/* ==========================================================================
   AI Labor Advisor — Landing Page Stylesheet
   Vanilla CSS3. Mobile-first. Supports RTL (Arabic, default) and LTR (English)
   via the [dir] attribute set on <html> by script.js.
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --color-primary: #0E7C7B;
  --color-primary-dark: #095857;
  --color-primary-light: #E6F5F4;
  --color-accent: #2AB6A6;
  --color-ink: #12232B;
  --color-body: #3E4C53;
  --color-muted: #6B7A80;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F9F8;
  --color-border: #E3ECEA;
  --color-white: #FFFFFF;
  --color-danger: #C4453C;
  --color-warning-bg: #FFF7E6;
  --color-warning-border: #F1D9A0;

  --font-arabic: "Tajawal", "IBM Plex Sans Arabic", "Noto Sans Arabic", "Segoe UI", Tahoma, sans-serif;
  --font-latin: "Inter", "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(18, 35, 43, 0.06);
  --shadow-md: 0 8px 24px rgba(18, 35, 43, 0.10);
  --shadow-lg: 0 20px 48px rgba(18, 35, 43, 0.14);

  --container-w: 1160px;
  --header-h: 76px;
  --transition: 180ms ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  background: var(--color-bg);
  color: var(--color-body);
  font-family: var(--font-arabic);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html[lang="en"] body { font-family: var(--font-latin); }

img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Focus states (accessibility) ---------- */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) { outline: none; }

.skip-link {
  position: absolute;
  top: -100px;
  inset-inline-start: 12px;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition);
}
.skip-link:focus { top: 12px; }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 20px;
}
.section { padding-block: 88px; }
.section-alt { background: var(--color-bg-alt); }
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-sub { margin-top: 12px; color: var(--color-muted); font-size: 1.05rem; }

.eyebrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
  text-transform: uppercase;
}
html[lang="ar"] .eyebrow { text-transform: none; }

h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); font-weight: 800; line-height: 1.25; color: var(--color-ink); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800; color: var(--color-ink); }
h3 { font-size: 1.15rem; font-weight: 700; color: var(--color-ink); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.5);
}
.btn-sm { padding: 10px 20px; font-size: 0.9rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; margin-inline-end: auto; }
.brand-logo { border-radius: 8px; }
.brand-name { font-weight: 800; font-size: 1.05rem; color: var(--color-ink); }

.primary-nav ul { display: flex; gap: 28px; }
.primary-nav a {
  font-weight: 600;
  color: var(--color-body);
  padding-block: 6px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.primary-nav a:hover { color: var(--color-primary); border-color: var(--color-primary); }

.header-actions { display: flex; align-items: center; gap: 14px; }

.lang-switch {
  display: flex;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px;
}
.lang-btn {
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-muted);
  transition: background var(--transition), color var(--transition);
}
.lang-btn[aria-pressed="true"] { background: var(--color-primary); color: #fff; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle-bar { width: 24px; height: 2px; background: var(--color-ink); border-radius: 2px; }

/* ---------- Hero ---------- */
.hero { padding-block: 64px 96px; overflow: hidden; position: relative; }
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 480px;
  background: radial-gradient(60% 60% at 50% 30%, var(--color-primary-light) 0%, transparent 70%);
  z-index: -1;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}
.hero-desc { margin-top: 18px; font-size: 1.1rem; max-width: 52ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.store-badge { display: inline-block; border-radius: 10px; transition: transform var(--transition); }
.store-badge:hover { transform: translateY(-2px); }
.trust-note {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 28px;
  color: var(--color-muted);
  font-size: 0.9rem;
  max-width: 46ch;
}
.trust-note svg { flex-shrink: 0; color: var(--color-primary); margin-top: 2px; }

.hero-media { display: flex; justify-content: center; }
.hero-mockup-img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ---------- About ---------- */
.about-grid { display: grid; gap: 24px; }
.about-copy p { margin-bottom: 16px; font-size: 1.05rem; }
.about-audience {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.about-audience li {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 8px 16px;
  border-radius: 999px;
}

/* ---------- Features ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon { font-size: 1.8rem; display: inline-block; margin-bottom: 14px; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { font-size: 0.95rem; color: var(--color-muted); }

/* ---------- Download ---------- */
.download-section {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  border-radius: var(--radius-lg);
  margin-inline: 20px;
}
.download-section .container { max-width: var(--container-w); }
.download-section .eyebrow { color: #BFF2ED; }
.download-section h2, .download-section .section-sub { color: #fff; }
.download-section .section-sub { color: #D8F1EE; }

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 12px;
}
.download-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.download-card img[width="140"] { background: #fff; border-radius: 12px; padding: 8px; }
.download-compat { font-size: 0.85rem; color: #D8F1EE; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 12px; max-width: 780px; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: start;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-ink);
}
.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-question[aria-expanded="true"]::after { transform: rotate(45deg); }
.faq-answer { padding: 0 22px 20px; color: var(--color-muted); }

/* ---------- Disclaimer ---------- */
.disclaimer-section { padding-block: 56px 96px; }
.disclaimer-box {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  padding: 32px;
}
.disclaimer-box h2 { font-size: 1.3rem; margin-bottom: 14px; }
.disclaimer-box p { margin-bottom: 10px; font-size: 0.95rem; color: var(--color-body); }
.disclaimer-box p:last-child { margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-ink);
  color: #C9D6D9;
  padding-block: 56px 28px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.footer-brand { display: flex; flex-direction: column; gap: 10px; grid-column: 1 / -1; }
.footer-brand img { border-radius: 8px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand p { font-size: 0.9rem; color: #9DB0B4; max-width: 42ch; }

.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a:hover { color: #fff; }

.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid #33474C;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700;
  transition: background var(--transition), border-color var(--transition);
}
.footer-social a:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

.footer-stores { display: flex; flex-direction: column; gap: 10px; }
.footer-lang { display: flex; gap: 10px; grid-column: 1 / -1; margin-top: 8px; }
.footer-lang .lang-btn {
  background: #1B2C32;
  border: 1px solid #33474C;
  color: #C9D6D9;
}
.footer-lang .lang-btn[aria-pressed="true"] { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.footer-copy {
  grid-column: 1 / -1;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid #26383D;
  font-size: 0.85rem;
  color: #839195;
}

/* ---------- Redirect overlay ---------- */
.redirect-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.redirect-overlay[hidden] { display: none; }
.redirect-box { text-align: center; color: #fff; max-width: 320px; }
.redirect-spinner {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 4px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  margin: 0 auto 20px;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.redirect-box p { margin-bottom: 20px; font-size: 1.05rem; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .primary-nav {
    position: fixed;
    top: var(--header-h);
    inset-inline: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
  }
  .primary-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .primary-nav ul { flex-direction: column; gap: 0; padding: 8px 20px 20px; }
  .primary-nav a { display: block; padding-block: 14px; border-bottom: 1px solid var(--color-border); }
  .nav-toggle { display: flex; }
  .header-actions .btn-sm { display: none; }

  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-media { order: -1; }
  .hero-mockup-img { max-width: 320px; }
  .trust-note { margin-inline: auto; }
}

@media (max-width: 640px) {
  .section { padding-block: 56px; }
  .feature-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  h1 { font-size: 2rem; }
}
