:root {
  /* Modern dark palette tokens */
  --wt-bg-main: #0F1116;
  --wt-bg-elevated: #1A1D24;
  --wt-bg-elevated-2: #1F222A;

  --wt-border-subtle: #2A2E38;
  --wt-border-strong: #3A3F4A;

  --wt-text-primary: #FFFFFF;
  --wt-text-secondary: #D0D3DA;
  --wt-text-muted: #8A8F99;
  --wt-text-accent: var(--color-accent);

  --wt-primary: #7B61FF;
  --wt-primary-hover: #967DFF;
  --wt-primary-active: #674DDB;

  --wt-success: #3CCF7C;
  --wt-warning: #F6C945;
  --wt-danger:  #FF5353;

  --wt-row-hover: rgba(123, 97, 255, 0.08);
  --wt-sidebar-hover: rgba(123, 97, 255, 0.15);

  /* Layout metrics */
  --container-max-width: 1480px;
  --sidebar-width-expanded: 240px;
  --sidebar-width-collapsed: 72px;

  /* Component radii & shadows */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 8px 18px rgba(0, 0, 0, 0.32);
  --shadow-md: 0 16px 38px rgba(0, 0, 0, 0.42);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.52);

  /* Transitions & typography */
  --transition-fast: 150ms ease;
  --transition: 220ms ease;
  --transition-slow: 360ms ease;

  --font-family-base: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-base: 14px;
  --line-height-base: 1.6;

  /* Derived palette for existing styles */
  --color-bg: var(--wt-bg-main);
  --color-surface: var(--wt-bg-elevated);
  --color-surface-hover: var(--wt-bg-elevated-2);
  --color-surface-strong: var(--wt-bg-elevated-2);
  --color-border: var(--wt-border-subtle);
  --color-text: var(--wt-text-primary);
  --color-text-muted: var(--wt-text-muted);
  --color-accent: var(--wt-primary);
  --color-success: var(--wt-success);
  --color-warning: var(--wt-warning);
  --color-danger: var(--wt-danger);
  --accent-hover: var(--wt-primary-hover);
  --accent-bg: rgba(123, 97, 255, 0.16);
  --border: var(--wt-border-subtle);
  --border-strong: var(--wt-border-strong);
  color-scheme: dark;

  --login-bg-dark: radial-gradient(circle at top left, #0c0e13, #171a21 40%, #0f1116 80%);
  --login-bg-light: radial-gradient(circle at top left, #e2e8f0, #cbd5e1 40%, #94a3b8 80%);
  --login-card-bg-dark: rgba(26, 29, 36, 0.8);
  --login-card-bg-light: rgba(255,255,255,0.6);
  --login-border-glow: rgba(123, 97, 255, 0.45);
  --login-input-bg: rgba(255,255,255,0.04);
  --login-input-border: rgba(255,255,255,0.16);

  /* Legacy aliases kept for compatibility during refactor */
  --bg-0: var(--color-bg);
  --bg-1: var(--color-surface);
  --surface-0: var(--color-surface);
  --surface-1: var(--color-surface-hover);
  --text-primary: var(--color-text);
  --text-secondary: var(--wt-text-secondary);
  --text-muted: var(--color-text-muted);
  --accent: var(--color-accent);
}

:root[data-theme="light"] {
  --wt-bg-main: #F5F7FB;
  --wt-bg-elevated: #FFFFFF;
  --wt-bg-elevated-2: #EEF1F6;
  --wt-border-subtle: #d1d7e0;
  --wt-border-strong: #c4ccd8;
  --wt-text-primary: #0f172a;
  --wt-text-secondary: #1f2937;
  --wt-text-muted: #6b7280;
  --wt-text-accent: var(--color-accent);
  --wt-primary: #7B61FF;
  --wt-primary-hover: #5f45df;
  --wt-primary-active: #4b38b2;
  --wt-success: #22c55e;
  --wt-warning: #f6c945;
  --wt-danger: #ff4d4f;
  --wt-row-hover: rgba(123, 97, 255, 0.08);
  --wt-sidebar-hover: rgba(123, 97, 255, 0.1);

  --color-bg: var(--wt-bg-main);
  --color-surface: var(--wt-bg-elevated);
  --color-surface-hover: var(--wt-bg-elevated-2);
  --color-surface-strong: var(--wt-bg-elevated-2);
  --color-border: var(--wt-border-subtle);
  --color-text: var(--wt-text-primary);
  --color-text-muted: var(--wt-text-muted);
  --color-accent: var(--wt-primary);
  --color-success: var(--wt-success);
  --color-warning: var(--wt-warning);
  --color-danger: var(--wt-danger);
  --accent-hover: var(--wt-primary-hover);
  --accent-bg: rgba(123, 97, 255, 0.12);
  --border: var(--wt-border-subtle);
  --border-strong: var(--wt-border-strong);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  margin: 0;
}

h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }

p {
  margin: 0;
  color: var(--color-text);
}

small,
.text-small { font-size: 13px; }
.text-muted { color: var(--color-text-muted); }

a {
  color: inherit;
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--wt-text-accent);
}

.text-accent {
  color: var(--wt-text-accent);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

.input,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 15px;
  transition: border .15s, background .15s;
}

.input:focus,
input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface-strong);
}

.btn {
  height: 42px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  border: 1px solid transparent;
  font-weight: 600;
}

.btn-primary {
  background: var(--wt-primary);
  color: var(--wt-text-primary);
  border-color: var(--wt-primary);
  box-shadow: 0 10px 30px rgba(123, 97, 255, 0.3);
}

