:root {
  --bg: #07111d;
  --bg-soft: #0d1b2a;
  --bg-card: rgba(14, 23, 35, 0.82);
  --panel: #122338;
  --panel-strong: #183253;
  --text: #ecf3ff;
  --muted: #b5c5dc;
  --primary: #7aa2ff;
  --primary-strong: #a4c1ff;
  --accent: #5fe0bd;
  --accent-warm: #ffd166;
  --line: rgba(255, 255, 255, 0.09);
  --shadow: 0 30px 70px rgba(2, 8, 18, 0.58);
  --shadow-soft: 0 16px 36px rgba(7, 17, 29, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

section[id] {
  scroll-margin-top: 100px;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(122, 162, 255, 0.22), transparent 30%),
    radial-gradient(circle at bottom right, rgba(95, 224, 189, 0.16), transparent 26%),
    linear-gradient(180deg, #070d17 0%, #091521 32%, #07111d 100%);
  color: var(--text);
  line-height: 1.7;
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black 15%, transparent 90%);
  pointer-events: none;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(11, 16, 32, 0.72);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(2, 8, 18, 0.18);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 1rem;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.header-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 2px solid rgba(122, 162, 255, 0.7);
  background: #dfe5eb;
  box-shadow: 0 8px 20px rgba(122, 162, 255, 0.22);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.header-avatar.is-hidden {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.05em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--muted);
}

.main-nav a {
  transition: color 0.25s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.45rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #091321;
  box-shadow: 0 18px 40px rgba(124, 156, 255, 0.35);
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 0 22px 48px rgba(124, 156, 255, 0.45);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: rgba(122, 162, 255, 0.55);
  box-shadow: var(--shadow-soft);
}

.hero {
  padding: 5.5rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: 2.5rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  font-weight: 700;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.5rem, 3.5vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
  max-width: 820px;
  text-wrap: balance;
  background: linear-gradient(180deg, #f8fbff 0%, #bed2ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin-top: 1.3rem;
  max-width: 700px;
  color: var(--muted);
  font-size: 1.08rem;
  font-weight: 500;
  line-height: 1.65;
}

.hero-credential {
  margin: 0.7rem 0 0;
  color: var(--accent);
  font-weight: 600;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.7rem;
}

.badge-row span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.58rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(122, 162, 255, 0.22);
  background: rgba(255, 255, 255, 0.02);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.impact-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.impact-strip div {
  background: linear-gradient(180deg, rgba(18, 35, 56, 0.9), rgba(10, 18, 30, 0.9));
  border: 1px solid rgba(122, 162, 255, 0.2);
  border-radius: 18px;
  padding: 0.85rem 0.75rem;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.impact-strip strong {
  font-size: clamp(1.2rem, 1.7vw, 1.8rem);
  color: var(--accent-warm);
  letter-spacing: -0.05em;
}

.impact-strip span {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.35;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-panel {
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.96), rgba(11, 18, 30, 0.92));
  border: 1px solid rgba(122, 162, 255, 0.24);
  border-radius: 28px;
  padding: 0.8rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: visible;
  display: block;
}

.status-pill {
  position: relative;
  z-index: 1;
  display: inline-flex;
  margin-bottom: 1rem;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: rgba(95, 224, 189, 0.12);
  border: 1px solid rgba(95, 224, 189, 0.22);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(122, 162, 255, 0.12), transparent 50%, rgba(95, 224, 189, 0.08));
  pointer-events: none;
}

.profile-photo-wrap {
  position: relative;
  z-index: 1;
  margin: 0;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(122, 162, 255, 0.22);
  background: #dfe5eb;
  box-shadow: 0 18px 40px rgba(7, 17, 29, 0.22);
}

.profile-photo {
  width: 100%;
  aspect-ratio: 0.82 / 1;
  object-fit: cover;
  object-position: center center;
  display: block;
  background: #dfe5eb;
  filter: saturate(0.92) contrast(1.02);
}

.profile-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0.2rem 0.9rem;
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 1;
}

.avatar {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: #08121f;
  font-weight: 800;
  font-size: 1.5rem;
  box-shadow: 0 18px 40px rgba(95, 224, 189, 0.2);
}

.profile-text h2 {
  margin: 0;
  font-size: 1.4rem;
}

.profile-text p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.mini-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  padding: 0.8rem 0 0.9rem;
  position: relative;
  z-index: 1;
}

