@layer reset, tokens, base, layout, components, utilities, overrides;

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

@layer tokens {
  :root {
    --color-bg-1: #0c0f14;
    --color-bg-2: #050608;
    --color-ink: #e8edf2;
    --color-ink-soft: #9aa4af;
    --color-accent: #7fb3ff;
    --color-panel: #0f1115;
    --color-panel-border: #1f242c;
    --color-shadow: rgba(0, 0, 0, 0.65);
    --color-input: #0b0d10;
    --color-input-border: #2b3038;
    --color-canvas: #000000;
    --color-danger: #ff4a3d;
    --color-plot-border: rgba(255, 255, 255, 0.08);
    --color-glass: rgba(8, 10, 12, 0.6);

    --font-mono: Consolas, "Courier New", monospace;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 28px;
    --space-8: 32px;

    --radius-1: 8px;
    --radius-2: 10px;
    --radius-3: 12px;
    --radius-4: 16px;
    --radius-round: 999px;

    --shadow-panel: 0 12px 30px var(--color-shadow);
    --shadow-float: 0 8px 18px var(--color-shadow);
    --shadow-inset: inset 0 0 0 1px var(--color-plot-border);

    --header-height: 96px;
    --panel-padding: 18px;
    --panel-gap: 20px;
    --plot-min-height: 520px;
  }
}

@layer base {
  body {
    margin: 0;
    font-family: var(--font-mono);
    color: var(--color-ink);
    background: radial-gradient(1200px 800px at 10% 10%, var(--color-bg-1), transparent),
      radial-gradient(900px 600px at 90% 0%, var(--color-bg-2), transparent),
      #000;
    min-height: 100vh;
  }

  .u-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .u-sub {
    font-size: 0.7em;
    vertical-align: baseline;
    position: relative;
    top: 0.58em;
  }

  .u-link {
    color: inherit;
    text-decoration: none;
  }

  .u-link:visited {
    color: inherit;
  }
}

@layer layout {
  .app-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-content: center;
    column-gap: var(--space-6);
    min-height: var(--header-height);
    padding: var(--space-4) var(--space-7);
    position: sticky;
    top: 0;
    z-index: 5;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
  }

  .header-actions {
    grid-column: 2;
    grid-row: 1 / 3;
    display: flex;
    align-items: center;
    gap: var(--space-6);
  }

  .related-apps {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .layout {
    display: grid;
    grid-template-columns: minmax(280px, 360px) 1.2fr 0.8fr;
    gap: var(--panel-gap);
    padding: var(--space-4) var(--space-6) var(--space-7) var(--space-6);
    min-height: calc(100vh - var(--header-height));
  }

  .page-indicator {
    display: none;
    gap: var(--space-2);
    padding: 0 var(--space-4) var(--space-3) var(--space-4);
  }

  .l-sticky {
    position: sticky;
    top: var(--header-height);
    align-self: start;
  }

  .bugs-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
  }

  .mode-toggle {
    display: flex;
    gap: var(--space-4);
    font-size: 14px;
  }

  .airfoil-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  .viscous-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    margin-top: var(--space-2);
    font-size: 14px;
  }

  .sweep-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-2);
    margin-top: var(--space-3);
    font-size: 12px;
  }

  .sweep-actions {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-3);
  }

  .run-cases {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-2);
  }

  .plot-wrap {
    position: relative;
    display: flex;
    overflow: hidden;
    height: calc(100vh - 140px);
    min-height: var(--plot-min-height);
  }

  .plot-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    flex: 1;
    min-height: 0;
  }

  .plot-frame {
    position: relative;
    display: flex;
    flex: 1 1 0;
    min-height: 0;
  }

  .plot-frame--cp {
    flex: 0 0 34%;
    min-height: 200px;
  }

  .side-plots {
    height: calc(100vh - 140px);
    min-height: min-content;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

  .plot-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
  }

  .airfoil-source-box {
    position: relative;
  }
}

@layer components {
  .c-title {
    margin: 0 0 var(--space-1) 0;
    font-size: 28px;
    letter-spacing: 0.5px;
  }

  .c-subtitle {
    color: var(--color-ink-soft);
    margin: 0;
    font-size: 14px;
  }

  .c-element-link {
    display: flex;
    flex: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    gap: 3px;
    border: 1px solid #526780;
    border-radius: 3px;
    background: #141e2b;
    color: var(--color-accent);
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
  }

  .c-element-symbol {
    font: 600 24px/1 var(--font-mono);
  }

  .c-element-name {
    font: 8px/1.2 sans-serif;
    color: #b9c9df;
  }

  .c-element-link:hover {
    background: #203047;
    border-color: var(--color-accent);
  }

  .c-element-link:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
  }

  .c-bugs-text {
    flex: 1 1 auto;
  }

  .c-panel {
    background: var(--color-panel);
    border-radius: var(--radius-4);
    box-shadow: var(--shadow-panel);
    padding: var(--panel-padding);
    border: 1px solid var(--color-panel-border);
  }

