/* ===========================================================
   Khaled Altellawi — Portfolio
   Balanced cyberpunk: dark base, restrained neon accents
   =========================================================== */

:root {
  --bg:        #070a10;
  --bg-2:      #0c111a;
  --panel:     #0e1420;
  --panel-2:   #111a28;
  --line:      #1c2740;
  --text:      #e6edf6;
  --text-dim:  #8da2bd;
  --text-mute: #5a6b85;

  --cyan:      #00e5ff;
  --magenta:   #ff2e97;
  --violet:    #8a6bff;

  --glow-cyan: rgba(0, 229, 255, 0.35);
  --glow-mag:  rgba(255, 46, 151, 0.30);

  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;

  --radius: 14px;
  --maxw: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Background layers ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.18;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 10%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 10%, transparent 75%);
}
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(600px circle at 15% 10%, var(--glow-cyan), transparent 45%),
    radial-gradient(600px circle at 90% 30%, var(--glow-mag), transparent 45%);
  opacity: 0.5;
  pointer-events: none;
}

/* ---------- Layout helpers ---------- */
main { display: block; }
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 90px 24px;
}
.section__head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 44px;
}
.section__index {
  font-family: var(--mono);
  color: var(--cyan);
  font-size: 0.85rem;
  letter-spacing: 2px;
}
.section__title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 600;
  letter-spacing: 0.5px;
}
.section__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--maxw);
  margin: 0 auto;
  backdrop-filter: blur(10px);
  background: rgba(7, 10, 16, 0.6);
  border-bottom: 1px solid var(--line);
}
.nav__brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 1px;
}
.nav__brack { color: var(--cyan); }
.nav__links {
  display: flex;
  gap: 28px;
}
.nav__links a {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.2s, text-shadow 0.2s;
}
.nav__links a:hover {
  color: var(--cyan);
  text-shadow: 0 0 12px var(--glow-cyan);
}
.nav__actions { display: flex; align-items: center; gap: 14px; }

.lang-toggle {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
  letter-spacing: 1px;
  transition: border-color 0.2s;
}
.lang-toggle:hover { border-color: var(--cyan); }
.lang-toggle__opt {
  font-family: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  background: none;
  border: none;
  padding: 1px 3px;
  cursor: pointer;
  color: var(--text-mute);
  transition: color 0.2s, text-shadow 0.2s;
}
.lang-toggle__opt:hover { color: var(--text); }
.lang-toggle__opt.is-active { color: var(--cyan); text-shadow: 0 0 10px var(--glow-cyan); }
.lang-toggle__sep { margin: 0 1px; color: var(--text-mute); }

/* ---------- RTL (Arabic) ---------- */
[dir="rtl"] body { font-family: 'Cairo', var(--sans); }
[dir="rtl"] .nav__brand,
[dir="rtl"] .stat__num,
[dir="rtl"] .glitch,
[dir="rtl"] .lang-toggle { font-family: var(--mono); }
[dir="rtl"] .hero__role::before { content: ""; }
[dir="rtl"] .section__line { background: linear-gradient(270deg, var(--line), transparent); }
[dir="rtl"] .about__v { text-align: left; }
[dir="rtl"] .bg-glow {
  background:
    radial-gradient(600px circle at 85% 10%, var(--glow-cyan), transparent 45%),
    radial-gradient(600px circle at 10% 30%, var(--glow-mag), transparent 45%);
}
[dir="rtl"] .timeline { padding-left: 0; padding-right: 8px; }
[dir="rtl"] .tl {
  border-left: none;
  border-right: 1px solid var(--line);
  padding: 0 34px 38px 0;
}
[dir="rtl"] .tl:last-child { border-right-color: transparent; }
[dir="rtl"] .tl__dot { left: auto; right: -7px; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  width: 24px; height: 2px;
  background: var(--text);
  transition: 0.3s;
}
.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 110px 24px 70px;
  min-height: 86vh;
  display: flex;
  align-items: center;
}
.hero__inner { max-width: 760px; }
.hero__kicker {
  font-family: var(--mono);
  color: var(--cyan);
  font-size: 0.9rem;
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.hero__name {
  font-size: clamp(2.6rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -1px;
  margin-bottom: 18px;
}
.hero__role {
  font-size: clamp(1.1rem, 2.6vw, 1.7rem);
  font-weight: 500;
  color: var(--text);
  margin-bottom: 22px;
}
.hero__role::before { content: "> "; color: var(--magenta); font-family: var(--mono); }
.hero__tag {
  color: var(--text-dim);
  font-size: 1.02rem;
  max-width: 620px;
  margin-bottom: 36px;
}
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }

.hero__stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.stat { display: flex; flex-direction: column; }
.stat__num {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 18px var(--glow-cyan);
}
.stat__label { font-size: 0.82rem; color: var(--text-mute); }