.mini-stats div {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  border: 1px solid rgba(122, 162, 255, 0.16);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.02);
  padding: 0.9rem 0.7rem;
}

.mini-stats strong {
  font-size: 1.2rem;
}

.mini-stats span,
.label {
  color: var(--muted);
  font-size: 0.8rem;
}

.profile-detail {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line);
  position: relative;
  z-index: 1;
}

.credential-card {
  position: absolute;
  z-index: 2;
  left: -1.5rem;
  bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-width: 270px;
  padding: 1rem 1.15rem;
  border: 1px solid rgba(122, 162, 255, 0.3);
  border-radius: 16px;
  background: #101b2a;
  box-shadow: var(--shadow);
}

.credential-card strong { color: var(--text); }
.credential-card span { color: var(--muted); font-size: 0.85rem; }
.credential-card .credential-label { color: var(--accent); font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }

.credential-grid .skill-box { display: flex; flex-direction: column; align-items: flex-start; gap: 0.55rem; }
.credential-grid .skill-box p { margin: 0; }
.credential-grid .skill-box a, .profile-proof-card .proof-link, .recommendation-card a { color: var(--accent); font-weight: 700; }
.credential-grid .skill-box small { color: var(--muted); font-size: 0.8rem; }
.profile-proof-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 1.25rem; }
.profile-proof-card { display: flex; flex-direction: column; align-items: flex-start; gap: 0.65rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,0.025); color: var(--text); }
.profile-proof-card > span:not(.project-tag) { color: var(--muted); }
.recommendation-card { max-width: 980px; margin: 1.25rem auto 0; padding: 1.5rem; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,0.025); }
.recommendation-card blockquote { margin: 0.75rem 0; color: var(--text); font-size: 1.15rem; line-height: 1.6; }
.recommendation-card > p:last-of-type { color: var(--muted); }

.hero-actions { align-items: center; gap: 0.8rem; margin-top: 1.4rem; }
.hero-social { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--muted); font-size: 0.9rem; font-weight: 600; }
.hero-social:hover, .hero-social:focus-visible { color: var(--accent); }

.section {
  padding: 5rem 0;
  position: relative;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 2rem;
}

.section-heading {
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
  width: fit-content;
  max-width: 100%;
}

.section-heading::after {
  content: "";
  display: block;
  width: 88px;
  height: 4px;
  margin-top: 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  box-shadow: 0 0 18px rgba(122, 162, 255, 0.6);
}

.section-heading h2 {
  margin: 0;
  display: block;
  width: fit-content;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.05em;
  text-shadow: 0 10px 25px rgba(122, 162, 255, 0.08);
}

.centered {
  text-align: left;
}

.centered .section-heading {
  display: inline-block;
  margin-left: 0;
  margin-right: 0;
}

.centered .section-heading::after {
  margin-left: 0;
  margin-right: 0;
}

.about-content {
  color: var(--muted);
  font-size: 1.05rem;
}

.summary-points {
  margin: 1.5rem 0 0;
  padding-left: 1.1rem;
  color: var(--text);
  display: grid;
  gap: 0.8rem;
}

.summary-points li::marker {
  color: var(--accent);
}

.value-list {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.value-list div {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 0.9rem;
  align-items: start;
  padding: 1rem 1rem 1rem 0.8rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
}

.value-list span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(122, 162, 255, 0.18), rgba(95, 224, 189, 0.12));
  color: var(--accent-warm);
  font-weight: 800;
}

.value-list p {
  margin: 0;
  color: var(--muted);
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.focus-card {
  background: linear-gradient(180deg, rgba(18, 35, 56, 0.82), rgba(12, 19, 31, 0.82));
  border: 1px solid rgba(122, 162, 255, 0.2);
  border-radius: 22px;
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.focus-card h3 {
  margin-top: 0.9rem;
  margin-bottom: 0.8rem;
}

.focus-card p {
  margin: 0;
  color: var(--muted);
}

.focus-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #08121f;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.timeline {
  display: grid;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.25rem;
  align-items: start;
  padding: 1.5rem 1.25rem 1.5rem 1.4rem;
  background: linear-gradient(180deg, rgba(18, 35, 56, 0.9), rgba(12, 19, 31, 0.88));
  border: 1px solid rgba(122, 162, 255, 0.18);
  border-left: 4px solid var(--accent);
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.timeline-item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 100%;
  background: linear-gradient(90deg, rgba(122, 162, 255, 0.12), transparent 55%);
  pointer-events: none;
}

