@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #0f1520;
  --bg-card: #131c2e;
  --bg-card-hover: #172236;
  --accent-blue: #4a9eff;
  --accent-glow: #1a6bcc;
  --text-primary: #e8eaf0;
  --text-secondary: #8892a4;
  --text-muted: #4a5568;
  --border: #1e2d45;
  --border-hover: #2a4060;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --font-heading: 'DM Serif Display', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --field-engineering: #4a9eff;
  --field-science: #a78bfa;
  --field-operations: #34d399;
  --field-data: #fbbf24;
  --field-business: #f97316;
  --field-policy: #f472b6;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* ─── Stars canvas ─────────────────────────────── */
#stars-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ─── Nav ─────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  background: rgba(10, 13, 20, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.home-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s;
  white-space: nowrap;
}
.home-link:hover { color: var(--accent-blue); }

.nav-title {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-align: center;
  letter-spacing: 0.03em;
}

.mobile-filter-btn {
  display: none;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-family: var(--font-body);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}
.mobile-filter-btn:hover { color: var(--text-primary); border-color: var(--accent-blue); }

/* ─── Hero ─────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 64px 24px 40px;
  background: linear-gradient(180deg, rgba(74,158,255,0.06) 0%, transparent 100%);
}

.hero-content { max-width: 720px; margin: 0 auto; }

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.2rem);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* ─── Mode Toggle ──────────────────────────────── */
.mode-toggle {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
  transition: all 0.25s;
  min-width: 200px;
  position: relative;
  overflow: hidden;
}

.mode-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(74,158,255,0.08), transparent);
  opacity: 0;
  transition: opacity 0.25s;
}

.mode-btn:hover::before { opacity: 1; }
.mode-btn:hover { border-color: var(--accent-blue); transform: translateY(-2px); }

.mode-btn.active {
  border-color: var(--accent-blue);
  background: rgba(74,158,255,0.1);
  box-shadow: 0 0 24px rgba(74,158,255,0.15);
}
.mode-btn.active::before { opacity: 1; }

.mode-icon { font-size: 1.4rem; margin-bottom: 2px; }
.mode-label { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); }
.mode-sub { font-size: 0.78rem; color: var(--text-secondary); font-family: var(--font-mono); }

/* ─── Degree Picker ────────────────────────────── */
.degree-picker-section {
  position: relative;
  z-index: 1;
  padding: 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}

.degree-picker-section.hidden {
  display: none;
}

.degree-picker-inner { max-width: 1200px; margin: 0 auto; }

.degree-picker-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.degree-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.degree-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  padding: 7px 14px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.degree-btn:hover { border-color: var(--accent-blue); color: var(--text-primary); }
.degree-btn.active {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #fff;
  font-weight: 500;
}

/* ─── Main layout ──────────────────────────────── */
.main-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  max-width: 1400px;
  margin: 0 auto;
  min-height: 60vh;
}

/* ─── Filter Sidebar ───────────────────────────── */
.filter-sidebar {
  padding: 20px 16px;
  border-right: 1px solid var(--border);
  background: var(--bg-secondary);
  position: sticky;
  top: 49px;
  height: calc(100vh - 49px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.filter-sidebar::-webkit-scrollbar { width: 4px; }
.filter-sidebar::-webkit-scrollbar-track { background: transparent; }
.filter-sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.filter-sidebar-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}

.filter-sidebar-title {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  flex: 1;
}

.clear-filters-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.2s;
}
.clear-filters-btn:hover { color: var(--accent-blue); }

.sidebar-close-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 2px 6px;
  transition: color 0.2s;
}
.sidebar-close-btn:hover { color: var(--text-primary); }

.filter-group {
  margin-bottom: 22px;
}

.filter-label {
  display: block;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.search-wrapper {
  position: relative;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: var(--font-body);
  padding: 9px 12px 9px 34px;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s;
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus { border-color: var(--accent-blue); }

.filter-options {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.filter-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.84rem;
  color: var(--text-secondary);
  transition: all 0.15s;
  user-select: none;
}
.filter-chip:hover { background: rgba(255,255,255,0.04); color: var(--text-primary); }
.filter-chip input { accent-color: var(--accent-blue); cursor: pointer; }
.filter-chip:has(input:checked) {
  color: var(--text-primary);
  background: rgba(74,158,255,0.08);
}

/* ─── Cards Area ───────────────────────────────── */
.cards-area {
  padding: 20px 24px;
  background: var(--bg-primary);
}

.cards-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  gap: 12px;
  flex-wrap: wrap;
}

.results-count {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.results-count strong { color: var(--text-secondary); }

.sort-select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  padding: 6px 10px;
  border-radius: 6px;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
}
.sort-select:focus { border-color: var(--accent-blue); }

/* ─── Cards Grid ───────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

/* ─── Card ─────────────────────────────────────── */
.role-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.role-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--field-color, var(--accent-blue));
  opacity: 0.6;
  transition: opacity 0.25s;
}

.role-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.role-card:hover::before { opacity: 1; }

.role-card.dim {
  opacity: 0.3;
  transform: none;
}

.role-card.highlight {
  border-color: var(--field-color, var(--accent-blue));
  box-shadow: 0 0 18px rgba(74,158,255,0.12);
}
.role-card.highlight::before { opacity: 1; }

