:root {
  color-scheme: light dark;
  --bg: #f7f5f0;
  --surface: #ffffff;
  --text: #1d1f1f;
  --muted: #6b6b67;
  --border: #e3dfd6;
  --accent: #355f5c;
  --accent-soft: rgba(53, 95, 92, 0.12);
  --shadow: 0 18px 40px rgba(26, 28, 28, 0.08);
  --radius: 18px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 72px;
  --space-7: 96px;
  --max-width: 1080px;
  --body-font: "Segoe UI", "Helvetica Neue", "Noto Sans", Arial, sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101211;
  --surface: #151918;
  --text: #eceae4;
  --muted: #a2a099;
  --border: #2a2f2d;
  --accent: #89b2a6;
  --accent-soft: rgba(137, 178, 166, 0.16);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

html[data-theme="light"] {
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  html[data-theme="system"] {
    color-scheme: dark;
    --bg: #101211;
    --surface: #151918;
    --text: #eceae4;
    --muted: #a2a099;
    --border: #2a2f2d;
    --accent: #89b2a6;
    --accent-soft: rgba(137, 178, 166, 0.16);
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--body-font);
  background: radial-gradient(circle at top left, rgba(53, 95, 92, 0.08), transparent 45%),
    radial-gradient(circle at 20% 40%, rgba(53, 95, 92, 0.06), transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.7;
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

a:hover {
  color: var(--accent);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section {
  padding: var(--space-6) 0;
}

.section h2 {
  font-size: clamp(1.4rem, 1.2rem + 1vw, 2rem);
  margin: 0 0 var(--space-2);
}

.section-intro {
  color: var(--muted);
  max-width: 70ch;
  margin: 0 0 var(--space-4);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(247, 245, 240, 0.75);
  border-bottom: 1px solid transparent;
  transition: background 200ms ease, border-color 200ms ease;
}

html[data-theme="dark"] .site-header {
  background: rgba(16, 18, 17, 0.8);
}

.site-header.is-scrolled {
  border-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: var(--space-3);
  font-size: 0.95rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-switch {
  display: flex;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px;
  border-radius: 999px;
}

.theme-switch button,
.language-switch button {
  border: none;
  background: transparent;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--muted);
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease;
}

.theme-switch button[aria-pressed="true"],
.language-switch button[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent);
}

.language-switch {
  display: flex;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px;
  border-radius: 999px;
}

.flag-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 20px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
}

.flag-mark svg {
  width: 100%;
  height: 100%;
  display: block;
}

.hero h1 {
  font-size: clamp(2.6rem, 2rem + 2.2vw, 3.8rem);
  max-width: 18ch;
  margin: var(--space-2) 0;
}

.lead {
  font-size: 1.1rem;
  max-width: 60ch;
  color: var(--muted);
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin: 0;
}

.cta-row {
  display: flex;
  gap: var(--space-2);
  margin: var(--space-4) 0 var(--space-2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.95rem;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.btn.primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.btn.primary:hover {
  transform: translateY(-2px);
}

.btn.ghost {
  background: transparent;
  color: var(--text);
}

.btn.ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.micro-proof {
  color: var(--muted);
  font-size: 0.95rem;
}

.project {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  box-shadow: var(--shadow);
}

.project summary {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  cursor: pointer;
}

.project summary::-webkit-details-marker {
  display: none;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 600;
}

.project-role {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--muted);
}

.project-body {
  margin-top: var(--space-3);
  display: grid;
  gap: var(--space-2);
}

.project-body h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.capability-block {
  border-left: 2px solid var(--accent-soft);
  padding-left: var(--space-3);
  margin-bottom: var(--space-3);
}

.capability-block h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.principles {
  padding-left: 18px;
  margin: var(--space-2) 0 0;
  color: var(--muted);
}

.contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}

.contact-label {
  color: var(--muted);
  margin: 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.contact-value {
  margin: 4px 0 0;
  font-size: 1.1rem;
}

.contact-links {
  display: flex;
  gap: var(--space-3);
  font-size: 0.95rem;
}

.site-footer {
  padding: var(--space-4) 0 var(--space-5);
  color: var(--muted);
  font-size: 0.85rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .header-inner {
    flex-wrap: wrap;
    justify-content: center;
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .cta-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 var(--space-3);
  }

  .header-controls {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .theme-switch,
  .language-switch {
    width: 100%;
    justify-content: center;
  }
}