/* ===================== THEME TOKENS ===================== */
:root {
  --max: 1040px;
  --gap: 1.25rem;

  /* Light (default) */
  --bg: #ffffff;
  --text: #141414;
  --muted: #666666;
  --card: #ffffff;
  --border: #eeeeee;
  --accent: #1f7aec;
  --backdrop: rgba(0,0,0,0.45);

  /* Subtle background pattern (light) */
  --bg-dot: #e0e0e0;
  --bg-solid: #fdfdfd;

  /* Timeline */
  --exp-node: 80px;
  --exp-node-col: 120px;
  --exp-gap: 1rem;
  --exp-spine: #e9e9e9;    /* spine/connector color */
  --exp-accent: var(--accent);
}

/* Dark mode overrides (html[data-theme="dark"]) */
html[data-theme="dark"] {
  --bg: #0f1216;
  --text: #e7eaf0;
  --muted: #a5adbb;
  --card: #151a21;
  --border: #232a33;
  --accent: #7aa2ff;
  --backdrop: rgba(0,0,0,0.6);
  --bg-dot: #252b35;
  --bg-solid: #0f1216;

  --exp-spine: #2a323d;
}

/* Smooth theme transitions (optional) */
html, body, .card, .exp-card, .modal__dialog, .nav {
  transition: background-color .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease;
}

/* ===================== BASE ===================== */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color: var(--text);
  background-color: var(--bg-solid);
  background-image: radial-gradient(var(--bg-dot) 1px, transparent 1px);
  background-size: 20px 20px;
}
.container { max-width: var(--max); margin: 0 auto; padding: 0 var(--gap); }

/* Utility: screen-reader only */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html, body, .card, .exp-card, .modal__dialog, .nav { transition: none; }
}

/* ===================== NAV ===================== */
.nav {
  position: sticky; top: 0;
  backdrop-filter: blur(8px);
  /* light/dark-friendly translucent background */
  background:
    color-mix(in oklab, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: transform .25s ease;
}
.nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  font-weight: 700; letter-spacing: .5px; text-decoration: none; color: var(--text);
}
.nav-links { display: flex; gap: 1rem; list-style: none; padding: 0; margin: 0; }
.nav a { text-decoration: none; color: var(--text); }

/* ===================== SECTIONS / HERO ===================== */
.section { padding: 64px 0; }
.hero {
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 2rem; align-items: center;
}
.hero .headshot {
  width: 400px; height: 400px; object-fit: cover; border-radius: 16px; justify-self: end;
}
.hero .links a { margin-right: .75rem; }

/* ===================== GRID / CARDS ===================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.card {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.card img { width: 100%; height: 160px; object-fit: cover; }
.card-body { padding: 1rem; }
.card h3 { margin: 0 0 .5rem; color: var(--text); }
.bullets { margin: .5rem 0; padding-left: 1.25rem; }
.meta { color: var(--muted); font-size: .9rem; margin-top: .25rem; }
.actions a { margin-right: .75rem; }

/* Keep teaser cards minimal */
.card .bullets,
.card .meta,
.card .actions a:not(.details-btn) {
  display: none;
}

/* ===================== BUTTONS ===================== */
.btn {
  appearance: none;
  border: 1px solid var(--border);
  padding: .5rem .9rem;
  border-radius: 10px;
  background: color-mix(in oklab, var(--card) 90%, #fff 5%);
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}
.btn:hover {
  background: color-mix(in oklab, var(--card) 80%, #fff 8%);
}

/* ===================== FOOTER ===================== */
.footer {
  padding: 24px 0;
  color: var(--muted);
  font-size: .9rem;
  border-top: 1px solid var(--border);
}

/* ===================== MODAL ===================== */
.modal {
  position: fixed; inset: 0; z-index: 2000;
  display: grid; grid-template-rows: 1fr; place-items: center;
  opacity: 0; pointer-events: none; transform: scale(.98);
  transition: opacity .18s ease, transform .18s ease;
}
.modal.open { opacity: 1; pointer-events: auto; transform: scale(1); }
.modal__backdrop { position: absolute; inset: 0; background: var(--backdrop); }
.modal__dialog {
  position: relative;
  width: min(920px, 92vw);
  max-height: 86vh;
  overflow: auto;
  border-radius: 16px;
  background: var(--card);
  box-shadow: 0 10px 40px rgba(0,0,0,.18);
}
.modal__close {
  position: absolute; top: .5rem; right: .5rem;
  width: 36px; height: 36px; border-radius: 999px;
  border: none; background: color-mix(in oklab, var(--card) 80%, #000 5%); cursor: pointer;
  font-size: 22px; line-height: 1;
}
.modal__close:hover { background: color-mix(in oklab, var(--card) 80%, #000 10%); }
.modal__content {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 1.25rem; padding: 1.25rem;
}
.modal__content .modal-hero {
  width: 100%; height: 100%; max-height: 380px; object-fit: cover; border-radius: 12px;
}
.modal__content .modal-body h3 { margin: 0 0 .25rem; }
.modal__content .modal-body h4 { margin: .75rem 0 .25rem; }
.modal__content .bullets { margin: .5rem 0 .5rem 1.25rem; }
.modal__content .actions a { margin-right: .75rem; }

