:root {
  --color-bg: #f9fafb;
  --color-bg-elevated: #ffffff;
  --color-bg-dark: #111827;
  --color-bg-panel: #1f2937;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-text-inverted: #f9fafb;
  --color-border: #e5e7eb;
  --color-primary: #10b981;
  --color-primary-dark: #059669;
  --color-gold: #f59e0b;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  --color-info: #3b82f6;
  --max-width: 1240px;
  --radius: 8px;
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

[dir='rtl'] body {
  font-family: 'Inter', 'Tajawal', -apple-system, sans-serif;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4, h5 {
  margin: 0 0 0.5em;
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

button {
  font-family: inherit;
  font-size: 0.9375rem;
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: 0.625rem 1.25rem;
  font-weight: 600;
  transition: background 0.15s, transform 0.05s;
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg);
}

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

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

input, textarea, select {
  font-family: inherit;
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.625rem 0.875rem;
  background: var(--color-bg-elevated);
  color: var(--color-text);
  width: 100%;
  box-sizing: border-box;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
  color: var(--color-text);
}