:root {
  --bg: #EDF0F5;
  --surface: #E1E6EF;
  --ink: #14213D;
  --muted: #55627C;
  --line: #C3CBDA;
  --accent: #2F4BFF;
  --accent-ink: #FFFFFF;
  --display: "Bricolage Grotesque", system-ui, sans-serif;
  --body: "IBM Plex Sans", system-ui, sans-serif;
  --pad: clamp(1.25rem, 5vw, 4rem);
  --max: 1200px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F1626; --surface: #172036; --ink: #E8ECF5; --muted: #9AA7C2; --line: #26324D; --accent: #7C8DFF; --accent-ink: #0F1626;
  }
}
:root[data-theme="dark"] {
  --bg: #0F1626; --surface: #172036; --ink: #E8ECF5; --muted: #9AA7C2; --line: #26324D; --accent: #7C8DFF; --accent-ink: #0F1626;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 1.0625rem/1.65 var(--body);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--bg); padding: .5rem 1rem; z-index: 100; }
.skip:focus { left: 1rem; top: 1rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem var(--pad);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { font: 800 1.25rem var(--display); text-decoration: none; letter-spacing: -.02em; }
.nav { display: flex; align-items: center; gap: 1.75rem; }
.nav a { text-decoration: none; font-weight: 500; color: var(--muted); transition: color .15s; }
.nav a:hover, .nav a.active { color: var(--ink); }
.nav a.active { box-shadow: 0 2px 0 var(--accent); }
.theme-toggle {
  width: 2.5rem; height: 2.5rem; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); cursor: pointer;
}
.theme-toggle:hover { background: var(--surface); }
.nav-toggle { display: none; }

/* Layout */
main { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.section { padding: clamp(4rem, 9vw, 7rem) 0 0; }
h2 { font: 700 clamp(1.75rem, 3.5vw, 2.5rem)/1.1 var(--display); letter-spacing: -.02em; margin: 0 0 2rem; }
h3 { font: 700 1rem var(--display); margin: 0 0 .25rem; }

/* Hero */
.hero { padding-top: clamp(3rem, 8vw, 6rem); display: grid; gap: 2.5rem; }
.badge { display: inline-flex; align-items: center; gap: .6rem; margin: 0; width: fit-content;
  padding: .35rem .9rem; border: 1px solid var(--line); border-radius: 99px; font-size: .9rem; color: var(--muted); }
.dot { width: .6rem; height: .6rem; border-radius: 50%; background: #1FB76A; box-shadow: 0 0 0 0 rgba(31,183,106,.6); animation: pulse 2.4s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 .6rem rgba(31,183,106,0); } 100% { box-shadow: 0 0 0 0 rgba(31,183,106,0); } }

.hero-name {
  margin: 0; font: 800 clamp(4rem, 17vw, 12.5rem)/.88 var(--display);
  letter-spacing: -.045em;
}
.hero-name .line { display: block; overflow: hidden; padding-bottom: .06em; }
.hero-name .word { display: inline-block; transform: translateY(105%); animation: rise .9s cubic-bezier(.2,.8,.2,1) forwards; animation-delay: calc(var(--i) * .12s + .1s); }
.hero-name .line:last-child .word { color: var(--accent); }
@keyframes rise { to { transform: none; } }

.hero-side { display: grid; gap: .75rem; max-width: 40rem; }
.hero-role { margin: 0; color: var(--muted); font-weight: 500; }
.hero-headline { margin: 0; font: 700 clamp(1.4rem, 2.6vw, 1.9rem)/1.25 var(--display); letter-spacing: -.01em; }
.hero-intro { margin: 0; color: var(--muted); max-width: 34rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: .75rem; }

.btn {
  display: inline-block; padding: .8rem 1.5rem; border: 2px solid var(--accent);
  background: var(--accent); color: var(--accent-ink); border-radius: 8px;
  font: 700 1rem var(--body); text-decoration: none; cursor: pointer; transition: transform .15s, background .15s;
}
.btn:hover { transform: translateY(-2px); }
.btn:disabled { opacity: .6; cursor: wait; transform: none; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

