@layer reset, base, components, utilities;

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  body,
  h1,
  h2,
  p,
  ol,
  fieldset {
    margin: 0;
  }

  button,
  input,
  select {
    font: inherit;
  }

  button {
    cursor: pointer;
  }
}

@layer base {
  :root {
    --bg: #f5f7f3;
    --panel: #ffffff;
    --panel-muted: #eef2eb;
    --text: #172018;
    --muted: #637064;
    --line: #d8dfd5;
    --accent: #1d8f5f;
    --accent-strong: #116a45;
    --danger: #c73535;
    --danger-soft: #ffe9e9;
    --shadow: 0 14px 36px rgba(31, 46, 34, 0.09);
    --radius: 8px;
    --gap: 1rem;
  }

  html {
    color-scheme: light;
  }

  body {
    min-block-size: 100vh;
    background:
      radial-gradient(circle at top left, rgba(29, 143, 95, 0.14), transparent 28rem),
      var(--bg);
    color: var(--text);
    font-family:
      Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
      sans-serif;
    line-height: 1.5;
  }

  code {
    border-radius: 4px;
    background: var(--panel-muted);
    padding: 0.1rem 0.25rem;
  }

  label,
  legend {
    color: var(--text);
    font-weight: 700;
  }

  label {
    display: grid;
    gap: 0.45rem;
  }

  label span,
  legend {
    font-size: 0.88rem;
  }

  input[type="text"],
  select {
    inline-size: 100%;
    min-block-size: 2.65rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    padding: 0.6rem 0.75rem;
  }

  input[type="range"] {
    inline-size: 100%;
    accent-color: var(--accent);
  }

  input[type="color"] {
    inline-size: 100%;
    min-block-size: 2.75rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    padding: 0.2rem;
  }

  input:focus-visible,
  button:focus-visible,
  select:focus-visible {
    outline: 3px solid rgba(29, 143, 95, 0.35);
    outline-offset: 2px;
  }
}

@layer components {
  .app-header,
  .app-footer,
  .app-shell {
    inline-size: min(1180px, calc(100% - 2rem));
    margin-inline: auto;
  }

  .app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gap);
    padding-block: 1.3rem 1rem;
  }

  .eyebrow {
    color: var(--accent-strong);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  h1 {
    font-size: clamp(1.55rem, 3vw, 2.5rem);
    line-height: 1.1;
  }

  h2 {
    font-size: 1rem;
    line-height: 1.2;
  }

  .app-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
    gap: var(--gap);
    align-items: start;
  }

  .panel {
    display: grid;
    gap: var(--gap);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow);
    padding: 1rem;
  }

  .preview-panel,
  .animation-panel,
  .log-panel {
    grid-column: 1 / -1;
  }

  .section-header {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: var(--gap);
  }

  .section-header p,
  .app-footer,
  .field-help,
  .hardware-note {
    color: var(--muted);
    font-size: 0.9rem;
  }

  .connection-bar,
  .button-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem;
  }

  .status-pill {
    display: inline-flex;
    align-items: center;
    min-block-size: 2.45rem;
    gap: 0.5rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    padding: 0.45rem 0.8rem;
    color: var(--muted);
    font-weight: 800;
  }

  .status-dot {
    inline-size: 0.7rem;
    block-size: 0.7rem;
    border-radius: 50%;
    background: #98a399;
  }

  .status-pill[data-status="connected"] .status-dot {
    background: var(--accent);
  }

  .status-pill[data-status="connecting"] .status-dot {
    background: #d49519;
  }

  .status-pill[data-status="error"] .status-dot {
    background: var(--danger);
  }

  .button {
    min-block-size: 2.45rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    padding: 0.55rem 0.85rem;
    font-weight: 800;
  }

  .button:hover:not(:disabled) {
    border-color: var(--accent);
  }

  .button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
  }

  .button.primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
  }

  .button.danger {
    border-color: var(--danger);
    background: var(--danger-soft);
    color: var(--danger);
  }

  .button.wide {
    inline-size: 100%;
  }

  .device-output {
    display: grid;
    justify-items: end;
    gap: 0.35rem;
    color: var(--muted);
    font-weight: 800;
  }

  .output-swatch {
    inline-size: 4rem;
    block-size: 2.4rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ff2a2a;
  }

  .strip-preview {
    display: grid;
    grid-template-columns: repeat(var(--segment-count, 16), minmax(0, 1fr));
    gap: 0.3rem;
    min-block-size: 5.5rem;
    border-radius: var(--radius);
    background: #172018;
    padding: 0.45rem;
    overflow: hidden;
  }

  .strip-segment {
    min-block-size: 4.6rem;
    border: 0;
    border-radius: 6px;
    background: var(--segment-color, #ff2a2a);
    box-shadow:
      inset 0 0 0 1px rgba(255, 255, 255, 0.16),
      0 0 18px var(--segment-color, #ff2a2a);
  }

  .notice {
    border: 1px solid #e2b047;
    border-radius: var(--radius);
    background: #fff6d8;
    color: #6a4b00;
    padding: 0.75rem;
    font-weight: 700;
  }

  .checkbox-line {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-weight: 700;
  }

  .checkbox-line input {
    inline-size: 1.1rem;
    block-size: 1.1rem;
    accent-color: var(--accent);
  }

  .color-controls,
  .control-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
  }

  .color-picker-label,
  .field-help,
  .color-controls label:nth-of-type(n + 3) {
    grid-column: 1 / -1;
  }

  .preset-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .preset {
    position: relative;
    min-block-size: 2.55rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background:
      linear-gradient(rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.82)),
      var(--preset-color);
    color: var(--text);
    font-weight: 800;
  }

  .preset::before {
    content: "";
    position: absolute;
    inset-block: 0.45rem;
    inset-inline-start: 0.45rem;
    inline-size: 0.42rem;
    border-radius: 999px;
    background: var(--preset-color);
  }

  .palette-editor {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0.6rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.9rem;
  }

  .palette-editor legend {
    padding-inline: 0.35rem;
  }

  .palette-editor label {
    gap: 0.25rem;
  }

  .hardware-note {
    border-inline-start: 4px solid var(--accent);
    padding-inline-start: 0.8rem;
  }

  .log-panel ol {
    display: grid;
    gap: 0.45rem;
    max-block-size: 14rem;
    overflow: auto;
    padding-inline-start: 1.25rem;
  }

  .log-panel li {
    color: var(--muted);
    font-family:
      "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.84rem;
  }

  .log-panel li strong {
    color: var(--text);
  }

  .app-footer {
    padding-block: 1rem 1.5rem;
  }
}

@layer utilities {
  [hidden] {
    display: none !important;
  }

  @media (max-width: 860px) {
    .app-header,
    .section-header {
      align-items: stretch;
      flex-direction: column;
    }

    .app-shell {
      grid-template-columns: 1fr;
    }

    .device-output {
      justify-items: start;
    }
  }

  @media (max-width: 620px) {
    .app-header,
    .app-footer,
    .app-shell {
      inline-size: min(100% - 1rem, 1180px);
    }

    .color-controls,
    .control-grid,
    .preset-grid,
    .palette-editor {
      grid-template-columns: 1fr;
    }

    .strip-preview {
      gap: 0.18rem;
      min-block-size: 4.8rem;
    }

    .strip-segment {
      min-block-size: 3.9rem;
    }
  }

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