/* ======== VARIABLES Y ESTILOS GLOBALES (Tu Base) ======== */
:root {
    --header-height: 70px;
    --sidebar-width: 260px;
    --color-purple-dark: #41227D;
    --color-purple-light: #7E57C2;
    --color-accent: #A881E9; 
    --color-white: #FFFFFF;
    --color-light-gray: #F7F5FA;
    --color-dark-gray: #333333;
    --color-text-light: #6D6D6D;
    --color-success: #28a745;
    --color-info: #17a2b8;
    --color-danger: #dc3545;
    
    --font-primary: 'Poppins', sans-serif;
    --font-display: 'Montserrat', sans-serif;
    --gradient-primary: linear-gradient(45deg, var(--color-purple-light), var(--color-accent));
    --transition-smooth: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-soft: 0 4px 15px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 8px 30px rgba(126, 87, 194, 0.15);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-primary);
    color: var(--color-dark-gray);
    background-color: var(--color-light-gray);
    line-height: 1.6;
}
body.sidebar-open {
    overflow: hidden;
}

/* ======== NUEVA ESTRUCTURA DE LAYOUT ======== */
.app-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--header-height) 1fr;
    grid-template-areas:
        "sidebar header"
        "sidebar main";
    height: 100vh;
}
.app-header {
    grid-area: header;
    background-color: var(--color-white);
    border-bottom: 1px solid #EAEAEA;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.app-sidebar {
    grid-area: sidebar;
    background-color: var(--color-white);
    border-right: 1px solid #EAEAEA;
    padding: 30px;
    display: flex;
    flex-direction: column;
    transition: transform 0.4s ease;
}
.app-main {
    grid-area: main;
    overflow-y: auto;
    padding: 40px;
}

/* --- Componentes del Layout --- */
.sidebar-header { margin-bottom: 40px; text-align: center; }
.sidebar-header .logo {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    text-decoration: none;
    background-image: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    padding: 10px 0;
    transition: transform 0.3s ease;
}
.sidebar-header .logo:hover {
    transform: scale(1.05);
}

.sidebar-nav .nav-list { list-style: none; display: flex; flex-direction: column; gap: 15px; }
.sidebar-nav .nav-link { display: flex; align-items: center; gap: 15px; padding: 12px 15px; border-radius: 8px; text-decoration: none; color: var(--color-text-light); font-weight: 600; transition: var(--transition-smooth); }
.sidebar-nav .nav-link:hover { background-color: var(--color-light-gray); color: var(--color-purple-dark); }
.sidebar-nav .nav-link.active { background-image: var(--gradient-primary); color: var(--color-white); box-shadow: var(--shadow-medium); }
.sidebar-nav .nav-link i { font-size: 1.2rem; min-width: 20px; text-align: center; }

.header-user { display: flex; align-items: center; gap: 15px; }
.header-user .user-name { font-weight: 600; }
.header-user .user-role { font-size: 0.8rem; color: var(--color-text-light); }

.header-toggle { 
    display: none; 
    font-size: 1.8rem; 
    color: var(--color-purple-dark); 
    cursor: pointer; 
    background: none; 
    border: none;
    position: relative;
    z-index: 1001;
}
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}
.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ======== COMPONENTES DE LA APLICACIÓN ======== */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; flex-wrap: wrap; gap: 20px; }
.page-title { font-family: var(--font-display); font-size: 2.2rem; font-weight: 800; color: var(--color-purple-dark); }
.card { background-color: var(--color-white); padding: 30px; border-radius: 12px; box-shadow: var(--shadow-soft); border: 1px solid #EAEAEA; }
.card-header h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; color: var(--color-purple-dark); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 25px; border-radius: 8px; text-decoration: none; font-weight: 600; transition: var(--transition-smooth); border: none; cursor: pointer; }
.button--primary { background: var(--gradient-primary); color: var(--color-white); box-shadow: var(--shadow-medium); }
.button--primary:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(126, 87, 194, 0.3); }
.button--secondary { background-color: var(--color-light-gray); color: var(--color-purple-dark); }
.button--secondary:hover { background-color: #e9e4f1; }
.button--small { padding: 6px 15px; font-size: 0.85rem; }

/* ======== ESTILOS GLOBALES PARA FORMULARIOS (INTEGRADOS) ======== */
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text-light);
    font-size: 0.9rem;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-primary);
    background-color: var(--color-white);
    transition: var(--transition-smooth);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-purple-light);
    box-shadow: 0 0 0 3px rgba(126, 87, 194, 0.15);
}
.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23333' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
    padding-right: 2.5rem;
}


