/* ===== Theme variables ===== */
:root {
  --font-head: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, Roboto, sans-serif;

  --bg: #FAFAF9;
  --surface: #F1EFE8;
  --surface-2: #FFFFFF;
  --accent: #185FA5;
  --accent-2: #378ADD;
  --accent-soft: rgba(24, 95, 165, 0.12);
  --amber: #EF9F27;
  --text: #2C2C2A;
  --muted: #6b6b67;
  --border: rgba(44, 44, 42, 0.12);
  --shadow: 0 10px 30px rgba(44, 44, 42, 0.08);
  --shadow-hover: 0 18px 45px rgba(44, 44, 42, 0.16);
  --radius: 16px;
  --radius-sm: 10px;
  --nav-h: 64px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0C2340;
  --surface: #122E52;
  --surface-2: #0F294A;
  --accent: #378ADD;
  --accent-2: #5BA3E4;
  --accent-soft: rgba(55, 138, 221, 0.16);
  --amber: #EF9F27;
  --text: #FAFAF9;
  --muted: #b8c6d8;
  --border: rgba(250, 250, 249, 0.14);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 18px 45px rgba(0, 0, 0, 0.5);
}

/* ===== Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-2); }
img { max-width: 100%; display: block; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--border); }
h1, h2, h3 { font-family: var(--font-head); font-weight: 600; letter-spacing: -0.02em; }

/* Reveal on scroll */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav .container { display: flex; align-items: center; gap: 24px; height: 100%; }
.nav-logo {
  font-family: var(--font-head); font-weight: 700; font-size: 1.05rem; color: var(--text);
  display: inline-flex; align-items: center; gap: 10px;
}
.nav-logo .om {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.02em;
}
.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-links a {
  color: var(--muted); font-size: 0.9rem; font-weight: 500;
  padding: 8px 12px; border-radius: 8px;
}
.nav-links a:hover { color: var(--text); background: var(--accent-soft); }
.theme-toggle {
  width: 38px; height: 38px; flex: none; cursor: pointer;
  display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text);
  transition: border-color var(--transition), background var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }

/* Mobile nav */
@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ===== Hero ===== */
.hero {
  padding: 88px 0 64px;
  text-align: center;
  background:
    radial-gradient(600px 300px at 15% 0%, var(--accent-soft), transparent 70%),
    radial-gradient(600px 300px at 85% 10%, var(--accent-soft), transparent 70%),
    var(--bg);
}
.hero .avatar {
  width: 120px; height: 120px; margin: 0 auto 24px;
  border-radius: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--amber));
  display: grid; place-items: center;
  font-family: var(--font-head); font-size: 2.6rem; font-weight: 700; color: #fff;
  box-shadow: var(--shadow);
  position: relative;
}
.hero .avatar::after {
  content: ""; position: absolute; inset: -8px; border-radius: 40px;
  border: 1px solid var(--border);
}
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); line-height: 1.1; }
.hero .typewriter {
  margin: 18px auto 6px; min-height: 2.2em;
  font-family: var(--font-head); font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  color: var(--accent);
}
.hero .typewriter .caret {
  display: inline-block; width: 2px; margin-left: 2px;
  background: var(--amber); color: transparent;
  animation: blink 0.9s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero .lead { max-width: 560px; margin: 14px auto 0; color: var(--muted); font-size: 0.98rem; }
.hero .actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 11px 20px; border-radius: 999px;
  font-weight: 600; font-size: 0.92rem;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  transition: all var(--transition);
}
.btn svg { width: 18px; height: 18px; }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--accent); color: var(--text); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-2); color: #fff; }

/* ===== Section headers ===== */
.section-head { margin-bottom: 36px; }
.section-head .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--amber);
}
.section-head h2 { font-size: clamp(1.6rem, 3.4vw, 2.1rem); margin-top: 8px; }
.section-head p { color: var(--muted); margin-top: 8px; max-width: 60ch; }

/* ===== Cards / About ===== */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
}
.about-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.about-grid p + p { margin-top: 12px; }
.about-highlights { display: grid; gap: 12px; margin-top: 20px; }
.highlight { display: flex; gap: 14px; align-items: flex-start; }
.highlight .dot {
  width: 36px; height: 36px; flex: none; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
}
.highlight .dot svg { width: 18px; height: 18px; }
.highlight b { display: block; }
.highlight span { color: var(--muted); font-size: 0.92rem; }

