/**
 * Hoja de Estilos para la Calculadora de Números Cuánticos
 * Versión profesional y optimizada, coherente con el tema del laboratorio.
 */

/* --- 1. VARIABLES GLOBALES Y RESET --- */
:root {
    /* Tema coherente con Geometría Molecular (verde corporativo) */
    --color-bg-start: #000000;
    --color-bg-end: #0f1113;
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a0a0a5;
    --color-border: #303033;
    --color-surface: #1c1c1e;
    --color-surface-2: #0f1113;
    --color-surface-interactive: #0f1113;
    --color-accent: #28a745; /* verde */
    --color-highlight: #e53636; /* rojo para resalte */
    --color-shadow: rgba(0, 0, 0, 0.35);

    /* Tipografía y espaciado */
    --font-family: "Georgia", serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --shadow-md: 0 8px 30px var(--color-shadow);
    --transition-speed: 0.25s;
    color-scheme: dark;
    /* Altura mínima unificada para ambos paneles (cajas y árbol) */
    --viz-panel-min-h: clamp(240px, 34vh, 420px);
}

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

body {font-family: var(--font-family);background-color: var(--color-bg-start);color: var(--color-text-primary);min-height: 100vh;padding: 1.25rem 1rem;font-size: 16px;}

/* --- 2. LAYOUT Y COMPONENTES PRINCIPALES --- */
.container {
    max-width: 1200px;
    margin-inline: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

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

.main-header h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    letter-spacing: 1px;
    text-shadow: 0 2px 4px var(--color-shadow);
    margin-bottom: 0.5rem;
}

.main-header .subtitle {
    font-size: clamp(1rem, 2.5vw, 1.1rem);
    color: var(--color-text-secondary);
    max-width: 65ch;
    margin-inline: auto;
}

section {background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-2) 100%);border:1px solid var(--color-border);border-radius: var(--radius-md);padding:1.5rem;box-shadow: var(--shadow-md)}

section h2, section h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
}

/* --- 3. SECCIÓN DE CONTROLES --- */
.controls-form {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-end;
    gap: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 120px;
}

.control-group label {
    font-weight: 600;
    color: var(--color-text-secondary);
}

.select-field {
    font-family: inherit;
    font-size: 1rem;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface-interactive);
    color: var(--color-text-primary);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    cursor: pointer;
}

.select-field:focus-visible {outline: none;border-color: var(--color-accent);box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 25%, transparent)}

/* --- 4. VISUALIZACIONES (ORBITALES Y ÁRBOL) --- */
.visualization-grid {display:grid;grid-template-columns:1fr !important;gap:2rem}

/* Mantener el árbol debajo del diagrama también en pantallas grandes */
@media (min-width: 992px) {
    .visualization-grid {grid-template-columns: 1fr;}
}

.orbital-display, .tree-display {background-color: var(--color-surface);border-radius: var(--radius-md);padding: 0.75rem 1rem;display:flex;flex-direction:column;content-visibility:auto;border:1px solid var(--color-border);min-height: var(--viz-panel-min-h);} 
/* Orbitales: ajustar altura al contenido, sin espacio adicional */
.orbital-display{min-height: unset; content-visibility: visible; contain-intrinsic-size:auto}
.tree-display{min-height: unset; content-visibility: visible; contain-intrinsic-size:auto}

#orbital-container {display:flex;flex-direction:column;gap:0.75rem;align-items:center;margin:0 auto}

/* Reducir separación debajo del título para acercar el contenido */
.orbital-display h3{margin-bottom:0.6rem}

.orbital-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.orbital-label {
    font-weight: bold;
    font-size: 1.2rem;
    min-width: 40px;
    text-align: right;
}

.orbital-boxes {
    display: flex;
    gap: 0.25rem;
}

.orbital-box {width:44px;height:44px;border:1px solid var(--color-border);border-radius:12px;display:flex;flex-direction:column;justify-content:center;align-items:center;font-size:1.1rem;font-weight:700;color:var(--color-accent);background-color:var(--color-surface-2)}

.orbital-box.highlight {border-color: var(--color-accent);box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 20%, transparent)}

.ml-label {
    font-size: 0.7rem;
    color: var(--color-text-secondary);
}

/* Estilos para el árbol D3 */
#tree-container {display:flex;justify-content:center;align-items:center;margin:auto}

#tree-container svg {
    max-width: 100%;
    height: auto;
}

#tree-container .link {fill:none;stroke: var(--color-text-secondary);stroke-opacity:.6;stroke-width:1.5px}

#tree-container .node circle {stroke: var(--color-accent);stroke-width:1.5px}

/* --- 5. SECCIÓN DE CONFIGURACIÓN ELECTRÓNICA --- */
.config-controls {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

#show-reduced {
    width: 1.25em;
    height: 1.25em;
    accent-color: var(--color-accent);
}

.result-wrapper {background-color: var(--color-surface);border:1px solid var(--color-border);border-radius: var(--radius-md);padding:2rem;text-align:center;box-shadow: var(--shadow-md)}

.element-symbol-display {font-size: clamp(3rem,10vw,5rem);font-weight:700;line-height:1;color: var(--color-accent);margin-bottom:1rem}

.configuration-output {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    font-weight: 500;
    word-break: break-all;
    margin-bottom: 2rem;
}

.info-cards {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.card {
    background-color: var(--color-surface-interactive);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1.25rem;
    font-weight: 600;
    flex: 1 1 150px;
    min-width: 150px;
}

/* --- 6. UTILIDADES (LOADER, ERRORES) --- */
.loader, .error-message {text-align:center;padding:1rem 1.25rem;font-weight:600;border-radius:12px}

.error-message {color:#fff;background-color:color-mix(in srgb, var(--color-highlight) 15%, transparent);border:1px solid var(--color-highlight)}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

[hidden] {
    display: none !important;
}