:root {
  --bg: #0b1120;
  --bg-soft: #111a2e;
  --card: #131d33;
  --border: #24304d;
  --text: #e6ecf6;
  --muted: #97a4bd;
  --accent: #38bdf8;
  --accent-2: #22c55e;
  --accent-3: #a78bfa;
  --radius: 14px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, #16233f 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(11, 17, 32, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__brand { font-weight: 800; letter-spacing: -0.02em; font-size: 1.05rem; }
.nav__brand span { color: var(--accent); }
.nav__links { display: flex; gap: 1.2rem; margin-left: auto; font-size: 0.92rem; }
.nav__links a { color: var(--muted); transition: color 0.2s; }
.nav__links a:hover { color: var(--text); }

/* BUTTONS */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #04121f;
  font-weight: 600;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  font-size: 0.95rem;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -12px var(--accent); }
.btn--sm { padding: 0.45rem 0.95rem; font-size: 0.85rem; }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--accent); box-shadow: none; }

/* HERO */
.hero { padding: clamp(3rem, 9vw, 6rem) clamp(1rem, 4vw, 2.5rem) 2rem; }
.hero__inner { max-width: var(--max); margin: 0 auto; }
.hero__eyebrow { color: var(--accent); font-weight: 600; letter-spacing: 0.04em; margin: 0 0 0.6rem; font-size: 0.9rem; }
.hero h1 { font-size: clamp(2.4rem, 7vw, 4rem); margin: 0; letter-spacing: -0.03em; font-weight: 800; }
.hero__title { font-size: clamp(1.05rem, 2.6vw, 1.4rem); color: var(--muted); font-weight: 600; margin: 0.4rem 0 1rem; }
.hero__tagline { max-width: 640px; color: var(--text); font-size: 1.08rem; margin: 0 0 1.8rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-bottom: 2.5rem; }

/* HIGHLIGHTS */
.highlights { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.highlight { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem 1.2rem; }
.highlight__metric { font-size: 1.7rem; font-weight: 800; color: var(--accent-2); letter-spacing: -0.02em; }
.highlight__label { font-size: 0.86rem; color: var(--muted); margin-top: 0.2rem; }

/* SECTIONS */
.section { max-width: var(--max); margin: 0 auto; padding: clamp(2.5rem, 6vw, 4rem) clamp(1rem, 4vw, 2.5rem); }
.section__title { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 0.4rem; }
.section__title::after { content: ""; display: block; width: 46px; height: 3px; background: var(--accent); border-radius: 3px; margin-top: 0.6rem; }
.section__lead { color: var(--muted); margin: 0.8rem 0 1.6rem; max-width: 680px; }
.about { max-width: 760px; font-size: 1.05rem; }
.about--muted { color: var(--muted); }

/* SKILLS */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.skill { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem 1.2rem; }
.skill h4 { margin: 0 0 0.6rem; font-size: 0.92rem; color: var(--accent); font-weight: 600; }
.skill__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag { font-size: 0.76rem; background: var(--bg-soft); border: 1px solid var(--border); color: var(--muted); padding: 0.2rem 0.6rem; border-radius: 999px; font-family: 'JetBrains Mono', monospace; }

/* FILTERS */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.filter { background: transparent; border: 1px solid var(--border); color: var(--muted); padding: 0.4rem 0.9rem; border-radius: 999px; cursor: pointer; font-size: 0.85rem; font-family: inherit; transition: all 0.2s; }
.filter:hover { color: var(--text); border-color: var(--accent); }
.filter.is-active { background: var(--accent); color: #04121f; border-color: var(--accent); font-weight: 600; }

/* CARDS */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.2rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; display: flex; flex-direction: column; transition: transform 0.15s, border-color 0.2s; }
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card__cover { display: block; margin: -1.4rem -1.4rem 1rem; border-radius: var(--radius) var(--radius) 0 0; overflow: hidden; border-bottom: 1px solid var(--border); }
.card__cover img { width: 100%; height: 170px; object-fit: cover; display: block; }
.card__cat { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent-3); font-weight: 600; }
.card h4 { margin: 0.4rem 0 0.6rem; font-size: 1.12rem; letter-spacing: -0.01em; }
.card__summary { color: var(--muted); font-size: 0.92rem; flex: 1; }
.card__tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 1rem 0; }
.card__links { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: auto; }
.card__links a { color: var(--accent); font-size: 0.88rem; font-weight: 600; }
.card__links a:hover { text-decoration: underline; }
.card__read { color: #04121f !important; background: var(--accent); padding: 0.3rem 0.7rem; border-radius: 7px; }
.card__read:hover { text-decoration: none !important; opacity: 0.9; }

/* TIMELINE */
.timeline { display: grid; gap: 1rem; }
.job { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.3rem 1.4rem; }
.job__head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem; align-items: baseline; }
.job__role { font-weight: 700; font-size: 1.1rem; }
.job__company { color: var(--accent); font-weight: 600; }
.job__period { color: var(--muted); font-size: 0.85rem; font-family: 'JetBrains Mono', monospace; }
.job__summary { color: var(--muted); margin: 0.5rem 0 0; font-size: 0.95rem; }

/* CERTS */
.certs { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0.7rem; }
.cert { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 0.8rem 1rem; font-size: 0.9rem; display: flex; gap: 0.6rem; align-items: center; }
.cert::before { content: "✓"; color: var(--accent-2); font-weight: 800; }
.cert--progress::before { content: "◌"; color: var(--accent-3); }
.cert--link { cursor: pointer; transition: border-color .15s, transform .15s; }
.cert--link:hover { border-color: var(--accent); transform: translateY(-2px); }
.cert__verify { margin-left: auto; color: var(--accent); font-size: 0.78rem; font-weight: 600; white-space: nowrap; }

/* CONTACT */
.section--contact { text-align: center; }
.section--contact .section__title::after { margin-left: auto; margin-right: auto; }
.contact { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.8rem; margin-top: 1rem; }
.contact-form { max-width: 620px; margin: 2rem auto 0; text-align: left; display: flex; flex-direction: column; gap: 0.8rem; }
.contact-form__row { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.contact-form__row input { flex: 1 1 200px; }
.contact-form input, .contact-form textarea { width: 100%; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 0.7rem 0.9rem; color: var(--text); font: inherit; }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--accent); }
.contact-form textarea { resize: vertical; }
.contact-form .btn { align-self: flex-start; }
.contact-form__status { min-height: 1.2em; font-size: 0.85rem; margin: 0; color: var(--muted); }
.contact-form__status.is-ok { color: var(--accent-2); }
.contact-form__status.is-error { color: #f87171; }

/* FOOTER */
.footer { border-top: 1px solid var(--border); text-align: center; color: var(--muted); font-size: 0.85rem; padding: 2rem 1rem; }

@media (max-width: 640px) {
  .nav__links { display: none; }
}