.timeline-date {
  color: var(--accent);
  font-weight: 700;
  position: relative;
  z-index: 1;
}

.timeline-content h3 {
  margin: 0 0 0.25rem;
  font-size: 1.35rem;
}

.company {
  margin: 0 0 0.65rem;
  color: var(--muted);
  font-weight: 600;
}

.timeline-content p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.project-grid,
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.project-card,
.skill-box {
  background: linear-gradient(180deg, rgba(18, 35, 56, 0.9), rgba(12, 19, 31, 0.88));
  border: 1px solid rgba(122, 162, 255, 0.2);
  border-radius: 22px;
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before,
.skill-box::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
}

.project-card:hover,
.skill-box:hover {
  transform: translateY(-4px);
  border-color: rgba(122, 162, 255, 0.5);
  box-shadow: 0 24px 50px rgba(7, 17, 29, 0.48);
}

.project-tag {
  display: inline-block;
  padding: 0.35rem 0.72rem;
  border-radius: 999px;
  font-size: 0.78rem;
  background: rgba(99, 230, 190, 0.12);
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.project-card h3,
.skill-box h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
}

.project-card p,
.skill-box p {
  margin-top: 0;
  color: var(--muted);
}

.project-card ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--text);
}

.project-card li {
  margin-bottom: 0.55rem;
  color: var(--muted);
}

.project-action {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.9rem;
  color: var(--accent);
  font-weight: 700;
}

.project-action:hover, .project-action:focus-visible, .footer-links a:hover {
  color: #fff;
}

.project-filters {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
}
.filter-label { color: var(--muted); font-size: 0.85rem; font-weight: 600; margin-right: 0.25rem; }
.project-filter {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.025);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}
.project-filter:hover, .project-filter:focus-visible { color: var(--text); border-color: var(--accent); }
.project-filter.is-active { color: #07121e; border-color: var(--accent); background: var(--accent); font-weight: 700; }

.case-study-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
}

.case-study-card h3 { margin-bottom: 0.35rem; }
.case-study-date { margin: 0 0 1rem; color: var(--accent); font-size: 0.88rem; font-weight: 600; }
.case-study-details { margin: 0; }
.case-study-field { display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 0.75rem; padding: 0.7rem 0; border-top: 1px solid var(--line); }
.case-study-field dt { color: var(--text); font-size: 0.78rem; font-weight: 700; }
.case-study-field dd { margin: 0; color: var(--muted); font-size: 0.88rem; line-height: 1.55; }
.case-study-field dd a { color: var(--accent); font-weight: 600; }
.case-study-card .project-action { margin-top: 1rem; }

.lab-intro { max-width: 760px; margin: 0 auto; color: var(--muted); line-height: 1.7; }
.lab-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: stretch; }
.lab-card { display: flex; flex-direction: column; }
.lab-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.8rem; }
.lab-tags span { border: 1px solid rgba(95, 224, 189, 0.2); border-radius: 999px; padding: 0.28rem 0.55rem; color: var(--accent); background: rgba(95, 224, 189, 0.08); font-size: 0.7rem; font-weight: 700; }
.lab-type { margin: 0 0 0.35rem !important; color: var(--accent-warm) !important; font-size: 0.76rem; font-weight: 600; }
.lab-problem { min-height: 4.5em; }
.lab-results { list-style: none; margin: auto 0 1rem !important; padding: 0 !important; }
.lab-results li { position: relative; padding: 0.55rem 0 0.55rem 1rem; border-top: 1px solid var(--line); font-size: 0.85rem; line-height: 1.5; }
.lab-results li::before { content: ""; position: absolute; left: 0; top: 1.05rem; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.lab-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 0.9rem; margin-top: 0.5rem; }
.lab-actions .button { padding: 0.65rem 0.9rem; font-size: 0.82rem; }
.lab-secondary-link { color: var(--accent); font-size: 0.82rem; font-weight: 700; }
.benchmark-chart { display: grid; gap: 0.55rem; margin: 0.2rem 0 0.9rem; }
.benchmark-row { display: grid; grid-template-columns: 84px minmax(40px, 1fr) 46px; align-items: center; gap: 0.5rem; font-size: 0.72rem; color: var(--muted); }
.benchmark-row strong { color: var(--text); text-align: right; font-size: 0.76rem; }
.benchmark-track { height: 8px; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,0.08); }
.benchmark-track span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--primary), var(--accent)); }
.filterable-project[hidden], [data-filter-section][hidden] { display: none !important; }