  .c-github-star {
    display: inline-block;
    text-align: right;
  }

  .c-github-star--mobile {
    display: none;
    margin-top: var(--space-3);
  }

  .c-github-note {
    margin-top: var(--space-1);
    font-size: 11px;
    color: var(--color-ink-soft);
    white-space: nowrap;
  }

  .c-github-note--wrap {
    white-space: normal;
    max-width: 220px;
  }

  .c-mobile-note {
    display: none;
  }

  .c-tabs-button {
    flex: 1 1 0;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-round);
    border: 1px solid var(--color-panel-border);
    background: rgba(8, 10, 12, 0.6);
    color: var(--color-ink-soft);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
  }

  .c-tabs-button.active {
    color: var(--color-ink);
    border-color: rgba(127, 179, 255, 0.8);
    background: rgba(16, 24, 36, 0.85);
    box-shadow: 0 0 0 1px rgba(127, 179, 255, 0.35);
  }

  .c-panel-icon-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-2);
    border: 1px solid var(--color-panel-border);
    background: rgba(8, 10, 12, 0.6);
    color: var(--color-ink);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 0;
  }

  .c-panel-icon-btn:hover {
    border-color: rgba(127, 179, 255, 0.8);
    box-shadow: 0 0 0 1px rgba(127, 179, 255, 0.35);
  }

  .c-panel-icon {
    width: 18px;
    height: 18px;
    display: block;
  }

  .c-control-group {
    margin-bottom: var(--space-4);
  }

  .c-control-label {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    margin-bottom: var(--space-1);
  }

  .c-inline-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 14px;
  }

  .c-stack-label {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
  }

  .c-box {
    border: 1px solid var(--color-panel-border);
    border-radius: var(--radius-3);
    padding: var(--space-3);
    background: rgba(12, 14, 18, 0.85);
  }

  .c-input {
    padding: 6px 8px;
    border-radius: var(--radius-1);
    border: 1px solid var(--color-input-border);
    background: var(--color-input);
    color: var(--color-ink);
    font-family: inherit;
  }

  .c-input--text {
    flex: 1;
    min-width: 0;
  }

  .c-input--compact {
    width: 140px;
  }

  .c-input--full {
    width: 100%;
  }

  .c-select {
    width: 100%;
    padding: 6px 8px;
    border-radius: var(--radius-1);
    border: 1px solid var(--color-input-border);
    background: var(--color-input);
    color: var(--color-ink);
    font-family: inherit;
  }

  .c-range {
    width: 100%;
  }

  .c-button {
    padding: 8px 12px;
    border-radius: var(--radius-2);
    border: 1px solid var(--color-input-border);
    background: var(--color-input);
    color: var(--color-ink);
    cursor: pointer;
    font-family: inherit;
  }

  .c-button--mini {
    min-width: 36px;
    padding: 6px 8px;
  }

  .c-color {
    width: 32px;
    height: 28px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
  }

  .c-status-text {
    margin-top: var(--space-1);
    font-size: 12px;
    color: rgba(230, 236, 244, 0.75);
  }

  .c-status-text.error {
    color: var(--color-danger);
  }

  .c-run-case-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--space-2);
    align-items: center;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-2);
    border: 1px solid var(--color-panel-border);
    background: rgba(8, 10, 12, 0.35);
    cursor: pointer;
  }

  .c-run-case-item.active {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 1px rgba(127, 179, 255, 0.6);
  }

  .c-run-case-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    font-size: 12px;
    color: var(--color-ink-soft);
  }

  .c-run-case-title {
    color: var(--color-ink);
    font-size: 13px;
    background: transparent;
    border: none;
    font-family: inherit;
    padding: 0;
  }

  .c-run-case-title:focus {
    outline: none;
  }

  .c-canvas {
    width: 100%;
    height: 100%;
    display: block;
    min-width: 0;
    min-height: 0;
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--radius-4);
    background: var(--color-canvas);
    box-shadow: var(--shadow-inset);
    flex: 0 0 auto;
  }

  .c-canvas--frame {
    position: relative;
    z-index: 1;
    flex: 1 1 auto;
    min-height: 0;
  }

  .c-canvas--main {
    flex: 1 1 0;
    min-height: 280px;
  }

  .c-canvas--cp {
    min-height: 200px;
  }

  .c-canvas--side {
    flex: 1 1 0;
    min-height: 200px;
  }

  .c-plot-btn {
    position: absolute;
    z-index: 5;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-3);
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(8, 10, 12, 0.75);
    color: rgba(230, 236, 244, 0.9);
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, opacity 0.2s ease;
    backdrop-filter: blur(6px);
    touch-action: manipulation;
  }

  .c-plot-btn:hover {
    background: rgba(29, 33, 41, 0.85);
    transform: translateY(-1px);
  }

  .c-plot-btn:disabled {
    cursor: default;
    opacity: 0.35;
    transform: none;
  }

  .c-plot-btn--edit {
    top: 12px;
    left: 12px;
    height: 36px;
    min-width: 36px;
    padding: 0 8px;
  }

