:root {
    /* Color Palette - Premium Medical Theme */
    --primary: #0ea5e9;
    --primary-hover: #0284c7;
    --secondary: #6366f1;
    --accent: #f43f5e;
    
    --bg-main: #f1f5f9;
    --bg-sidebar: #f1f5f9;
    --bg-card: #f1f5f9;
    
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-white: #ffffff;
    
    --border-color: transparent; /* Borders are replaced by shadows in claymorphism */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Claymorphism Variables - Light Mode */
    --clay-box-shadow: 8px 8px 16px rgba(0, 0, 0, 0.06), inset -6px -6px 12px rgba(0, 0, 0, 0.08), inset 6px 6px 12px rgba(255, 255, 255, 0.9);
    --clay-box-shadow-hover: 12px 12px 20px rgba(0, 0, 0, 0.08), inset -8px -8px 16px rgba(0, 0, 0, 0.1), inset 8px 8px 16px rgba(255, 255, 255, 0.9);
    --clay-box-shadow-active: 4px 4px 8px rgba(0, 0, 0, 0.04), inset -4px -4px 8px rgba(0, 0, 0, 0.05), inset 4px 4px 8px rgba(255, 255, 255, 0.7);
    --clay-inset-shadow: inset 6px 6px 12px rgba(0, 0, 0, 0.06), inset -6px -6px 12px rgba(255, 255, 255, 0.9);
    --clay-inset-shadow-focus: inset 8px 8px 16px rgba(0, 0, 0, 0.08), inset -8px -8px 16px rgba(255, 255, 255, 1);
    
    --radius-sm: 0.75rem;
    --radius-md: 1.25rem;
    --radius-lg: 1.75rem;
    --radius-xl: 2.25rem;

    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

body.dark-theme {
    --bg-main: #111827;
    --bg-sidebar: #111827;
    --bg-card: #111827;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --border-color: transparent;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    
    /* Claymorphism Variables - Dark Mode */
    --clay-box-shadow: 8px 8px 16px rgba(0, 0, 0, 0.4), inset -6px -6px 12px rgba(0, 0, 0, 0.5), inset 6px 6px 12px rgba(255, 255, 255, 0.05);
    --clay-box-shadow-hover: 12px 12px 20px rgba(0, 0, 0, 0.5), inset -8px -8px 16px rgba(0, 0, 0, 0.6), inset 8px 8px 16px rgba(255, 255, 255, 0.07);
    --clay-box-shadow-active: 4px 4px 8px rgba(0, 0, 0, 0.3), inset -4px -4px 8px rgba(0, 0, 0, 0.4), inset 4px 4px 8px rgba(255, 255, 255, 0.03);
    --clay-inset-shadow: inset 6px 6px 12px rgba(0, 0, 0, 0.5), inset -6px -6px 12px rgba(255, 255, 255, 0.03);
    --clay-inset-shadow-focus: inset 8px 8px 16px rgba(0, 0, 0, 0.6), inset -8px -8px 16px rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-weight: 700;
    color: var(--text-main);
}

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
}

input, select, textarea {
    font-family: inherit;
    outline: none;
}

/* Scrollbar Style */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
    transition: background 0.15s ease;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Optimización: tablas y contenedores grandes */
.table-container {
    /* Permite que el browser optimice el scroll sin repaint del contenido estático */
    -webkit-overflow-scrolling: touch;
}

/* Optimización: las filas de tabla fuera de pantalla no se renderizan */
tbody tr {
    contain: layout; /* Cada fila es un contexto independiente de layout */
}

/* Optimización: main content usa GPU layer propia */
.main-content {
    isolation: isolate; /* Crea stacking context propio, evita composición con body::before/after */
}