/* ===== Skills ===== */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.skill-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: all var(--transition); }
.skill-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-4px); }
.skill-card h3 { font-size: 1.02rem; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.skill-card h3 svg { width: 18px; height: 18px; color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: var(--accent-soft); color: var(--accent);
  border: 1px solid transparent; border-radius: 999px;
  padding: 5px 12px; font-size: 0.82rem; font-weight: 500;
  transition: all var(--transition);
}
.chip:hover { border-color: var(--accent); }
.chip--amber { background: rgba(239, 159, 39, 0.14); color: var(--amber); }
.chip--amber:hover { border-color: var(--amber); }

/* ===== Projects (carousel) ===== */
.projects-carousel {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}
.carousel-viewport {
  overflow: hidden;
  width: 100%;
  padding: 20px 0;
}
.carousel-track {
  --card-w: min(620px, 78vw);
  display: flex;
  gap: 24px;
  will-change: transform;
}
.carousel-card {
  width: var(--card-w);
  flex: none;
  opacity: 0.5;
  transform: scale(0.94);
}
.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
  transition: opacity var(--transition), transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.carousel-card.active {
  opacity: 1;
  transform: scale(1);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.carousel-card:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.carousel-card.active:hover { box-shadow: var(--shadow-hover); }
.project-card .shot { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: var(--surface-2); }
.shot--dark { display: none; }
[data-theme="dark"] .shot--dark { display: block; }
[data-theme="dark"] .shot--light { display: none; }
.project-card .body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.project-card h3 { font-size: 1.15rem; }
.project-card h3 a { color: var(--text); }
.project-card h3 a:hover { color: var(--accent); }
.project-card .desc { color: var(--muted); font-size: 0.93rem; margin: 12px 0 16px; flex: 1; }
.project-card .desc strong { color: var(--text); font-weight: 600; }
.project-card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.project-card .btn { align-self: flex-start; }

.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  z-index: 10;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.6rem; line-height: 1;
  cursor: pointer;
  display: grid; place-items: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.carousel-btn:hover { border-color: var(--accent); color: var(--accent); box-shadow: var(--shadow-hover); }
.carousel-prev { left: -10px; }
.carousel-next { right: -10px; }

/* ===== Timeline ===== */
.timeline { position: relative; margin-top: 8px; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--accent), var(--amber));
}
.tl-item { position: relative; padding: 0 0 28px 18px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -27px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--surface); border: 3px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.tl-item h3 { font-size: 1.05rem; }
.tl-item .company { color: var(--accent); font-weight: 500; }
.tl-item .role-tag {
  display: inline-block; margin-left: 8px; vertical-align: middle;
  font-size: 0.74rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--amber); border: 1px solid var(--amber); border-radius: 6px; padding: 2px 8px;
}
.tl-item .desc { color: var(--muted); font-size: 0.93rem; margin-top: 8px; }

/* ===== Education / Contact ===== */
.edu-card { display: flex; gap: 18px; align-items: flex-start; }
.edu-card .icon {
  width: 46px; height: 46px; flex: none; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
}
.edu-card .icon svg { width: 22px; height: 22px; }
.edu-card .degree { font-weight: 600; }
.edu-card .school { color: var(--muted); font-size: 0.9rem; }
.contact-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.contact-link {
  display: flex; align-items: center; gap: 14px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; color: var(--text);
  transition: all var(--transition);
}
.contact-link:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow); color: var(--text); }
.contact-link svg { width: 22px; height: 22px; color: var(--accent); flex: none; }
.contact-link .lbl { display: block; font-size: 0.82rem; color: var(--muted); }
.contact-link .val { font-weight: 600; }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--border); padding: 36px 0 48px; text-align: center; color: var(--muted); font-size: 0.88rem; }
footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 720px) {
  section { padding: 56px 0; }
  .hero { padding: 64px 0 48px; }
  .hero .avatar { width: 96px; height: 96px; font-size: 2rem; border-radius: 26px; }
  .timeline { padding-left: 20px; }
  .tl-item { padding-left: 14px; }
  .tl-item::before { left: -21px; }
  .carousel-btn { width: 38px; height: 38px; font-size: 1.4rem; }
  .carousel-prev { left: 2px; }
  .carousel-next { right: 2px; }
}