/* --- Tablas --- */
.table-wrapper { display: block; width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid #EAEAEA; border-radius: 8px; }
.app-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; min-width: 600px; }
.app-table th, .app-table td { padding: 15px; text-align: left; border-bottom: 1px solid #EAEAEA; vertical-align: middle; white-space: nowrap; }
.app-table tbody tr:last-child td { border-bottom: none; }
.app-table th { font-weight: 700; color: var(--color-text-light); font-size: 0.8rem; text-transform: uppercase; background-color: #fcfaff; }
.app-table tbody tr:hover { background-color: #FBF9FF; }

/* --- Modales --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    padding: 20px;
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}
.modal-content {
    background: var(--color-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 550px;
    transform: scale(0.95);
    transition: transform 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}
.modal-overlay.active .modal-content {
    transform: scale(1);
}
.modal-close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: 2rem;
    color: #aaa;
    cursor: pointer;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-purple-dark);
    margin-bottom: 20px;
    padding-right: 30px;
}
.modal-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    overflow-y: auto;
    flex-grow: 1;
    padding-right: 15px;
    margin-right: -15px;
}
.modal-form label {
    font-weight: 600;
    color: var(--color-text-light);
    font-size: 0.9rem;
}
.modal-form input, 
.modal-form select, 
.modal-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-primary);
}
.modal-form input:focus, 
.modal-form select:focus, 
.modal-form textarea:focus {
    outline: none;
    border-color: var(--color-purple-light);
    box-shadow: 0 0 0 3px rgba(126, 87, 194, 0.15);
}
.modal-footer {
    margin-top: 25px;
    text-align: right;
    flex-shrink: 0;
}

/* --- Estilos para la página de Búsqueda --- */
.busqueda-form-container { display: flex; gap: 15px; align-items: stretch; }
.busqueda-form-container input { flex-grow: 1; padding: 15px; font-size: 1.1rem; border: 1px solid #ddd; border-radius: 8px; }
.busqueda-form-container .button { padding: 15px 30px; }
#resultados-busqueda-container { margin-top: 40px; }

/* --- Estilos para la página de Métricas --- */
.grafico-container {
    position: relative;
    height: 400px;
    width: 100%;
}
.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}
.input-filtro {
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 1rem;
    background-color: var(--color-white);
    min-width: 200px;
}
.metricas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}
.metrica-card {
    background-color: var(--color-white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    border: 1px solid #EAEAEA;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    transition: var(--transition-smooth);
}
.metrica-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}
.metrica-card h3 {
    color: var(--color-text-light);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    text-transform: uppercase;
    white-space: nowrap;
}
.metrica-card .valor {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--color-purple-dark);
    line-height: 1.2;
    word-wrap: break-word;
    hyphens: auto;
    min-height: 54px;
}
.metrica-card .comparativo { display: inline-block; margin-top: 10px; font-weight: 600; font-size: 0.85rem; padding: 4px 10px; border-radius: 20px; }
.metrica-card .comparativo.positivo { background-color: #e9f7ef; color: var(--color-success); }
.metrica-card .comparativo.negativo { background-color: #fceeee; color: var(--color-danger); }
.metrica-card.beneficio-card { border-left: 5px solid; }
.metrica-card.beneficio-card.positivo { border-color: var(--color-success); }
.metrica-card.beneficio-card.negativo { border-color: var(--color-danger); }
.metrica-card.beneficio-card.positivo .valor { color: var(--color-success); }
.metrica-card.beneficio-card.negativo .valor { color: var(--color-danger); }
.card-analisis { grid-column: 1 / -1; }
.card-analisis h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-purple-dark);
    margin: -10px 0 20px 0;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}
.card-analisis .table-wrapper { border: none; border-radius: 0; margin: 0 -15px -15px -15px; }
.card-analisis .app-table th, .card-analisis .app-table td { padding-left: 15px; padding-right: 15px; }
.lista-gastos { list-style: none; padding: 0; margin: 0; }
.lista-gastos li { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid #f0f0f0; font-size: 0.95rem; }
.lista-gastos li:last-child { border-bottom: none; }
.lista-gastos li span { color: var(--color-text-light); }
.lista-gastos li strong { font-family: var(--font-display); font-weight: 700; font-size: 1rem; color: var(--color-dark-gray); }

