/* ----------------------------------------------------------------
   Custom Properties
   ---------------------------------------------------------------- */

:root {
  --font-size-scale: 1;
  --page-gutter: 1.5rem;
  color-scheme: light;

  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-border: #d5d5d5;
  --color-surface: #f5f5f5;
  --color-focus: #1a1a1a;
  --color-texture: #fbfbfb;
  --color-highlight: #e8e8e8;
  --color-tooltip-bg: #1a1a1a;
  --color-tooltip-text: #ffffff;
}

[data-theme="dark"] {
  color-scheme: dark;

  --color-bg: #1a1a1a;
  --color-text: #f0f0f0;
  --color-text-secondary: #aaaaaa;
  --color-border: #363636;
  --color-surface: #262626;
  --color-texture: #1c1c1c;
  --color-highlight: #333333;
  --color-focus: #f0f0f0;
  --color-tooltip-bg: #f0f0f0;
  --color-tooltip-text: #1a1a1a;
}

@media (prefers-color-scheme: dark) {
  [data-theme="system"] {
    color-scheme: dark;

    --color-bg: #1a1a1a;
    --color-text: #f0f0f0;
    --color-text-secondary: #aaaaaa;
    --color-border: #363636;
    --color-surface: #262626;
    --color-texture: #1f1f1f;
    --color-highlight: #333333;
    --color-focus: #f0f0f0;
    --color-tooltip-bg: #f0f0f0;
    --color-tooltip-text: #1a1a1a;
  }
}

/* ----------------------------------------------------------------
   Reset
   ---------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

html {
  font-size: calc(100% * var(--font-size-scale, 1));
}

body {
  font-family: "DM Sans", sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 100% 150%, var(--color-bg) 24%, var(--color-texture) 24%, var(--color-texture) 28%, var(--color-bg) 28%, var(--color-bg) 36%, var(--color-texture) 36%, var(--color-texture) 40%, transparent 40%, transparent),
    radial-gradient(circle at 0 150%, var(--color-bg) 24%, var(--color-texture) 24%, var(--color-texture) 28%, var(--color-bg) 28%, var(--color-bg) 36%, var(--color-texture) 36%, var(--color-texture) 40%, transparent 40%, transparent),
    radial-gradient(circle at 50% 100%, var(--color-texture) 10%, var(--color-bg) 10%, var(--color-bg) 23%, var(--color-texture) 23%, var(--color-texture) 30%, var(--color-bg) 30%, var(--color-bg) 43%, var(--color-texture) 43%, var(--color-texture) 50%, var(--color-bg) 50%, var(--color-bg) 63%, var(--color-texture) 63%, var(--color-texture) 71%, transparent 71%, transparent),
    radial-gradient(circle at 100% 50%, var(--color-texture) 5%, var(--color-bg) 5%, var(--color-bg) 15%, var(--color-texture) 15%, var(--color-texture) 20%, var(--color-bg) 20%, var(--color-bg) 29%, var(--color-texture) 29%, var(--color-texture) 34%, var(--color-bg) 34%, var(--color-bg) 44%, var(--color-texture) 44%, var(--color-texture) 49%, transparent 49%, transparent),
    radial-gradient(circle at 0 50%, var(--color-texture) 5%, var(--color-bg) 5%, var(--color-bg) 15%, var(--color-texture) 15%, var(--color-texture) 20%, var(--color-bg) 20%, var(--color-bg) 29%, var(--color-texture) 29%, var(--color-texture) 34%, var(--color-bg) 34%, var(--color-bg) 44%, var(--color-texture) 44%, var(--color-texture) 49%, transparent 49%, transparent);
  background-size: 100px 50px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 300;
}

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

a {
  color: var(--color-text);
  text-decoration-color: var(--color-text-secondary);
  text-underline-offset: 0.15em;
  transition: text-decoration-color 0.15s ease;
}

a:hover {
  text-decoration-color: var(--color-text);
}

/* ----------------------------------------------------------------
   Focus
   ---------------------------------------------------------------- */

