/* ============================================================
   portfolio.css — shared modern layer over the al-folio theme
   Uses --global-* variables from main.css → dark mode works
   automatically. All classes namespaced .pf- to avoid clashes.
   ============================================================ */

:root {
  --pf-accent: #1e64c8;
  --pf-accent-2: #17b3a6;
  --pf-dyn: #3b82f6;   /* dynamical physics */
  --pf-hyb: #8b5cf6;   /* hybrid physics-ML */
  --pf-ml: #f59e0b;    /* machine learning  */
  --pf-risk: #ef4444;  /* climate risk      */
  --pf-data: #14b8a6;  /* data & software   */
  --pf-radius: 14px;
  --pf-shadow: 0 6px 24px rgba(15, 30, 60, 0.08);
  --pf-shadow-hover: 0 12px 34px rgba(15, 30, 60, 0.16);
}

html[data-theme="dark"] {
  --pf-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  --pf-shadow-hover: 0 12px 34px rgba(0, 0, 0, 0.5);
}

/* ---------- hero ---------- */
.pf-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--pf-radius);
  margin: 1.2rem 0 2.2rem;
  background: linear-gradient(135deg, #071028 0%, #123a6b 55%, #0d5f66 100%);
  color: #fff;
  padding: 4.2rem 2rem 4rem;
  text-align: center;
}
.pf-hero canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.85;
}
.pf-hero-content { position: relative; z-index: 2; max-width: 860px; margin: 0 auto; }
.pf-hero h1 {
  font-weight: 700;
  letter-spacing: 0.01em;
  font-size: 2.6rem;
  margin-bottom: 0.8rem;
  color: #fff;
}
.pf-hero p.pf-tagline {
  font-size: 1.15rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 1.4rem;
}
.pf-hero-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }
.pf-chip {
  display: inline-block;
  padding: 0.32rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff;
  backdrop-filter: blur(4px);
}

/* ---------- section headings ---------- */
.pf-section { margin: 3.2rem 0; }
.pf-section-title {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--global-text-color-light);
  margin-bottom: 0.4rem;
}
.pf-section-heading {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--global-text-color);
  margin-bottom: 1.4rem;
}
.pf-section-heading::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 0.6rem;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--pf-accent), var(--pf-accent-2));
}

/* ---------- stats band ---------- */
.pf-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.pf-stat {
  text-align: center;
  padding: 1.3rem 0.8rem;
  border-radius: var(--pf-radius);
  background: var(--global-card-bg-color, var(--global-bg-color));
  border: 1px solid var(--global-divider-color);
  box-shadow: var(--pf-shadow);
}
.pf-stat-number {
  display: block;
  font-size: 1.9rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--pf-accent), var(--pf-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.pf-stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--global-text-color-light);
  text-transform: uppercase;
  font-weight: 600;
}

/* ---------- pillar / project cards ---------- */
.pf-grid { display: grid; gap: 1.4rem; }
.pf-grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.pf-grid-4 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

.pf-card {
  position: relative;
  border-radius: var(--pf-radius);
  padding: 1.5rem 1.5rem 1.3rem;
  background: var(--global-card-bg-color, var(--global-bg-color));
  border: 1px solid var(--global-divider-color);
  box-shadow: var(--pf-shadow);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
  display: flex;
  flex-direction: column;
}
.pf-card:hover { transform: translateY(-4px); box-shadow: var(--pf-shadow-hover); }
.pf-card h3 {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--global-text-color);
  margin: 0.55rem 0 0.55rem;
  line-height: 1.45;
}
.pf-card p {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--global-text-color);
  opacity: 0.85;
  margin-bottom: 0.8rem;
}
.pf-card-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem;
  color: #fff;
  background: linear-gradient(135deg, var(--pf-accent), var(--pf-accent-2));
  margin-bottom: 0.4rem;
}
.pf-card-links { margin-top: auto; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.pf-card-links a {
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--pf-accent);
  border: 1px solid var(--pf-accent);
  padding: 0.22rem 0.7rem;
  border-radius: 999px;
  transition: background 0.18s ease, color 0.18s ease;
}
.pf-card-links a:hover { background: var(--pf-accent); color: #fff; }

