/* ===== Variables ===== */
:root {
  --bg: #08080b;
  --bg-elevated: #0f0f14;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --fg: #f5f5f7;
  --fg-muted: #a1a1aa;
  --fg-subtle: #52525b;
  --accent: #5eead4;
  --accent-glow: rgba(94, 234, 212, 0.4);
  --accent-2: #a78bfa;

  --font-display: 'Readex Pro', sans-serif;
  --font-sans: 'Readex Pro', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-arabic: 'IBM Plex Sans Arabic', sans-serif;
  --font-arabic-display: 'IBM Plex Sans Arabic', sans-serif;

  --max-width: 1100px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  letter-spacing: -0.01em;
}

body[lang="ar"] { font-family: var(--font-arabic); direction: rtl; }

/* ===== Background system ===== */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
  pointer-events: none;
}

.bg-spotlight {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  will-change: transform;
}

.bg-noise {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.3;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ===== Navigation ===== */
.nav {
  position: sticky;
  top: 1rem;
  z-index: 100;
  margin: 1rem auto 0;
  max-width: 760px;
  padding: 0 1rem;
}

.nav-inner {
  background: rgba(15, 15, 20, 0.6);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.5rem 0.7rem 0.5rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

body[lang="ar"] .nav-inner { padding: 0.5rem 1.25rem 0.5rem 0.7rem; }

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--fg);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo .mark {
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--bg);
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  gap: 0.15rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.85rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover { color: var(--fg); }
.nav-links a.active {
  color: var(--fg);
  background: var(--bg-glass);
}

.nav-controls { display: flex; gap: 0.4rem; }

.btn-control {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-control:hover {
  background: var(--bg-glass);
  border-color: var(--border-hover);
  color: var(--fg);
}

/* ===== Layout ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
  position: relative;
  z-index: 2;
}

section { margin-bottom: 7rem; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}

body[lang="ar"] h1 {
  font-family: var(--font-arabic-display);
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.1;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

body[lang="ar"] h2 { font-family: var(--font-arabic-display); font-weight: 600; }

h3 {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* ===== Hero ===== */
.hero {
  min-height: calc(100vh - 8rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 0;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
  margin-bottom: 2.5rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: fit-content;
}

body[lang="ar"] .hero-status {
  font-family: var(--font-arabic);
}

.hero-status .pulse {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  position: relative;
  box-shadow: 0 0 8px var(--accent);
}

.hero-status .pulse::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.3;
  animation: ping 2s ease-out infinite;
}

@keyframes ping {
  0% { transform: scale(0.5); opacity: 0.5; }
  100% { transform: scale(2.5); opacity: 0; }
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  
}

.hero-bio {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 580px;
  margin-bottom: 2.5rem;
  line-height: 1.65;
}

body[lang="ar"] .hero-bio { font-size: 1.1rem; }

.hero-bio strong { color: var(--fg); font-weight: 500; }

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 999px;
  transition: all 0.2s;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.btn-primary:hover {
  background: transparent;
  color: var(--fg);
}

.btn-ghost {
  color: var(--fg);
  border-color: var(--border-hover);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  border-color: var(--fg-muted);
  background: rgba(255,255,255,0.06);
}

.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(3px); }
body[lang="ar"] .btn:hover .arrow { transform: translateX(-3px); }

/* ===== Terminal command bar ===== */
.terminal {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  max-width: 580px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.terminal-header {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.terminal-dot:nth-child(1) { background: #ff5f57; }
.terminal-dot:nth-child(2) { background: #febc2e; }
.terminal-dot:nth-child(3) { background: #28c840; }

.terminal-title {
  font-size: 0.7rem;
  color: var(--fg-subtle);
  margin-left: auto;
  margin-right: auto;
}

.terminal-body {
  padding: 1rem 1.25rem;
  direction: ltr;
  text-align: left;
}

.terminal-line {
  margin-bottom: 0.4rem;
  color: var(--fg-muted);
}

.terminal-line:last-child { margin-bottom: 0; }

.terminal-prompt { color: var(--accent); }
.terminal-cmd { color: var(--fg); }
.terminal-out { color: var(--fg-subtle); padding-left: 0.5rem; }
.terminal-tag { color: var(--accent-2); }

.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 1.1em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1.2s ease-in-out infinite;
  margin-left: 4px;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ===== Section header ===== */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2.5rem;
  gap: 2rem;
  flex-wrap: wrap;
}

.section-header .meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-subtle);
}

/* ===== Page transitions ===== */
main, .footer {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

body.page-ready main,
body.page-ready .footer {
  opacity: 1;
  transform: translateY(0);
}

body.page-leaving main,
body.page-leaving .footer {
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

/* Nav stays put during transitions */
.nav {
  opacity: 1 !important;
  transform: none !important;
}

/* ===== Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s, transform 0.8s;
}

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

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding: 2.5rem 1.5rem;
  position: relative;
  z-index: 2;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-subtle);
}

body[lang="ar"] .footer p {
  font-family: var(--font-arabic);
}

.footer-socials { display: flex; gap: 1.25rem; }

.footer-socials a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s;
  position: relative;
}

.footer-socials a::after {
  content: '↗';
  margin-left: 3px;
  opacity: 0.5;
}

.footer-socials a:hover { color: var(--accent); }

/* ===== Mobile ===== */
@media (max-width: 720px) {
  .nav { margin-top: 0.5rem; }
  .nav-inner { padding: 0.4rem 0.6rem 0.4rem 1rem; }
  body[lang="ar"] .nav-inner { padding: 0.4rem 1rem 0.4rem 0.6rem; }
  main { padding: 2rem 1.25rem; }
  .hero { min-height: auto; padding: 3rem 0; }
  .terminal { font-size: 0.75rem; }
  .bg-spotlight { width: 400px; height: 400px; }
  .nav-links {
  display: flex;
  gap: 0;
  font-size: 0.7rem;
  }
  .nav-links a { padding: 0.3rem 0.45rem; }
  .nav-logo { font-size: 0.75rem; }
  .nav-logo .mark { width: 18px; height: 18px; font-size: 0.6rem; }
  .btn-control { padding: 0.3rem 0.55rem; font-size: 0.65rem; }
}