frontend/src/app.css

/* Global styles and the colour system the whole UI shares. */

:root {
  color-scheme: light dark;

  --asf-red: #d22128;
  --asf-red-dark: #a81a20;

  --bg: #f6f7f9;
  --bg-panel: #ffffff;
  --bg-subtle: #eef0f4;
  --bg-hover: #e6e9ef;
  --text: #1c2024;
  --text-muted: #5d6773;
  --text-faint: #8a94a0;
  --border: #d9dee5;
  --border-strong: #b9c2cd;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 12px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 8px 32px rgba(16, 24, 40, 0.18);
  --today: #fff6e5;
  --radius: 6px;

  --chip-bg: hsl(var(--hue, 210) 70% 94%);
  --chip-border: hsl(var(--hue, 210) 55% 70%);
  --chip-text: hsl(var(--hue, 210) 65% 25%);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --bg-panel: #1c2026;
    --bg-subtle: #22272e;
    --bg-hover: #2b323a;
    --text: #e6e9ee;
    --text-muted: #9aa5b1;
    --text-faint: #6d7883;
    --border: #2e353d;
    --border-strong: #414a55;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --today: #3a2f16;

    --chip-bg: hsl(var(--hue, 210) 35% 22%);
    --chip-border: hsl(var(--hue, 210) 45% 42%);
    --chip-text: hsl(var(--hue, 210) 60% 85%);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

#app {
  height: 100%;
}

/* The embed is sized by its content, so the host page can fit an iframe to it
   rather than scrolling inside a fixed box. */
.embedded,
.embedded body,
.embedded #app {
  height: auto;
  background: transparent;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

a {
  color: var(--asf-red);
}

input,
select,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 0.4rem 0.55rem;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--asf-red);
  outline-offset: 1px;
}

textarea {
  resize: vertical;
  min-height: 5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.38rem 0.7rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-panel);
  white-space: nowrap;
}

.btn:hover {
  background: var(--bg-hover);
}

.btn.primary {
  background: var(--asf-red);
  border-color: var(--asf-red);
  color: #fff;
}

.btn.primary:hover {
  background: var(--asf-red-dark);
}

.btn.danger {
  color: var(--asf-red);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.muted {
  color: var(--text-muted);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}