/* ── Variables ─────────────────────────────────────────────────────────── */
:root {
  --bg:         #0d1117;
  --bg2:        #111820;
  --bg3:        #151e28;
  --surface:    #1a2535;
  --surface2:   #1f2d3d;
  --border:     #243044;
  --border2:    #2e3d52;
  --accent:     #e8a838;
  --accent2:    #f0bc5a;
  --accent-dim: rgba(232,168,56,0.12);
  --accent-glow:rgba(232,168,56,0.06);
  --blue:       #4d9de0;
  --blue-dim:   rgba(77,157,224,0.1);
  --text:       #d4dde8;
  --text2:      #8a9ab0;
  --text3:      #5a6a7e;
  --white:      #f0f4f8;
  --mono:       'JetBrains Mono', monospace;
  --serif:      'DM Serif Display', Georgia, serif;
  --sans:       'Outfit', system-ui, sans-serif;
  --nav-h:      64px;
  --radius:     10px;
  --radius-lg:  18px;
  --trans:      0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.65;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Dot-grid background ─────────────────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

/* ── Typography ─────────────────────────────────────────────────────────── */
.mono { font-family: var(--mono); font-size: 0.78em; }
em { font-style: italic; }

/* ── Container ──────────────────────────────────────────────────────────── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

/* ── NAV ────────────────────────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background var(--trans), border-color var(--trans), box-shadow var(--trans);
}
#navbar.scrolled {
  background: rgba(13,17,23,0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}
.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  transition: opacity var(--trans);
}
.nav-logo:hover { opacity: 0.75; }
.nav-links {
  display: flex;
  gap: 0.25rem;
  margin-left: auto;
}
.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text2);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  transition: color var(--trans), background var(--trans);
  text-transform: uppercase;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); background: var(--accent-dim); }
.nav-resume {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  padding: 0.4rem 1rem;
  border-radius: 6px;
  flex-shrink: 0;
  transition: background var(--trans), transform var(--trans);
}
.nav-resume svg { width: 14px; height: 14px; flex-shrink: 0; }
.nav-resume:hover { background: var(--accent2); transform: translateY(-1px); }

/* ── Section base ────────────────────────────────────────────────────────── */
section {
  position: relative;
  z-index: 1;
  padding: 6rem 0;
}
section:nth-child(even) { background: var(--bg2); }
.section-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  opacity: 0.9;
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 2rem;
}
.section-title em { color: var(--accent); font-style: italic; }

/* ── Fade-in on scroll ───────────────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ── HERO ────────────────────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  top: -10%;
  left: -5%;
  width: 55%;
  height: 70%;
  background: radial-gradient(ellipse at 30% 40%, rgba(232,168,56,0.07) 0%, transparent 65%),
              radial-gradient(ellipse at 70% 60%, rgba(77,157,224,0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
  padding-top: var(--nav-h);
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.1s forwards;
}
.hero-name {
  font-family: var(--serif);
  font-size: clamp(3.5rem, 10vw, 7rem);
  line-height: 1.0;
  color: var(--white);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.25s forwards;
}
.hero-name em {
  color: var(--accent);
  font-style: italic;
  display: block;
}
.hero-tagline {
  font-size: 1.05rem;
  color: var(--text2);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.4s forwards;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s 0.55s forwards;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  transition: background var(--trans), transform var(--trans), box-shadow var(--trans);
}
.btn-primary:hover {
  background: var(--accent2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,168,56,0.25);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--text);
  font-weight: 500;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  transition: border-color var(--trans), color var(--trans), background var(--trans), transform var(--trans);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: fadeIn 1s 1.2s forwards;
}
.hero-scroll-hint span {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text3);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text3), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ── ABOUT ───────────────────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about-text p {
  color: var(--text2);
  margin-bottom: 1rem;
  font-size: 0.97rem;
  line-height: 1.8;
}
.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}
.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color var(--trans), opacity var(--trans);
}
.inline-link:hover { border-color: var(--accent); opacity: 0.8; }
.inline-link svg { flex-shrink: 0; }
.about-stats {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  transition: border-color var(--trans), transform var(--trans);
}
.stat-card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
}
.stat-number {
  font-family: var(--serif);
  font-size: 2.6rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.3rem;
}
.stat-label {
  font-size: 0.82rem;
  color: var(--text2);
  letter-spacing: 0.03em;
}

