:root {
  color-scheme: light;
  --bg: #eef3f9;
  --bg-accent:
    radial-gradient(circle at top left, rgba(78, 126, 255, 0.18), transparent 32%),
    radial-gradient(circle at top right, rgba(29, 194, 167, 0.14), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, #eef3f9 100%);
  --text: #102033;
  --muted: #5d6b80;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-soft: rgba(255, 255, 255, 0.74);
  --border: rgba(133, 152, 180, 0.28);
  --border-strong: rgba(121, 143, 176, 0.42);
  --link: #295fd6;
  --input-bg: rgba(255, 255, 255, 0.84);
  --input-text: #102033;
  --badge-bg: #e8eefb;
  --badge-text: #21436f;
  --thumb-bg: rgba(240, 245, 255, 0.92);
  --thumb-border: rgba(122, 145, 184, 0.26);
  --hover-bg: rgba(89, 123, 180, 0.1);
  --shadow: 0 24px 60px rgba(37, 53, 83, 0.12);
  --header-shadow: 0 16px 40px rgba(37, 53, 83, 0.08);
  --progress-bg: #dce7fb;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #08111d;
  --bg-accent:
    radial-gradient(circle at top left, rgba(91, 125, 255, 0.22), transparent 28%),
    radial-gradient(circle at top right, rgba(19, 193, 154, 0.12), transparent 25%),
    linear-gradient(180deg, #0a1018 0%, #08111d 100%);
  --text: #f4f7fb;
  --muted: #9eacc0;
  --surface: rgba(12, 19, 32, 0.84);
  --surface-soft: rgba(17, 26, 39, 0.74);
  --border: rgba(92, 113, 148, 0.28);
  --border-strong: rgba(112, 136, 176, 0.36);
  --link: #9fc0ff;
  --input-bg: rgba(8, 15, 26, 0.82);
  --input-text: #f4f7fb;
  --badge-bg: #1a2536;
  --badge-text: #e5efff;
  --thumb-bg: #0c121b;
  --thumb-border: rgba(84, 108, 148, 0.32);
  --hover-bg: rgba(31, 47, 70, 0.68);
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.34);
  --header-shadow: 0 18px 42px rgba(0, 0, 0, 0.18);
  --progress-bg: rgba(41, 79, 143, 0.35);
}

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

body {
  background: var(--bg-accent);
  background-attachment: fixed;
  color: var(--text);
  transition: background-color 0.25s ease, color 0.25s ease;
}

a,
a:hover {
  color: var(--link);
}

.text-muted,
.form-text,
.muted-text {
  color: var(--muted) !important;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow);
}

.btn {
  border-radius: 12px;
}

.btn-ghost {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-ghost:hover,
.btn-ghost:focus {
  background: var(--hover-bg);
  border-color: var(--border-strong);
  color: var(--text);
}

.form-control,
.form-select {
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--input-text);
}

.form-control:focus,
.form-select:focus {
  background: var(--input-bg);
  color: var(--input-text);
  border-color: rgba(74, 121, 230, 0.65);
  box-shadow: 0 0 0 0.25rem rgba(66, 112, 222, 0.14);
}

.form-control::placeholder {
  color: var(--muted);
}

.theme-table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--text);
  --bs-table-border-color: var(--border);
  --bs-table-hover-color: var(--text);
  --bs-table-hover-bg: var(--hover-bg);
}

.theme-table thead th,
.theme-table td {
  color: var(--text);
  border-color: var(--border);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  box-shadow: var(--header-shadow);
  backdrop-filter: blur(12px);
}

.theme-toggle:hover,
.theme-toggle:focus {
  background: var(--hover-bg);
  border-color: var(--border-strong);
  color: var(--text);
}

.theme-toggle-label {
  font-size: 0.9rem;
  font-weight: 600;
}

.theme-toggle-icon {
  width: 1.2rem;
  text-align: center;
}

.page-topbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1rem;
}

.theme-progress {
  background: var(--progress-bg);
}

#uploadSpeed {
  color: var(--muted) !important;
}

@media (max-width: 576px) {
  .theme-toggle-label {
    display: none;
  }
}