/* tag chips by research type */
.pf-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  margin-right: 0.35rem;
  margin-bottom: 0.2rem;
}
.pf-tag-dyn  { color: var(--pf-dyn);  background: rgba(59, 130, 246, 0.13); }
.pf-tag-hyb  { color: var(--pf-hyb);  background: rgba(139, 92, 246, 0.13); }
.pf-tag-ml   { color: var(--pf-ml);   background: rgba(245, 158, 11, 0.15); }
.pf-tag-risk { color: var(--pf-risk); background: rgba(239, 68, 68, 0.13); }
.pf-tag-data { color: var(--pf-data); background: rgba(20, 184, 166, 0.14); }

.pf-metric {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--pf-accent-2);
  background: rgba(23, 179, 166, 0.12);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  margin: 0 0.3rem 0.35rem 0;
}

/* ---------- physics <-> ML spectrum ---------- */
.pf-spectrum-wrap {
  border-radius: var(--pf-radius);
  border: 1px solid var(--global-divider-color);
  background: var(--global-card-bg-color, var(--global-bg-color));
  box-shadow: var(--pf-shadow);
  padding: 2rem 2rem 1.4rem;
}
.pf-spectrum-track {
  position: relative;
  height: 6px;
  border-radius: 6px;
  margin: 3.4rem 0.4rem 2.6rem;
  background: linear-gradient(90deg, var(--pf-dyn), var(--pf-hyb) 50%, var(--pf-ml));
}
.pf-spectrum-dot {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--global-bg-color);
  border: 4px solid var(--pf-hyb);
  cursor: pointer;
  transition: transform 0.15s ease;
  z-index: 2;
}
.pf-spectrum-dot:hover { transform: translate(-50%, -50%) scale(1.35); }
.pf-spectrum-dot.active {
  transform: translate(-50%, -50%) scale(1.4);
  box-shadow: 0 0 0 6px rgba(139, 92, 246, 0.18);
}
.pf-spectrum-dot[data-type="dyn"] { border-color: var(--pf-dyn); }
.pf-spectrum-dot[data-type="hyb"] { border-color: var(--pf-hyb); }
.pf-spectrum-dot[data-type="ml"]  { border-color: var(--pf-ml); }
.pf-spectrum-ends {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.pf-spectrum-ends .pf-end-left  { color: var(--pf-dyn); }
.pf-spectrum-ends .pf-end-right { color: var(--pf-ml); }
.pf-spectrum-detail {
  margin-top: 1.6rem;
  padding: 1.2rem 1.4rem;
  border-left: 4px solid var(--pf-hyb);
  border-radius: 0 10px 10px 0;
  background: rgba(139, 92, 246, 0.06);
  min-height: 120px;
}
.pf-spectrum-detail h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.4rem; color: var(--global-text-color); }
.pf-spectrum-detail p { font-size: 0.92rem; line-height: 1.6; margin-bottom: 0.5rem; color: var(--global-text-color); opacity: 0.85; }
.pf-spectrum-detail a { font-size: 0.85rem; font-weight: 600; color: var(--pf-accent); }

/* ---------- publications ---------- */
.pf-pub {
  display: flex;
  gap: 1rem;
  padding: 0.85rem 0.2rem;
  border-bottom: 1px solid var(--global-divider-color);
  align-items: baseline;
}
.pf-pub:last-child { border-bottom: none; }
.pf-pub-year {
  flex: 0 0 52px;
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--pf-accent);
}
.pf-pub-body { font-size: 0.93rem; line-height: 1.6; color: var(--global-text-color); }
.pf-pub-body a { color: var(--pf-accent); font-weight: 600; text-decoration: none; }
.pf-pub-body a:hover { text-decoration: underline; }
.pf-pub-venue { font-style: italic; opacity: 0.85; }
.pf-badge-status {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.14rem 0.5rem;
  border-radius: 6px;
  color: var(--pf-hyb);
  background: rgba(139, 92, 246, 0.12);
  margin-left: 0.4rem;
}

/* chart */
.pf-chart-wrap {
  border-radius: var(--pf-radius);
  border: 1px solid var(--global-divider-color);
  background: var(--global-card-bg-color, var(--global-bg-color));
  box-shadow: var(--pf-shadow);
  padding: 1.6rem;
  margin-bottom: 2rem;
}