/* --- Estilos para Agenda (Acordeón) --- */
.dia-agenda { display: none; }
.dia-agenda-lista { display: block; margin-bottom: 20px; }
.dia-toggle {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-purple-dark);
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 2px solid #EAEAEA;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.dia-toggle:hover { color: var(--color-purple-light); }
.dia-toggle::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 1rem;
    transition: transform 0.3s ease;
}
.clases-container { max-height: 0; overflow: hidden; transition: max-height 0.4s ease-out; }
.dia-agenda-lista.active .dia-toggle::after { transform: rotate(180deg); }
.dia-agenda-lista.active .clases-container { max-height: 3000px; }

/* --- Tarjeta de Clase --- */
.clase-card { background-color: var(--color-white); border-radius: 10px; margin-bottom: 15px; box-shadow: var(--shadow-soft); display: flex; transition: var(--transition-smooth); position: relative; overflow: hidden; }
.clase-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-medium); }
.clase-card::before { content: ''; position: absolute; left: 0; top: 0; width: 6px; height: 100%; }
.clase-card--programada::before { background-image: var(--gradient-primary); }
.clase-card--completada::before { background-color: var(--color-success); }
.clase-card__main { padding: 20px; flex-grow: 1; display: flex; justify-content: space-between; align-items: center; gap: 15px; flex-wrap: wrap; }
.clase-card__info-horario { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--color-dark-gray); margin-bottom: 10px; }
.clase-card__info-detalles { display: grid; gap: 8px; }
.clase-card__info-detalle { font-size: 0.95rem; color: var(--color-text-light); display: flex; align-items: center; gap: 10px; }
.clase-card__info-detalle i { color: var(--color-accent); min-width: 16px; text-align: center; }
.clase-card__actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; flex-shrink: 0; }
.clase-card__actions .button { padding: 8px 12px; font-size: 0.85rem; }
.clase-card--completada .clase-card__main { opacity: 0.7; }
.clase-card--completada:hover .clase-card__main { opacity: 1; }

/* --- Calendario de Disponibilidad --- */
.fc { font-size: 0.9em; }
.fc .fc-button-primary { background-color: var(--color-purple-light) !important; border-color: var(--color-purple-light) !important; text-transform: capitalize; }
.fc .fc-button-primary:hover { background-color: var(--color-purple-dark) !important; border-color: var(--color-purple-dark) !important; }
.fc .fc-daygrid-day.fc-day-today { background-color: rgba(168, 129, 233, 0.1); }
.fc .fc-timegrid-slot-label { vertical-align: middle; }

/* --- ESTILOS ESPECÍFICOS PARA GESTIÓN DE COBRANZAS (INTEGRADOS) --- */
.cobranzas-form .form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px 30px;
}
.cobranzas-form .form-footer {
    text-align: right;
    margin-top: 10px;
}
.app-table .cuota-vencida {
    background-color: #fff2f2 !important;
}
.app-table .cuota-vencida td {
    color: var(--color-danger);
}
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.status-badge.status-pendiente {
    background-color: #eef0f2;
    color: #5a6a79;
}
.status-badge.status-vencida {
    background-color: #fceeee;
    color: var(--color-danger);
}

/* ======== ESTILOS RESPONSIVE (VERSIÓN FINAL Y UNIFICADA) ======== */
@media (max-width: 992px) {
    .app-layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "header"
            "main";
    }
    .app-sidebar {
        position: fixed;
        left: 0;
        transform: translateX(-100%);
        top: 0;
        height: 100vh;
        width: var(--sidebar-width);
        max-width: 80%;
        z-index: 200;
        box-shadow: 5px 0 20px rgba(0,0,0,0.1);
        transition: transform 0.4s ease;
    }
    .app-sidebar.show-sidebar { transform: translateX(0); }
    .header-toggle { display: block; }
}

