:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-alt: #eef3f8;
  --text: #111827;
  --muted: #4b5563;
  --border: #d7dde5;
  --primary: #0f766e;
  --primary-strong: #115e59;
  --accent: #1d4ed8;
  --success: #0f766e;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;

  --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;

  --text-xs: 0.78rem;
  --text-sm: 0.92rem;
  --text-md: 1rem;
  --text-lg: 1.12rem;
  --text-xl: 1.35rem;
  --text-2xl: clamp(1.65rem, 4.6vw, 2.3rem);
  --text-3xl: clamp(2rem, 6vw, 2.95rem);

  --container: 1120px;
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0b1220;
  --surface: #131d2e;
  --surface-alt: #1a2638;
  --text: #e5ebf5;
  --muted: #afbdd3;
  --border: #2e3f57;
  --primary: #2dd4bf;
  --primary-strong: #5eead4;
  --accent: #60a5fa;
  --success: #14b8a6;
  --shadow-sm: 0 2px 12px rgba(2, 6, 23, 0.35);
  --shadow-md: 0 14px 30px rgba(2, 6, 23, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --bg: #0b1220;
    --surface: #131d2e;
    --surface-alt: #1a2638;
    --text: #e5ebf5;
    --muted: #afbdd3;
    --border: #2e3f57;
    --primary: #2dd4bf;
    --primary-strong: #5eead4;
    --accent: #60a5fa;
    --success: #14b8a6;
    --shadow-sm: 0 2px 12px rgba(2, 6, 23, 0.35);
    --shadow-md: 0 14px 30px rgba(2, 6, 23, 0.4);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', 'Segoe UI', sans-serif;
  background: radial-gradient(circle at 10% 8%, rgba(29, 78, 216, 0.08), transparent 28%),
    radial-gradient(circle at 88% 4%, rgba(15, 118, 110, 0.08), transparent 28%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: var(--text-md);
  min-height: 100vh;
  text-rendering: optimizeLegibility;
}

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.container {
  width: min(92%, var(--container));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--surface);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  z-index: 1000;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 75%, transparent);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-avatar {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.nav-toggle {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  padding: var(--space-2) var(--space-3);
}

.nav-menu {
  display: none;
  width: 100%;
  position: absolute;
  left: 0;
  top: 72px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.nav-menu.open {
  display: block;
}

.nav-links,
.nav-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-4) var(--space-6);
}

.nav-link {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-weight: 500;
}

.nav-link.active,
.nav-link:hover {
  background: var(--surface-alt);
  color: var(--text);
}

.icon-links {
  display: flex;
  gap: var(--space-2);
}

.icon-link {
  border: 1px solid var(--border);
  border-radius: 999px;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--muted);
  background: var(--surface);
}

.icon-link:hover {
  color: var(--text);
  border-color: var(--accent);
}

.theme-btn,
.btn {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

.theme-btn {
  padding: var(--space-2) var(--space-3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.62rem 1rem;
  font-weight: 600;
  font-size: var(--text-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #f8fbff;
}

.btn-primary:hover {
  background: var(--primary-strong);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
}

.btn-ghost {
  background: transparent;
}

.main {
  padding: var(--space-10) 0 var(--space-16);
}

.section {
  margin-top: var(--space-12);
}

.section:first-child {
  margin-top: 0;
}

.section-title {
  margin: 0;
  font-size: var(--text-2xl);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.section-subtitle {
  margin-top: var(--space-2);
  color: var(--muted);
  max-width: 70ch;
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.mt-0 {
  margin-top: 0;
}

.mt-3 {
  margin-top: var(--space-3);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mb-2 {
  margin-bottom: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
}

.hero {
  display: grid;
  gap: var(--space-8);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-xs);
  border: 1px solid color-mix(in srgb, var(--success) 50%, var(--border));
  color: var(--success);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  font-weight: 600;
}

.hero h1 {
  margin: 0;
  font-size: var(--text-3xl);
  line-height: 1.14;
}

.hero-titleline {
  margin: var(--space-3) 0 0;
  color: var(--muted);
  font-size: var(--text-lg);
}