.skills-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.contact-section {
  padding-bottom: 6rem;
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1.5rem;
  border: 1px solid rgba(122, 162, 255, 0.28);
  background: linear-gradient(180deg, rgba(18, 35, 56, 0.9), rgba(12, 19, 31, 0.88));
  border-radius: 20px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), var(--primary));
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 1.05rem;
  color: var(--text);
  transition: color 0.2s ease;
}

.contact-item:hover,
.contact-item:focus-visible {
  color: var(--accent);
}

.contact-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(122, 162, 255, 0.12);
  border: 1px solid rgba(122, 162, 255, 0.18);
  color: #edf3ff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 18px;
  height: 18px;
  display: block;
  fill: currentColor;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.015);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  min-height: 64px;
  color: var(--muted);
}

.footer-inner p { margin: 0; white-space: nowrap; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.45rem 1rem; font-size: 0.88rem; }
.footer-links a { color: var(--muted); }

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 10px;
  width: 46px;
  height: 46px;
  padding: 0.5rem;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
  border-radius: 2px;
}

@media (max-width: 900px) {
  .hero-grid,
  .section-grid,
  .contact-wrap { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; }
  .project-grid,
  .skills-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project-filters { overflow-x: auto; padding-bottom: 0.45rem; scrollbar-width: thin; }
  .case-study-field { grid-template-columns: 96px minmax(0, 1fr); gap: 0.5rem; }
  .lab-grid { grid-template-columns: 1fr; }
  .lab-problem { min-height: 0; }

  .focus-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    order: -1;
    max-width: 420px;
    margin: 0 auto 1.25rem;
  }

  .credential-card { left: -0.6rem; }

  .case-study-grid { grid-template-columns: 1fr; }
  .lab-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .timeline-item {
    gap: 0.5rem;
  }

  .focus-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .main-nav {
    position: absolute;
    top: 76px;
    left: 1rem;
    right: 1rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    background: rgba(11, 16, 32, 0.96);
    border: 1px solid var(--line);
    border-radius: 16px;
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: block;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 4rem;
  }

  .hero-copy h1 {
    max-width: 100%;
  }

  .impact-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .credential-card { left: 0.25rem; bottom: 0.8rem; }
  .profile-proof-grid { grid-template-columns: 1fr; }

  .hero-actions { gap: 0.65rem; }

  .focus-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    padding: 1rem 0;
    text-align: center;
  }

