/* ═══════════════════════════════════════════════
   Landing Base — Shared Design System
   All public-facing pages share this file.
   ═══════════════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
  --bg: #f8f7fc;
  --bg-alt: #f0edf8;
  --surface: #ffffff;
  --surface-hover: #faf8ff;
  --ink: #1a1535;
  --ink-2: #4a4562;
  --ink-3: #7a7590;
  --primary: #6366f1;
  --primary-soft: rgba(99,102,241,.1);
  --accent: #a855f7;
  --accent-soft: rgba(168,85,247,.1);
  --pink: #ec4899;
  --emerald: #10b981;
  --amber: #f59e0b;
  --cyan: #06b6d4;
  --rose: #f43f5e;
  --sky: #0ea5e9;
  --border: rgba(99,102,241,.1);
  --border-s: rgba(0,0,0,.06);
  --glass: rgba(255,255,255,.75);
  --glass-border: rgba(99,102,241,.15);
  --sh-xs: 0 1px 2px rgba(0,0,0,.04);
  --sh-sm: 0 2px 8px rgba(0,0,0,.05);
  --sh-md: 0 8px 30px rgba(0,0,0,.07);
  --sh-lg: 0 16px 50px rgba(0,0,0,.10);
  --sh-xl: 0 24px 70px rgba(0,0,0,.13);
  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 28px;
  --ease: cubic-bezier(.16,1,.3,1);
  --mw: 1180px;
}

[data-theme="dark"] {
  --bg: #14122a;
  --bg-alt: #1b1834;
  --surface: #211e3a;
  --surface-hover: #2a264a;
  --ink: #ece8f5;
  --ink-2: #b5aed0;
  --ink-3: #8a83a6;
  --primary: #818cf8;
  --primary-soft: rgba(129,140,248,.14);
  --accent: #c084fc;
  --accent-soft: rgba(192,132,252,.14);
  --pink: #f472b6;
  --emerald: #34d399;
  --amber: #fbbf24;
  --cyan: #22d3ee;
  --rose: #fb7185;
  --sky: #38bdf8;
  --border: rgba(129,140,248,.12);
  --border-s: rgba(255,255,255,.07);
  --glass: rgba(20,18,42,.75);
  --glass-border: rgba(129,140,248,.15);
  --sh-xs: 0 1px 2px rgba(0,0,0,.2);
  --sh-sm: 0 2px 8px rgba(0,0,0,.2);
  --sh-md: 0 8px 30px rgba(0,0,0,.25);
  --sh-lg: 0 16px 50px rgba(0,0,0,.3);
  --sh-xl: 0 24px 70px rgba(0,0,0,.35);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'IBM Plex Sans Arabic', 'Cairo', system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* ── Aurora Background ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 70% -5%, rgba(99,102,241,.14), transparent),
    radial-gradient(ellipse 50% 40% at 10% 30%, rgba(6,182,212,.08), transparent),
    radial-gradient(ellipse 40% 50% at 85% 60%, rgba(236,72,153,.07), transparent),
    radial-gradient(ellipse 45% 35% at 40% 80%, rgba(245,158,11,.05), transparent),
    var(--bg);
}
[data-theme="dark"] body::before {
  background:
    radial-gradient(ellipse 60% 50% at 70% -5%, rgba(99,102,241,.12), transparent),
    radial-gradient(ellipse 50% 40% at 10% 30%, rgba(6,182,212,.06), transparent),
    radial-gradient(ellipse 40% 50% at 85% 60%, rgba(168,85,247,.08), transparent),
    var(--bg);
}

body::after {
  content: '';
  position: fixed;
  width: 500px; height: 500px;
  border-radius: 50%;
  top: -150px;
  inset-inline-end: -100px;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle, rgba(99,102,241,.08), rgba(168,85,247,.04), transparent 70%);
  animation: lb-auroraFloat 20s ease-in-out infinite alternate;
}
[data-theme="dark"] body::after {
  background: radial-gradient(circle, rgba(99,102,241,.06), rgba(168,85,247,.03), transparent 70%);
}
@keyframes lb-auroraFloat {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(-60px, 40px) scale(1.1); }
  66%  { transform: translate(30px, -20px) scale(.95); }
  100% { transform: translate(-15px, 60px) scale(1.05); }
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

