:root {
  --bg: #0a0a0b;
  --bg-soft: #111113;
  --panel: #151517;
  --text: #f2f1ec;
  --muted: #98989f;
  --line: #2a2a2e;
  --accent: #c8ff33;
  --accent-ink: #0a0a0b;
  --max: 1240px;
  --sans: "Manrope", system-ui, sans-serif;
  --mono: "DM Mono", monospace;
}

[data-theme="light"] {
  --bg: #f1f0e9;
  --bg-soft: #e8e7df;
  --panel: #faf9f3;
  --text: #111113;
  --muted: #67676d;
  --line: #d0cfc7;
  --accent: #5b7200;
  --accent-ink: #fff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.25s, color 0.25s;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; z-index: 99; top: 1rem; left: 1rem; padding: 0.7rem 1rem;
  background: var(--accent); color: var(--accent-ink); transform: translateY(-150%);
}
.skip-link:focus { transform: none; }
.section-shell { width: min(var(--max), calc(100% - 3rem)); margin-inline: auto; }

.site-header {
  position: fixed; z-index: 20; top: 0; left: 0; right: 0; height: 80px;
  display: flex; align-items: center; justify-content: space-between; padding: 0 3vw;
  background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px); transition: border-color 0.2s;
}
.site-header.scrolled { border-color: var(--line); }
.brand { display: inline-flex; align-items: center; gap: 0.8rem; font-weight: 800; letter-spacing: -0.03em; }
.brand-mark {
  display: grid; place-items: center; width: 34px; aspect-ratio: 1; border: 1px solid var(--text);
  border-radius: 50%; font: 500 0.65rem var(--mono); letter-spacing: -0.08em;
}
.site-nav { display: flex; align-items: center; gap: clamp(1.2rem, 3vw, 2.8rem); }
.site-nav a { color: var(--muted); font: 500 0.75rem var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.site-nav a:hover { color: var(--text); }
.theme-toggle, .menu-toggle { border: 0; background: none; cursor: pointer; }
.theme-toggle {
  display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--line);
  border-radius: 50%; font-size: 1.2rem;
}
.menu-toggle { display: none; }

.hero {
  position: relative; min-height: 100vh; padding-top: 155px; padding-bottom: 50px;
  display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 3rem; align-items: center;
}
.hero-backdrop {
  position: absolute; inset: 80px 50% 0 auto; z-index: -2; width: 100vw;
  transform: translateX(50%);
  background-image:
    linear-gradient(90deg, color-mix(in srgb, var(--bg) 96%, transparent) 0%, color-mix(in srgb, var(--bg) 78%, transparent) 44%, color-mix(in srgb, var(--bg) 12%, transparent) 100%),
    linear-gradient(180deg, transparent 70%, var(--bg) 100%),
    url("hero-architecture.jpg");
  background-position: center, center, center;
  background-size: cover;
  opacity: 0.92;
  pointer-events: none;
}
[data-theme="dark"] .hero-backdrop { opacity: 0.2; filter: grayscale(0.25) brightness(0.58); }
.hero-grid {
  position: absolute; inset: 80px 50% 0 -50vw; z-index: -1; opacity: 0.16;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: linear-gradient(to bottom, black, transparent 90%);
}
.eyebrow { margin: 0 0 1.5rem; color: var(--muted); font: 500 0.72rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 0.6rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 14%, transparent); }
.hero h1, .section-heading h2, .about h2, .skills h2, .contact h2 { margin: 0; font-weight: 600; letter-spacing: -0.065em; line-height: 0.98; }
.hero h1 { max-width: 900px; font-size: clamp(3.7rem, 7.7vw, 7.8rem); }
.hero h1 span { color: var(--muted); }
.hero-intro { max-width: 700px; margin: 2rem 0 2.5rem; color: var(--muted); font-size: clamp(1rem, 1.3vw, 1.2rem); }
.hero-intro strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 1.3rem; min-height: 52px; padding: 0.8rem 1.25rem; border: 1px solid var(--line); font: 500 0.75rem var(--mono); text-transform: uppercase; letter-spacing: 0.05em; cursor: pointer; transition: transform 0.2s, background 0.2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.button-ghost { background: transparent; }

