/* main.css – global styles, paste exactly what was inline in index.html */

/* ── Fonts ──
   Loaded via <link> in each page's <head> (faster than @import, which blocks
   rendering until main.css itself has downloaded and parsed). */

:root, [data-theme="light"] {
  --text-xs:   clamp(0.75rem, 0.73rem + 0.1vw, 0.8125rem);
  --text-sm:   clamp(0.8125rem, 0.79rem + 0.15vw, 0.9375rem);
  --text-base: 1rem;
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(1.8rem, 1.3rem + 1.5vw, 2.75rem);
  --text-3xl: clamp(2.2rem, 1.4rem + 1.8vw, 3.25rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --section-y: clamp(var(--space-8), 3.5vw, var(--space-12)); /* vertical padding of every section */
  --space-32: 8rem;

  --color-bg: #f0f4fa;
  --color-surface: #f8fafd;
  --color-surface-2: #e8f0f9;
  --color-surface-offset: #dde8f5;
  --color-divider: #c5d6ed;
  --color-border: #b8cfe8;
  --color-text: #0f1a2e;
  --color-text-muted: #4a5a72;
  --color-text-faint: #7d90aa;
  --color-text-inverse: #f4f8ff;
  --color-primary: #1a4a8a;
  --color-primary-hover: #123570;
  --color-primary-active: #0c2558;
  --color-primary-highlight: #d6e4f7;
  --color-secondary: #3e78c8;
  --color-accent: #1e7cb8;
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(25, 30, 24, 0.06);
  --shadow-md: 0 10px 30px rgba(25, 30, 24, 0.08);
  --shadow-lg: 0 24px 60px rgba(25, 30, 24, 0.12);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-default: 1100px;
  --content-wide: 1120px;
  --font-display: 'Source Serif 4', Georgia, serif;
  --font-body: 'Inter', sans-serif;
  --header-h-mobile: 6.5rem;
}

[data-theme="dark"] {
  --color-bg: #0d1220;
  --color-surface: #131926;
  --color-surface-2: #192033;
  --color-surface-offset: #1f2a40;
  --color-divider: #28375a;
  --color-border: #334570;
  --color-text: #e8e9e4;
  --color-text-muted: #b2b6af;
  --color-text-faint: #80867d;
  --color-text-inverse: #18201c;
  --color-primary: #6b9fe0;
  --color-primary-hover: #89b4e8;
  --color-primary-active: #aac8f0;
  --color-primary-highlight: #1a2e50;
  --color-secondary: #7ab2f0;
  --color-accent: #5ab4f0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
  --shadow-md: 0 10px 30px rgba(0,0,0,.28);
  --shadow-lg: 0 24px 60px rgba(0,0,0,.38);
}

*,:before,:after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
}
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img,svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button,input,textarea { font: inherit; color: inherit; }
button { border: 0; background: none; cursor: pointer; }
p { max-width: 68ch; color: var(--color-text-muted); }
h1,h2,h3,h4 { font-family: var(--font-display); line-height: 1.08; font-weight: 600; text-wrap: balance; }
.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;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  transform: translateY(-200%);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-full);
  z-index: 1000;
}
.skip-link:focus { transform: translateY(0); }

.site-shell {
  width: min(calc(100% - clamp(2rem, 8vw, 8rem)), var(--content-wide));
  margin-inline: auto;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.35rem;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--color-primary-highlight), var(--color-surface));
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  flex-wrap: wrap;
}

nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle,
.contact-chip {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
  background: var(--color-surface);
  transition: transform var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive);
}

.contact-chip {
  padding-inline: var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.theme-toggle:hover,
.contact-chip:hover { transform: translateY(-1px); }

main {
  padding-top: 4rem; /* matches .nav min-height */
}

.hero {
  padding: clamp(1.5rem, 4vw, 3rem) 0 var(--section-y);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(360px, 1fr);
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: start;
}
.hero-card .hero-metrics { margin-bottom: 0; }
.stat-card { padding: var(--space-4) var(--space-5); }
.stat-card p { margin: 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: var(--space-5);
}

.hero h1 {
  font-size: var(--text-3xl);
  max-width: 16ch;
  margin-bottom: var(--space-5);
}

.hero-copy p + p { margin-top: var(--space-4); }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.btn {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive), color var(--transition-interactive);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: color-mix(in srgb, var(--color-text) 12%, transparent);
}
.btn-secondary:hover { background: var(--color-surface-2); transform: translateY(-1px); }

.hero-card,
.panel,
.timeline-item,
.project-card,
.stat-card,
.contact-card {
  background: var(--color-surface);
  border: 1px solid color-mix(in srgb, var(--color-text) 9%, transparent);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}
.project-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.project-card-link:hover .project-card,
.project-card-link:focus-visible .project-card {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.hero-card {
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
}

.hero-card:before {
  content: "";
  position: absolute;
  inset: auto -3rem -3rem auto;
  width: 13rem;
  height: 13rem;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--color-primary) 18%, transparent), transparent 70%);
  pointer-events: none;
}

.identity-block {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.identity-block h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.muted-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.role-list,
.meta-list,
.skills-list,
.interest-list,
.contact-list,
.inline-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.pill,
.inline-tags li,
.role-list li,
.interest-list li {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--color-text) 7%, transparent);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin: var(--space-8) 0;
}

.stat-card {
  padding: var(--space-5);
  background: color-mix(in srgb, var(--color-surface) 75%, var(--color-primary-highlight));
}

.stat-value {
  font-size: var(--text-xl);
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.meta-stack {
  display: grid;
  gap: var(--space-4);
}

