@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

/* Minimal, dependency-free portfolio styles (light/dark). */

:root {
  --bg: #f7f9ff;
  --bg2: #eef4ff;
  --card: rgba(247, 249, 255, 0.86);
  --card2: rgba(247, 249, 255, 0.94);
  --text: rgba(10, 25, 54, 0.92);
  --muted: rgba(10, 25, 54, 0.72);
  --border: rgba(10, 25, 54, 0.14);
  --shadow: rgba(0, 0, 0, 0.12);

  /* Royal blue accent (premium, subtle hover shifts). */
  --accent: #1d4ed8;
  --accent2: #3b82f6;
  --accentHover: #1e40af;
  --accentTint: rgba(29, 78, 216, 0.12);
  --accentBorder: rgba(29, 78, 216, 0.42);
  --accentRing: rgba(29, 78, 216, 0.30);
  --accentText: #ffffff;

  --radius: 16px;
  --radiusSm: 12px;
  --maxw: 1100px;
  --pad: 20px;

  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #090d16;
  --bg2: #0f172a;
  --card: rgba(15, 23, 42, 0.65);
  --card2: rgba(30, 41, 59, 0.80);
  --text: rgba(241, 245, 249, 0.95);
  --muted: rgba(148, 163, 184, 0.80);
  --border: rgba(255, 255, 255, 0.08);
  --shadow: rgba(0, 0, 0, 0.4);

  --accent: #3b82f6;
  --accent2: #60a5fa;
  --accentHover: #2563eb;
  --accentTint: rgba(59, 130, 246, 0.15);
  --accentBorder: rgba(59, 130, 246, 0.40);
  --accentRing: rgba(59, 130, 246, 0.35);
  --accentText: #ffffff;

  color-scheme: dark;
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.hero,
main {
  width: 100%;
}

main {
  flex: 1 0 auto;
  padding-bottom: 72px;
}

/* Put accent gradients on a fixed layer to avoid visible band seams across cards. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 900px at 20% 10%, rgba(45, 108, 255, 0.22), transparent 62%),
    radial-gradient(900px 800px at 80% 20%, rgba(0, 167, 181, 0.16), transparent 60%),
    radial-gradient(900px 700px at 20% 85%, rgba(45, 108, 255, 0.10), transparent 62%);
  transition: background 0.3s ease;
}

[data-theme="dark"] body::before {
  background:
    radial-gradient(1200px 900px at 20% 10%, rgba(37, 99, 235, 0.12), transparent 62%),
    radial-gradient(900px 800px at 80% 20%, rgba(13, 148, 136, 0.08), transparent 60%),
    radial-gradient(900px 700px at 20% 85%, rgba(37, 99, 235, 0.06), transparent 62%);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* Theme toggle helper classes */
.theme-toggle {
  font-size: 1.1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
}
.theme-toggle:hover {
  transform: scale(1.1) rotate(15deg);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--text);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: 12px;
  z-index: 9999;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

.container {
  max-width: var(--maxw);
  padding: 0 var(--pad);
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter: blur(10px);
  transition: background-color 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  transition: transform 180ms ease, opacity 180ms ease;
}
.brand:hover {
  transform: translateY(-1px);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-size: 0.95rem;
}
.brand-text span {
  font-size: 0.80rem;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--muted);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--card);
  border-color: var(--border);
  transform: translateY(-1px);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  box-shadow: 0 10px 30px var(--shadow);
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}
.btn:hover {
  background: var(--accentTint);
  border-color: var(--accentBorder);
  color: var(--accentHover);
  box-shadow: 0 14px 38px var(--shadow), 0 0 0 5px color-mix(in srgb, var(--accentTint) 60%, transparent);
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-color: transparent;
  color: var(--accentText);
}
.btn.primary:hover {
  background: linear-gradient(135deg, var(--accentHover), var(--accent2));
}
.btn.ghost {
  background: transparent;
  box-shadow: none;
}

.btn.white {
  background: #ffffff;
  border-color: var(--border);
  color: var(--accentHover);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 10px 30px var(--shadow), 0 0 0 4px var(--accentRing);
  border-color: var(--accentBorder);
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.icon-btn:hover {
  background: var(--card2);
  transform: translateY(-1px);
  border-color: var(--accentBorder);
  box-shadow: 0 14px 38px var(--shadow), 0 0 0 5px color-mix(in srgb, var(--accentTint) 60%, transparent);
}

/* Navbar-only subtle lift for actions. */
.nav .btn:hover {
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
}

.mobile-menu {
  display: none;
  border-top: 1px solid var(--border);
  padding: 8px 0 14px;
}
.mobile-menu a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 10px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--muted);
}
.mobile-menu a:hover {
  background: var(--card);
  color: var(--text);
}

header.hero {
  padding: 52px 0 30px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 26px;
  align-items: center;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2.0rem, 3.5vw, 3.0rem);
  letter-spacing: -0.02em;
}

