:root,
:root[data-theme="dark"] {
  color-scheme: dark;
  --background: #0b0f14;
  --header-background: rgba(11, 15, 20, 0.88);
  --surface-hover: #121820;
  --text: #f5f7f8;
  --muted: #9199a3;
  --muted-strong: #b7bec6;
  --border: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.2);
  --toggle-hover: rgba(255, 255, 255, 0.055);
}

:root[data-theme="light"] {
  color-scheme: light;
  --background: #ffffff;
  --header-background: rgba(255, 255, 255, 0.9);
  --surface-hover: #f5f6f7;
  --text: #111418;
  --muted: #69717a;
  --muted-strong: #4e5660;
  --border: rgba(12, 18, 24, 0.1);
  --border-hover: rgba(12, 18, 24, 0.2);
  --toggle-hover: rgba(12, 18, 24, 0.055);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--background);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition:
    background-color 280ms ease,
    color 280ms ease;
}

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

a {
  color: inherit;
}

button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

/* Header */

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  background: var(--header-background);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  backdrop-filter: blur(16px) saturate(1.15);
  transform: translateY(0);
  transition:
    transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1),
    background-color 280ms ease,
    border-color 280ms ease;
  will-change: transform;
}

header.header-hidden {
  transform: translateY(calc(-100% - 1px));
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  width: 148px;
  text-decoration: none;
}

.brand img {
  width: 148px;
  height: auto;
  transition:
    opacity 220ms ease,
    transform 280ms ease;
}

.brand-logo-light {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(2px);
}

:root[data-theme="light"] .brand-logo-dark {
  opacity: 0;
  transform: translateY(-2px);
}

:root[data-theme="light"] .brand-logo-light {
  opacity: 1;
  transform: translateY(0);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.theme-toggle {
  position: relative;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted-strong);
  cursor: pointer;
  touch-action: manipulation;
  overflow: hidden;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.theme-toggle:hover {
  background: var(--toggle-hover);
  color: var(--text);
  border-color: var(--border-hover);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle svg {
  position: absolute;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition:
    opacity 220ms ease,
    transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.theme-toggle .sun {
  opacity: 0;
  transform: rotate(-55deg) scale(0.65);
}

.theme-toggle .moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

:root[data-theme="light"] .theme-toggle .sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

:root[data-theme="light"] .theme-toggle .moon {
  opacity: 0;
  transform: rotate(55deg) scale(0.65);
}

/* Main */

main {
  flex: 1;
}

.projects {
  padding: 84px 0 116px;
}

.projects-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
}

.projects-header h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
  font-weight: 560;
  letter-spacing: -0.02em;
}

.view-all-projects {
  position: relative;
  flex-shrink: 0;
  color: var(--muted-strong);
  font-size: 13px;
  font-weight: 550;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 160ms ease;
}

.view-all-projects:hover {
  color: var(--text);
}

.project {
  position: relative;
  min-height: 390px;
  padding: 48px 48px 52px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  overflow: hidden;
  transition:
    background-color 280ms ease,
    border-color 160ms ease,
    color 280ms ease;
}

.project:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}

.themed-project-logo {
  position: relative;
  width: min(430px, 100%);
  margin-bottom: 58px;
}

.themed-project-logo img {
  width: 100%;
  height: auto;
  transition:
    opacity 220ms ease,
    transform 280ms ease;
}

.themed-project-logo .logo-light {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(2px);
}

:root[data-theme="light"] .themed-project-logo .logo-dark {
  opacity: 0;
  transform: translateY(-2px);
}

:root[data-theme="light"] .themed-project-logo .logo-light {
  opacity: 1;
  transform: translateY(0);
}

.project-content {
  max-width: 680px;
  padding-right: 120px;
}

.project-content h2 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.25;
  font-weight: 550;
  letter-spacing: -0.015em;
}

.project-title-link {
  text-decoration: none;
}

.project-title-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}

.project-content p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
  transition: color 280ms ease;
}

.project-link {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  touch-action: manipulation;
  gap: 8px;
  margin-top: 28px;
  font-size: 14px;
  font-weight: 550;
  text-decoration: none;
}

.project-link .arrow {
  display: inline-block;
  transition: transform 160ms ease;
}

.project:hover .project-link .arrow {
  transform: translateX(3px);
}

.project-url {
  position: absolute;
  right: 48px;
  bottom: 48px;
  z-index: 2;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  touch-action: manipulation;
  transition: color 160ms ease;
}

.project-url:hover {
  color: var(--text);
}

/* Footer */

footer {
  border-top: 1px solid var(--border);
  transition: border-color 280ms ease;
}

.footer-inner {
  min-height: 112px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.footer-copy {
  display: grid;
  gap: 5px;
}

.footer-brand {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.footer-description {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
  transition: color 280ms ease;
}

.footer-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 0;
  touch-action: manipulation;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: color 160ms ease;
}

.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 5px;
  height: 1px;
  background: var(--text);
  transition:
    right 160ms ease,
    background-color 280ms ease;
}

.footer-link:hover {
  color: var(--text);
}

.footer-link:hover::after {
  right: 0;
}

/* Accessibility */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 4px;
}

/* Responsive */

@media (max-width: 700px) {
  .container {
    width: min(100% - 36px, 1120px);
  }

  .header-inner {
    min-height: 64px;
  }

  .brand {
    width: 128px;
  }

  .brand img {
    width: 128px;
  }

  .theme-toggle {
    width: 40px;
    height: 40px;
  }

  .projects {
    padding: 56px 0 76px;
  }

  .projects-header {
    gap: 18px;
    margin-bottom: 24px;
  }

  .projects-header h1 {
    font-size: 22px;
  }

  .view-all-projects {
    font-size: 12px;
  }

  .project {
    min-height: 0;
    padding: 30px;
  }

  .themed-project-logo {
    width: min(320px, 100%);
    margin-bottom: 38px;
  }

  .project-content {
    max-width: none;
    padding-right: 0;
  }

  .project-content h2 {
    font-size: 21px;
  }

  .project-content p {
    font-size: 15px;
    line-height: 1.6;
  }

  .project-link {
    margin-top: 22px;
  }

  .project-url {
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    margin-top: 18px;
    font-size: 13px;
    overflow-wrap: anywhere;
  }

  .footer-inner {
    min-height: 0;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 18px;
    padding: 28px 0;
  }

  .footer-copy {
    max-width: 520px;
  }

  .footer-description {
    font-size: 12px;
    line-height: 1.6;
  }
}

@media (max-width: 440px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .projects {
    padding: 48px 0 64px;
  }

  .projects-header {
    align-items: baseline;
  }

  .view-all-projects {
    max-width: 122px;
    text-align: right;
    line-height: 1.35;
  }

  .project {
    padding: 24px;
    border-radius: 9px;
  }

  .themed-project-logo {
    margin-bottom: 32px;
  }

  .project-content h2 {
    font-size: 20px;
  }

  .footer-description {
    max-width: 34ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}