@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600&display=swap');

:root {
  color-scheme: light dark;

  /* Semantic colors using light-dark() */
  --color-bg: light-dark(#ebe6d5, #1a1a1a);
  --color-bg-alt: light-dark(#f5f2e8, #242424);
  --color-bg-section: light-dark(#dfd9c3, #121212);
  --color-text: light-dark(#3d3929, #e8e4d9);
  --color-text-soft: light-dark(#5c5647, #c4c0b5);
  --color-text-muted: light-dark(#8a8475, #8a877d);
  --color-border: light-dark(#3d3929, #8a877d);
  --color-border-soft: light-dark(#8a8475, #4a4740);

  --color-accent: light-dark(#8b4513, #d4915a);
  --color-accent-content: light-dark(#ebe6d5, #1a1a1a);

  /* Typography */
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Consolas', monospace;

  /* Layout */
  --border-width: 1px;
  --section-gap: 2rem;
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.6;
  background-color: var(--color-bg);
  color: var(--color-text);
  margin: 0;
  padding: 0;
}

a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-soft);
  transition: border-color 0.2s;

  &:hover {
    border-color: var(--color-border);
  }
}

/* Layout */
.body-content {
  display: grid;
  grid-template-areas: "aside main";
  grid-template-columns: 320px 1fr;
  margin: 0;
  min-height: 100vh;

  @media only screen and (max-width: 768px) {
    grid-template-columns: 1fr;
    grid-template-areas:
      "aside"
      "main";
  }
}

/* Aside / Sidebar */
aside {
  grid-area: aside;
  background-color: var(--color-bg-section);
  border-right: var(--border-width) solid var(--color-border);
  padding: 2rem;
  display: flex;
  flex-direction: column;

  @media only screen and (max-width: 768px) {
    border-right: none;
    border-bottom: var(--border-width) solid var(--color-border);
  }

  .header-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
  }

  .avatar {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;

    img {
      border-radius: 0;
      width: 80px;
      height: 80px;
      object-fit: cover;
      border: var(--border-width) solid var(--color-border);
    }
  }

  .name {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: var(--border-width) solid var(--color-border);

    h1 {
      font-size: 1.25rem;
      font-weight: 500;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      margin: 0 0 0.25rem 0;
    }

    p {
      font-size: 11px;
      text-transform: uppercase;
      letter-spacing: 0.15em;
      color: var(--color-text-muted);
      margin: 0;
    }
  }

  .section {
    margin-bottom: 1.5rem;

    h2 {
      font-size: 10px;
      font-weight: 500;
      text-transform: uppercase;
      letter-spacing: 0.2em;
      color: var(--color-text-muted);
      margin: 0 0 0.75rem 0;
      padding-bottom: 0.5rem;
      border-bottom: var(--border-width) solid var(--color-border-soft);
    }

    .items {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      font-size: 13px;

      a, span {
        display: block;
      }
    }
  }

  .section-code {
    font-size: 10px;
    color: var(--color-text-muted);
    margin-top: auto;
    padding-top: 2rem;
    border-top: var(--border-width) solid var(--color-border-soft);
    text-transform: uppercase;
    letter-spacing: 0.15em;
  }
}

/* Main Content */
main {
  grid-area: main;
  background-color: var(--color-bg);
  padding: 2rem 3rem;
  position: relative;

  .page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: var(--border-width) solid var(--color-border);

    .page-title {
      h1 {
        font-size: 2rem;
        font-weight: 500;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin: 0;
        line-height: 1.2;
      }

      .subtitle {
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 0.15em;
        color: var(--color-text-muted);
        margin-top: 0.5rem;
      }
    }

    .page-code {
      font-size: 10px;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--color-text-muted);
      text-align: right;
    }
  }

  .content-section {
    margin-bottom: var(--section-gap);
    padding-bottom: var(--section-gap);
    border-bottom: var(--border-width) solid var(--color-border-soft);

    &:last-child {
      border-bottom: none;
    }
  }

  .intro-text {
    font-size: 13px;
    line-height: 1.8;
    max-width: 600px;
    color: var(--color-text-soft);
  }

  h2 {
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin: 0 0 1rem 0;
  }

  h3 {
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
    margin: 1.5rem 0 0.75rem 0;
  }

  .item-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;

    .item {
      font-size: 12px;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.25rem 0;

      &::before {
        content: '—';
        color: var(--color-text-muted);
      }
    }
  }

  .lang-logo {
    width: 1em;
    height: 1em;
    opacity: 0.8;
  }
}

/* Grid decoration */
.dot-grid {
  position: absolute;
  top: 2rem;
  right: 2rem;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 8px;

  .dot {
    width: 3px;
    height: 3px;
    background-color: var(--color-border-soft);
    border-radius: 50%;
  }
}

/* Speed Reader */
.speed-reader {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  height: 100%;
}

.speed-reader .input-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;

  label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
  }
}

.speed-reader .input-section textarea {
  width: 100%;
  min-height: 150px;
  padding: 1rem;
  border: var(--border-width) solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 13px;
  resize: vertical;
}

.speed-reader .input-section textarea:focus {
  outline: none;
  border-color: var(--color-text);
}

.speed-reader .controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  padding: 1rem 0;
  border-top: var(--border-width) solid var(--color-border-soft);
  border-bottom: var(--border-width) solid var(--color-border-soft);
}

.speed-reader .speed-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;

  label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
  }
}

.speed-reader .speed-control input[type="range"] {
  width: 120px;
  height: 2px;
  background: var(--color-border);
  appearance: none;
  cursor: pointer;

  &::-webkit-slider-thumb {
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--color-text);
    cursor: pointer;
  }
}

.speed-reader .speed-control .wpm-value {
  min-width: 4rem;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
}

.speed-reader .btn {
  padding: 0.5rem 1.25rem;
  border: var(--border-width) solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all 0.2s;
  min-width: 6rem;

  &:hover {
    background: var(--color-text);
    color: var(--color-bg);
  }
}

.speed-reader .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;

  &:hover {
    background: transparent;
    color: var(--color-text);
  }
}

.speed-reader .display-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 140px;
  border: var(--border-width) solid var(--color-border);
  background: var(--color-bg-alt);
  position: relative;
}

.speed-reader .word-display {
  font-size: 2.5rem;
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.05em;
  user-select: none;
}

.speed-reader .word-display .before {
  color: inherit;
}

.speed-reader .word-display .focus {
  color: var(--color-accent);
}

.speed-reader .word-display .after {
  color: inherit;
}

.speed-reader .focus-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--color-border-soft);
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

.speed-reader .progress-info {
  margin-top: 1rem;
  font-size: 11px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.speed-reader .status {
  font-size: 10px;
  padding: 0.25rem 0.75rem;
  border: var(--border-width) solid var(--color-border);
  background: transparent;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  min-width: 5rem;
  text-align: center;
}

.speed-reader .status.playing {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

.speed-reader .status.paused {
  background: transparent;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .speed-reader .word-display {
    font-size: 1.75rem;
  }

  main {
    padding: 1.5rem;
  }
}

/* Utility classes */
.text-center {
  text-align: center;
}

.uppercase {
  text-transform: uppercase;
}

/* Footer decoration */
.footer-line {
  margin-top: auto;
  padding-top: 2rem;
  border-top: var(--border-width) solid var(--color-border-soft);
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
}