.hero .subtitle {
  color: var(--muted);
  font-weight: 600;
  margin: 0 0 14px;
}

.hero .desc {
  color: var(--muted);
  margin: 0 0 18px;
  max-width: 64ch;
}

.hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 16px 0 0;
}

.hero-card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 18px 44px var(--shadow);
  backdrop-filter: blur(10px);
}

.hero-portrait {
  display: grid;
  gap: 12px;
}

.hero-portrait img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  object-position: center 50%;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 44px var(--shadow);
}

.hero-portrait .meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hero-portrait .meta strong {
  font-size: 0.98rem;
}
.hero-portrait .meta span {
  color: var(--muted);
  font-size: 0.88rem;
}

.highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.pill {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radiusSm);
  padding: 10px 12px;
  font-weight: 700;
  font-size: 0.90rem;
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease,
    color 180ms ease;
}
.pill span {
  display: block;
  font-weight: 600;
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 2px;
}

.pill:hover {
  background: var(--card2);
  border-color: var(--accentBorder);
  transform: translateY(-2px);
  box-shadow: 0 18px 48px var(--shadow), 0 0 0 5px color-mix(in srgb, var(--accentTint) 60%, transparent);
}

section {
  padding: 42px 0;
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 420ms ease, transform 420ms ease;
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 18px;
  align-items: start;
}

.about-copy {
  height: 100%;
}

.about-copy p + p {
  margin-top: 14px;
}

.intro-video-card {
  overflow: hidden;
}

.intro-video-head {
  margin-bottom: 14px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  margin-bottom: 10px;
  border-radius: 999px;
  border: 1px solid var(--accentBorder);
  background: var(--accentTint);
  color: var(--accentHover);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.intro-video-head h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.intro-video-head p {
  color: var(--muted);
}

.intro-video-frame {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--accentTint) 85%, transparent), transparent 52%),
    linear-gradient(180deg, color-mix(in srgb, var(--card2) 92%, transparent), color-mix(in srgb, var(--card) 96%, transparent));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.intro-video-frame iframe,
.intro-video-frame video {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #000;
}

.intro-video-note {
  margin-top: 12px;
  font-size: 0.92rem;
  color: var(--muted);
}

.card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 16px 40px var(--shadow);
  backdrop-filter: blur(10px);
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}
.card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}
.card p {
  margin: 0;
  color: var(--muted);
}
.card:hover {
  background: var(--card2);
  border-color: var(--accentBorder);
  transform: translateY(-2px);
  box-shadow: 0 22px 58px var(--shadow), 0 0 0 5px color-mix(in srgb, var(--accentTint) 60%, transparent);
}
.card:focus-within {
  border-color: var(--accentBorder);
  box-shadow: 0 16px 40px var(--shadow), 0 0 0 4px var(--accentRing);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.badge {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 60%, transparent);
  color: var(--muted);
  font-weight: 700;
  font-size: 0.82rem;
}

.project-card {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 14px;
  align-items: start;
}
.project-card img {
  width: 160px;
  height: 110px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card2);
}
.project-card h3 {
  margin: 0 0 6px;
}
.project-meta {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.90rem;
}
.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.tag-label,
.filter-label,
.project-domain {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.project-filter-panel {
  display: grid;
  gap: 18px;
  padding: 18px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.project-search {
  display: grid;
  gap: 8px;
}

.project-search label {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.project-search input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card2);
  color: var(--text);
  font: inherit;
  outline: none;
}

.project-search input:focus {
  border-color: rgba(37, 99, 235, 0.55);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.filter-label {
  min-width: 94px;
}

.filter-chip {
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 12px;
  background: var(--card2);
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 800;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.filter-chip:hover {
  transform: translateY(-1px);
  border-color: rgba(37, 99, 235, 0.4);
  color: var(--text);
}

.filter-chip.is-active {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
}

.project-filter-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 4px;
}

.project-count {
  color: var(--muted);
  font-weight: 800;
}

.project-directory {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.project-directory-card {
  display: flex;
  flex-direction: column;
}

.project-directory-card[hidden] {
  display: none;
}

.project-directory-card h3 {
  margin: 10px 0 8px;
}

.project-directory-card p {
  margin-bottom: 2px;
}

.project-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.project-directory-card .project-actions {
  margin-top: auto;
  padding-top: 14px;
}

.project-empty {
  margin-top: 18px;
  padding: 18px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
  font-weight: 800;
}

.case-metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric-card span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  line-height: 1.1;
}

.metric-card p {
  margin-top: 8px;
}

.sentiment-bars {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.sentiment-row {
  display: grid;
  grid-template-columns: minmax(130px, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.sentiment-row div {
  display: grid;
  gap: 2px;
}

.sentiment-row strong {
  text-transform: capitalize;
}

.sentiment-row span {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 750;
}