.meta-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.meta-row svg {
  width: 1.15rem;
  flex: 0 0 auto;
  margin-top: 0.15rem;
  color: var(--color-primary);
}

section {
  padding: var(--section-y) 0;
}

section[id] {
  scroll-margin-top: calc(2rem - var(--section-y));
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--space-8);
  align-items: end;
  margin-bottom: var(--space-8);
}

.section-head h2 {
  font-size: var(--text-2xl);
  max-width: 11ch;
}

.panel {
  padding: clamp(var(--space-6), 4vw, var(--space-8));
}

.value-grid,
.skills-grid,
.projects-grid,
.contact-grid,
.two-col-grid {
  display: grid;
  gap: var(--space-5);
}

.value-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.skills-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.projects-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.contact-grid { grid-template-columns: 1.1fr 0.9fr; }
.two-col-grid { grid-template-columns: 1.05fr 0.95fr; }

/* ── Featured projects ── */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}

.featured-card {
  padding: 0;
  overflow: hidden;
}

.featured-card .featured-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex: 1 1 auto;
}

.project-thumb {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border-bottom: 1px solid color-mix(in srgb, var(--color-text) 9%, transparent);
  background: var(--color-surface-2);
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.featured-card:hover .project-thumb img { transform: scale(1.03); }

.card-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.card-metrics li {
  list-style: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-full);
  background: var(--color-primary-highlight);
  border: 1px solid color-mix(in srgb, var(--color-primary) 16%, transparent);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.card-metrics li strong {
  font-weight: 800;
  color: var(--color-primary);
}

.card-links {
  display: flex;
  gap: var(--space-4);
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid color-mix(in srgb, var(--color-text) 7%, transparent);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  transition: color var(--transition-interactive);
}

.card-link:hover { color: var(--color-primary-hover); }

.card-link--external { margin-left: auto; }

.card-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.card-cta {
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(180deg, color-mix(in srgb, var(--color-surface) 72%, transparent), var(--color-primary-highlight));
}

/* ── Case-study shared components ── */
.project-header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

.project-header-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-text-faint);
  opacity: 0.6;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.badge {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  font-weight: 600;
}

.callout {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-primary-highlight);
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, transparent);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.project-footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-8) 0 var(--space-12);
}

.project-footer-nav .btn { max-width: 100%; }

.value-card h3,
.project-card h3,
.contact-card h3,
.panel h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.value-card {
  padding: var(--space-6);
  background: linear-gradient(180deg, color-mix(in srgb, var(--color-surface) 72%, transparent), var(--color-surface-2));
  border-radius: calc(var(--radius-xl) - 0.5rem);
  border: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
}

.timeline {
  display: grid;
  gap: var(--space-5);
}

.timeline-item {
  padding: var(--space-6);
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: var(--space-5);
}

.timeline-date {
  font-size: var(--text-xs);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-item h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-1);
}

.timeline-item strong {
  color: var(--color-text);
}

.timeline-item ul,
.project-card ul,
.panel ul {
  margin-top: var(--space-4);
  display: grid;
  gap: var(--space-2);
  padding-left: 1.1rem;
  color: var(--color-text-muted);
}

.project-card {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 100%;
}

.project-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.project-kicker {
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.project-links {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-2);
}

.text-link {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
}

.skill-block {
  padding: var(--space-5);
  border-radius: calc(var(--radius-xl) - 0.5rem);
  background: color-mix(in srgb, var(--color-surface) 60%, var(--color-surface-2));
  border: 1px solid color-mix(in srgb, var(--color-text) 7%, transparent);
}

.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.skill-bar {
  position: relative;
  width: 100%;
  height: 0.6rem;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  overflow: hidden;
}

.skill-bar span {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

.contact-card {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  justify-content: space-between;
}

.contact-list {
  display: grid;
  gap: var(--space-1);
}

.contact-list a,
.contact-list span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 2.25rem;
  color: var(--color-text-muted);
  word-break: break-word;
}

.contact-list svg { width: 1.05rem; color: var(--color-primary); }

footer {
  padding: var(--space-6) 0 var(--space-8);
  border-top: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
}
.footer-links { 
  display: flex; 
  flex-wrap: wrap; 
  gap: var(--space-5);
 }
.footer-links a:hover { 
  color: var(--color-text);
 }
.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}


@media (max-width: 1180px) {
  .projects-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .hero-grid,
  .section-head,
  .contact-grid,
  .two-col-grid,
  .projects-grid,
  .skills-grid,
  .value-grid,
  .featured-grid {
    grid-template-columns: 1fr;
  }
  .timeline-item {
    grid-template-columns: 1fr;
  }
  .identity-block {
    flex-direction: column;
  }
}

@media (max-width: 760px) {
  /* Mobile header: row 1 = brand + actions, row 2 = horizontally scrollable nav */
  .nav {
    flex-wrap: wrap;
    min-height: 0;
    padding-block: var(--space-2) 0;
    row-gap: 0;
  }
  .brand-mark { width: 2.25rem; height: 2.25rem; }
  nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  nav::-webkit-scrollbar { display: none; }
  nav ul {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: var(--space-5);
  }
  nav a {
    display: inline-block;
    white-space: nowrap;
    padding-block: var(--space-2);
  }
  .nav-actions { gap: var(--space-2); }
  .contact-chip { padding-inline: var(--space-3); }
  main { padding-top: var(--header-h-mobile); }
  html { scroll-padding-top: var(--header-h-mobile); }
  .hero-card,
  .panel,
  .project-card,
  .timeline-item,
  .contact-card { padding: var(--space-5); }
  .hero-metrics { grid-template-columns: 1fr; }
  .hero h1 { max-width: 16ch; }
  .site-shell { width: min(calc(100% - 1rem), var(--content-wide)); }
  .hero-actions,
  .project-links { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}