/* =====================================================
   Bram van Es — Personal Showcase
   ===================================================== */

:root {
  --bg:        #0d0f14;
  --surface:   #161a24;
  --surface2:  #1e2435;
  --accent:    #6c8eff;
  --accent2:   #a78bfa;
  --text:      #e2e8f0;
  --muted:     #8892a4;
  --border:    #2a3347;
  --radius:    14px;
  --max-w:     960px;
  --font:      'Inter', system-ui, sans-serif;
  --mono:      'JetBrains Mono', 'Fira Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

/* ── Nav ─────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,15,20,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: .75rem 1.5rem;
}

nav .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

nav .logo {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .04em;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.8rem;
}

nav ul a {
  color: var(--muted);
  text-decoration: none;
  font-size: .9rem;
  letter-spacing: .02em;
  transition: color .2s;
}

nav ul a:hover { color: var(--text); }

/* ── Hero ─────────────────────────────────────── */
#hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(108,142,255,.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%,  rgba(167,139,250,.12) 0%, transparent 55%);
  pointer-events: none;
}

.hero-content { position: relative; max-width: 680px; }

.hero-avatar-link {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  display: block;
  position: relative;
  overflow: hidden;
  margin: 0 auto 1.5rem;
  background: var(--surface2);
  box-shadow: 0 0 0 4px var(--surface2), 0 0 0 6px rgba(108,142,255,.3);
}

.hero-avatar {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  display: block;
  object-fit: cover;
  object-position: center;
  transition: opacity .25s ease, transform .25s ease;
}

.hero-avatar-hover {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: linear-gradient(135deg, var(--surface2), var(--surface));
  font-family: var(--mono);
  font-size: 4rem;
  font-weight: 700;
  opacity: 0;
  transform: scale(.9);
  transition: opacity .25s ease, transform .25s ease;
}

.hero-avatar-link:hover .hero-avatar,
.hero-avatar-link:focus-visible .hero-avatar {
  opacity: 0;
  transform: scale(1.08);
}

.hero-avatar-link:hover .hero-avatar-hover,
.hero-avatar-link:focus-visible .hero-avatar-hover {
  opacity: 1;
  transform: scale(1);
}

.hero-avatar-link:focus-visible {
  outline: 3px solid var(--accent2);
  outline-offset: 5px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.15;
  background: linear-gradient(135deg, #fff 30%, var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: .5rem;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 500;
  margin-bottom: 1.1rem;
  letter-spacing: .03em;
}

.hero-desc {
  color: var(--muted);
  font-size: 1rem;
  max-width: 520px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: inline-flex;
  gap: .75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .65rem 1.4rem;
  border-radius: 9999px;
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform .18s, box-shadow .18s, opacity .18s;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,142,255,.35);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}

.btn:hover { transform: translateY(-2px); opacity: .92; }

/* ── Sections ─────────────────────────────────── */
section {
  padding: 5rem 1.5rem;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .6rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
  font-size: .97rem;
}

/* ── About ─────────────────────────────────────── */
#about { background: var(--surface); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 640px) { .about-grid { grid-template-columns: 1fr; } }

.about-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.about-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: .6rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.about-card p { color: var(--muted); font-size: .93rem; }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: .75rem;
}

.tag {
  display: inline-block;
  background: rgba(108,142,255,.12);
  color: var(--accent);
  border: 1px solid rgba(108,142,255,.25);
  border-radius: 6px;
  padding: .18rem .65rem;
  font-size: .8rem;
  font-family: var(--mono);
}

/* ── Resume Snapshot ──────────────────────────── */
#resume { background: var(--bg); }

.resume-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.resume-heading .section-desc { margin-bottom: 0; }

.resume-links {
  display: flex;
  gap: .65rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.resume-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: 3.5rem;
  align-items: start;
}

.resume-profile {
  background: linear-gradient(145deg, var(--surface2), rgba(30,36,53,.55));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.resume-kicker {
  display: block;
  color: var(--accent);
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: .7rem;
}

.resume-profile > p {
  color: var(--muted);
  font-size: .93rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.resume-focus {
  border-top: 1px solid var(--border);
  padding: .85rem 0 0;
  margin-top: .85rem;
  display: grid;
  grid-template-columns: 2rem 1fr;
  column-gap: .65rem;
}

.resume-focus span {
  color: var(--accent2);
  font-family: var(--mono);
  font-size: .78rem;
  grid-row: span 2;
  padding-top: .15rem;
}

.resume-focus strong { font-size: .9rem; font-weight: 600; }
.resume-focus small { color: var(--muted); font-size: .8rem; line-height: 1.45; }

.resume-path {
  list-style: none;
  position: relative;
  padding-left: 1.75rem;
}

.resume-path::before {
  content: '';
  position: absolute;
  left: .2rem;
  top: .3rem;
  bottom: .35rem;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2));
}

.resume-path li { position: relative; margin-bottom: 1.55rem; }
.resume-path li:last-child { margin-bottom: 0; }

.resume-path li::before {
  content: '';
  position: absolute;
  left: -1.75rem;
  top: .35rem;
  width: .85rem;
  height: .85rem;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 3px rgba(108,142,255,.12);
}

.resume-period {
  color: var(--accent2);
  font-family: var(--mono);
  font-size: .75rem;
  margin-bottom: .2rem;
}

.resume-path h3 { font-size: 1rem; margin-bottom: .25rem; }
.resume-path p { color: var(--muted); font-size: .86rem; line-height: 1.55; }

.resume-toolkit {
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
  padding-top: 1.35rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}

.resume-toolkit .tag-list { margin-top: 0; }

@media (max-width: 680px) {
  .resume-heading { align-items: flex-start; flex-direction: column; gap: 1rem; }
  .resume-links { justify-content: flex-start; }
  .resume-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .resume-toolkit { align-items: flex-start; flex-direction: column; gap: .7rem; }
}

/* ── Link Cards ────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: .7rem;
  transition: transform .2s, border-color .2s, box-shadow .2s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(108,142,255,.06) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .2s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(108,142,255,.45);
  box-shadow: 0 8px 30px rgba(0,0,0,.4);
}

.card:hover::before { opacity: 1; }

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
}

.card-title {
  font-weight: 700;
  font-size: 1.05rem;
}

.card-desc {
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.55;
  flex: 1;
}

.highlight-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .8rem;
  margin-top: .25rem;
}

.highlight-list li { padding-left: 1.1rem; position: relative; }
.highlight-list li::before {
  content: '✦';
  position: absolute;
  left: 0;
  color: var(--accent);
}
.highlight-list strong { color: var(--text); font-weight: 600; }

.card-link {
  font-size: .8rem;
  color: var(--accent);
  font-family: var(--mono);
  display: flex;
  align-items: center;
  gap: .3rem;
}

/* ── Timeline (science) ───────────────────────── */
#science { background: var(--surface); }

.timeline {
  list-style: none;
  position: relative;
  padding-left: 1.75rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: .3rem;
  bottom: .3rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent2));
  border-radius: 2px;
}

.timeline li {
  position: relative;
  margin-bottom: 2rem;
}

.timeline li::before {
  content: '';
  position: absolute;
  left: -1.75rem;
  top: .45rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-year {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--accent2);
  margin-bottom: .2rem;
}

.timeline-title { font-weight: 600; font-size: .97rem; }
.timeline-venue { color: var(--muted); font-size: .85rem; }

/* ── Footer ───────────────────────────────────── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: .85rem;
}

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

/* ── Utilities ────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

@media (max-width: 480px) {
  nav ul { gap: 1rem; }
  .hero-cta { flex-direction: column; align-items: center; }
}