  .c-plot-btn--download {
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    padding: 0;
  }

  .c-plot-btn--smooth {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.96);
  }

  .plot-frame.editing .c-plot-btn--smooth {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .plot-frame.editing .c-canvas {
    cursor: default;
  }

  .c-plot-btn.active {
    background: rgba(47, 123, 255, 0.9);
    border-color: rgba(47, 123, 255, 0.9);
    color: #ffffff;
  }

  .c-plot-icon {
    width: 18px;
    height: 18px;
    display: block;
  }

  .c-plot-icon--stroke {
    fill: none;
    stroke: currentColor;
    stroke-width: 2px;
    stroke-linecap: round;
    stroke-linejoin: round;
  }

  .c-data-box {
    position: absolute;
    right: var(--space-4);
    top: var(--space-4);
    background: rgba(8, 10, 12, 0.6);
    padding: var(--data-box-pad-y, 12px) var(--data-box-pad-x, 14px);
    border-radius: var(--radius-3);
    font-size: var(--data-box-font, 24px);
    z-index: 2;
    color: var(--color-ink);
    line-height: 1.35;
    width: var(--data-box-width, 220px);
    box-shadow: var(--shadow-float);
    pointer-events: none;
  }

  .c-hover-box {
    background: rgba(8, 10, 12, 0.6);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-3);
    font-size: 14px;
    color: var(--color-ink);
    box-shadow: var(--shadow-float);
    flex-shrink: 0;
  }

  .c-data-row {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
  }

  .c-data-row[hidden] {
    display: none;
  }

  .c-data-row--name {
    justify-content: flex-start;
  }

  .c-data-row--notice {
    justify-content: flex-start;
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-danger);
    margin-top: var(--space-2);
  }
}

@layer utilities {
  .u-bottom-right {
    top: auto;
    bottom: var(--space-3);
    right: var(--space-3);
  }

  .u-right {
    left: auto;
    right: 60px;
  }

  .u-right-second {
    right: 108px;
  }

  .u-bottom {
    top: auto;
    bottom: var(--space-3);
  }
}

@layer overrides {
  @media (max-width: 900px) {
    .app-header {
      column-gap: var(--space-3);
      padding: var(--space-3) var(--space-4);
    }

    .app-header .c-title {
      margin-bottom: var(--space-1);
      font-size: 24px;
      line-height: 1;
    }

    .app-header .c-subtitle {
      padding: 0;
      background: none;
      font-size: 10px;
    }

    .related-apps {
      gap: var(--space-1);
    }

    .c-element-link {
      width: 44px;
      height: 44px;
      gap: 2px;
    }

    .c-element-symbol {
      font-size: 20px;
    }

    .c-element-name {
      font-size: 7px;
    }

    .c-github-star--desktop {
      display: none;
    }

    .c-github-star--mobile {
      display: inline-block;
      margin-top: 0;
    }

    .c-mobile-note {
      display: inline;
      margin-left: var(--space-2);
      font-size: 11px;
      color: var(--color-ink-soft);
      white-space: normal;
    }

    .c-title {
      margin-bottom: 0;
      white-space: nowrap;
    }

    .c-subtitle {
      max-width: 220px;
      padding: var(--space-2) var(--space-3);
      border-radius: var(--radius-2);
      background: rgba(8, 10, 12, 0.55);
      font-size: 11px;
      line-height: 1.35;
      margin: 0;
    }

    .layout {
      grid-template-columns: none;
      display: flex;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      scroll-padding: var(--space-4);
      padding: var(--space-4) var(--space-4) var(--space-6) var(--space-4);
      gap: var(--space-4);
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }

    .layout::-webkit-scrollbar {
      display: none;
    }

    .page-indicator {
      display: flex;
      position: sticky;
      top: var(--header-height);
      z-index: 4;
      background: rgba(0, 0, 0, 0.7);
      backdrop-filter: blur(6px);
      padding-top: var(--space-2);
      margin-top: calc(-1 * var(--space-2));
    }

    .c-panel {
      flex: 0 0 100%;
      scroll-snap-align: start;
    }

    .l-sticky {
      position: relative;
      top: auto;
    }

    .plot-wrap {
      height: calc(100vh - 190px);
      min-height: 0;
    }

    .c-canvas--main {
      flex: 0 0 auto;
      height: auto;
      aspect-ratio: 5 / 1;
    }

    .plot-stack {
      gap: var(--space-2);
    }

    .plot-frame--cp {
      flex: 0 0 40%;
      min-height: 190px;
    }

    .c-plot-btn--download {
      display: none;
    }

    .u-right {
      right: var(--space-3);
    }

    .u-right-second {
      right: calc(var(--space-3) + 36px + var(--space-3));
    }

    .side-plots {
      height: calc(100vh - 190px);
      gap: var(--space-3);
    }

    .c-canvas--side {
      min-height: 180px;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .c-element-link {
      transition: none;
    }
  }
}