.hero-value {
  margin: var(--space-4) 0 var(--space-6);
  max-width: 62ch;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.abstract-graphic {
  width: 100%;
  max-width: 350px;
  aspect-ratio: 5 / 6;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 22% 18%, color-mix(in srgb, var(--accent) 26%, transparent) 0%, transparent 42%),
    radial-gradient(circle at 76% 74%, color-mix(in srgb, var(--primary) 24%, transparent) 0%, transparent 48%),
    linear-gradient(135deg, color-mix(in srgb, var(--surface-alt) 70%, transparent), color-mix(in srgb, var(--surface) 76%, transparent));
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.abstract-image {
  position: absolute;
  inset: 7% 7%;
  width: 86%;
  height: 86%;
  object-fit: cover;
  object-position: 52% 26%;
  border-radius: 22px;
  z-index: 1;
}

.hero-visual {
  display: grid;
  gap: var(--space-3);
  justify-items: center;
}

.avatar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.avatar-image {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  object-fit: cover;
  border: 1px solid var(--border);
  display: block;
  margin: 0 auto;
}

.hero-main-image {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  justify-self: center;
}

.abstract-graphic::after {
  content: '';
  position: absolute;
  inset: 7% 7%;
  border-radius: 22px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--surface) 18%, transparent) 0%,
    color-mix(in srgb, var(--surface) 4%, transparent) 62%,
    transparent 100%
  );
  z-index: 2;
  pointer-events: none;
}

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

.strip-items,
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.strip-item,
.chip,
.tag {
  border: 1px solid var(--border);
  background: var(--surface-alt);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-size: var(--text-xs);
  color: var(--muted);
  font-weight: 600;
}

.project-card {
  display: grid;
  gap: var(--space-3);
}

.project-card h3 {
  margin: 0;
  font-size: var(--text-xl);
}

.project-line {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-sm);
}

.project-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-2);
}

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

.timeline-item {
  border-left: 2px solid var(--border);
  padding-left: var(--space-4);
}

.timeline-item h3 {
  margin: 0;
  font-size: var(--text-lg);
}

.timeline-meta {
  color: var(--muted);
  margin: var(--space-1) 0 var(--space-2);
  font-size: var(--text-sm);
}

.timeline ul {
  margin: 0;
  padding-left: 1.1rem;
}

.timeline li {
  margin-bottom: var(--space-1);
}

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

.skill-group h3 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
}

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

.filter-bar {
  display: grid;
  gap: var(--space-4);
}

.chip-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-size: var(--text-xs);
  font-weight: 700;
  cursor: pointer;
}

.chip-btn.active,
.chip-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 9%, var(--surface));
}

.select {
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

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

.case-layout {
  display: grid;
  gap: var(--space-6);
}

.case-sidebar {
  position: relative;
  align-self: start;
}

.case-sidebar .card {
  position: sticky;
  top: 96px;
}

.case-section {
  scroll-margin-top: 96px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table th,
.data-table td {
  border: 1px solid var(--border);
  padding: 0.65rem;
  text-align: left;
}

.data-table th {
  background: var(--surface-alt);
}

.chart {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.bar {
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 18%, var(--surface-alt));
  height: 14px;
  position: relative;
  overflow: hidden;
}

.bar > span {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.kv {
  margin: 0;
  color: var(--muted);
}

.cv-embed {
  width: 100%;
  min-height: 540px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-alt);
}

.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-8) 0;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
}

.footer-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  color: var(--muted);
}

.fade-in {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@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;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 860px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: auto;
    position: static;
    background: transparent;
    border: 0;
    gap: var(--space-4);
  }

  .nav-links,
  .nav-actions {
    flex-direction: row;
    align-items: center;
    padding: 0;
    gap: var(--space-2);
  }

  .hero {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

  .hero-visual {
    justify-items: end;
  }

  .abstract-graphic {
    max-width: 350px;
  }

  .strip {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

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

  .skill-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .filter-bar {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .case-layout {
    grid-template-columns: 1.7fr 0.8fr;
  }

  .footer-wrap {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}