/* ============================================================
   ADWAIX DESIGN SYSTEM v2.0 — 2026 Trendy
   Based on: Bento Grid + Aurora UI + Soft UI Evolution
   Ref: ui-ux-pro-max-skill reasoning engine
   ============================================================ */

/* Typography — EN: Inter + Plus Jakarta Sans | AR: Tajawal + IBM Plex Sans Arabic */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@600;700;800&family=IBM+Plex+Sans+Arabic:wght@300;400;500;600;700&family=Tajawal:wght@400;500;700;800&display=swap');

:root {
  /* ── Colors ── */
  --c-primary: #3B82F6;
  --c-primary-hover: #2563EB;
  --c-primary-soft: rgba(59, 130, 246, 0.1);
  --c-secondary: #8B5CF6;
  --c-secondary-soft: rgba(139, 92, 246, 0.1);
  --c-accent: #F59E0B;
  --c-accent-hover: #D97706;

  --c-bg: #F8FAFC;
  --c-bg-card: #FFFFFF;
  --c-bg-code: #F1F5F9;
  --c-surface: #F1F5F9;

  --c-text-main: #0F172A;
  --c-text-muted: #64748B;
  --c-text-subtle: #94A3B8;

  --c-border: #E2E8F0;
  --c-border-hover: #CBD5E1;

  --c-success: #10B981;
  --c-error: #EF4444;
  --c-warning: #F59E0B;

  /* ── Typography ── */
  --font-display: 'Plus Jakarta Sans', 'Tajawal', sans-serif;
  --font-heading: 'Plus Jakarta Sans', 'Tajawal', sans-serif;
  --font-body: 'Inter', 'IBM Plex Sans Arabic', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* ── Spacing (4px base) ── */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 20px;
  --s-6: 24px;
  --s-8: 32px;
  --s-10: 40px;
  --s-12: 48px;
  --s-16: 64px;
  --s-20: 80px;

  /* ── Radii ── */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --r-full: 9999px;

  /* ── Shadows (Soft UI Evolution) ── */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.04), 0 1px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.06), 0 4px 12px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 16px 40px -8px rgba(0, 0, 0, 0.08), 0 8px 20px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 24px 56px -12px rgba(0, 0, 0, 0.12), 0 12px 28px -6px rgba(0, 0, 0, 0.07);
  --shadow-glow: 0 0 24px -4px rgba(59, 130, 246, 0.25);
  --shadow-glow-secondary: 0 0 24px -4px rgba(139, 92, 246, 0.25);

  /* ── Gradients ── */
  --grad-primary: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  --grad-aurora: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 33%, #EC4899 66%, #F59E0B 100%);
  --grad-mesh: radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
               radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
               radial-gradient(ellipse at 50% 80%, rgba(236, 72, 153, 0.04) 0%, transparent 50%);
  --grad-card-border: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(139,92,246,0.2), rgba(236,72,153,0.1));
  --grad-subtle: linear-gradient(180deg, rgba(241, 245, 249, 0) 0%, rgba(241, 245, 249, 0.8) 100%);

  /* ── Transitions (UUPM: 150-300ms) ── */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 150ms var(--ease-smooth);
  --t-normal: 250ms var(--ease-smooth);
  --t-slow: 400ms var(--ease-out);

  /* Legacy compat */
  --transition-fast: 200ms var(--ease-smooth);
  --transition-normal: 400ms var(--ease-out);
}

/* Arabic font overrides */
[lang="ar"] {
  --font-display: 'Tajawal', sans-serif;
  --font-heading: 'Tajawal', sans-serif;
  --font-body: 'IBM Plex Sans Arabic', sans-serif;
}

/* ── Base Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-body);
  color: var(--c-text-main);
  background-color: var(--c-bg);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--c-bg);
  background-image: var(--grad-mesh);
  background-attachment: fixed;
}

main {
  flex: 1;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--c-text-main);
  line-height: 1.2;
  margin-bottom: var(--s-4);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: -0.025em;
}

h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

/* Gradient headline utility */
.gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-aurora {
  background: var(--grad-aurora);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  animation: auroraShift 8s ease-in-out infinite;
}

p {
  margin-bottom: var(--s-4);
  color: var(--c-text-muted);
}

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color var(--t-fast);
  cursor: pointer;
}

a:hover {
  color: var(--c-primary-hover);
}

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

/* ── Container ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--s-5);
}

@media (min-width: 1440px) {
  .container { max-width: 1320px; }
}

/* ── Grid ── */
.grid {
  display: grid;
  gap: var(--s-5);
}

.grid-cols-1 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ── Bento Grid (UUPM Style #39) ── */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
}

.bento-grid .bento-wide {
  grid-column: span 2;
}

.bento-grid .bento-tall {
  grid-row: span 2;
}

@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .bento-grid .bento-wide {
    grid-column: span 1;
  }
  .bento-grid .bento-tall {
    grid-row: span 1;
  }
}

/* ── Utility Classes ── */
.text-center { text-align: center; }
.text-muted { color: var(--c-text-muted); }
.text-subtle { color: var(--c-text-subtle); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--s-1); }
.mb-2 { margin-bottom: var(--s-2); }
.mb-3 { margin-bottom: var(--s-3); }
.mb-4 { margin-bottom: var(--s-4); }
.mb-6 { margin-bottom: var(--s-6); }
.mb-8 { margin-bottom: var(--s-8); }
.mb-10 { margin-bottom: var(--s-10); }
.mt-4 { margin-top: var(--s-4); }
.mt-6 { margin-top: var(--s-6); }
.mt-8 { margin-top: var(--s-8); }
.mt-10 { margin-top: var(--s-10); }
.p-4 { padding: var(--s-4); }
.p-5 { padding: var(--s-5); }
.p-6 { padding: var(--s-6); }
.p-8 { padding: var(--s-8); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--s-1); }
.gap-2 { gap: var(--s-2); }
.gap-3 { gap: var(--s-3); }
.gap-4 { gap: var(--s-4); }
.gap-5 { gap: var(--s-5); }
.gap-6 { gap: var(--s-6); }
.hidden { display: none !important; }
.rounded { border-radius: var(--r-md); }
.rounded-lg { border-radius: var(--r-lg); }
.rounded-xl { border-radius: var(--r-xl); }

/* ── Animations ── */

/* Aurora gradient shift */
@keyframes auroraShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Mesh background flow */
@keyframes meshFlow {
  0%, 100% { background-position: 0% 0%; }
  50% { background-position: 100% 100%; }
}

/* Fade-in entrance */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glow pulse */
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px -4px rgba(59, 130, 246, 0.2); }
  50% { box-shadow: 0 0 32px -4px rgba(59, 130, 246, 0.35); }
}

/* Float subtle */
@keyframes floatSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.fade-in {
  animation: fadeIn 0.5s var(--ease-out);
}

.fade-in-up {
  animation: fadeInUp 0.6s var(--ease-out) both;
}

/* Scroll-triggered reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger > *:nth-child(1) { transition-delay: 0ms; }
.stagger > *:nth-child(2) { transition-delay: 80ms; }
.stagger > *:nth-child(3) { transition-delay: 160ms; }
.stagger > *:nth-child(4) { transition-delay: 240ms; }
.stagger > *:nth-child(5) { transition-delay: 320ms; }
.stagger > *:nth-child(6) { transition-delay: 400ms; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}