@media (max-width: 768px) {
    .app-main { padding: 20px; }
    .page-header { flex-direction: column; align-items: flex-start; gap: 15px; }
    .page-title { font-size: 1.8rem; }
    .modal-content { width: 95%; padding: 20px; }
    .modal-header h2 { font-size: 1.3rem; }
    .modal-form { gap: 15px; }
    .busqueda-form-container { flex-direction: column; }
    .busqueda-form-container .button { width: 100%; }
    .header-actions { flex-direction: column; width: 100%; }
    .header-actions .input-filtro,
    .header-actions .button { width: 100%; justify-content: center; }
    .metricas-grid { grid-template-columns: 1fr; gap: 20px; }
    .metrica-card .valor { font-size: 2.2rem; min-height: 42px; }
    .metricas-grid .card { padding: 20px; }
    .fc .fc-toolbar.fc-header-toolbar { flex-direction: column; gap: 15px; margin-bottom: 20px !important; }
    .fc .fc-toolbar-title { font-size: 1.2rem; }
    .fc-header-toolbar .fc-toolbar-chunk:last-child .fc-button-group { display: flex; width: 100%; }
    .fc-header-toolbar .fc-toolbar-chunk:last-child .fc-button-group .fc-button { flex-grow: 1; }
}

@media (max-width: 480px) {
    .clase-card__main { flex-direction: column; align-items: flex-start; }
    .clase-card__actions { width: 100%; padding-top: 15px; margin-top: 15px; border-top: 1px solid #f0f0f0; justify-content: flex-start; }
    .clase-card__info-horario { font-size: 1.3rem; }
}

/* ======================================================= */
/* ====== ESTILOS FINALES PARA GESTIÓN DE COBRANZAS ====== */
/* ======================================================= */

.accordion-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: 15px; /* Añadimos padding para que sea más fácil hacer clic */
    margin: -15px; /* Negativo para alinear con el borde del card */
}

.cobranza-header-info .progreso-clases {
    color: var(--color-text-light);
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 5px;
    display: block;
}

.cobranza-header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.accordion-icon {
    font-size: 1.2rem;
    color: var(--color-accent);
    transition: transform 0.4s ease;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
    padding-top: 0; /* Para que no haya un salto brusco */
}

.alumno-cobranza-card.active .accordion-content {
    padding-top: 20px; /* Añade espacio cuando se abre */
}
/* ======================================================= */
/* ====== ESTILOS PARA LA NUEVA AGENDA DE LÍNEA DE TIEMPO ====== */
/* ======================================================= */

.agenda-container {
    margin-top: 30px;
}

.week-navigator {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.week-display-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-purple-dark);
    text-align: center;
}

.day-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid #EAEAEA;
}

.day-tab {
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 10px 20px;
    border: none;
    background-color: transparent;
    cursor: pointer;
    color: var(--color-text-light);
    border-bottom: 3px solid transparent;
    transition: var(--transition-smooth);
    transform: translateY(1px);
}

.day-tab:hover {
    color: var(--color-purple-dark);
}

.day-tab.active {
    color: var(--color-purple-light);
    border-bottom-color: var(--color-purple-light);
}

.timeline {
    position: relative;
    padding-left: 70px; /* Espacio para las etiquetas de hora */
    height: 1000px; /* Altura fija para un día de 8am a 9pm aprox. */
}

.timeline-hour {
    position: relative;
    height: 80px; /* Altura para una hora */
    border-top: 1px solid #f0f0f0;
}
.timeline-hour:first-child {
    border-top: none;
}

.timeline-hour-label {
    position: absolute;
    left: -70px;
    top: -10px;
    width: 60px;
    text-align: right;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-light);
}

.timeline-event {
    position: absolute;
    left: 70px;
    right: 0;
    background-color: var(--color-white);
    border-radius: 8px;
    padding: 10px 15px;
    box-shadow: var(--shadow-soft);
    border-left: 5px solid;
    z-index: 10;
    transition: var(--transition-smooth);
    overflow: hidden;
}

.timeline-event:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-medium);
    z-index: 11;
}

.timeline-event strong {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 4px;
}

.timeline-event p {
    font-size: 0.85rem;
    margin: 0;
}

/* Variante para Bloqueos de Disponibilidad */
.timeline-event.unavailable {
    background-color: #fff5f5;
    border-color: var(--color-danger);
    color: var(--color-danger);
    cursor: pointer; /* Para indicar que se puede hacer clic para eliminar */
}
.timeline-event.unavailable strong {
    color: var(--color-danger);
}

/* Variante para Clases ya Agendadas */
.timeline-event.scheduled {
    background-color: #f7f5fa;
    border-color: var(--color-accent);
    color: var(--color-dark-gray);
}
.timeline-event.scheduled strong {
    color: var(--color-purple-dark);
}
/* --- ESTILOS PARA GESTIÓN DE COBRANZAS Y CALCULADORA --- */