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ----------------------------------------------------------------
   Layout
   ---------------------------------------------------------------- */

@media (min-width: 48rem) {
  :root {
    --page-gutter: 5.5rem;
  }
}

main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: var(--page-gutter);
}

/* ----------------------------------------------------------------
   Header
   ---------------------------------------------------------------- */

.site-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.avatar {
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
}

.site-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  margin-top: 1.5rem;
  transition: color 0.15s ease;
}

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

.github-link svg {
  width: 1.125rem;
  height: 1.125rem;
}

/* ----------------------------------------------------------------
   Hero
   ---------------------------------------------------------------- */

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 40rem;
  padding: 3rem 0;
}

.hero h1 {
  font-size: clamp(1.75rem, 3vw + 0.5rem, 2.5rem);
  font-weight: 200;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.hero mark {
  background: transparent;
  color: inherit;
  background-image: linear-gradient(
    to top,
    var(--color-highlight) 0.2em,
    transparent 0.2em
  );
}

.hero p {
  font-size: 1.1875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 36rem;
}

/* ----------------------------------------------------------------
   Experience
   ---------------------------------------------------------------- */

.experience {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
}

@media (min-width: 48rem) {
  .experience {
    gap: 4rem;
  }
}

.experience-logo {
  width: 3rem;
  height: 3rem;
  margin-bottom: 1rem;
}

.experience-dates {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.125rem;
}

.experience-entry {
  max-width: 40rem;
}

.experience-entry h2 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.experience-entry p + p {
  margin-top: 0.5rem;
}

.experience-entry p:not(.experience-dates) {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ----------------------------------------------------------------
   Toolbar
   ---------------------------------------------------------------- */

.toolbar-container {
  position: fixed;
  font-size: calc(1rem / var(--font-size-scale, 1));
  top: calc(var(--page-gutter) / var(--font-size-scale, 1));
  right: calc(var(--page-gutter) / var(--font-size-scale, 1));
  display: flex;
  flex-direction: column;
  gap: 1em;
  z-index: 100;
}

.toolbar {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.toolbar button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.toolbar button:hover {
  background-color: var(--color-surface);
  color: var(--color-text);
}

.toolbar button[aria-pressed="true"] {
  background-color: var(--color-surface);
  color: var(--color-text);
}

.toolbar button[aria-pressed="true"] svg {
  stroke-width: 2.75;
}

.toolbar button[aria-disabled="true"] {
  opacity: 0.4;
  cursor: default;
}

.toolbar button[aria-disabled="true"]:hover {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.toolbar button:first-child {
  border-radius: 7px 7px 0 0;
}

.toolbar button:last-child {
  border-radius: 0 0 7px 7px;
}

.toolbar button:only-child {
  border-radius: 7px;
}

.toolbar button + button {
  border-top: 1px solid var(--color-border);
}

.toolbar button svg {
  width: 16px;
  height: 16px;
}

/* ----------------------------------------------------------------
   Tooltips
   ---------------------------------------------------------------- */

.tooltip {
  position: absolute;
  right: calc(100% + 0.5em);
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  padding: 0.3em 0.5em;
  border-radius: 0.25em;
  background: var(--color-tooltip-bg);
  color: var(--color-tooltip-text);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.toolbar button:hover .tooltip,
.toolbar button:focus-visible .tooltip {
  opacity: 1;
}

/* ----------------------------------------------------------------
   Fade-in Animation
   ---------------------------------------------------------------- */

.fade-in {
  opacity: 0;
  transform: translateY(8px);
}

body.is-loaded .fade-in {
  animation: fadeIn 0.4s ease-out forwards;
  animation-delay: calc(var(--stagger, 0) * 80ms);
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ----------------------------------------------------------------
   Reduced Motion
   ---------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
  }

  body.is-loaded .fade-in {
    animation: none;
  }

  *,
  *::before,
  *::after {
    transition: none;
  }
}