.hero-card {
  position: relative; min-height: 440px; overflow: hidden; padding: 2rem; border: 1px solid var(--line);
  background: var(--panel); display: flex; flex-direction: column; justify-content: space-between;
  backdrop-filter: blur(14px);
}
.hero-card::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 8%, transparent) 40%, color-mix(in srgb, var(--panel) 92%, transparent) 100%),
    url("mzulkamal-portrait.jpg") center 16% / cover no-repeat;
  opacity: 0.72;
  filter: saturate(0.84) contrast(1.02);
}
[data-theme="dark"] .hero-card::before { opacity: 0.44; filter: grayscale(0.08) brightness(0.72); }
.monogram { position: relative; z-index: 2; font-weight: 800; font-size: clamp(7rem, 14vw, 12rem); line-height: 0.8; letter-spacing: -0.13em; color: var(--accent); text-shadow: 0 2px 18px color-mix(in srgb, var(--panel) 60%, transparent); }
.hero-card-meta { position: relative; z-index: 2; }
.hero-card-meta p, .hero-card-meta span { color: var(--muted); font: 0.7rem var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.hero-card-meta strong { display: block; margin: 0.4rem 0 0.8rem; font-size: 1.3rem; line-height: 1.25; }
.orbit { position: absolute; border: 1px solid var(--line); border-radius: 50%; }
.orbit-one { width: 360px; height: 360px; right: -130px; top: 0; }
.orbit-two { width: 260px; height: 260px; right: -50px; top: 50px; border-color: var(--accent); opacity: 0.35; }
.hero-stats { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 1rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-stats div { display: flex; align-items: center; gap: 1.2rem; padding: 1.3rem 0; }
.hero-stats div + div { border-left: 1px solid var(--line); padding-left: 2rem; }
.hero-stats strong { font-size: 2rem; color: var(--accent); }
.hero-stats span { color: var(--muted); font: 0.72rem var(--mono); text-transform: uppercase; }

.marquee { overflow: hidden; padding: 1.2rem 0; background: var(--accent); color: var(--accent-ink); transform: rotate(-1deg) scale(1.02); }
.marquee-track { display: flex; width: max-content; align-items: center; gap: 2rem; font: 500 0.8rem var(--mono); letter-spacing: 0.1em; animation: marquee 25s linear infinite; }
@keyframes marquee { to { transform: translateX(-50%); } }

.about, .experience, .skills, .contact { padding-top: 150px; padding-bottom: 150px; }
.section-label { display: flex; align-items: center; gap: 0.8rem; color: var(--muted); font: 0.7rem var(--mono); text-transform: uppercase; letter-spacing: 0.1em; }
.section-label span { color: var(--accent); }
.about { display: grid; grid-template-columns: 0.3fr 1fr; }
.about h2, .section-heading h2, .skills h2, .contact h2 { font-size: clamp(2.8rem, 6vw, 5.8rem); }
.about h2 em, .contact h2 em { color: var(--accent); font-style: normal; }
.about-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 3rem; color: var(--muted); font-size: 1.05rem; }

.experience { border-top: 1px solid var(--line); }
.section-heading { margin: 2rem 0 5rem 30%; }
.timeline-item { display: grid; grid-template-columns: 0.3fr 40px 1fr; min-height: 230px; }
.timeline-date { padding-top: 0.4rem; color: var(--muted); font: 0.7rem var(--mono); letter-spacing: 0.08em; }
.timeline-marker { position: relative; display: flex; justify-content: center; }
.timeline-marker::after { content: ""; position: absolute; top: 16px; bottom: 0; width: 1px; background: var(--line); }
.timeline-marker span { position: relative; z-index: 2; width: 11px; height: 11px; margin-top: 6px; border: 2px solid var(--bg); border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.timeline-content { padding: 0 0 4rem 3rem; border-top: 1px solid var(--line); }
.company { margin: -0.6rem 0 1.5rem; width: fit-content; padding-right: 1rem; background: var(--bg); color: var(--accent); font: 500 0.68rem var(--mono); letter-spacing: 0.12em; }
.timeline-content h3 { margin: 0; font-size: clamp(1.4rem, 2.6vw, 2.3rem); letter-spacing: -0.04em; }
.timeline-content > p:not(.company) { max-width: 620px; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.3rem; }
.tags span { padding: 0.35rem 0.65rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font: 0.63rem var(--mono); text-transform: uppercase; }