/* ---------- Glitch ---------- */
.glitch {
  position: relative;
  display: inline-block;
  color: var(--text);
}
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0; top: 0;
  width: 100%;
  overflow: hidden;
  clip-path: inset(0 0 0 0);
}
.glitch::before { color: var(--cyan); transform: translate(-2px, 0); opacity: 0.7; animation: glitchTop 4s infinite linear alternate; }
.glitch::after  { color: var(--magenta); transform: translate(2px, 0);  opacity: 0.7; animation: glitchBot 4.5s infinite linear alternate; }
@keyframes glitchTop {
  0%,92%,100% { clip-path: inset(0 0 100% 0); transform: translate(-2px,0); }
  93% { clip-path: inset(0 0 55% 0); transform: translate(-4px,-1px); }
  96% { clip-path: inset(0 0 40% 0); transform: translate(2px,1px); }
}
@keyframes glitchBot {
  0%,90%,100% { clip-path: inset(100% 0 0 0); transform: translate(2px,0); }
  91% { clip-path: inset(60% 0 0 0); transform: translate(4px,1px); }
  95% { clip-path: inset(45% 0 0 0); transform: translate(-2px,-1px); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.88rem;
  letter-spacing: 0.5px;
  padding: 13px 26px;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.25s, background 0.25s;
  border: 1px solid transparent;
}
.btn--primary {
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  color: #04121a;
  font-weight: 700;
  box-shadow: 0 0 0 transparent;
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px var(--glow-cyan);
}
.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn--ghost:hover {
  border-color: var(--magenta);
  color: var(--magenta);
  box-shadow: 0 8px 26px var(--glow-mag);
  transform: translateY(-2px);
}

.btn--secondary {
  background: linear-gradient(135deg, var(--magenta), var(--violet));
  color: #1a0410;
  font-weight: 700;
}
.btn--secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px var(--glow-mag);
}

/* ---------- About ---------- */
.about {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 40px;
}
.about__text p { color: var(--text-dim); margin-bottom: 18px; }
.about__facts {
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 8px 20px;
  height: fit-content;
}
.about__facts li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.about__facts li:last-child { border-bottom: none; }
.about__k { font-family: var(--mono); font-size: 0.78rem; color: var(--text-mute); }
.about__v { font-size: 0.88rem; color: var(--text); text-align: right; }

/* ---------- Skills ---------- */
.skills {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.skill-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.25s, transform 0.25s;
}
.skill-card:hover { border-color: var(--cyan); transform: translateY(-3px); }
.skill-card__h {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--cyan);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.skill-card__h::before { content: "# "; color: var(--text-mute); }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 9px; }
.tags li {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text-dim);
  background: var(--bg-2);
  transition: color 0.2s, border-color 0.2s;
}
.skill-card:hover .tags li { border-color: rgba(0,229,255,0.25); }
.tags--sm li { font-size: 0.72rem; padding: 4px 9px; }

/* ---------- Timeline ---------- */
.timeline {
  list-style: none;
  position: relative;
  padding-left: 8px;
}
.tl {
  position: relative;
  padding: 0 0 38px 34px;
  border-left: 1px solid var(--line);
}
.tl:last-child { border-left-color: transparent; padding-bottom: 0; }
.tl__dot {
  position: absolute;
  left: -7px; top: 4px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px var(--glow-cyan);
}
.tl__date {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--magenta);
  letter-spacing: 0.5px;
}
.tl__role { font-size: 1.15rem; font-weight: 600; margin-top: 4px; }
.tl__org {
  display: block;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-mute);
  margin-bottom: 12px;
}
.tl__desc { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 14px; max-width: 720px; }

/* ---------- Projects ---------- */
.projects {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.proj {
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.proj::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.proj:hover {
  border-color: rgba(0,229,255,0.4);
  transform: translateY(-4px);
  box-shadow: 0 14px 40px rgba(0,0,0,0.5);
}
.proj:hover::after { transform: scaleX(1); }
.proj__top { margin-bottom: 14px; }
.proj__tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--cyan);
  border: 1px solid rgba(0,229,255,0.3);
  padding: 4px 10px;
  border-radius: 999px;
}
.proj__name { font-size: 1.25rem; font-weight: 600; margin-bottom: 12px; }
.proj__desc { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 18px; }

/* ---------- Contact ---------- */
.section--contact { text-align: center; padding-bottom: 110px; }
.contact { max-width: 600px; margin: 0 auto; }
.contact__h {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 16px;
}
.contact__p { color: var(--text-dim); margin-bottom: 30px; }
.contact__btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 28px 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-mute);
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .about { grid-template-columns: 1fr; }
  .skills, .projects { grid-template-columns: 1fr; }

  .nav__links {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    padding: 10px 0;
    transform: translateY(-130%);
    transition: transform 0.32s ease;
    z-index: 40;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__links a { padding: 16px 24px; border-bottom: 1px solid var(--line); }
  .nav__burger { display: flex; }
  .hero { min-height: auto; padding-top: 70px; }
  .hero__stats { gap: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  .glitch::before, .glitch::after { animation: none; display: none; }
  .reveal { transition: none; opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}