/* Estilos generales y modo oscuro */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    margin: 0;
    padding: 0;
    padding-bottom: 20px;
}

header {
    position: relative; /* ¡NECESARIO para posicionar el botón dentro! */
    background-color: #1e1e1e;
    padding: 15px 20px;
    border-bottom: 1px solid #333;
    text-align: center;
}

h1, h2 {
    color: #ffffff;
    margin-top: 0;
    margin-bottom: 1rem;
}

main {
    padding: 20px;
    padding-top: 60px; /* AJUSTA ESTE VALOR SI ES NECESARIO */
}

section {
    background-color: #1e1e1e;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

/* --- Estilos para la Cuadrícula de Trackers --- */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 15px;
}

/* --- Estilo de Tarjeta Tracker --- */
.tracker-card {
    position: relative; /* Para el botón de editar */
    background-color: #333;
    border-radius: 12px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100px;
    color: #e0e0e0;
}
.tracker-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}
.tracker-card:active {
    transform: scale(0.98);
    background-color: #3367D6;
}
.card-icon {
    font-size: 2.5rem;
    line-height: 1;
}
.card-name {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 10px;
    display: block; /* Asegura que el progreso/último log vaya abajo */
}
.card-last-log, .card-progreso {
    font-size: 0.8rem;
    color: #aaa;
    margin-top: 5px;
    display: block; /* Asegura que no se ponga al lado del nombre */
}
.card-edit-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 4px 6px;
    background-color: rgba(0,0,0,0.2);
    border-radius: 5px;
    opacity: 0.3;
    transition: all 0.2s ease;
}
.tracker-card:hover .card-edit-btn {
    opacity: 1;
}
.card-edit-btn:hover {
    background-color: rgba(0,0,0,0.5);
}
.tracker-card[data-tracker-id="nuevo"] {
    background-color: #2a2a2a;
    border: 2px dashed #444;
    align-items: center;
    justify-content: center;
}

/* --- Estilos para Dashboard y Gráficos --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 15px;
    margin-top: 20px;
}
.chart-container {
    /* ... tus estilos existentes ... */
    position: relative;
    height: 300px;
    width: 100%;
    overflow: hidden; /* ¡NUEVO! Evita que el canvas desborde */
}

/* --- Estilos para Selector de Rango --- */
.rango-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.rango-btn {
    padding: 8px 15px;
    border: 1px solid #555;
    background-color: #333;
    color: #e0e0e0;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}
.rango-btn:hover {
    background-color: #444;
}
.rango-btn.active {
    background-color: #3367D6;
    border-color: #3367D6;
    color: #fff;
    font-weight: 600;
}

/* --- Estilos para la Timeline --- */
#timeline {
    background-color: #1e1e1e;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}
#timeline-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
    max-height: 500px;
    overflow-y: auto;
}
.timeline-item {
    background-color: #333;
    border-radius: 8px;
    padding: 12px 15px;
    display: flex;
    flex-direction: column;
    border-left: 4px solid #555;
}
.item-header {
    display: flex;
    align-items: center;
    gap: 10px;
}
.item-icon {
    font-size: 1.2rem;
}
.item-name {
    font-weight: 600;
    font-size: 1rem;
    color: #fff;
}
.item-time {
    font-size: 0.8rem;
    color: #aaa;
    margin-left: auto;
}
.item-body {
    margin-top: 8px;
    padding-left: 28px;
}
.item-valor {
    font-weight: 500;
    color: #e0e0e0;
}
.item-nota {
    font-style: italic;
    color: #bbb;
    margin-top: 4px;
    display: block;
}

/* --- Estilos para la Navegación por Pestañas --- */
.app-nav {
    display: flex;
    background-color: #1e1e1e; /* Fondo para tapar contenido */
    padding: 0 10px;
    border-bottom: 1px solid #333;
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    box-sizing: border-box;
}
.nav-btn {
    flex: 1;
    padding: 14px 10px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: #aaa;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
}
.nav-btn:hover {
    color: #fff;
    background-color: #2a2a2a;
}
.nav-btn.active {
    color: #e0e0e0;
    border-bottom: 3px solid #3367D6;
}
.view {
    display: none;
}
.view.active {
    display: block;
}

