/* ============ Theme variables ============ */
:root {
  --font-display: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
  --radius: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0a0e1f;
  --bg-alt: #0e1330;
  --surface: #141a3a;
  --surface-2: #1a2148;
  --text: #e8eaf6;
  --text-muted: #9aa3c7;
  --accent: #f2a93b;
  --accent-soft: rgba(242, 169, 59, 0.14);
  --border: rgba(154, 163, 199, 0.18);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --glow: radial-gradient(circle, rgba(242, 169, 59, 0.16) 0%, transparent 65%);
}

[data-theme="light"] {
  --bg: #faf7f1;
  --bg-alt: #f1ecdf;
  --surface: #ffffff;
  --surface-2: #fdfaf4;
  --text: #1c2240;
  --text-muted: #5a6285;
  --accent: #c97f10;
  --accent-soft: rgba(201, 127, 16, 0.12);
  --border: rgba(28, 34, 64, 0.12);
  --shadow: 0 16px 40px rgba(28, 34, 64, 0.10);
  --glow: radial-gradient(circle, rgba(201, 127, 16, 0.10) 0%, transparent 65%);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.25; }

.container {
  width: min(1120px, 92%);
  margin-inline: auto;
}

.accent { color: var(--accent); }

/* ============ Nav ============ */
.nav {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav-inner {
  width: min(1120px, 92%);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}
.nav-logo .dot { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 1.8rem;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  transition: color var(--transition);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 0.8rem; }

.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}
.theme-toggle:hover { transform: rotate(20deg) scale(1.06); border-color: var(--accent); }
.theme-toggle svg { width: 20px; height: 20px; }

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

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-burger span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding-top: 90px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  width: 900px;
  height: 900px;
  top: -250px;
  right: -250px;
  background: var(--glow);
  pointer-events: none;
  animation: drift 14s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-70px, 60px) scale(1.12); }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 3rem;
}

.hero-kicker {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}

.hero-name {
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.hero-role {
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 1.1rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.4rem;
}

.hero-tags span {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}

.hero-summary {
  max-width: 56ch;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2rem; }

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.9rem;
  border-radius: 999px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #15182e;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 40%, transparent);
}

.btn-ghost {
  border: 1.5px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

.btn-lg { font-size: 1.1rem; padding: 1rem 2.4rem; }

.hero-socials { display: flex; gap: 1rem; }

.hero-socials a {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.hero-socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-4px);
}
.hero-socials svg { width: 19px; height: 19px; }

.hero-photo { justify-self: center; }

.photo-frame {
  position: relative;
  width: min(360px, 80vw);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transform: rotate(2deg);
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.photo-frame:hover { transform: rotate(0deg) scale(1.02); }

.photo-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-radius: 24px;
  z-index: 1;
  pointer-events: none;
}

.photo-frame img { aspect-ratio: 3 / 4; object-fit: cover; }

.scroll-hint {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: bob 2.2s ease-in-out infinite;
}
.scroll-hint svg { width: 26px; height: 26px; }

@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ============ Sections ============ */
.section { padding-block: 6.5rem; }

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

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 3rem;
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
}

.section-num {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.1em;
}

/* ============ About ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p { margin-bottom: 1.2rem; color: var(--text-muted); font-size: 1.05rem; }
.about-text strong { color: var(--text); }

.about-facts { display: grid; gap: 1.2rem; }

.fact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.fact-card:hover { transform: translateX(6px); border-color: var(--accent); }

.fact-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.fact-value::after { content: "+"; }
.fact-label { color: var(--text-muted); font-size: 0.92rem; }

/* ============ Timeline ============ */
.timeline {
  position: relative;
  padding-left: 2.2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}

.timeline-item {
  position: relative;
  margin-bottom: 2.4rem;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -2.2rem;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
  transition: background var(--transition);
}

.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem 2rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}
.timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-card h3 { font-size: 1.2rem; margin-top: 0.4rem; }

.timeline-company {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  margin-bottom: 0.8rem;
}

.timeline-card ul { padding-left: 1.1rem; color: var(--text-muted); font-size: 0.95rem; }
.timeline-card li { margin-bottom: 0.45rem; }
.timeline-card li::marker { color: var(--accent); }

/* ============ Projects ============ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.6rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.7rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--border));
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  min-height: 34px;
}

.project-tag {
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}

.project-link {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.project-link:hover { color: var(--accent); border-color: var(--accent); transform: translate(2px, -2px); }
.project-link svg { width: 16px; height: 16px; }

.project-card h3 { font-size: 1.12rem; margin-bottom: 0.6rem; }
.project-card p { color: var(--text-muted); font-size: 0.92rem; flex-grow: 1; }

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.1rem;
}
.project-stack span {
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}

/* ============ Skills ============ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.6rem;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.8rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.skill-group:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }

.skill-group h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.chips span {
  font-size: 0.84rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}
.chips span:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ============ Education ============ */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.edu-heading {
  font-size: 1.1rem;
  margin-bottom: 1.4rem;
  color: var(--accent);
}

.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.8rem;
  margin-bottom: 1.2rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.edu-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }

.edu-date {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.edu-card h4 { font-size: 1.05rem; margin-top: 0.3rem; }
.edu-card p { color: var(--text-muted); font-size: 0.92rem; }

.edu-note { color: var(--text-muted); font-size: 0.88rem; margin-top: 0.6rem; font-style: italic; }

.cert-list { list-style: none; }

.cert-list li {
  padding: 0.85rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 10px 10px 0;
  margin-bottom: 0.7rem;
  font-size: 0.93rem;
  color: var(--text-muted);
  transition: transform var(--transition), background var(--transition);
}
.cert-list li:hover { transform: translateX(5px); }
.cert-list strong { color: var(--text); font-weight: 600; }

/* ============ Contact ============ */
.section-contact { text-align: center; padding-block: 8rem; }

.contact-inner .section-title { justify-content: center; }

.contact-lead {
  max-width: 52ch;
  margin: 0 auto 2.2rem;
  color: var(--text-muted);
  font-size: 1.08rem;
}

.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 2.4rem;
}

.contact-links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  padding-bottom: 3px;
  transition: color var(--transition), border-color var(--transition);
}
.contact-links a:hover { color: var(--accent); border-color: var(--accent); }

/* ============ Footer ============ */
.footer {
  border-top: 1px solid var(--border);
  padding-block: 1.8rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* ============ Reveal animations ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

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

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-photo { order: -1; margin-top: 1rem; }
  .photo-frame { width: min(260px, 70vw); }
  .hero-tags, .hero-cta, .hero-socials { justify-content: center; }
  .hero-summary { margin-inline: auto; }
  .about-grid, .edu-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-burger { display: flex; }
  .nav-links {
    position: fixed;
    top: 61px;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    width: 220px;
    padding: 1rem 0;
    transform: translateX(100%);
    transition: transform var(--transition);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { padding: 0.8rem 1.6rem; }
  .nav-links a::after { display: none; }
  .section { padding-block: 4.5rem; }
}