/* funded projects */
.pf-grant {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  padding: 0.8rem 0.2rem;
  border-bottom: 1px solid var(--global-divider-color);
  font-size: 0.93rem;
  line-height: 1.6;
}
.pf-grant:last-child { border-bottom: none; }
.pf-grant-role {
  flex: 0 0 46px;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.18rem 0;
  border-radius: 6px;
}
.pf-grant-role.pi   { color: #fff; background: linear-gradient(135deg, var(--pf-accent), var(--pf-accent-2)); }
.pf-grant-role.coi  { color: var(--pf-accent); background: rgba(30, 100, 200, 0.12); }

/* home pillars strip */
.pf-mini-pillars { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1rem; }
.pf-mini-pillar {
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--global-divider-color);
  background: var(--global-card-bg-color, var(--global-bg-color));
  box-shadow: var(--pf-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.pf-mini-pillar:hover { transform: translateY(-3px); box-shadow: var(--pf-shadow-hover); }
.pf-mini-pillar .pf-mini-icon { font-size: 1.3rem; margin-bottom: 0.45rem; display: block; }
.pf-mini-pillar h4 { font-size: 0.98rem; font-weight: 700; margin-bottom: 0.35rem; color: var(--global-text-color); }
.pf-mini-pillar p { font-size: 0.85rem; line-height: 1.55; color: var(--global-text-color); opacity: 0.8; margin-bottom: 0; }
a.pf-plain { text-decoration: none; color: inherit; }

/* CTA row */
.pf-cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.2rem; }
.pf-btn {
  display: inline-block;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.55rem 1.25rem;
  border-radius: 999px;
  text-decoration: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.pf-btn:hover { opacity: 0.88; transform: translateY(-1px); text-decoration: none; }
.pf-btn-primary { color: #fff !important; background: linear-gradient(90deg, var(--pf-accent), var(--pf-accent-2)); }
.pf-btn-outline { color: var(--pf-accent) !important; border: 2px solid var(--pf-accent); }

@media (max-width: 576px) {
  .pf-hero { padding: 3rem 1.2rem; }
  .pf-hero h1 { font-size: 2rem; }
  .pf-spectrum-wrap { padding: 1.4rem 1rem 1rem; }
}

/* ---------- v2: skills chips ---------- */
.pf-skillgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.1rem; }
.pf-skillcat {
  border-radius: var(--pf-radius);
  border: 1px solid var(--global-divider-color);
  background: var(--global-card-bg-color, var(--global-bg-color));
  box-shadow: var(--pf-shadow);
  padding: 1.15rem 1.2rem 0.95rem;
}
.pf-skillcat h4 {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
  color: var(--global-text-color-light);
}
.pf-skillcat h4 .pf-skillcat-ico { margin-right: 0.4rem; }
.pf-skill {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.26rem 0.68rem;
  margin: 0 0.3rem 0.42rem 0;
  border-radius: 999px;
  color: var(--global-text-color);
  background: rgba(30, 100, 200, 0.08);
  border: 1px solid rgba(30, 100, 200, 0.22);
  transition: transform 0.15s ease, background 0.15s ease;
}
.pf-skill:hover { transform: translateY(-1px); background: rgba(23, 179, 166, 0.14); border-color: rgba(23, 179, 166, 0.4); }
html[data-theme="dark"] .pf-skill { background: rgba(90, 150, 240, 0.12); border-color: rgba(90, 150, 240, 0.3); }

/* ---------- v2: compact hero for sub-pages ---------- */
.pf-hero-sm { padding: 3rem 1.6rem 2.8rem; }
.pf-hero-sm h1 { font-size: 2.1rem; }
.pf-hero-sm p.pf-tagline { font-size: 1.02rem; margin-bottom: 1rem; }

/* ---------- v2: terminal window (ClimBuntu) ---------- */
.pf-terminal {
  max-width: 640px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--pf-shadow-hover);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.82rem;
  text-align: left;
}
.pf-terminal-bar {
  background: #2d2d3a;
  padding: 0.55rem 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.pf-terminal-bar span { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.pf-terminal-bar .r { background: #ff5f57; } .pf-terminal-bar .y { background: #febc2e; } .pf-terminal-bar .g { background: #28c840; }
.pf-terminal-bar em { font-style: normal; color: #9aa0b0; font-size: 0.72rem; margin-left: 0.6rem; }
.pf-terminal-body { background: #14141d; color: #d6e2f0; padding: 1rem 1.1rem 1.2rem; line-height: 1.85; }
.pf-terminal-body .p  { color: #28c840; font-weight: 700; }
.pf-terminal-body .c  { color: #7f8ea3; }
.pf-terminal-body .k  { color: #66c7ff; }
.pf-terminal-body .ok { color: #ffd479; }
.pf-cursor { display: inline-block; width: 8px; height: 14px; background: #d6e2f0; vertical-align: middle; animation: pf-blink 1.1s steps(1) infinite; }
@keyframes pf-blink { 50% { opacity: 0; } }

