Rackglow

/* Theme variables — accent matches LVGL UI_COLOR_PRIMARY (0x00D9FF). */
:root {
  color-scheme: dark;

  /* Background colors */
  --bg-dark: #07090e;
  --bg-control: #11141c;
  --bg-lighter: #1a1f2b;
  --bg-overlay: rgba(4, 6, 12, 0.72);

  /* Surface (glass) — used over the aurora background */
  --surface: rgba(20, 24, 34, 0.78);
  --surface-elevated: rgba(28, 33, 46, 0.82);
  --surface-sunken: rgba(6, 9, 14, 0.6);
  --surface-border: rgba(255, 255, 255, 0.06);
  --surface-highlight: rgba(255, 255, 255, 0.04);

  /* Border colors */
  --border: #232a38;
  --border-focus: #00d9ff;

  /* Text colors */
  --text-primary: #eaf2f8;
  --text-muted: #8d97aa;

  /* Accent colors — cyan to match the LVGL UI */
  --primary: #00d9ff;
  --primary-dark: #008bb3;
  --primary-glow: rgba(0, 217, 255, 0.35);
  /* Foreground colour for elements sitting on a --primary fill.
     Dark mode: cyan is bright, so near-black reads best.
     Light mode: teal is darker (see override below) — white reads best. */
  --on-primary: #07090e;
  --accent: #ff0080;
  --accent-dark: #cc0066;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  --success: #10b981;
  --warning: #f59e0b;

  /* Aurora background tones */
  --aurora-1: rgba(0, 217, 255, 0.22);
  --aurora-2: rgba(139, 92, 246, 0.20);
  --aurora-3: rgba(255, 0, 128, 0.16);

  /* Dimensions */
  --radius-modal: 18px;
  --radius-button: 10px;
  --radius-card: 14px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-modal: 0 24px 64px rgba(0, 0, 0, 0.55), 0 0 0 1px var(--surface-border);
}

/* Light mode — applied by toggling `.light` on <body>. */
body.light {
  color-scheme: light;

  --bg-dark: #f4f6fb;
  --bg-control: #ffffff;
  --bg-lighter: #eef1f7;
  --bg-overlay: rgba(255, 255, 255, 0.7);

  --surface: rgba(255, 255, 255, 0.78);
  --surface-elevated: rgba(255, 255, 255, 0.92);
  --surface-sunken: rgba(240, 243, 250, 0.85);
  --surface-border: rgba(15, 23, 42, 0.08);
  --surface-highlight: rgba(255, 255, 255, 0.6);

  --border: #d8def0;
  --border-focus: #008bb3;

  --text-primary: #0f172a;
  --text-muted: #5a6478;

  --primary: #008bb3;
  --primary-dark: #006080;
  --primary-glow: rgba(0, 139, 179, 0.30);
  --on-primary: #ffffff;

  /* Lighter, slightly warmer aurora over the pale background. */
  --aurora-1: rgba(0, 217, 255, 0.20);
  --aurora-2: rgba(139, 92, 246, 0.16);
  --aurora-3: rgba(255, 0, 128, 0.12);

  --shadow-card: 0 4px 18px rgba(15, 23, 42, 0.10);
  --shadow-modal: 0 24px 64px rgba(15, 23, 42, 0.18), 0 0 0 1px var(--surface-border);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  min-height: 100vh;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-primary);
  line-height: 1.55;
  background: var(--bg-dark);
  position: relative;
  overflow-x: hidden;
}

/* Aurora background — fixed, behind everything, drifts slowly. */
body::before,
body::after {
  content: '';
  position: fixed;
  inset: -20%;
  z-index: -1;
  pointer-events: none;
  filter: blur(80px);
  opacity: 0.9;
}

body::before {
  background:
    radial-gradient(40% 50% at 15% 20%, var(--aurora-1) 0%, transparent 60%),
    radial-gradient(35% 45% at 85% 30%, var(--aurora-2) 0%, transparent 60%),
    radial-gradient(45% 55% at 50% 90%, var(--aurora-3) 0%, transparent 60%);
  animation: auroraDrift 32s ease-in-out infinite alternate;
}

body::after {
  background:
    radial-gradient(35% 40% at 80% 80%, var(--aurora-2) 0%, transparent 60%),
    radial-gradient(30% 40% at 20% 75%, var(--aurora-3) 0%, transparent 60%);
  animation: auroraDrift 44s ease-in-out -12s infinite alternate-reverse;
  opacity: 0.6;
}

@keyframes auroraDrift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(3%, -2%, 0) scale(1.08); }
  100% { transform: translate3d(-2%, 3%, 0) scale(1.04); }
}

@media (prefers-reduced-motion: reduce) {
  body::before,
  body::after {
    animation: none;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-button);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: transform 0.12s ease, background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
  background: var(--bg-lighter);
  color: var(--text-primary);
  font-family: inherit;
}

.btn:hover {
  background: var(--surface-elevated);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary-glow);
}

.btn:active {
  transform: translateY(1px);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn.active,
.btn.active:hover {
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  color: var(--on-primary);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 14px var(--primary-glow), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary {
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  color: var(--on-primary);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 14px var(--primary-glow), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  color: var(--on-primary);
  filter: brightness(1.08);
}

.btn-danger {
  background: linear-gradient(180deg, var(--danger), var(--danger-dark));
  color: white;
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.30), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn-danger:hover {
  background: linear-gradient(180deg, #f56565, var(--danger));
}

.btn-small {
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
}

/* Form elements */
input, select, textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--surface-sunken);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-button);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

input::placeholder, textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

input:hover, select:hover, textarea:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--surface-elevated);
}

input[type="checkbox"], input[type="radio"] {
  width: auto;
  accent-color: var(--primary);
}

select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'><path fill='%238d97aa' d='M6 8 0 0h12z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 10px 7px;
  padding-right: 2.2rem;
  cursor: pointer;
  /* Tints the OS-level dropdown hover highlight in Chromium so it matches our
     cyan palette instead of the harsh system blue. */
  accent-color: var(--primary);
}

option {
  background: var(--bg-control);
  color: var(--text-primary);
  padding: 0.4rem 0.6rem;
}

option:checked {
  background: var(--primary);
  color: var(--on-primary);
}

/* Range slider */
input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  background: var(--surface-sunken);
  border: 1px solid var(--surface-border);
  height: 10px;
  padding: 0;
  border-radius: 999px;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 2px 10px var(--primary-glow);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 2px 10px var(--primary-glow);
  cursor: pointer;
}

label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-group {
  margin-bottom: 1rem;
}

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 1.4rem;
  margin-bottom: 1rem;
  border: 1px solid var(--surface-border);
  box-shadow: var(--shadow-card), inset 0 1px 0 var(--surface-highlight);
}

@supports (backdrop-filter: blur(1px)) {
  .card {
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
  }
}

.card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

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

.text-small {
  font-size: 0.85rem;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.justify-between { justify-content: space-between; }
.items-center { align-items: center; }

/* Custom scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}

*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.10);
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.18);
  background-clip: padding-box;
}