:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-muted: #edf3ff;
  --text: #0f172a;
  --text-subtle: #475569;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --border: rgba(15, 23, 42, 0.1);
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 22px 44px rgba(37, 99, 235, 0.16);
  --hero-gradient: radial-gradient(circle at 10% 10%, rgba(37, 99, 235, 0.18), transparent 48%),
    radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.15), transparent 36%);
  --header-bg: rgba(255, 255, 255, 0.75);
}

html[data-theme="dark"] {
  --bg: #060c19;
  --surface: #101a2f;
  --surface-muted: #0d162a;
  --text: #e2e8f0;
  --text-subtle: #9ca9be;
  --primary: #60a5fa;
  --primary-strong: #3b82f6;
  --border: rgba(148, 163, 184, 0.2);
  --shadow: 0 18px 40px rgba(2, 6, 23, 0.5);
  --shadow-hover: 0 22px 44px rgba(59, 130, 246, 0.25);
  --hero-gradient: radial-gradient(circle at 10% 10%, rgba(96, 165, 250, 0.2), transparent 42%),
    radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.24), transparent 42%);
  --header-bg: rgba(8, 14, 28, 0.78);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  background-image: var(--hero-gradient);
  background-attachment: fixed;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

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

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.section {
  padding: 5.75rem 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2rem;
}

.section-heading h2 {
  margin: 0.45rem 0 0.9rem;
  font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  line-height: 1.2;
  font-family: "Space Grotesk", "Inter", sans-serif;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--surface);
  color: var(--text);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
}

.nav-wrapper {
  min-height: 4.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  padding: 0.45rem 0.65rem;
  border-radius: 999px;
  color: var(--text-subtle);
  font-weight: 500;
  transition: color 0.24s ease, background-color 0.24s ease;
}

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

.header-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.18rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  padding: 0.2rem;
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--text-subtle);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 999px;
  padding: 0.3rem 0.55rem;
  cursor: pointer;
  transition: color 0.24s ease, background-color 0.24s ease;
}

.lang-btn.is-active {
  background: var(--primary);
  color: #ffffff;
}

.lang-btn:not(.is-active):hover,
.lang-btn:not(.is-active):focus-visible {
  color: var(--text);
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
  padding: 0.35rem 0.65rem 0.35rem 0.4rem;
  cursor: pointer;
  transition: border-color 0.24s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.toggle-indicator {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: linear-gradient(130deg, #fbbf24, #f59e0b);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.24);
}

html[data-theme="dark"] .toggle-indicator {
  background: linear-gradient(130deg, #60a5fa, #1d4ed8);
}

.hero {
  padding-top: 4.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 1.6rem;
  align-items: stretch;
}

.hero-copy h1 {
  margin: 0.65rem 0 1.1rem;
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.hero-copy p {
  margin: 0;
  max-width: 62ch;
  color: var(--text-subtle);
}

.hero-actions {
  margin-top: 1.65rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  border-radius: 0.75rem;
  border: 1px solid var(--primary);
  padding: 0.62rem 1rem;
  font-weight: 600;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background-color 0.22s ease;
}

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

.button.primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.3);
}

.button.primary:hover,
.button.primary:focus-visible {
  background: var(--primary-strong);
}

.button.ghost {
  color: var(--primary);
  background: transparent;
}

.button.ghost:hover,
.button.ghost:focus-visible {
  background: rgba(37, 99, 235, 0.1);
}

.hero-highlights {
  margin: 1.4rem 0 0;
  padding-left: 1.2rem;
  color: var(--text-subtle);
}

.hero-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.hero-panel h2 {
  margin-top: 0;
  margin-bottom: 0.9rem;
  font-size: 1.1rem;
  font-family: "Space Grotesk", "Inter", sans-serif;
}

.hero-panel ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--text-subtle);
}

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

.project-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: var(--shadow-hover);
}

.project-card h3 {
  margin: 0;
  font-size: 1.2rem;
  font-family: "Space Grotesk", "Inter", sans-serif;
}

.project-card p {
  margin: 0;
  color: var(--text-subtle);
}

.project-card a {
  margin-top: auto;
  color: var(--primary);
  font-weight: 600;
}

.project-card a:hover,
.project-card a:focus-visible {
  text-decoration: underline;
}