/* ---------- v2: wave divider ---------- */
.pf-wave { display: block; width: 100%; height: 46px; margin: -0.4rem 0 1.6rem; }
.pf-wave path { fill: rgba(30, 100, 200, 0.10); }
html[data-theme="dark"] .pf-wave path { fill: rgba(90, 150, 240, 0.10); }

/* ---------- v2: feature list cards (ClimBuntu) ---------- */
.pf-feature {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--global-divider-color);
  background: var(--global-card-bg-color, var(--global-bg-color));
  box-shadow: var(--pf-shadow);
  font-size: 0.92rem;
  line-height: 1.55;
}
.pf-feature .pf-feature-ico { font-size: 1.25rem; line-height: 1.2; }

/* ---------- v2: collapsible publications ---------- */
.pf-pub-collapse { display: none; }
.pf-pub-collapse.is-expanded { display: block; }
.pf-pub-collapse h4, .pf-publist h4 { font-weight: 700; margin: 1.6rem 0 0.4rem; font-size: 1.05rem; color: var(--global-text-color); }

/* ============================================================
   v3: UNIFIED NAVBAR — identical on every page, overrides any
   page-local CSS (blog styles.css / style1.css). High specificity.
   ============================================================ */
#navbar.navbar {
  background: var(--global-bg-color, #fff) !important;
  box-shadow: 0 2px 10px rgba(15, 30, 60, 0.06);
  min-height: 56px;
  padding: 0.4rem 0 !important;
}
#navbar.navbar .container { width: 100% !important; max-width: 1140px; margin: 0 auto; }
#navbar.navbar .navbar-brand {
  font-size: 1.15rem !important;
  font-weight: 700 !important;
  color: var(--global-text-color) !important;
  padding: 0;
}
#navbar.navbar .navbar-nav { align-items: center; }
#navbar.navbar .nav-item { display: inline-block; }
#navbar.navbar .nav-link {
  color: var(--global-text-color) !important;
  font-size: 0.95rem !important;
  font-weight: 500;
  padding: 0.35rem 0.85rem !important;
  text-decoration: none !important;
  transition: color 0.18s ease;
}
#navbar.navbar .nav-link:hover { color: var(--pf-accent) !important; }
#navbar.navbar .nav-item.active .nav-link { color: var(--pf-accent) !important; font-weight: 700; }
/* blog Log-in button sits inline, consistent spacing */
#navbar.navbar .nav-button { margin-left: 0.6rem; }

/* clear the fixed navbar on every page's first content */
body.fixed-top-nav { padding-top: 56px; }

/* ---------- v3: two-column home row (skills | pillars) ---------- */
.pf-tworow { display: grid; grid-template-columns: 1.15fr 1fr; gap: 2rem; align-items: start; }
@media (max-width: 900px) { .pf-tworow { grid-template-columns: 1fr; gap: 2.4rem; } }

/* compact skills variant */
.pf-skillgrid.pf-compact { grid-template-columns: 1fr; gap: 0.7rem; }
.pf-skillgrid.pf-compact .pf-skillcat { padding: 0.85rem 1rem 0.6rem; }
.pf-skillgrid.pf-compact .pf-skillcat h4 { margin-bottom: 0.5rem; font-size: 0.72rem; }
.pf-skillgrid.pf-compact .pf-skill { font-size: 0.74rem; padding: 0.2rem 0.55rem; margin: 0 0.25rem 0.32rem 0; }

/* pillars stack tighter in the right column */
.pf-pillars-stack .pf-mini-pillar { margin-bottom: 0; }
.pf-pillars-stack { display: grid; grid-template-columns: 1fr; gap: 0.8rem; }
@media (min-width: 480px) and (max-width: 900px) { .pf-pillars-stack { grid-template-columns: 1fr 1fr; } }