/* =========================
   Theme & Reset
   ========================= */
:root{
  --bg: #0b1220;
  --card: #111a2b;
  --muted: #94a3b8;
  --text: #e6eef8;
  --primary: #2b6cb0;
  --primary-600: #2c5282;
  --accent: #60a5fa;
  --ring: rgba(96,165,250,.35);
  --shadow: 0 10px 30px rgba(2,12,27,0.4);
  --radius: 16px;
  --space: clamp(1rem, 1.2vw + .6rem, 1.6rem);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 100% -10%, rgba(96,165,250,.1), transparent 40%), var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img{ max-width:100%; display:block; border-radius: calc(var(--radius) - 4px); }

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }

/* Containers & Layout */
.container{
  width:min(1100px, 92%);
  margin-inline:auto;
}

.grid-2{
  display:grid;
  gap: clamp(1rem, 2vw, 2rem);
  grid-template-columns: 1.15fr .85fr;
  align-items: center;
}

.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space);
}

@media (max-width: 900px){
  .grid-2{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr; }
}

/* Header */
.site-header{
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: linear-gradient(to bottom, rgba(11,18,32,.85), rgba(11,18,32,.6));
  border-bottom: 1px solid rgba(148,163,184,.12);
}

.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding: .8rem 0;
}

.brand{ display:flex; align-items:center; gap:.6rem; font-weight: 800; letter-spacing:.2px; }
.brand__dot{
  width: 14px; height: 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  box-shadow: 0 0 0 3px var(--ring);
}
.brand__text{ color:#e2e8f0; }
.brand__accent{ color: var(--accent); }

.nav__menu{
  display:flex; align-items:center; gap: 1rem; list-style:none; margin:0; padding:0;
}
.nav__link{
  padding: .5rem .8rem; border-radius: 999px; position: relative;
}
.nav__link:hover{
  background: rgba(148,163,184,.14);
  text-decoration:none;
}
.nav__link--cta{
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #081227;
  font-weight: 600;
  border: 0;
}
.nav__toggle{ display:none; background:none; border:0; cursor:pointer; }
.nav__toggle .nav__bar{
  width: 24px; height: 2px; background:#cbd5e1; display:block; margin:5px 0;
  transition: transform .3s ease;
}

@media (max-width: 820px){
  .nav__toggle{ display:block; }
  .nav__menu{
    position: absolute; right: 1rem; top: 60px; padding: .8rem;
    background: var(--card); border: 1px solid rgba(148,163,184,.15);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display:none; flex-direction: column; gap:.4rem;
    min-width: 200px;
  }
  .nav__menu.show{ display:flex; }
}

/* Hero */
.hero{
  position: relative; padding: clamp(3rem, 6vw, 6rem) 0;
}
.hero__title{ font-size: clamp(1.8rem, 2.6vw + 1rem, 3rem); margin:0 0 .4rem; }
.hero__subtitle{ color: var(--muted); font-weight: 600; letter-spacing:.4px; margin: 0 0 1rem; }
.hero__summary{ color:#cbd5e1; max-width: 62ch; }
.hero__actions{ display:flex; gap:.8rem; margin-top: 1.2rem; }
.hero__meta{ list-style: none; padding:0; margin: 1.4rem 0 0; display:grid; gap:.3rem; }
.hero__image{ justify-self: center; }
.hero__bg-shape{
  position:absolute; inset: auto -15% -20% -15%; height: 220px; z-index: -1;
  background: radial-gradient(800px 250px at 50% 0%, rgba(96,165,250,.18), transparent 60%);
  filter: blur(30px);
}

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

/* Sections */
.section{ padding: clamp(2.5rem, 5vw, 4rem) 0; }
.section--alt{ background: linear-gradient(180deg, rgba(148,163,184,.08), transparent 40%); }
.section__title{ font-size: clamp(1.4rem, 1.2vw + 1rem, 2rem); margin-bottom: 1.2rem; }

/* Cards */
.card{
  background: var(--card);
  border: 1px solid rgba(148,163,184,.12);
  border-radius: var(--radius);
  padding: clamp(1rem, 1.2vw + .6rem, 1.6rem);
  box-shadow: var(--shadow);
}

/* Tags */
.tags{ list-style:none; padding:0; margin:.6rem 0 0; display:flex; flex-wrap:wrap; gap:.4rem; }
.tags li{
  padding: .3rem .6rem; border: 1px solid rgba(148,163,184,.2);
  border-radius: 999px; color:#cbd5e1; font-size:.9rem;
}

/* Timeline */
.timeline{ display:grid; gap: var(--space); }
.timeline__item{ display:grid; gap:.6rem; grid-template-columns: 260px 1fr; }
.timeline__meta h3{ margin:.2rem 0 .2rem; }
.timeline__meta .role{ color:#cbd5e1; margin:0; }
.timeline__meta .date{ color: var(--muted); margin:.2rem 0 0; font-size:.95rem; }
.timeline__points{ margin:0; padding-left: 1.2rem; }
.timeline__points li{ margin:.4rem 0; }

@media (max-width: 820px){
  .timeline__item{ grid-template-columns: 1fr; }
}

/* Projects */
.projects{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space);
}
.project{ overflow:hidden; padding:0; }
.project__img{ width:100%; aspect-ratio: 16/10; object-fit: cover; }
.project__body{ padding: 1rem 1rem 1.2rem; }
.project__links{ display:flex; gap:.6rem; margin-top:.8rem; }

@media (max-width: 950px){
  .projects{ grid-template-columns: 1fr; }
}

/* Contact */
.contact{ display:grid; gap: var(--space); grid-template-columns: 1.2fr .8fr; align-items:start; }
.contact__list{ list-style:none; padding:0; margin:0; display:grid; gap:.4rem; }
.field{ display:grid; gap:.3rem; margin-bottom:.8rem; }
.field input, .field textarea{
  width:100%; padding:.8rem .9rem; border-radius:12px;
  background:#0c1729; border:1px solid rgba(148,163,184,.22); color: var(--text);
  outline: none; transition: border .2s ease, box-shadow .2s ease;
}
.field input:focus, .field textarea:focus{
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--ring);
}
.field__hint{ font-size:.85rem; color:#fca5a5; min-height: 1.2em; }
.form__status{ margin-top:.6rem; color:#86efac; }

@media (max-width: 900px){
  .contact{ grid-template-columns: 1fr; }
}

/* Buttons */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  border-radius: 999px; padding:.7rem 1rem; font-weight:600; cursor:pointer;
  border:1px solid rgba(148,163,184,.22); background:#0c1729; color: var(--text);
  transition: transform .06s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.btn:hover{ text-decoration:none; border-color: rgba(148,163,184,.35); }
.btn:active{ transform: translateY(1px); }
.btn--primary{
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color:#081227; border:0;
}
.btn--ghost{ background: transparent; }
.btn--ghost:hover{ background: rgba(148,163,184,.12); }

/* Footer */
.site-footer{ border-top: 1px solid rgba(148,163,184,.1); padding: 1.4rem 0; }
.footer-inner{ display:flex; align-items:center; justify-content:space-between; }
.to-top{ padding:.3rem .6rem; border-radius:8px; border:1px solid rgba(148,163,184,.2); }
.to-top:hover{ background: rgba(148,163,184,.14); text-decoration:none; }

/* Accessibility */
.skip-link{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left: 1rem; top: 1rem; width:auto; height:auto; padding:.6rem .8rem; background:#111827; color:#fff; border-radius:8px;
}

/* Reveal Animations */
.reveal{ opacity:0; transform: translateY(10px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible{ opacity:1; transform: translateY(0); }