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  flex: 1;
}

.card-edu-badge {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.04em;
}

.card-description {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 2px;
}

.field-badge {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  padding: 3px 8px;
  border-radius: 20px;
  border: 1px solid;
  letter-spacing: 0.03em;
  font-weight: 500;
}

.org-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.card-salary {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.card-arrow {
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: transform 0.2s, color 0.2s;
}
.role-card:hover .card-arrow {
  transform: translateX(4px);
  color: var(--accent-blue);
}

/* Field badge colours */
.field-engineering { color: var(--field-engineering); border-color: rgba(74,158,255,0.4); }
.field-science { color: var(--field-science); border-color: rgba(167,139,250,0.4); }
.field-operations { color: var(--field-operations); border-color: rgba(52,211,153,0.4); }
.field-data { color: var(--field-data); border-color: rgba(251,191,36,0.4); }
.field-business { color: var(--field-business); border-color: rgba(249,115,22,0.4); }
.field-policy { color: var(--field-policy); border-color: rgba(244,114,182,0.4); }

/* Card field left-border colours */
.card-field-engineering { --field-color: var(--field-engineering); }
.card-field-science { --field-color: var(--field-science); }
.card-field-operations { --field-color: var(--field-operations); }
.card-field-data { --field-color: var(--field-data); }
.card-field-business { --field-color: var(--field-business); }
.card-field-policy { --field-color: var(--field-policy); }

/* ─── Empty state ──────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 80px 24px;
  color: var(--text-muted);
  text-align: center;
}
.empty-icon { font-size: 3rem; }
.btn-outline {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-family: var(--font-body);
  padding: 8px 18px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-outline:hover { border-color: var(--accent-blue); color: var(--accent-blue); }

/* ─── Sidebar overlay (mobile) ─────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 199;
}

/* ─── Modal ────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 300;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.modal-overlay[hidden] { display: none; }

.modal {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 720px;
  margin: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
  animation: modal-in 0.25s ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.97) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  background: rgba(255,255,255,0.06);
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
  z-index: 1;
}
.modal-close:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); }

.modal-content { padding: 28px 28px 32px; }

/* Modal header */
.modal-header { margin-bottom: 20px; }

.modal-field-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
  display: block;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 12px;
}

.modal-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }

.modal-description {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Modal sections */
.modal-section { margin-top: 24px; }

.modal-section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* Education path timeline */
.edu-timeline {
  position: relative;
  padding-left: 20px;
}

.edu-timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--field-color, var(--accent-blue)), transparent);
  opacity: 0.4;
}

.timeline-step {
  position: relative;
  padding: 0 0 18px 20px;
}
.timeline-step:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -14px;
  top: 5px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--field-color, var(--accent-blue));
  border: 2px solid var(--bg-secondary);
  box-shadow: 0 0 8px var(--field-color, var(--accent-blue));
}

.timeline-stage {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
  margin-bottom: 1px;
}

.timeline-duration {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.timeline-detail {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Skills */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
}

/* Salary & meta row */
.modal-meta-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 16px;
  background: var(--bg-card);
  border-radius: 10px;
  border: 1px solid var(--border);
}

.meta-item { display: flex; flex-direction: column; gap: 3px; }
.meta-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--text-muted); letter-spacing: 0.06em; text-transform: uppercase; }
.meta-value { font-size: 0.88rem; color: var(--text-primary); font-weight: 500; }

/* Example roles */
.example-roles-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.example-role-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s;
}
.example-role-link:hover {
  border-color: var(--accent-blue);
  background: rgba(74,158,255,0.06);
}

.example-role-org {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}
.example-role-title {
  font-size: 0.85rem;
  color: var(--text-primary);
}
.example-role-arrow {
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: transform 0.2s;
}
.example-role-link:hover .example-role-arrow { transform: translateX(3px); color: var(--accent-blue); }

/* Education notes box */
.edu-notes-box {
  padding: 12px 14px;
  background: rgba(74,158,255,0.05);
  border: 1px solid rgba(74,158,255,0.2);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Related roles */
.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.related-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-family: var(--font-body);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.related-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* ─── Footer ───────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 28px 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
}
.site-footer a { color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.site-footer a:hover { color: var(--accent-blue); }

/* ─── Responsive ───────────────────────────────── */
@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
  }

  .filter-sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 280px;
    height: 100%;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    border-right: 1px solid var(--border);
    border-radius: 0;
    padding-top: 20px;
  }
  .filter-sidebar.open {
    transform: translateX(0);
  }

  .sidebar-close-btn { display: flex; align-items: center; justify-content: center; }
  .sidebar-overlay.visible { display: block; }

  .mobile-filter-btn { display: flex; }

  .cards-area { padding: 16px; }
}

@media (max-width: 600px) {
  .hero { padding: 40px 16px 28px; }
  .hero-title { font-size: 1.8rem; }
  .hero-subtitle { font-size: 0.92rem; }
  .mode-toggle { flex-direction: column; align-items: stretch; }
  .mode-btn { min-width: unset; }
  .degree-picker-section { padding: 16px; }
  .cards-grid { grid-template-columns: 1fr; }
  .modal-content { padding: 20px 18px 24px; }
  .modal-title { font-size: 1.3rem; }
  .modal-overlay { padding: 12px; }
  .modal-meta-row { gap: 12px; }
}