:root {
  --bg: #0a0f1c;
  --bg-alt: #0d1426;
  --surface: #121b30;
  --surface-2: #17223c;
  --border: #223052;
  --text: #e8edf7;
  --text-dim: #93a1c2;
  --text-faint: #5f6d8f;
  --accent: #2dd4bf;
  --accent-2: #60a5fa;
  --accent-warm: #fbbf24;
  --radius: 14px;
  --max-width: 1240px;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-head: 'Sora', 'Inter', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 { font-family: var(--font-head); font-weight: 700; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

/* progress bar */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  padding: 18px 0;
  transition: background 0.3s ease, padding 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(10, 15, 28, 0.85);
  backdrop-filter: blur(10px);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--font-head); font-size: 1.3rem; font-weight: 800; letter-spacing: -0.02em; }
.logo-dot { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 0.92rem; color: var(--text-dim); font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 999px;
  color: var(--text) !important;
}
.nav-cta:hover { border-color: var(--accent); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; }

/* hero */
.hero {
  position: relative;
  min-height: 82vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 116px 0 56px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(45, 212, 191, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 40%, transparent 90%);
}
#heroChart { position: absolute; bottom: 0; left: 0; width: 100%; height: 45%; opacity: 0.35; }
.hero-content { position: relative; z-index: 1; width: 100%; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 48px;
  align-items: center;
}
/* grid items default to min-width:auto and refuse to shrink below their
   content width, which pushes the hero past the viewport on narrow screens */
.hero-main, .hero-visual { min-width: 0; }

/* hero profile card */
.hero-card {
  background: rgba(18, 27, 48, 0.72);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.hero-card-top { display: flex; align-items: center; gap: 14px; }
.hero-avatar {
  position: relative;
  flex-shrink: 0;
  width: 58px; height: 58px;
  border-radius: 50%;
  overflow: hidden;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-avatar img { width: 100%; height: 100%; object-fit: cover; position: relative; z-index: 1; }
.hero-avatar.no-photo img { display: none; }
.hero-avatar-initials {
  position: absolute;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.15rem;
  color: #04121c;
  letter-spacing: 0.02em;
}
.hero-card-id { min-width: 0; }
.hero-card-name { font-family: var(--font-head); font-weight: 700; font-size: 1rem; }
.hero-card-title { font-size: 0.78rem; color: var(--accent-2); font-weight: 600; margin-top: 2px; line-height: 1.3; }
.hero-card-org { font-size: 0.74rem; color: var(--text-faint); margin-top: 2px; }

.hero-card-chartwrap {
  position: relative;
  height: 104px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 10px 8px;
}
.hero-card-chartlabel {
  position: absolute;
  top: 7px; left: 11px;
  font-size: 0.62rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.hero-card-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.hero-card-tags span {
  font-size: 0.7rem;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
}
.eyebrow {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.hero h1 {
  font-size: clamp(2.1rem, 3.6vw, 3.1rem);
  letter-spacing: -0.03em;
  line-height: 1.08;
}
.hero-role {
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  color: var(--accent-2);
  font-weight: 600;
  margin-top: 8px;
}
.hero-summary {
  max-width: 580px;
  color: var(--text-dim);
  font-size: 1rem;
  margin-top: 16px;
}
.hero-badge {
  display: inline-block;
  margin-top: 18px;
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(45, 212, 191, 0.06);
}
.hero-actions { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #04121c; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -8px rgba(45, 212, 191, 0.5); }
.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 22px;
  margin-top: 40px;
  max-width: 680px;
}
.stat { display: flex; flex-wrap: wrap; align-items: baseline; }
.stat-num { font-family: var(--font-head); font-size: 1.75rem; font-weight: 800; color: var(--text); }
.stat-suffix { font-family: var(--font-head); font-size: 1.2rem; font-weight: 800; color: var(--text); margin-left: 2px; }
.stat-label { flex-basis: 100%; font-size: 0.78rem; color: var(--text-faint); margin-top: 4px; line-height: 1.35; }

.scroll-cue {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid var(--border);
  border-radius: 20px;
  z-index: 1;
}
.scroll-cue span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  background: var(--accent);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scrollCue 1.8s infinite;
}
@keyframes scrollCue {
  0% { opacity: 1; top: 8px; }
  70% { opacity: 0; top: 20px; }
  100% { opacity: 0; top: 20px; }
}

/* sections */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-tag {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  letter-spacing: -0.02em;
  max-width: 720px;
  margin-bottom: 36px;
}
.section-note { color: var(--text-faint); font-size: 0.88rem; margin-top: -22px; margin-bottom: 32px; max-width: 620px; }