/* Projects */
.projects { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.project { border-bottom: 1px solid var(--line); }
.project a {
  display: grid; grid-template-columns: 5rem 1fr auto; gap: 1.5rem; align-items: baseline;
  padding: 1.75rem .5rem; text-decoration: none; transition: background .2s, padding .2s;
}
.project a:hover, .project a:focus-visible { background: var(--surface); padding-left: 1.25rem; }
.p-year { color: var(--muted); font-variant-numeric: tabular-nums; }
.p-title { display: block; font: 700 clamp(1.4rem, 3vw, 2rem)/1.15 var(--display); letter-spacing: -.02em; }
.project a:hover .p-title { color: var(--accent); }
.p-desc { display: block; color: var(--muted); max-width: 36rem; margin-top: .35rem; }
.p-tags { display: flex; flex-wrap: wrap; gap: .4rem; justify-content: flex-end; max-width: 16rem; }
.tag { padding: .15rem .7rem; border: 1px solid var(--line); border-radius: 99px; font-size: .85rem; color: var(--muted); }

/* About */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem 4rem; }
.about h2 { grid-column: 1 / -1; margin-bottom: 1rem; }
.about-text p { margin: 0 0 1rem; max-width: 36rem; }
.skills { display: grid; gap: 1.5rem; align-content: start; }
.skill-group p { margin: 0; color: var(--muted); }
.skill-group { padding-left: 1rem; border-left: 3px solid var(--accent); }

/* Timeline (a real sequence, so it gets a rail) */
.timeline { list-style: none; margin: 0; padding: 0 0 0 1.5rem; border-left: 2px solid var(--line); }
.timeline li { position: relative; display: grid; grid-template-columns: 10rem 1fr auto; gap: 1rem; padding: .9rem 0; }
.timeline li::before { content: ""; position: absolute; left: calc(-1.5rem - 6px); top: 1.5rem; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.t-when { color: var(--muted); font-variant-numeric: tabular-nums; }
.t-what { font-weight: 500; }
.t-where { color: var(--muted); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 3rem 5rem; }
.contact-lead { font: 700 1.5rem/1.3 var(--display); margin: 0 0 1rem; max-width: 22rem; }
.mail { font-size: 1.15rem; color: var(--accent); font-weight: 500; }
.socials { list-style: none; padding: 0; margin: 1.5rem 0 0; display: flex; gap: 1.25rem; flex-wrap: wrap; }
.socials a { color: var(--muted); }
.socials a:hover { color: var(--ink); }

.form { display: grid; gap: .5rem; }
.form label { font-weight: 500; font-size: .95rem; margin-top: .75rem; }
.form input, .form textarea {
  width: 100%; padding: .8rem 1rem; font: inherit; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent); }
.form textarea { resize: vertical; }
.form .btn { margin-top: 1rem; justify-self: start; }
.form-status { min-height: 1.5rem; margin: .5rem 0 0; font-weight: 500; }
.form-status.ok { color: #1E9E5A; }
.form-status.err { color: #D64545; }
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

/* Footer */
.site-footer { display: flex; justify-content: space-between; max-width: var(--max); margin: 6rem auto 0; padding: 1.5rem var(--pad) 2.5rem; border-top: 1px solid var(--line); color: var(--muted); }
.site-footer p { margin: 0; }

/* Responsive */
@media (max-width: 820px) {
  .nav-toggle { display: grid; gap: 6px; width: 2.5rem; height: 2.5rem; place-content: center; background: none; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
  .nav-toggle span { width: 18px; height: 2px; background: var(--ink); transition: transform .2s; }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .nav { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 1rem;
    padding: 1.25rem var(--pad); background: var(--bg); border-bottom: 1px solid var(--line); display: none; }
  .nav.open { display: flex; }
  .project a { grid-template-columns: 1fr; gap: .5rem; }
  .p-tags { justify-content: flex-start; max-width: none; }
  .about, .contact-grid { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 1fr; gap: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-name .word { animation: none; transform: none; }
  .dot { animation: none; }
  * { transition: none !important; }
}