:root {
    /* Primary - Blue (Doctor Theme) */
    --primary: #3B82F6;
    --primary-dark: #1E40AF;
    --primary-light: #60A5FA;
    --primary-hover: #2563EB;
    --primary-bg: #DBEAFE;
    --primary-bg-light: #EFF6FF;
    
    /* Accent - Medical Green (Trust & Health) */
    --accent: #10B981;
    --accent-dark: #059669;
    --accent-light: #34D399;
    --accent-bg: #D1FAE5;
    --accent-bg-light: #ECFDF5;
    
    /* Status Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #3B82F6;
    
    /* Neutrals */
    --dark: #0F172A;
    --dark-soft: #1E293B;
    --gray-700: #334155;
    --gray-600: #475569;
    --gray-500: #64748B;
    --gray-400: #94A3B8;
    --gray-300: #CBD5E1;
    --gray-200: #E2E8F0;
    --gray-100: #F1F5F9;
    --gray-50: #F8FAFC;
    --white: #FFFFFF;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3B82F6 0%, #2563EB 50%, #1E40AF 100%);
    --gradient-accent: linear-gradient(135deg, #10B981 0%, #059669 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.3);
    --shadow-accent: 0 10px 25px -5px rgba(16, 185, 129, 0.4);
    
    /* Layout */
    --sidebar-width: 280px;
    --header-height: 72px;
    
    /* Typography */
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { 
    font-family: var(--font-family); 
    background: var(--white); 
    color: var(--dark); 
    line-height: 1.6;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }

/* ============================================
   BUTTONS
============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover { 
    transform: translateY(-2px); 
    box-shadow: var(--shadow-lg); 
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-accent:hover { 
    transform: translateY(-2px); 
    box-shadow: var(--shadow-accent); 
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
    border: 2px solid var(--gray-200);
}

.btn-ghost:hover { 
    background: var(--gray-100); 
    border-color: var(--gray-300); 
}

.btn-lg { 
    padding: 1rem 2rem; 
    font-size: 1.05rem; 
    border-radius: 12px;
}

.btn-sm { 
    padding: 0.5rem 1rem; 
    font-size: 0.875rem; 
}

/* ============================================
   UTILITIES
============================================ */
.container { 
    max-width: 1280px; 
    margin: 0 auto; 
    padding: 0 1.5rem; 
}

/* ============================================
   RESPONSIVE
============================================ */
@media (max-width: 768px) {
    :root { 
        --sidebar-width: 100%; 
    }
}