/* about */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
.about-text p { color: var(--text-dim); margin-bottom: 15px; font-size: 0.97rem; }
.about-text strong { color: var(--text); }
.about-highlights { display: grid; gap: 16px; }
.highlight-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.highlight-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.highlight-metric {
  display: block;
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.highlight-label { display: block; color: var(--text-faint); font-size: 0.85rem; margin-top: 6px; }

/* skills */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 20px; }
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.skill-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.skill-icon { font-size: 1.6rem; margin-bottom: 14px; }
.skill-card h3 { font-size: 1.02rem; margin-bottom: 14px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list li {
  font-size: 0.76rem;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 5px 11px;
  border-radius: 999px;
}

/* timeline */
.timeline { position: relative; padding-left: 32px; border-left: 1px solid var(--border); }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-marker {
  position: absolute;
  left: -37.5px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
}
.timeline-head { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 16px; }
.timeline-head h3 { font-size: 1.1rem; margin-bottom: 4px; }
.timeline-org { color: var(--accent-2); font-size: 0.9rem; font-weight: 600; }
.timeline-date {
  color: var(--text-faint);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  padding-top: 3px;
}
.timeline-card ul { display: flex; flex-direction: column; gap: 10px; }
.timeline-card li {
  color: var(--text-dim);
  font-size: 0.94rem;
  padding-left: 18px;
  position: relative;
}
.timeline-card li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.timeline-card strong { color: var(--text); }

/* services */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.service-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.service-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.service-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  background: var(--surface-2);
  border-radius: 12px;
}
.service-card h3 { font-size: 1.05rem; }
.service-card p { color: var(--text-dim); font-size: 0.88rem; flex-grow: 1; }
.service-cta {
  align-self: flex-start;
  margin-top: auto;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}
.service-cta:hover { color: var(--accent-2); }

/* work samples */
.work-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 24px; }
.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.work-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.work-card-head { margin-bottom: 16px; }
.work-card-head h3 { font-size: 1rem; margin-bottom: 6px; }
.work-tag { font-size: 0.72rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; }
.chart-wrap { height: 180px; margin-bottom: 16px; }
.work-desc { color: var(--text-dim); font-size: 0.88rem; }

.flow-wrap {
  min-height: 180px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 8px 0;
}
.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 8px;
  width: 100px;
}
.flow-icon { font-size: 1.3rem; }
.flow-label { font-size: 0.74rem; font-weight: 600; color: var(--text); line-height: 1.25; }
.flow-sub { font-size: 0.64rem; color: var(--text-faint); line-height: 1.25; }
.flow-arrow { color: var(--accent); font-size: 1.1rem; font-weight: 700; }

/* education */
.edu-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.edu-card h3 { font-size: 0.95rem; margin-bottom: 6px; }
.edu-card p { color: var(--text-faint); font-size: 0.85rem; }

/* contact */
.section-contact { text-align: center; }
.contact-inner { display: flex; flex-direction: column; align-items: center; }
.contact-inner .section-title { margin-left: auto; margin-right: auto; }
.contact-inner p { color: var(--text-dim); max-width: 480px; margin-bottom: 32px; }

.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  width: 100%;
  max-width: 760px;
  text-align: left;
}
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dim);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form input,
.contact-form select,
.contact-form textarea {
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.2s ease;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus { border-color: var(--accent); }
.contact-form textarea { resize: vertical; min-height: 90px; }
.contact-form .btn { align-self: flex-start; border: none; cursor: pointer; }
.form-status { font-size: 0.85rem; min-height: 1.2em; }
.form-status.success { color: var(--accent); }
.form-status.error { color: var(--accent-warm); }

.contact-alt {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding-top: 4px;
}
.contact-alt-label { color: var(--text-faint); font-size: 0.82rem; margin-bottom: 4px; }
.contact-alt .btn { width: 100%; justify-content: center; }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner { display: flex; justify-content: space-between; color: var(--text-faint); font-size: 0.82rem; }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { width: 100%; max-width: 420px; }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .services-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .work-grid { grid-template-columns: 1fr; }
  .edu-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .contact-grid { grid-template-columns: 1fr; max-width: 480px; }
  .contact-alt { align-items: stretch; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: 68%;
    max-width: 320px;
    background: var(--bg-alt);
    border-left: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 26px;
    padding: 40px;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 950;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-cta { margin-top: 8px; }
  .skills-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .timeline { padding-left: 24px; }
  .timeline-marker { left: -29.5px; }
  .timeline-card { padding: 22px; }
  .footer-inner { flex-direction: column; gap: 6px; text-align: center; }
}