.container {
  width: min(100% - 40px, var(--mw));
  margin: 0 auto;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--r-sm);
  border: 1.5px solid transparent;
  font-weight: 600;
  font-size: .95rem;
  font-family: inherit;
  transition: all .25s var(--ease);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 8px 25px rgba(99,102,241,.25);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; inset-inline-start: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent);
  transition: inset-inline-start .5s ease;
}
.btn-primary:hover::before { inset-inline-start: 100%; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px rgba(99,102,241,.35);
}

.btn-outline {
  border-color: var(--border);
  color: var(--ink);
  background: var(--surface);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
}

.btn-ghost {
  background: var(--primary-soft);
  color: var(--primary);
}
.btn-ghost:hover { background: rgba(99,102,241,.18); }

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: var(--r-md);
}

/* Color buttons */
.btn-cyan {
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
  box-shadow: 0 6px 20px rgba(6,182,212,.2);
}
.btn-cyan:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(6,182,212,.3); }

.btn-amber {
  background: linear-gradient(135deg, var(--amber), var(--rose));
  color: #fff;
  box-shadow: 0 6px 20px rgba(245,158,11,.2);
}
.btn-amber:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(245,158,11,.3); }

.btn-purple {
  background: linear-gradient(135deg, var(--accent), var(--pink));
  color: #fff;
  box-shadow: 0 6px 20px rgba(168,85,247,.2);
}
.btn-purple:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(168,85,247,.3); }

.btn-emerald {
  background: linear-gradient(135deg, var(--emerald), var(--sky));
  color: #fff;
  box-shadow: 0 6px 20px rgba(16,185,129,.2);
}
.btn-emerald:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(16,185,129,.3); }

/* ── Navbar ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248,247,252,.85);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: none;
}
.nav::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--pink), var(--cyan), var(--emerald), var(--amber), var(--primary));
  background-size: 200% 100%;
  animation: lb-navRainbow 8s linear infinite;
  opacity: .8;
}
@keyframes lb-navRainbow {
  0%   { background-position: 0% 0; }
  100% { background-position: 200% 0; }
}
[data-theme="dark"] .nav {
  background: rgba(20,18,42,.88);
}
[data-theme="dark"] .nav::after {
  opacity: .5;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  gap: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--ink);
}
.brand img {
  width: 36px; height: 36px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: var(--sh-sm);
}
.brand-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: .85rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-menu a {
  padding: 6px 10px;
  border-radius: 8px;
  font-weight: 500;
  font-size: .84rem;
  color: var(--ink-2);
  transition: all .2s ease;
  white-space: nowrap;
}
.nav-menu a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.nav-menu a.active {
  color: var(--primary);
  background: var(--primary-soft);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.nav-actions .btn {
  padding: 8px 16px;
  font-size: .84rem;
}

.theme-btn {
  width: 34px; height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border-s);
  background: var(--surface);
  color: var(--ink-2);
  display: grid; place-items: center;
  font-size: .85rem;
  transition: all .2s ease;
  padding: 0;
}
.theme-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-soft);
}

.menu-toggle {
  display: none;
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border-s);
  background: var(--surface);
  color: var(--ink);
  font-size: .95rem;
  place-items: center;
  padding: 0;
}

.nav-actions-mobile {
  display: none;
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 89;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.nav-overlay.show { display: block; }

/* ── Section Common ── */
.section {
  padding: 80px 0;
  position: relative;
}
.section-alt {
  background: var(--bg-alt);
}