/* Controles de Búsqueda y Calculadora */
.cobranzas-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}
.busqueda-form-container {
    display: flex;
    min-width: 300px;
}
.busqueda-form-container input {
    border-radius: 8px 0 0 8px;
}
.busqueda-form-container button {
    border-radius: 0 8px 8px 0;
}

/* Fila de cuota marcada como pagada */
tr.cuota-pagada-exito {
    background-color: #e6ffed !important;
    transition: background-color 0.5s ease;
}
tr.cuota-pagada-exito td {
    text-decoration: line-through;
    color: #999;
}
.status-badge.status-pagada {
    background-color: #28a745;
    color: white;
}

/* Transición para eliminar la tarjeta del alumno */
.alumno-cobranza-card {
    transition: opacity 0.5s ease;
}

/* --- ESTILOS PARA GESTIÓN DE COBRANZAS Y CALCULADORA --- */

/* Controles de Búsqueda y Calculadora */
.cobranzas-controls { display: flex; justify-content: space-between; align-items: center; gap: 15px; flex-wrap: wrap; }
.busqueda-form-container { display: flex; min-width: 300px; }
.busqueda-form-container input { border-radius: 8px 0 0 8px; }
.busqueda-form-container button { border-radius: 0 8px 8px 0; }

/* Fila de cuota marcada como pagada */
tr.cuota-pagada-exito { background-color: #e6ffed !important; transition: background-color 0.5s ease; }
tr.cuota-pagada-exito td { text-decoration: line-through; color: #999; }
.status-badge.status-pagada { background-color: #28a745; color: white; }

/* Transición para eliminar la tarjeta del alumno */
.alumno-cobranza-card { transition: opacity 0.5s ease; }

/* --- ESTILOS PARA LA CALCULADORA (MODAL) --- */
.modal { position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); display: none; align-items: center; justify-content: center; }
.modal.active { display: flex; }
.modal-content { background: white; width: 90%; max-width: 500px; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.3); animation: slide-down 0.3s ease-out; }
@keyframes slide-down { from { transform: translateY(-30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-header, .modal-body, .modal-footer { padding: 20px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #eee; }
.modal-close-btn { background: none; border: none; font-size: 1.8rem; cursor: pointer; color: #999; }
.radio-group { display: flex; gap: 20px; }

.button--danger {
    border-color: #dc3545;
    color: #dc3545;
}
.button--danger:hover {
    background-color: #dc3545;
    color: white;
}
#calc-resultados h4 { margin-top: 0; }

/* --- Reemplaza tus estilos de notas anteriores con estos --- */

/* Estilo para los detalles de notas, para que se integren en la lista */
.clase-card__info-detalle--nota-general,
.clase-card__info-detalle--nota-instructor {
    width: 100%; /* Ocupa todo el ancho disponible */
    margin-top: 8px;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #e9ecef;
    background-color: #f8f9fa; /* Fondo gris claro para la nota general */
    align-items: flex-start; /* Alinea el ícono con la primera línea de texto */
}

/* El texto dentro del div de la nota */
.clase-card__info-detalle--nota-general div,
.clase-card__info-detalle--nota-instructor div {
    line-height: 1.5; /* Mejora la legibilidad del texto de la nota */
    word-break: break-word; /* Evita que texto largo rompa el layout */
}

/* Estilo específico para la nota del instructor, para que destaque */
.clase-card__info-detalle--nota-instructor {
    background-color: #e7f3ff; /* Fondo azul claro */
    border-color: #b8d7ff;
    color: #004085; /* Texto oscuro para contraste */
}
/* ... (tus otros estilos) ... */

/* --- NUEVO: Estilos para las acciones en la tarjeta de clase --- */
.clase-card__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px; /* Espacio entre botones */
    align-items: center;
    justify-content: flex-end;
}
.clase-card__actions .button {
    padding: 8px 12px;
    font-size: 0.85rem;
}
.estado-completada {
    font-weight: bold;
    color: #28a745;
    margin-right: auto; /* Empuja los botones a la derecha */
}
.button.button--warning {
    background-color: #f0ad4e;
    border-color: #eea236;
    color: white;
}
.button.button--warning:hover {
    background-color: #ec971f;
    border-color: #d58512;
}
.button.button--warning {
    background-color: #f0ad4e;
    border-color: #eea236;
    color: white;
}
.button.button--warning:hover {
    background-color: #ec971f;
    border-color: #d58512;
}
.estado-completada {
    font-weight: bold;
    color: #28a745;
    margin-right: auto;
    padding: 0 10px;
}