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

:root {
  --bg:        #0f0f0f;
  --surface:   #1a1a1a;
  --border:    #2a2a2a;
  --text:      #e8e8e8;
  --muted:     #888;
  --accent:    #6ee7b7;
  --accent-dim:#1a3d30;
  --radius:    10px;
  --max-w:     1000px;
  --nav-h:     64px;
}

html[data-theme="light"] {
  --bg:        #f5f5f4;
  --surface:   #ffffff;
  --border:    #e2e2e0;
  --text:      #1a1a1a;
  --muted:     #6b7280;
  --accent:    #059669;
  --accent-dim:#d1fae5;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
}

/* ── Scrollbar ──────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ── Utility ────────────────────────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.accent    { color: var(--accent); }
section    { padding: 80px 0; }
section + section { border-top: 1px solid var(--border); }

h2.section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 40px;
}

/* ── Theme toggle ───────────────────────────────────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--muted);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
  transition: opacity .2s, transform .3s;
}

/* Show moon in dark mode, sun in light mode */
.icon-sun  { display: none; }
.icon-moon { display: block; }

html[data-theme="light"] .icon-sun  { display: block; }
html[data-theme="light"] .icon-moon { display: none; }

/* ── Nav ────────────────────────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -.02em;
  text-decoration: none;
  color: var(--text);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  transition: color .2s;
}

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

.btn-contact {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 7px 18px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: background .2s, color .2s;
  white-space: nowrap;
}

.btn-contact:hover {
  background: var(--accent);
  color: var(--bg);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 20px 24px;
  flex-direction: column;
  gap: 20px;
  z-index: 99;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  text-decoration: none;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}

/* ── Hero ───────────────────────────────────────────────────────────── */
#hero {
  padding-top: calc(var(--nav-h) + 80px);
  padding-bottom: 80px;
  display: flex;
  align-items: center;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
}

.avatar-wrap {
  flex-shrink: 0;
}

.avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.avatar svg {
  width: 64px;
  height: 64px;
  color: var(--accent);
}

.hero-text { flex: 1; }

.hero-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 12px;
  border-radius: 99px;
  margin-bottom: 16px;
}

.hero-name {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero-summary {
  color: var(--muted);
  max-width: 540px;
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 28px;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: opacity .2s;
}
.btn-primary:hover { opacity: .85; }

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: border-color .2s;
}
.btn-secondary:hover { border-color: var(--muted); }

/* ── Experience ─────────────────────────────────────────────────────── */
.timeline { display: flex; flex-direction: column; gap: 0; }

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
}

.timeline-item.visible { opacity: 1; transform: translateY(0); }
.timeline-item:last-child { border-bottom: none; }

.timeline-date {
  padding-top: 3px;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  line-height: 1.5;
}

.timeline-dot {
  display: none;
}

.timeline-body {}

.company-logo {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: contain;
  background: var(--surface);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.timeline-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.timeline-role {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.timeline-company {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
}

.timeline-desc {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 14px;
}

.metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.metric {
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
}

.achievements {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.achievements li {
  font-size: 13.5px;
  color: #b0b0b0;
  padding-left: 14px;
  position: relative;
}

.achievements li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ── Skills ─────────────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .45s ease, transform .45s ease;
}

.skill-group.visible { opacity: 1; transform: translateY(0); }

.skill-group-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  background: var(--border);
  color: var(--text);
  font-size: 12px;
  font-weight: 500;
  padding: 5px 11px;
  border-radius: 5px;
  transition: background .2s, color .2s;
}

.badge:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

/* ── Education ──────────────────────────────────────────────────────── */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .45s ease, transform .45s ease;
}

.edu-card.visible { opacity: 1; transform: translateY(0); }

.edu-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.edu-icon svg { width: 18px; height: 18px; color: var(--accent); }

.edu-degree {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.edu-school {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 4px;
}

.edu-year {
  font-size: 12px;
  color: var(--muted);
}

/* ── Certifications ─────────────────────────────────────────────────── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .45s ease, transform .45s ease, border-color .2s;
}

.cert-card:hover { border-color: var(--accent); }
.cert-card.visible { opacity: 1; transform: translateY(0); }

.cert-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.cert-icon svg { width: 18px; height: 18px; color: var(--accent); }

.cert-name {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.cert-issuer {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 4px;
}

.cert-meta {
  font-size: 12px;
  color: var(--muted);
}

/* ── Contact ────────────────────────────────────────────────────────── */
#contact {
  text-align: center;
}

.contact-inner {
  max-width: 480px;
  margin: 0 auto;
}

.contact-heading {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 14px;
}

.contact-sub {
  color: var(--muted);
  margin-bottom: 32px;
  font-size: 14px;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 28px;
  transition: border-color .2s;
}

.contact-email:hover { border-color: var(--accent); }

.social-links {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: 7px;
  border: 1px solid var(--border);
  transition: color .2s, border-color .2s;
}

.social-link svg { width: 16px; height: 16px; flex-shrink: 0; }
.social-link:hover { color: var(--text); border-color: var(--muted); }

/* ── Footer ─────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

/* ── Scroll indicator ───────────────────────────────────────────────── */
#progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  width: 0%;
  z-index: 200;
  transition: width .1s linear;
}

/* ── Projects page ──────────────────────────────────────────────────── */
.page-hero {
  padding-top: calc(var(--nav-h) + 64px);
  padding-bottom: 64px;
}

.page-hero-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.page-hero-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: 14px;
}

.page-hero-sub {
  color: var(--muted);
  font-size: 15px;
  max-width: 520px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-bottom: 80px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .45s ease, transform .45s ease, border-color .2s;
}

.project-card { cursor: pointer; }
.project-card:hover { border-color: var(--accent); }
.project-card.active { border-color: var(--accent); background: var(--accent-dim); }
.project-card.visible { opacity: 1; transform: translateY(0); }

.project-excerpt {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-more {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  margin-top: auto;
}

.project-detail-panel {
  display: none;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 28px 32px;
  margin-bottom: 80px;
  position: relative;
}

.project-detail-panel.open {
  display: block;
  animation: detailIn .25s ease;
}

@keyframes detailIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.detail-close {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color .2s, border-color .2s;
}

.detail-close:hover { color: var(--text); border-color: var(--muted); }

.detail-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -.01em;
  margin-bottom: 12px;
}

.detail-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 20px;
}

.project-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.project-company-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 3px 10px;
  border-radius: 99px;
  text-decoration: none;
  transition: opacity .2s;
}

.project-company-tag:hover { opacity: .75; }

.project-status {
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  background: var(--border);
  padding: 3px 9px;
  border-radius: 99px;
}

.project-status.live {
  color: var(--accent);
  background: var(--accent-dim);
}

.project-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.01em;
  line-height: 1.3;
}

.project-desc {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
  flex: 1;
}

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links, .nav-links + .btn-contact { display: none; }
  .hamburger { display: flex; }

  .hero-inner { flex-direction: column; gap: 28px; text-align: center; }
  .hero-summary { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }

  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .timeline-date { font-size: 11px; color: var(--accent); }

  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .edu-grid    { grid-template-columns: 1fr; }
  .cert-grid   { grid-template-columns: 1fr; }

  .projects-grid { grid-template-columns: 1fr; }
}