  .footer-links { justify-content: center; }
}

/* Executive-tech visual system */
:root {
  --bg: #f5f7fa;
  --bg-soft: #edf1f5;
  --bg-card: #ffffff;
  --panel: #ffffff;
  --panel-strong: #e9eef3;
  --text: #172536;
  --muted: #586879;
  --primary: #163b5c;
  --primary-strong: #24577f;
  --accent: #087e78;
  --accent-warm: #087e78;
  --line: rgba(23, 37, 54, 0.13);
  --shadow: 0 22px 55px rgba(23, 37, 54, 0.11);
  --shadow-soft: 0 10px 28px rgba(23, 37, 54, 0.07);
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  background-attachment: scroll;
  color: var(--text);
}
body::before { display: none; }
.site-header { background: rgba(255, 255, 255, 0.94); border-bottom-color: var(--line); box-shadow: 0 4px 18px rgba(23, 37, 54, 0.05); }
.main-nav { color: var(--muted); }
.main-nav a { padding: 0.4rem 0; border-bottom: 2px solid transparent; }
.main-nav a:hover, .main-nav a:focus-visible, .main-nav a.is-active { color: var(--primary); border-bottom-color: var(--accent); }
.brand { color: var(--primary); }
.header-avatar { border-color: var(--line); box-shadow: none; }
.button { min-height: 46px; }
.button-primary, .button-primary:hover, .button-primary:focus-visible { color: #fff; background: var(--primary); box-shadow: 0 8px 18px rgba(22, 59, 92, 0.16); }
.button-secondary { color: var(--primary); border-color: var(--line); background: #fff; }
.button-secondary:hover, .button-secondary:focus-visible { border-color: var(--accent); box-shadow: var(--shadow-soft); }
.hero { padding: 4rem 0 3.5rem; }
.hero-copy h1 { color: var(--primary); background: none; -webkit-text-fill-color: currentColor; }
.eyebrow, .hero-credential, .project-action, .case-study-date, .case-study-field dd a { color: var(--accent); }
.impact-strip div, .hero-panel, .contact-card, .timeline-item, .project-card, .skill-box, .mini-stats div {
  color: var(--text);
  background: #fff;
  border-color: var(--line);
  box-shadow: var(--shadow-soft);
}
.impact-strip strong { color: var(--primary); }
.impact-strip span { color: var(--muted); }
.hero-panel::before, .timeline-item::before, .project-card::before, .skill-box::before { display: none; }
.profile-photo-wrap { border-color: var(--line); box-shadow: none; }
.credential-card { background: #fff; border-color: var(--line); }
.section-alt { background: var(--bg-soft); border-color: var(--line); }
.project-tag, .lab-tags span { color: var(--accent); background: rgba(8, 126, 120, 0.08); border-color: rgba(8, 126, 120, 0.2); }
.lab-type { color: var(--accent) !important; }
.contact-card::before { background: var(--accent); }
.contact-icon { color: var(--primary); background: var(--bg-soft); border-color: var(--line); }
.project-filter { color: var(--muted); background: #fff; border-color: var(--line); }
.project-filter.is-active { color: #fff; border-color: var(--primary); background: var(--primary); }
.value-list div { background: #fff; }
.value-list span, .focus-icon { background: var(--bg-soft); color: var(--accent); }
.focus-card { color: var(--text); background: #fff; border-color: var(--line); }
.benchmark-track { background: #e2e8ee; }
.benchmark-track span { background: var(--accent); }
.footer-inner, .site-footer { background: #fff; border-color: var(--line); }
.footer-links a { color: var(--muted); }
.footer-links a:hover, .project-action:hover, .project-action:focus-visible { color: var(--accent); }
.nav-cta { min-height: 42px; }
.menu-toggle { border-color: var(--line); }
.menu-toggle span { background: var(--primary); }
.main-nav.is-open { background: #fff; box-shadow: var(--shadow); }
a:focus-visible, button:focus-visible { outline: 3px solid rgba(8, 126, 120, 0.35); outline-offset: 3px; }

@media (max-width: 900px) {
  .hero-grid { gap: 1.75rem; }
  .hero-panel { order: 0; max-width: 320px; margin: 0 auto; }
  .profile-photo { aspect-ratio: 1 / 1; object-position: center 35%; }
  .main-nav { background: #fff; }
}

@media (max-width: 600px) {
  .hero { padding: 2rem 0 2.5rem; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-panel { max-width: 250px; }
  .credential-card { max-width: 225px; left: 0.4rem; bottom: 0.65rem; padding: 0.75rem; }
  .impact-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project-grid, .skills-grid, .case-study-grid, .lab-grid { grid-template-columns: minmax(0, 1fr); }
  .button { min-height: 48px; padding: 0.8rem 1rem; }
  .hero-social { min-height: 44px; }
  .case-study-field { grid-template-columns: 88px minmax(0, 1fr); }
  .section { padding: 3.5rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

.career-journey {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1.5rem;
  margin: 3rem 0 1.25rem;
}

.career-journey::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), rgba(122, 162, 255, 0.45));
}

.career-milestone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding-top: 1.65rem;
}

.career-milestone::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 15px;
  height: 15px;
  border: 3px solid var(--bg);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.career-year { color: var(--accent); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.1em; }
.career-milestone strong { font-size: 1rem; line-height: 1.35; }
.career-milestone > span:last-child { color: var(--muted); font-size: 0.88rem; line-height: 1.5; }
.journey-note { color: var(--muted); border-left: 2px solid var(--primary); padding-left: 0.9rem; margin: 1.5rem 0; }

@media (max-width: 700px) {
  .career-journey { grid-template-columns: 1fr; gap: 0; margin-left: 0.4rem; }
  .career-journey::before { top: 0; bottom: 0; left: 6px; right: auto; width: 1px; height: auto; }
  .career-milestone { padding: 0 0 1.5rem 2rem; }
  .career-milestone::before { left: 0; }
}