.btn-secondary {
  background: var(--wt-bg-elevated-2);
  color: var(--wt-text-secondary);
  border-color: var(--wt-border-strong);
}

.btn-danger {
  background: var(--wt-danger);
  color: var(--wt-text-primary);
  border-color: transparent;
}

.btn-ghost {
  background: transparent;
  border-color: var(--wt-border-subtle);
  color: var(--wt-text-secondary);
}

.btn:hover {
  background-color: var(--wt-primary-hover);
  border-color: var(--wt-primary-hover);
  color: var(--wt-text-primary);
  box-shadow: 0 12px 36px rgba(123, 97, 255, 0.34);
}

.btn-secondary:hover,
.btn-ghost:hover {
  background: var(--wt-bg-elevated);
  color: var(--wt-text-primary);
  border-color: var(--wt-border-strong);
  box-shadow: none;
}

.btn-danger:hover {
  background: var(--wt-danger);
  border-color: var(--wt-danger);
  box-shadow: 0 12px 28px rgba(255, 83, 83, 0.35);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
}

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 18px;
  background: var(--login-bg-dark);
  position: relative;
}

:root[data-theme="light"] .login-screen {
  background: var(--login-bg-light);
}

.login-screen::before,
.login-screen::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 20% 20%, rgba(59,130,246,0.16), transparent 42%),
    radial-gradient(circle at 80% 20%, rgba(96,165,250,0.14), transparent 40%);
  filter: blur(28px);
  opacity: 0.9;
}

.login-screen::after {
  background: radial-gradient(circle at 50% 80%, rgba(59,130,246,0.12), transparent 44%);
}

.login-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
}

.login-card {
  background: var(--login-card-bg-dark);
  padding: 40px 36px;
  border-radius: 24px;
  border: 1px solid color-mix(in srgb, var(--login-border-glow) 60%, transparent);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45), 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
  color: #e5edff;
}

:root[data-theme="light"] .login-card {
  background: var(--login-card-bg-light);
  color: #0f172a;
  box-shadow: 0 18px 64px rgba(15, 23, 42, 0.18);
}

.login-meta {
  color: color-mix(in srgb, currentColor 76%, transparent);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.login-title {
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.15;
  color: #fff;
  margin: 0 0 10px;
}

:root[data-theme="light"] .login-title {
  color: #0f172a;
}

.login-subtitle {
  margin: 0 0 24px;
  font-size: 16px;
  color: color-mix(in srgb, #e5edff 74%, transparent);
}

:root[data-theme="light"] .login-subtitle {
  color: #334155;
}

.login-alert {
  background: rgba(239, 68, 68, 0.12);
  color: #fecdd3;
  border: 1px solid rgba(248, 113, 113, 0.4);
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 18px;
  font-size: 14px;
  backdrop-filter: blur(8px);
}

:root[data-theme="light"] .login-alert {
  background: rgba(248, 113, 113, 0.12);
  color: #b91c1c;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.login-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.login-label {
  font-weight: 600;
  color: color-mix(in srgb, currentColor 82%, transparent);
  font-size: 14px;
}

.login-input-wrap {
  position: relative;
}

.login-input {
  width: 100%;
  height: 48px;
  padding: 0 52px 0 18px;
  border-radius: 14px;
  border: 1px solid var(--login-input-border);
  background: var(--login-input-bg);
  color: #e5edff;
  box-shadow: inset 4px 4px 12px rgba(0, 0, 0, 0.28), inset -4px -4px 12px rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(12px);
  transition: border var(--transition), box-shadow var(--transition), transform var(--transition);
}

:root[data-theme="light"] .login-input {
  background: rgba(255, 255, 255, 0.9);
  color: #0f172a;
  box-shadow: inset 3px 3px 10px rgba(148, 163, 184, 0.35), inset -3px -3px 10px rgba(255, 255, 255, 0.9);
  border-color: rgba(148, 163, 184, 0.5);
}

.login-input:focus {
  outline: none;
  border-color: var(--login-border-glow);
  box-shadow: 0 0 0 1px var(--login-border-glow), inset 4px 4px 12px rgba(0, 0, 0, 0.28), inset -4px -4px 12px rgba(255, 255, 255, 0.03);
}

.login-input-icon {
  position: absolute;
  inset: 0 14px 0 auto;
  display: inline-flex;
  align-items: center;
  color: #60a5fa;
  pointer-events: none;
}

.login-submit {
  height: 52px;
  border: none;
  border-radius: 14px;
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  box-shadow: 0 16px 32px rgba(59, 130, 246, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.login-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(59, 130, 246, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

.login-submit:active {
  transform: translateY(0);
}

.login-note {
  margin-top: 6px;
  color: color-mix(in srgb, #e5edff 70%, transparent);
  font-size: 14px;
}

:root[data-theme="light"] .login-note {
  color: #334155;
}

.login-footer {
  margin-top: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: color-mix(in srgb, currentColor 70%, transparent);
  font-size: 13px;
}

.login-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #60a5fa;
}

.login-brand__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.16);
}

@media (max-width: 640px) {
  .login-card {
    padding: 32px 24px;
  }

  .login-title {
    font-size: 24px;
  }

  .login-subtitle {
    font-size: 14px;
  }

  .login-footer {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
}

.icon {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 0 16px;
}

.hidden { display: none !important; }

[data-theme-ready="false"] body { visibility: hidden; }