/* --- Estilos para Modales --- */
#modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    transition: opacity 0.3s ease;
}
#nuevo-tracker-modal, #registro-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #1e1e1e;
    border-radius: 12px;
    padding: 25px;
    width: 90%;
    max-width: 500px;
    z-index: 2001;
    box-shadow: 0 5px 20px rgba(0,0,0,0.4);
    transition: opacity 0.3s ease, top 0.3s ease;
}
.oculto {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
#nuevo-tracker-modal.oculto, #registro-modal.oculto {
    top: 45%;
}
.form-grupo {
    margin-bottom: 20px;
}
.form-grupo label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #ccc;
}
.form-grupo input[type="text"],
.form-grupo input[type="number"],
.form-grupo select,
.form-grupo textarea {
    width: 100%;
    padding: 12px;
    background-color: #333;
    border: 1px solid #555;
    border-radius: 8px;
    color: #e0e0e0;
    font-size: 1rem;
    box-sizing: border-box;
}
.form-grupo textarea {
    resize: vertical; /* Permitir redimensionar verticalmente */
}
.form-botones {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 25px;
}
.form-botones button {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}
.btn-primario {
    background-color: #3367D6;
    color: white;
}
.btn-primario:hover {
    background-color: #4a80f5;
}
.btn-secundario {
    background-color: #555;
    color: #e0e0e0;
}
.btn-secundario:hover {
    background-color: #666;
}
.btn-peligro {
    background-color: #D32F2F;
    color: white;
}
.btn-peligro:hover {
    background-color: #E53935;
}
#btn-eliminar.oculto {
    display: none;
}
.form-grupo-meta {
    display: flex;
    gap: 15px;
}
.form-grupo-meta .form-grupo {
    flex: 1;
}

/* --- Estilos para el Modal de REGISTRO --- */
#registro-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #333;
}
#registro-icono {
    font-size: 2rem;
}
#registro-header h2 {
    margin: 0;
    color: #fff;
}
#registro-form .form-grupo.oculto {
    display: none;
}
.registro-input {
    width: 100%;
    padding: 12px;
    background-color: #333;
    border: 1px solid #555;
    border-radius: 8px;
    color: #e0e0e0;
    font-size: 1.2rem;
    box-sizing: border-box;
    text-align: center;
}
.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
}
#registro-valor-slider {
    flex-grow: 1;
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 10px;
    background: #444;
    outline: none;
    opacity: 0.7;
    -webkit-transition: .2s;
    transition: opacity .2s;
    border-radius: 5px;
}
#registro-valor-slider:hover {
    opacity: 1;
}
#registro-valor-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: #3367D6;
    cursor: pointer;
    border-radius: 50%;
}
#registro-valor-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: #3367D6;
    cursor: pointer;
    border-radius: 50%;
    border: none;
}
#slider-value-display {
    font-size: 1.2rem;
    font-weight: bold;
    color: #fff;
    min-width: 40px;
    text-align: center;
}

/* --- Estilos para Toast (Mensajes Temporales) --- */
#toast-placeholder {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000; /* Asegura que esté por encima de todo */
    width: 90%;
    max-width: 500px;
    pointer-events: none; /* Para no interferir con clics */
    display: flex;
    flex-direction: column;
    align-items: center;
}
.toast {
    background-color: #333;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9em;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    margin-top: 10px;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    pointer-events: auto; /* El toast sí debe ser interactuable si tuviera botones */
}
.toast.error {
    background-color: #D32F2F;
}
/* --- Estilos ESPECÍFICOS para login.html --- */
body.login-page { /* Añadiremos esta clase al body en login.html */
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #121212;
    padding: 20px; /* Añadir padding por si el contenedor es muy grande */
    box-sizing: border-box;
}

.login-container {
    background-color: #1e1e1e;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    width: 100%; /* Ajustar al padding del body */
    max-width: 400px;
    text-align: center;
}

.login-container h1 {
    margin-top: 0; /* Quitar margen superior default */
    margin-bottom: 25px;
    color: #fff;
}

/* Sobreescribir estilos de form-grupo si es necesario */
.login-container .form-grupo {
    margin-bottom: 20px;
    text-align: left;
}

.login-container .form-grupo label {
    display: block; /* Asegura que esté encima */
    margin-bottom: 8px; /* Espacio entre label e input */
    font-weight: 500;
    color: #ccc;
}

/* Asegurar estilos de input correctos */
.login-container .form-grupo input[type="text"],
.login-container .form-grupo input[type="password"] {
    width: 100%;
    padding: 12px;
    background-color: #333;
    border: 1px solid #555;
    border-radius: 8px;
    color: #e0e0e0;
    font-size: 1rem;
    box-sizing: border-box; /* Crucial */
}

/* Centrar botón */
.login-container .form-botones {
    justify-content: center;
    margin-top: 30px;
}

/* Mensaje de error */
#error-message {
    color: #D32F2F;
    margin-top: 15px;
    font-size: 0.9em;
    min-height: 1.2em; /* Espacio reservado */
    text-align: center; /* Centrar mensaje de error */
}
#logout-button {
    position: absolute; /* Siempre absoluto */
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    padding: 8px 15px;
    font-size: 0.9rem;
    font-weight: 500;
    background-color: #3a3a3a;
    color: #e0e0e0;
    border: 1px solid #555;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 5; /* Asegura que esté sobre el título si se superponen */
}
#logout-button:hover {
    background-color: #4a4a4a;
    border-color: #666;
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}