:root {
  --primary-color: #1e40af;
  --primary-dark: #1e3a8a;
  --primary-light: #dbeafe;

  --text-primary: #e5e7eb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --text-light: #6b7280;

  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;

  --border-color: #475569;
  --border-light: #334155;
  --border-dark: #64748b;

  --success-color: #10b981;
  --success-light: #064e3b;
  --success-dark: #059669;

  --error-color: #ef4444;
  --error-light: #7f1d1d;
  --error-dark: #dc2626;

  --warning-color: #f59e0b;
  --warning-light: #78350f;
  --warning-dark: #d97706;

  --info-color: #3b82f6;
  --info-light: #1e3a8a;
  --info-dark: #2563eb;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
    "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
    sans-serif;
  --font-mono: "Courier New", Courier, monospace;

  --transition-fast: 0.15s ease-in-out;
  --transition-base: 0.2s ease-in-out;
  --transition-slow: 0.3s ease-in-out;

  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 900;
  --z-modal: 1000;
  --z-popover: 1100;
  --z-tooltip: 1200;
}

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

html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
ul,
ol,
dl,
figure,
fieldset {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
}

button:focus {
  outline: none;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
  margin: 0;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.875rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: 1rem;
}

small {
  font-size: 0.875rem;
}

strong,
b {
  font-weight: 600;
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

.invisible {
  visibility: hidden !important;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.text-left {
  text-align: left;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

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

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

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

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

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

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

.bg-primary {
  background-color: var(--bg-primary);
}

.bg-secondary {
  background-color: var(--bg-secondary);
}

.mt-1 {
  margin-top: var(--spacing-sm);
}
.mt-2 {
  margin-top: var(--spacing-md);
}
.mt-3 {
  margin-top: var(--spacing-lg);
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}
.mb-2 {
  margin-bottom: var(--spacing-md);
}
.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.p-1 {
  padding: var(--spacing-sm);
}
.p-2 {
  padding: var(--spacing-md);
}
.p-3 {
  padding: var(--spacing-lg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary {
  background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #1e3a8a 0%, #172554 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-secondary);
  border-color: var(--border-dark);
}

.btn-danger {
  background-color: var(--error-color);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--error-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background-color: var(--success-color);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background-color: var(--success-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}