:root {
  --ui-font-sans: "Quicksand", sans-serif;

  --ui-app-bg:
    radial-gradient(1100px 560px at 14% -4%, rgba(80, 170, 255, 0.12), transparent 58%),
    radial-gradient(900px 520px at 92% 6%, rgba(44, 160, 127, 0.11), transparent 56%),
    linear-gradient(180deg, #f5f8fc 0%, #edf4fb 100%);
  --ui-main-bg: rgba(255, 255, 255, 0.88);
  --ui-shell-bg: linear-gradient(135deg, #eef6ff 0%, #fbfff8 100%);
  --ui-shell-hero-bg: linear-gradient(135deg, #17407b 0%, #1f6f88 52%, #2ca07f 100%);
  --ui-shell-hero-subtle: rgba(255, 255, 255, 0.14);

  --ui-surface-1: #ffffff;
  --ui-surface-2: rgba(98, 122, 147, 0.05);
  --ui-surface-3: rgba(98, 122, 147, 0.08);
  --ui-surface-4: rgba(255, 255, 255, 0.12);
  --ui-preview-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(98, 122, 147, 0.06));

  --ui-ink-strong: #17324d;
  --ui-ink-soft: #627a93;
  --ui-ink-muted: var(--ui-ink-soft);
  --ui-ink-inverse: #ffffff;
  --ui-border-soft: rgba(98, 122, 147, 0.18);
  --ui-border-strong: rgba(98, 122, 147, 0.3);

  --ui-accent-primary: #2a6cf0;
  --ui-accent-primary-2: #5d90ff;
  --ui-accent-secondary: #20b486;
  --ui-accent-secondary-2: #149a74;
  --ui-accent-warning: #ffb347;
  --ui-accent-warning-2: #ff8c42;
  --ui-accent-danger: #bb2d3b;
  --ui-accent-info: #138ac7;
  --ui-accent-purple: #755bff;
  --ui-accent-purple-2: #5639d5;
  --ui-accent-rose: #ff7b9b;
  --ui-accent-rose-2: #d94867;
  --ui-accent-gold: #f7b731;

  --ui-status-success-fg: #0f8c66;
  --ui-status-success-bg: rgba(32, 180, 134, 0.16);
  --ui-status-warning-fg: #bf7b00;
  --ui-status-warning-bg: rgba(255, 193, 7, 0.18);
  --ui-status-danger-fg: #bb2d3b;
  --ui-status-danger-bg: rgba(220, 53, 69, 0.14);
  --ui-status-info-fg: #0f79b4;
  --ui-status-info-bg: rgba(13, 110, 253, 0.12);
  --ui-status-muted-fg: #627a93;
  --ui-status-muted-bg: rgba(98, 122, 147, 0.12);

  --ui-radius-xs: 0.7rem;
  --ui-radius-sm: 1rem;
  --ui-radius-md: 1.35rem;
  --ui-radius-lg: 1.7rem;
  --ui-radius-xl: 2rem;
  --ui-radius-pill: 999px;

  --ui-shadow-sm: 0 10px 24px rgba(8, 29, 53, 0.08);
  --ui-shadow-md: 0 12px 28px rgba(8, 29, 53, 0.08);
  --ui-shadow-lg: 0 18px 34px rgba(8, 29, 53, 0.18);
  --ui-shadow-xl: 0 20px 40px rgba(8, 29, 53, 0.16);

  --ui-motion-fast: 0.18s ease;
  --ui-motion-base: 0.28s ease;
  --ui-motion-slow: 0.36s ease;
}

html[data-bs-theme="dark"] {
  --ui-app-bg:
    radial-gradient(1100px 560px at 14% -4%, rgba(80, 170, 255, 0.12), transparent 58%),
    radial-gradient(900px 520px at 92% 6%, rgba(44, 160, 127, 0.1), transparent 56%),
    linear-gradient(180deg, #101821 0%, #0b121a 100%);
  --ui-main-bg: rgba(8, 21, 38, 0.9);
  --ui-shell-bg: linear-gradient(135deg, #081624 0%, #0d1f32 100%);
  --ui-shell-hero-bg: linear-gradient(135deg, #16335d 0%, #0f5672 52%, #16786d 100%);
  --ui-shell-hero-subtle: rgba(255, 255, 255, 0.1);

  --ui-surface-1: rgba(9, 22, 39, 0.92);
  --ui-surface-2: rgba(169, 191, 214, 0.06);
  --ui-surface-3: rgba(169, 191, 214, 0.1);
  --ui-surface-4: rgba(255, 255, 255, 0.08);
  --ui-preview-bg: linear-gradient(180deg, rgba(9, 22, 39, 0.98), rgba(98, 122, 147, 0.08));

  --ui-ink-strong: #eef6ff;
  --ui-ink-soft: #aac0d7;
  --ui-ink-muted: var(--ui-ink-soft);
  --ui-border-soft: rgba(169, 191, 214, 0.18);
  --ui-border-strong: rgba(169, 191, 214, 0.3);

  --ui-shadow-sm: 0 12px 26px rgba(0, 0, 0, 0.24);
  --ui-shadow-md: 0 14px 30px rgba(0, 0, 0, 0.26);
  --ui-shadow-lg: 0 18px 34px rgba(0, 0, 0, 0.32);
  --ui-shadow-xl: 0 24px 44px rgba(0, 0, 0, 0.34);
}