/* =====================================================
   Saifullah Mousaad — Portfolio
   Aesthetic: Editorial dark · Serif headlines · Monospace accents
   ===================================================== */

/* ---------- Tokens ---------- */
:root {
  --bg:           #0a0a0a;
  --bg-2:         #111111;
  --bg-3:         #1a1a1a;
  --surface:      #161616;
  --surface-2:    #202020;
  --border:       #2a2a2a;
  --border-light: #333333;
  --text:         #e8e4dc;
  --text-muted:   #888880;
  --text-faint:   #444440;
  --accent:       #c8a96e;       /* warm gold — distinctive, not generic blue */
  --accent-dim:   #7a6340;
  --accent-glow:  rgba(200,169,110,0.12);
  --font-serif:   'DM Serif Display', Georgia, serif;
  --font-sans:    'Instrument Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;
  --radius:       4px;
  --radius-lg:    8px;
  --ease:         cubic-bezier(0.16, 1, 0.3, 1);
  --transition:   0.2s var(--ease);
}

[data-theme="light"] {
  --bg:           #f7f4ee;
  --bg-2:         #f0ece3;
  --bg-3:         #e8e3d8;
  --surface:      #ffffff;
  --surface-2:    #f2ede4;
  --border:       #ddd9cf;
  --border-light: #ccc8be;
  --text:         #1a1814;
  --text-muted:   #6b6760;
  --text-faint:   #b0aca4;
  --accent:       #a07c3a;
  --accent-dim:   #c9a870;
  --accent-glow:  rgba(160,124,58,0.1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}
a:hover, a:focus-visible { opacity: 0.75; }

ul { list-style: none; }
img { max-width: 100%; display: block; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* ---------- Utility ---------- */
.mono { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.04em; }

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--accent);
  color: var(--bg);
  padding: 0.5rem 1rem;
  border-radius: 0 0 var(--radius) var(--radius);
  z-index: 9999;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

[data-theme="light"] .navbar {
  background: rgba(247,244,238,0.88);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav-logo:hover { color: var(--accent); opacity: 1; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
}

.nav-links a {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-glow);
  opacity: 1;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius);
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: border-color var(--transition), color var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- Layout ---------- */
main { padding-top: 60px; }

section { padding: 7rem 2rem; }

.section-container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.section-num { color: var(--accent); }
.section-label { color: var(--text-muted); }

.section-rule {
  flex: 0 0 40px;
  height: 1px;
  background: var(--border-light);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 3rem;
  line-height: 1.15;
}

/* ---------- Hero ---------- */
#hero {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  padding: 5rem 2rem;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.hero-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  color: var(--accent);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.hero-eyebrow::after {
  content: '';
  display: block;
  width: 60px;
  height: 1px;
  background: var(--accent-dim);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 2rem;
}

.hero-title em {
  color: var(--accent);
  font-style: italic;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none !important;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
  opacity: 1;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border-light);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  opacity: 1;
}

.hero-scroll-hint {
  color: var(--text-faint);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.hero-bg-text {
  position: absolute;
  right: -0.05em;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-serif);
  font-size: clamp(10rem, 22vw, 18rem);
  font-weight: 400;
  color: transparent;
  -webkit-text-stroke: 1px var(--border);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}

/* ---------- About ---------- */
#about { background: var(--bg-2); }

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 5rem;
  align-items: start;
  margin-bottom: 3rem;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.0rem;
  line-height: 1.8;
  max-width: 52ch;
}
.about-text p:last-child { margin-bottom: 0; }

.about-facts {
  border-top: 1px solid var(--border);
}

.about-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.fact-key {
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact-val {
  color: var(--text);
  font-size: 0.9rem;
}

.currently-block {
  padding: 1.5rem 2rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  background: var(--surface);
}

.currently-label {
  color: var(--accent);
  flex-shrink: 0;
  padding-top: 0.1rem;
}

.currently-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.currently-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 1rem;
}

.currently-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ---------- Skills ---------- */
#skills { background: var(--bg); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skill-group {
  padding: 2rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.skill-group:last-child { border-right: none; }

.skill-group-title {
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.skill-tag.learning {
  border-style: dashed;
  color: var(--text-faint);
}

/* ---------- Projects ---------- */
#projects { background: var(--bg-2); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.project-card {
  background: var(--bg-2);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background var(--transition);
}
.project-card:hover { background: var(--surface-2); }

.project-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.project-num {
  color: var(--text-faint);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.project-link {
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  transition: color var(--transition);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
}
.project-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
  opacity: 1;
}

.project-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.75;
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.project-tags li {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ---------- Contact ---------- */
#contact { background: var(--bg); }

.contact-intro {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 44ch;
  line-height: 1.75;
  margin-bottom: 3rem;
  margin-top: -1.5rem;
}

.contact-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  text-decoration: none !important;
  transition: background var(--transition);
  position: relative;
}
.contact-card:last-child { border-bottom: none; }
.contact-card:hover { background: var(--surface-2); opacity: 1; }

.contact-type {
  color: var(--accent);
  min-width: 70px;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-value {
  font-size: 0.95rem;
  color: var(--text-muted);
  flex: 1;
}

.contact-arrow {
  color: var(--text-faint);
  font-size: 1rem;
  transition: color var(--transition), transform var(--transition);
}
.contact-card:hover .contact-arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

/* ---------- Footer ---------- */
footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 2rem;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-faint);
  font-size: 0.78rem;
}

.footer-container a {
  color: var(--text-faint);
  transition: color var(--transition);
}
.footer-container a:hover { color: var(--accent); opacity: 1; }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  section { padding: 5rem 1.25rem; }

  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0; right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
    gap: 0.25rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 0.65rem 0.75rem; }

  .hero-bg-text { display: none; }

  .about-grid { grid-template-columns: 1fr; gap: 3rem; }

  .currently-block { flex-direction: column; gap: 1rem; }

  .skills-grid { grid-template-columns: 1fr 1fr; }
  .skill-group { border-right: none; }

  .contact-card { gap: 1rem; padding: 1.25rem 1.5rem; }
  .contact-type { min-width: 55px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 3rem; }
  .hero-cta { flex-direction: column; }
  .btn { justify-content: center; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-value { font-size: 0.82rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}