/* Importa la fuente 'Inter' desde Google Fonts para una tipografía moderna */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');

/* --- Paleta de Colores por Defecto (Tema 1) --- */
:root {
    --bg-color: #f8f9fa;
    --canvas-bg-color: #ffffff;
    --text-color: #212529;
    --text-muted-color: #495057;
    --border-color: #dee2e6;
    --controls-bg-color: rgba(255, 255, 255, 0.9);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --focus-ring-color: rgba(13, 110, 253, 0.25);
    --primary-accent: #0d6efd;

    /* Colores de Nivel para los Nodos */
    --level-0-color: #0d6efd;
    --level-1-color: #198754;
    --level-2-color: #ffc107;
    --level-3-color: #fd7e14;
    --level-4-color: #dc3545;
    --level-5-color: #6f42c1;
    --level-6-color: #6c757d;
    --level-7-color: #343a40;
}

/* Estilos base */
html, body {
    margin: 0; padding: 0; width: 100%; height: 100%;
    overflow: hidden;
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.canvas-container { width: 100%; height: 100vh; position: relative; }
canvas { display: block; width: 100%; height: 100%; background-color: var(--canvas-bg-color); cursor: grab; }
canvas:active { cursor: grabbing; }

/* --- Barras de Controles (Superior e Inferior) --- */
.top-controls, .controls {
    position: absolute;
    background-color: var(--controls-bg-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 0.75rem;
    padding: 0.5rem;
    box-shadow: 0 8px 24px var(--shadow-color);
    border: 1px solid rgba(0, 0, 0, 0.08);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease-in-out;
}
.top-controls { top: 1rem; left: 1rem; }
.controls { bottom: 1rem; right: 1rem; }

/* Contenedores Colapsables */
.collapsible-controls, .collapsible-controls-bottom {
    display: flex; align-items: center; gap: 0.5rem;
    overflow: hidden;
    transition: max-width 0.35s ease-in-out, opacity 0.2s ease-in-out, padding 0.35s, margin 0.35s;
    max-width: 1000px; opacity: 1; white-space: nowrap;
}
.top-controls.collapsed .collapsible-controls,
.controls.collapsed .collapsible-controls-bottom {
    max-width: 0; opacity: 0; padding: 0; margin: 0;
}

/* Elementos de Formularios */
.top-controls label { font-size: 0.875rem; font-weight: 500; color: var(--text-muted-color); margin-left: 0.5rem; }
#map-selector, #theme-selector, #search-input {
    font-family: inherit; font-size: 0.875rem;
    padding: 0.4rem 0.6rem; border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--canvas-bg-color);
    transition: border-color 0.2s, box-shadow 0.2s;
}
#map-selector:focus, #theme-selector:focus, #search-input:focus {
    outline: none; border-color: var(--primary-accent);
    box-shadow: 0 0 0 0.25rem var(--focus-ring-color);
}
#search-input { width: 16rem; }

/* Botones */
.export-group { display: inline-flex; gap: 0.4rem; margin-left: 0.5rem; }
.btn.small {
    height: 2.25rem; min-width: 3rem; padding: 0 0.75rem;
    border-radius: 0.5rem; border: 1px solid var(--border-color);
    background: var(--canvas-bg-color); color: var(--text-muted-color);
    font-size: 0.875rem; font-weight: 500; cursor: pointer; transition: all 0.2s;
}
.btn.small:hover { background: #f1f3f5; border-color: #adb5bd; color: #000; }

.control-btn {
    width: 3rem; height: 3rem; border-radius: 0.5rem;
    border: none; background: transparent; color: var(--text-muted-color);
    font-size: 1.75rem; font-weight: 300; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: background-color 0.2s, color 0.2s;
}
.control-btn:hover { background: #e9ecef; color: #000; }
.control-btn svg { width: 1.5rem; height: 1.5rem; }
.icon-btn { width: 2.5rem; height: 2.5rem; font-size: 1.25rem; }

/* Modal del Glosario */
.modal-overlay {
    position: fixed; inset: 0; background-color: rgba(33, 37, 41, 0.5);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000; opacity: 0; visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-overlay.visible { opacity: 1; visibility: visible; }
.modal-content {
    background: var(--canvas-bg-color); padding: 2rem; border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    width: 90%; max-width: 640px; max-height: 80vh; overflow-y: auto;
    transform: scale(0.95); transition: transform 0.3s ease;
}
.modal-overlay.visible .modal-content { transform: scale(1); }
.modal-header {
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem; margin-bottom: 1rem;
}
.modal-title { font-size: 1.5rem; font-weight: 700; color: var(--text-color); margin: 0; }
.modal-close-btn {
    background: none; border: none; font-size: 2rem;
    font-weight: 300; line-height: 1; cursor: pointer;
    color: var(--text-muted-color); padding: 0;
}
.glossary-item { margin-bottom: 1.25rem; }
.glossary-term { font-weight: 700; color: var(--primary-accent); font-size: 1.1rem; }
.glossary-definition { color: var(--text-muted-color); font-size: 1rem; margin-top: 0.25rem; line-height: 1.6; }