.sentiment-row > span {
  color: var(--text);
}

.sentiment-row i {
  grid-column: 1 / -1;
  display: block;
  height: 10px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, var(--accent), var(--accent2)) 0 0 / var(--bar) 100% no-repeat,
    color-mix(in srgb, var(--card2) 82%, transparent);
  border: 1px solid var(--border);
}

.lexicon-chart {
  position: relative;
  min-height: 280px;
  margin-top: 18px;
  padding: 12px 12px 34px 42px;
  border: 1px solid var(--border);
  border-radius: var(--radiusSm);
  background: color-mix(in srgb, var(--card2) 82%, transparent);
}

.lexicon-plot {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: end;
  gap: 14px;
  height: 220px;
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 10px 10px 0;
}

.lexicon-bar {
  display: flex;
  min-height: 34px;
  height: var(--bar);
  flex-direction: column;
  justify-content: flex-end;
  gap: 4px;
  padding: 10px 8px;
  border-radius: 10px 10px 0 0;
  background: linear-gradient(180deg, var(--accent2), var(--accent));
  color: #fff;
  text-align: center;
}

.lexicon-bar span,
.lexicon-bar strong {
  line-height: 1.1;
}

.lexicon-bar span {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: capitalize;
}

.chart-axis {
  position: absolute;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.x-axis {
  left: 42px;
  right: 12px;
  bottom: 9px;
  text-align: center;
}

.y-axis {
  left: 10px;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: center;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

.case-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.case-table th,
.case-table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

.case-table th {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.case-table td {
  color: var(--muted);
  font-weight: 650;
}

.case-table td:first-child {
  color: var(--text);
  font-weight: 850;
}

.timeline {
  display: grid;
  gap: 12px;
}
.timeline .item {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 12px;
}
.timeline .dot {
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 10px 26px var(--shadow);
}
.timeline .content {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 16px;
  backdrop-filter: blur(10px);
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}
.timeline .content:hover {
  background: var(--card2);
  border-color: var(--accentBorder);
  transform: translateY(-2px);
  box-shadow: 0 22px 58px var(--shadow), 0 0 0 5px color-mix(in srgb, var(--accentTint) 60%, transparent);
}
.timeline .content:focus-within {
  border-color: var(--accentBorder);
  box-shadow: 0 16px 40px var(--shadow), 0 0 0 4px var(--accentRing);
}
.timeline .content strong {
  display: block;
  margin-bottom: 2px;
}
.timeline .content .when {
  color: var(--muted);
  font-weight: 700;
  font-size: 0.88rem;
}
.timeline .content ul {
  margin: 10px 0 0 18px;
  color: var(--muted);
}

.exp-subrole {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed color-mix(in srgb, var(--border) 80%, transparent);
}
.exp-subrole-title {
  font-weight: 800;
}
.exp-subrole-when {
  margin-top: 2px;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.88rem;
}
.exp-subrole ul {
  margin: 10px 0 0 18px;
  color: var(--muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 14px;
}

.cert-carousel {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 1fr);
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.cert-card {
  scroll-snap-align: start;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cert-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card2);
}

.cert-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cert-meta strong {
  font-size: 1.02rem;
}

.cert-meta span {
  color: var(--muted);
  font-weight: 650;
  font-size: 0.90rem;
}

.cert-thumb {
  width: 100%;
  height: 170px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent) 18%, white),
    color-mix(in srgb, var(--accent2) 18%, white)
  );
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.cert-thumb-title {
  font-weight: 900;
  letter-spacing: 0.02em;
}

.cert-thumb-score {
  font-size: 2.1rem;
  font-weight: 950;
  color: var(--accentHover);
  line-height: 1.1;
  margin-top: 2px;
}

.cert-thumb-sub {
  margin-top: 6px;
  font-weight: 750;
  color: var(--muted);
  font-size: 0.90rem;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: 0 16px 40px var(--shadow);
  text-decoration: none;
}
.back-to-top:hover {
  background: var(--card2);
}
.back-to-top img {
  width: 22px;
  height: 22px;
  display: block;
  object-fit: contain;
}

.back-to-top.floating {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 60;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}
.back-to-top.floating[data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .project-directory {
    grid-template-columns: 1fr;
  }
  .case-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .filter-label {
    width: 100%;
  }
  .project-card {
    grid-template-columns: 1fr;
  }
  .project-card img {
    width: 100%;
    height: 160px;
  }

  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: inline-flex;
  }
  .mobile-menu[data-open="true"] {
    display: block;
  }
}

@media (max-width: 560px) {
  .case-metric-grid {
    grid-template-columns: 1fr;
  }
  .lexicon-plot {
    gap: 8px;
  }
  .lexicon-bar {
    padding: 8px 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}
  .hero-portrait img {
    height: 240px;
  }