.skills { border-top: 1px solid var(--line); }
.skills-layout { display: grid; grid-template-columns: 0.75fr 1fr; gap: 7vw; margin-top: 3rem; }
.skills-intro { position: sticky; top: 130px; align-self: start; }
.skills-intro > p:last-child { max-width: 470px; margin-top: 2rem; color: var(--muted); }
.skill-card { display: grid; grid-template-columns: 45px 1fr auto; gap: 1.2rem; padding: 2rem 0; border-top: 1px solid var(--line); }
.skill-card > span { color: var(--accent); font: 0.7rem var(--mono); }
.skill-card h3 { margin: 0 0 0.6rem; font-size: 1.4rem; }
.skill-card p { margin: 0; color: var(--muted); }
.skill-card b { color: var(--muted); font-weight: 400; transition: transform 0.2s, color 0.2s; }
.skill-card:hover b { transform: translate(3px, -3px); color: var(--accent); }
.learning { margin-top: 8rem; padding: 2rem; background: var(--panel); }
.learning-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 2rem; background: var(--line); }
.learning-grid div { min-height: 190px; padding: 1.5rem; background: var(--panel); display: flex; flex-direction: column; }
.learning-grid span, .learning-grid small { color: var(--muted); font: 0.66rem var(--mono); text-transform: uppercase; }
.learning-grid strong { margin: auto 0 1.5rem; font-size: 1.05rem; }

.contact { border-top: 1px solid var(--line); display: grid; grid-template-columns: 0.8fr 1fr; gap: 8vw; }
.contact-copy .eyebrow { margin-top: 4rem; }
.contact-copy > p:not(.eyebrow) { max-width: 480px; color: var(--muted); }
.linkedin-link { display: inline-flex; gap: 1rem; margin-top: 1rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--text); font: 0.76rem var(--mono); text-transform: uppercase; }
.contact-form { align-self: end; padding: 2rem; border: 1px solid var(--line); background: var(--panel); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.contact-form label { display: block; color: var(--muted); font: 0.68rem var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.contact-form input, .contact-form textarea { width: 100%; margin: 0.5rem 0 1.3rem; padding: 0.8rem 0; border: 0; border-bottom: 1px solid var(--line); outline: 0; background: transparent; color: var(--text); resize: vertical; border-radius: 0; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--accent); }
.form-footer { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.form-status { margin: 0; color: var(--muted); font-size: 0.75rem; }

.site-footer { min-height: 120px; padding-top: 2rem; padding-bottom: 2rem; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 2rem; color: var(--muted); font: 0.68rem var(--mono); text-transform: uppercase; }
.site-footer .brand { color: var(--text); font-family: var(--sans); font-size: 1rem; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  .site-header { padding-inline: 1.5rem; }
  .menu-toggle { display: grid; gap: 6px; padding: 0.5rem; }
  .menu-toggle span:not(.sr-only) { display: block; width: 24px; height: 1px; background: var(--text); }
  .site-nav {
    position: absolute; top: 80px; left: 0; right: 0; display: none; padding: 2rem;
    align-items: flex-start; flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  .hero { grid-template-columns: 1fr; padding-top: 130px; }
  .hero-card { min-height: 340px; }
  .hero-stats { grid-template-columns: 1fr; }
  .hero-stats div + div { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .about, .contact { grid-template-columns: 1fr; gap: 3rem; }
  .about-content { margin-top: 2rem; }
  .skills-layout { grid-template-columns: 1fr; }
  .skills-intro { position: static; }
  .learning-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .section-shell { width: min(var(--max), calc(100% - 2rem)); }
  .hero h1 { font-size: clamp(3rem, 15vw, 4.6rem); }
  .hero-card { min-height: 300px; }
  .about, .experience, .skills, .contact { padding-top: 100px; padding-bottom: 100px; }
  .about-columns, .field-row { grid-template-columns: 1fr; gap: 0; }
  .section-heading { margin-left: 0; }
  .timeline-item { grid-template-columns: 90px 24px 1fr; }
  .timeline-content { padding-left: 1rem; }
  .timeline-date { font-size: 0.59rem; }
  .contact-form { padding: 1.2rem; }
  .form-footer { align-items: stretch; flex-direction: column; }
  .site-footer { align-items: flex-start; flex-direction: column; }
}