.sec-head {
  max-width: 600px;
  margin-bottom: 44px;
}
.sec-head.centered {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.sec-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 10px;
  padding: 4px 14px 4px 6px;
  background: var(--primary-soft);
  border-radius: 999px;
  border: 1px solid var(--border);
}
.sec-tag::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  flex-shrink: 0;
  animation: lb-tagDot 2s ease-in-out infinite;
}
@keyframes lb-tagDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .5; transform: scale(.7); }
}

.sec-head h2 {
  font-size: clamp(1.7rem, 1.4rem + 1.2vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}
.sec-head p {
  color: var(--ink-2);
  font-size: 1.02rem;
  line-height: 1.7;
}

/* ── Footer ── */
.footer {
  padding: 50px 0 28px;
  border-top: 1px solid var(--border-s);
  background: var(--bg-alt);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}

.footer-brand p {
  color: var(--ink-2);
  font-size: .9rem;
  line-height: 1.7;
  margin-top: 10px;
}

.footer-persona {
  margin-top: 14px;
}
.footer-persona img {
  width: 50px; height: 50px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-s);
}

.footer h4 {
  font-size: .92rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-links a {
  display: block;
  color: var(--ink-2);
  font-size: .88rem;
  padding: 4px 0;
  transition: color .2s;
}
.footer-links a:hover {
  color: var(--primary);
}

.copyright {
  padding-top: 20px;
  border-top: 1px solid var(--border-s);
  color: var(--ink-3);
  font-size: .82rem;
  text-align: center;
}

/* ── Scroll Reveal ── */
[data-r] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
[data-r].v {
  opacity: 1;
  transform: translateY(0);
}
[data-stagger] > [data-r]:nth-child(1) { transition-delay: 0ms; }
[data-stagger] > [data-r]:nth-child(2) { transition-delay: 70ms; }
[data-stagger] > [data-r]:nth-child(3) { transition-delay: 140ms; }
[data-stagger] > [data-r]:nth-child(4) { transition-delay: 210ms; }
[data-stagger] > [data-r]:nth-child(5) { transition-delay: 280ms; }
[data-stagger] > [data-r]:nth-child(6) { transition-delay: 350ms; }
[data-stagger] > [data-r]:nth-child(7) { transition-delay: 420ms; }
[data-stagger] > [data-r]:nth-child(8) { transition-delay: 490ms; }

/* ── Accessibility ── */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--primary-soft);
}

/* ═══════════════════════════════════
   Responsive
   ═══════════════════════════════════ */

@media (max-width: 1180px) {
  .nav-menu a { padding: 6px 8px; font-size: .8rem; }
  .nav-actions .btn { padding: 7px 12px; font-size: .8rem; }
}

/* Collapse navbar to hamburger */
@media (max-width: 1024px) {
  .menu-toggle { display: grid; place-items: center; }

  .nav-menu {
    position: fixed;
    top: 64px;
    inset-inline-end: 12px;
    inset-inline-start: 12px;
    background: var(--surface);
    border: 1px solid var(--border-s);
    border-radius: var(--r-lg);
    box-shadow: var(--sh-xl);
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    display: none;
    z-index: 90;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a {
    padding: 12px 16px;
    font-size: .95rem;
    border-radius: var(--r-sm);
    transition: background .2s;
  }
  .nav-menu a:hover {
    background: var(--primary-soft);
  }

  .nav-actions { display: none; }
  .nav-actions-mobile {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--border-s);
  }
  .nav-actions-mobile .btn { font-size: .95rem; padding: 12px 16px; }
}

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 580px) {
  .section { padding: 56px 0; }
  .container { width: calc(100% - 28px); }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-brand { text-align: center; }
  .footer-brand .brand { justify-content: center; }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0s !important;
    animation-delay: 0s !important;
    transition-duration: 0s !important;
  }
  [data-r] { opacity: 1; transform: none; }
}