/* Mobile modal layout */
@media (max-width: 720px) {
  .modal__content { grid-template-columns: 1fr; }
  .modal__content .modal-hero { max-height: 240px; }
}

/* Prevent page scroll while modal open */
body.modal-open { overflow: hidden; }

/* ===================== TIMELINE ===================== */
.exp-tl {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  position: relative;
}

/* Vertical spine through center of bubble column */
.exp-tl::before {
  content: "";
  position: absolute;
  left: calc(var(--exp-node-col) / 2);
  top: 0; bottom: 0;
  width: 2px;
  background: var(--exp-spine);
  transform: translateX(-1px); /* center the 2px line */
}

/* Row: bubble column + card column */
.exp-item {
  display: grid;
  grid-template-columns: var(--exp-node-col) 1fr;
  gap: var(--exp-gap);
  position: relative;
  padding-bottom: 2rem;
}

.exp-node { position: relative; display: grid; align-content: start; }

/* Blue date bubble (date text inside) */
.exp-dot {
  display: flex; align-items: center; justify-content: center;
  width: var(--exp-node); height: var(--exp-node);
  border-radius: 50%;
  background: var(--exp-accent);
  color: #fff; font-size: .8rem; font-weight: 700; text-align: center;
  padding: .25rem; position: relative; z-index: 1;
  /* center bubble on spine */
  margin-left: calc((var(--exp-node-col) / 2) - (var(--exp-node) / 2));
  line-height: 1.1;
}

/* Connector from spine to card */
.exp-card::before {
  content: "";
  position: absolute;
  left: calc(-1 * ((var(--exp-node-col) / 2) + var(--exp-gap)));
  width: calc((var(--exp-node-col) / 2) + var(--exp-gap));
  height: 2px;
  background: var(--exp-spine);
  top: calc(var(--exp-node) / 2); /* aligns to bubble center */
}

/* Experience card */
.exp-card {
  position: relative;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 14px;
  padding: 1rem 1rem 1rem 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.exp-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
  border-color: color-mix(in oklab, var(--accent) 18%, var(--border));
}
.exp-head {
  display: flex;
  justify-content: space-between; /* pushes logo to the right */
  align-items: center;
  flex-wrap: wrap;
}
.exp-logo { width: 100px; height: 100px; object-fit: contain; }
.exp-role { margin: 0; font-size: 1.05rem; line-height: 1.2; color: var(--text); }
.exp-company { color: var(--accent); font-weight: 600; }
.exp-summary { margin: .4rem 0 .6rem; color: var(--text); }
.exp-bullets { margin: .5rem 0 0 .95rem; }

/* Hide the extra section by default (until JS toggles it) */
.exp-extra[hidden] { display: none; }

/* Button placement/spacing in the card */
.exp-details-btn { margin-top: .5rem; }

/* Optional: a subtle “open” state for the card when expanded */
.exp-card.is-open {
  border-color: color-mix(in oklab, var(--accent) 20%, var(--border));
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}

/* Responsive timeline variables tweak */
@media (max-width: 700px) {
  :root {
    --exp-node: 68px;
    --exp-node-col: 104px;
    --exp-gap: .75rem;
  }
}

/* ===================== FEATURED PROJECTS ===================== */
.grid--featured {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

/* Bigger card treatment for featured */
.card--featured { border-width: 2px; box-shadow: 0 4px 12px rgba(0,0,0,.06); background: var(--card); }
.card--featured img { height: 260px; object-fit: cover; }
.card--featured .card-body h3 { font-size: 1.25rem; margin-bottom: .4rem; color: var(--text); }
.card--featured .card-body p { font-size: 1rem; }

/* Optional: on large screens, let featured span 2 columns if space allows */
@media (min-width: 1100px) {
  .card--featured { grid-column: span 2; }
}

/* Subhead spacing */
.projects-subhead { margin-top: 2rem; }

/* ===================== RESPONSIVE HERO ===================== */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .hero .headshot { justify-self: start; }
}

/* ===================== LINKS ===================== */
a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: color-mix(in oklab, var(--accent) 70%, white 30%);
  text-decoration: underline;
}

a:visited {
  color: var(--accent); /* keep same as normal */
}