/* ── SKILLS ──────────────────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color var(--trans), transform var(--trans), box-shadow var(--trans);
}
.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 0 1px var(--accent-dim);
}
.skill-card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}
.skill-card-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text2);
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.2rem 0.55rem;
  transition: color var(--trans), border-color var(--trans);
}
.skill-card:hover .tag {
  color: var(--text);
  border-color: var(--border2);
}

/* ── EXPERIENCE ──────────────────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border), transparent);
}
.timeline-item {
  position: relative;
  margin-bottom: 3rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.375rem;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}
.timeline-role {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
}
.timeline-period {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.2rem 0.6rem;
  border-radius: 5px;
  white-space: nowrap;
}
.timeline-company {
  font-size: 0.9rem;
  color: var(--blue);
  margin-bottom: 1rem;
}
.timeline-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.timeline-bullets li {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.7;
  padding-left: 1.1rem;
  position: relative;
}
.timeline-bullets li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 1rem;
  line-height: 1.55;
}

/* ── PROJECTS ────────────────────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--trans), transform var(--trans), box-shadow var(--trans);
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}
.project-card-header {
  padding: 1.75rem 1.75rem 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}
.project-badge {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(232,168,56,0.2);
  padding: 0.2rem 0.6rem;
  border-radius: 5px;
  white-space: nowrap;
  flex-shrink: 0;
}
.project-card-icon {
  font-size: 2rem;
  line-height: 1;
}
.project-card-body {
  padding: 1rem 1.75rem 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.project-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.5rem;
}
.project-url {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text3);
  margin-bottom: 1rem;
  transition: color var(--trans);
}
.project-card:hover .project-url { color: var(--accent); }
.project-desc {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.75;
  margin-bottom: 1.25rem;
  flex: 1;
}
.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}
.project-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.45rem 1rem;
  border-radius: 7px;
  transition: all var(--trans);
}
.project-link.primary {
  background: var(--accent);
  color: var(--bg);
}
.project-link.primary:hover {
  background: var(--accent2);
  transform: translateY(-1px);
}
.project-link.secondary {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border2);
}
.project-link.secondary:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* ── EDUCATION ───────────────────────────────────────────────────────────── */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: border-color var(--trans), transform var(--trans);
}
.edu-card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
}
.edu-card.featured {
  grid-column: 1 / -1;
  border-color: var(--border2);
}
.edu-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.edu-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.2rem;
}
.edu-sub {
  font-size: 0.8rem;
  color: var(--text2);
}

/* ── CONTACT ─────────────────────────────────────────────────────────────── */
#contact {
  background: var(--bg2);
  text-align: center;
}
.contact-inner {
  max-width: 560px;
  margin: 0 auto;
}
.contact-inner .section-title {
  margin-bottom: 1rem;
}
.contact-inner p {
  color: var(--text2);
  margin-bottom: 2.5rem;
  font-size: 0.97rem;
}
.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 1rem 2rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
  transition: all var(--trans);
  margin-bottom: 2rem;
}
.contact-email:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(232,168,56,0.15);
}
.contact-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── FOOTER ──────────────────────────────────────────────────────────────── */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  position: relative;
  z-index: 1;
}
footer p {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text3);
  letter-spacing: 0.05em;
}

/* ── Back to top ─────────────────────────────────────────────────────────── */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--accent);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--trans), transform var(--trans), background var(--trans), box-shadow var(--trans);
  z-index: 99;
}
#back-to-top.visible {
  opacity: 1;
  transform: none;
}
#back-to-top:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(232,168,56,0.2);
}

/* ── Animations ──────────────────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: none; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 0.6; }
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 0.6; }
  50%       { transform: scaleY(1.2); opacity: 1; }
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .edu-grid { grid-template-columns: 1fr; }
  .edu-card.featured { grid-column: 1; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-stats { flex-direction: row; flex-wrap: wrap; }
  .stat-card { flex: 1; min-width: 120px; }
  section { padding: 4rem 0; }
}