:root {
  --bg: #09090b;
  --bg-alt: #0d0d10;
  --ink: #f5f5f4;
  --ink-soft: #a3a3a8;
  --line: rgba(255, 255, 255, 0.08);
  --card: rgba(255, 255, 255, 0.04);
  --card-hover: rgba(255, 255, 255, 0.07);
  --accent: #5b8cff;
  --accent-2: #8ee8ff;
  --max: 1120px;
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 14px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9, 9, 11, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.logo span {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav {
  display: flex;
  gap: 32px;
  font-size: 0.92rem;
  margin-right: auto;
  margin-left: 48px;
}

.nav a {
  color: var(--ink-soft);
  transition: color 0.15s ease;
}

.nav a:hover { color: var(--ink); }

.header-actions { display: flex; align-items: center; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  display: block;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.18s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06101f;
  font-weight: 600;
}

.btn-primary:hover {
  box-shadow: 0 8px 24px rgba(91, 140, 255, 0.35);
  transform: translateY(-1px);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.3); background: rgba(255, 255, 255, 0.05); }

.btn-small { padding: 10px 20px; font-size: 0.85rem; }
.btn-large { padding: 16px 34px; font-size: 1.02rem; }

/* Hero */
.hero {
  position: relative;
  padding: 96px 0 0;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -220px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(91, 140, 255, 0.32), rgba(142, 232, 255, 0.12) 45%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  padding-bottom: 64px;
}

.hero-copy { position: relative; z-index: 1; max-width: 560px; }

.hero h1 {
  font-size: clamp(2.4rem, 4.8vw, 3.6rem);
  margin-bottom: 20px;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 1.06rem;
  color: var(--ink-soft);
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-card {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px;
  display: grid;
  gap: 24px;
  backdrop-filter: blur(10px);
}

.hero-stat {
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.hero-stat:last-child { border-bottom: none; padding-bottom: 0; }

.hero-stat span {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--ink);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 4px;
}

/* Tag ticker */
.tag-ticker {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
}

.tag-track {
  display: flex;
  gap: 48px;
  padding: 18px 24px;
  white-space: nowrap;
  animation: scroll-tags 22s linear infinite;
  width: max-content;
}

.tag-track span {
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

@keyframes scroll-tags {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Sections */
.section {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}

.section-alt { background: var(--bg-alt); }

.section-head { max-width: 680px; margin-bottom: 48px; }

.section-head h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
}

.section-sub {
  color: var(--ink-soft);
  margin-top: 12px;
}

.resume-sub {
  font-size: 1.05rem;
  margin-bottom: 20px;
}

/* Feature grid (About) */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
  background: var(--card-hover);
  transform: translateY(-3px);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(91, 140, 255, 0.2), rgba(142, 232, 255, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin: 0;
}

/* Timeline */
.timeline-item {
  padding: 0 0 36px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}

.timeline-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.timeline-date {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.timeline-item h3 { font-size: 1.3rem; margin-bottom: 4px; }

.timeline-role {
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
  margin-bottom: 18px;
}

.timeline-sub {
  display: grid;
  gap: 20px;
  margin-top: 8px;
  padding-left: 20px;
  border-left: 2px solid var(--line);
}

.timeline-sub-item h4 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.timeline-sub-item h4 span {
  display: block;
  font-weight: 400;
  color: var(--ink-soft);
  font-size: 0.85rem;
  margin-top: 2px;
}

.timeline-sub-item p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin: 0;
}

/* Projects */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
  background: var(--card-hover);
  transform: translateY(-3px);
}

.project-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(91, 140, 255, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.project-card h3 { font-size: 1.1rem; margin-bottom: 8px; }

.project-card p { color: var(--ink-soft); font-size: 0.92rem; margin: 0; }

/* Education */
.education-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
}

.cert-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.cert-list li {
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding-left: 22px;
  position: relative;
}

.cert-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.badge-grid {
  display: grid;
  gap: 16px;
}

.badge-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge-card .feature-icon { margin: 0; flex-shrink: 0; }

.badge-card h4 { font-size: 0.98rem; font-weight: 600; margin: 0; }

/* Skills */
.skills-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-cloud span {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--ink);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
}

.contact-form {
  display: grid;
  gap: 18px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-weight: 500;
}

.contact-form input,
.contact-form textarea {
  font: inherit;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.contact-form button { justify-self: start; border: none; cursor: pointer; }

.form-note {
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin: 0;
}

.contact-info p {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
}

.contact-info span {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.socials {
  display: flex;
  gap: 18px;
  margin-top: 4px;
}

.socials a { color: var(--ink-soft); font-size: 0.9rem; }
.socials a:hover { color: var(--ink); }

/* CTA band */
.cta-band {
  position: relative;
  padding: 100px 0;
  text-align: center;
  overflow: hidden;
  border-top: 1px solid var(--line);
}

.cta-glow {
  position: absolute;
  bottom: -260px;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(91, 140, 255, 0.28), rgba(142, 232, 255, 0.1) 45%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}

.cta-inner { position: relative; z-index: 1; }

.cta-band h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  max-width: 640px;
  margin: 0 auto 16px;
}

.cta-band p {
  color: var(--ink-soft);
  margin-bottom: 32px;
}

/* Footer */
.site-footer {
  padding: 32px 0 48px;
  color: var(--ink-soft);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-inner p { margin: 0; }

/* Responsive */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 400px; margin: 0 auto; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .project-grid { grid-template-columns: 1fr; }
  .education-grid, .contact-grid, .skills-cols { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--line);
    display: none;
    margin: 0;
  }
  .nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .header-actions { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero { padding: 72px 0 0; }
  .section { padding: 64px 0; }
  .cta-band { padding: 72px 0; }
}