.tag-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag-list li {
  font-size: 0.8rem;
  color: var(--text-subtle);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.24rem 0.65rem;
}

.photo-order-note {
  margin: 0.8rem 0 0;
  color: var(--text-subtle);
  font-size: 0.92rem;
}

.photo-theme-list {
  display: grid;
  gap: 1.15rem;
}

.photo-theme {
  border: 1px solid var(--border);
  border-radius: 1.1rem;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.photo-theme-header {
  margin-bottom: 0.95rem;
}

.photo-theme-header h3 {
  margin: 0;
  font-size: 1.2rem;
  font-family: "Space Grotesk", "Inter", sans-serif;
}

.photo-theme-header p {
  margin: 0.45rem 0 0;
  color: var(--text-subtle);
}

.photo-masonry {
  column-count: 3;
  column-gap: 0.85rem;
}

.photo-card {
  display: inline-block;
  width: 100%;
  margin: 0 0 0.85rem;
  border-radius: 0.95rem;
  overflow: hidden;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.14);
  break-inside: avoid;
}

.photo-card img {
  width: 100%;
  height: auto;
  transition: transform 0.35s ease;
}

.photo-card figcaption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.7rem 0.65rem;
  font-size: 0.8rem;
  color: var(--text-subtle);
}

.photo-tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.2rem 0.56rem;
  background: rgba(37, 99, 235, 0.14);
  color: var(--primary);
  font-weight: 600;
}

.photo-card time {
  font-variant-numeric: tabular-nums;
}

.photo-card:hover img {
  transform: scale(1.04);
}

.skills-shell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  box-shadow: var(--shadow);
  padding: 1.2rem;
}

.skill-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.skill-tab {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-subtle);
  font-weight: 600;
  border-radius: 999px;
  padding: 0.5rem 0.85rem;
  cursor: pointer;
  transition: all 0.24s ease;
}

.skill-tab.is-active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.skill-panel {
  display: none;
}

.skill-panel.is-active {
  display: block;
}

.skill-list {
  margin: 0;
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.skill-item {
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  padding: 0.8rem;
  background: var(--surface-muted);
}

.skill-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 600;
  font-size: 0.94rem;
  margin-bottom: 0.55rem;
}

.skill-meter {
  width: 100%;
  height: 0.46rem;
  background: rgba(148, 163, 184, 0.22);
  border-radius: 999px;
  overflow: hidden;
}

.skill-meter span {
  display: block;
  height: 100%;
  width: var(--level);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), #0ea5e9);
  transition: width 0.7s ease;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.1rem;
}

.contact-copy,
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.contact-copy h2 {
  margin-top: 0.5rem;
  margin-bottom: 0.85rem;
  font-size: clamp(1.5rem, 2.7vw, 2rem);
  font-family: "Space Grotesk", "Inter", sans-serif;
}

.contact-copy p {
  margin: 0;
  color: var(--text-subtle);
}

.contact-links {
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
}

.contact-links a {
  color: var(--primary);
  font-weight: 600;
}

.contact-links a:hover,
.contact-links a:focus-visible {
  text-decoration: underline;
}

.contact-form {
  display: grid;
  gap: 0.58rem;
}

.contact-form label {
  font-weight: 600;
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  padding: 0.62rem 0.72rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(37, 99, 235, 0.35);
  border-color: var(--primary);
}

.form-status {
  min-height: 1.25rem;
  margin: 0.2rem 0 0;
  color: var(--text-subtle);
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 2.2rem;
  padding: 1.4rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: center;
  color: var(--text-subtle);
  font-size: 0.9rem;
}

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  color: var(--primary);
  font-weight: 600;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

@media (max-width: 980px) {
  .hero-grid,
  .contact-layout {
    grid-template-columns: 1fr;
  }

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

  .photo-masonry {
    column-count: 2;
  }
}

@media (max-width: 760px) {
  .nav-wrapper {
    min-height: auto;
    flex-wrap: wrap;
    padding: 0.85rem 0;
  }

  .header-controls {
    margin-left: auto;
  }

  .site-nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    border-top: 1px solid var(--border);
    padding-top: 0.55rem;
  }

  .section {
    padding: 4.8rem 0;
  }

  .hero {
    padding-top: 3.8rem;
  }

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

  .photo-masonry {
    column-count: 1;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}