line-height: var(--lh-h3); font-weight: 600; }

/* One hero number/title per page maximum */
.text-display { font-size: var(--fs-display); line-height: var(--lh-display); font-weight: 700; }

.text-body-lg { font-size: var(--fs-body-lg); line-height: var(--lh-body-lg); }
.text-sm      { font-size: var(--fs-body-sm); line-height: var(--lh-body-sm); }
.text-caption { font-size: var(--fs-caption); line-height: var(--lh-caption); font-weight: 500; }
.text-muted   { color: var(--ink-2); }
.text-faint   { color: var(--ink-3); }

/* Tabular digits: table columns and timers only (§3.2) */
.tabular { font-variant-numeric: tabular-nums; }

/* Long-form reading (terms, reports): cap the measure (§3.2) */
.prose { max-inline-size: var(--measure); }
.prose p + p, .prose h2, .prose h3 { margin-block-start: var(--space-4); }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

::placeholder { color: var(--ink-3); opacity: 1; }

/* ---- Unified focus ring (§7) — never remove without replacement ------------- */

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}
:focus:not(:focus-visible) { outline: none; }

/* ---- Layout ------------------------------------------------------------------ */

.container {
  max-inline-size: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* ---- Icons (§6) — inline SVG via icon() helper -------------------------------- */

.icon { flex-shrink: 0; }
/* Directional icons (arrows…) mirror in RTL; play/bell/etc. never do (§5.4) */
[dir="rtl"] .icon-directional { transform: scaleX(-1); }

.icon--spin { animation: icon-spin 900ms linear infinite; }
@keyframes icon-spin { to { transform: rotate(360deg); } }

/* ---- Accessibility helpers ------------------------------------------------------ */

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

/* Skip link: off-screen until it receives keyboard focus, then pinned to the
   top-start corner so keyboard users can jump straight to the main content. */
.skip-link {
  position: absolute;
  inset-block-start: var(--space-2);
  inset-inline-start: var(--space-2);
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  transform: translateY(-250%);
  transition: transform 150ms ease;
}
.skip-link:focus { transform: translateY(0); }

/* Honeypot field (Security::honeypotField) — off-screen for humans */
.hp-trap {
  position: absolute;
  inset-inline-start: -9999px;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
}

/* Mixed-direction content: numbers/latin inside Arabic sentences use <bdi>;
   full English blocks carry dir="ltr" lang="en" with text-align:start (§5.3) */
[dir] { unicode-bidi: isolate; }

/* ---- Reduced motion (§4.4) — everything collapses to instant ------------------- */

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