/* ============================================
   VARIABLES Y CONFIGURACIÓN GLOBAL (Consolidado)
   ============================================ */

:root {
    /* 🎨 PALETA DE COLORES PROFESIONAL */
    --color-navy-dark: #0A2540;          /* Principal Oscuro */
    --color-navy-light: #1F3A5F;         /* Principal Claro */
    --color-neutral-dark: #1F2937;       /* Gris Oscuro (Secundario) */
    --color-accent: #2563EB;             /* Azul Vibrante (Énfasis) */
    --color-accent-hover: #1d4ed8;       /* Azul Hover */
    
    /* ⚪ FONDOS Y TEXTOS */
    --color-bg-page: #F9FAFB;            /* Fondo de la página (Claro) */
    --color-bg-surface: #FFFFFF;         /* Fondo de la superficie/cajas (Blanco) */
    --color-text-primary: #111827;       /* Texto principal */
    --color-text-secondary: #6B7280;     /* Texto secundario/descriptivo */
    --color-text-muted: #9CA3AF;         /* Texto silenciado */
    
    /* 🧱 BORDES Y DIVISORES */
    --color-border-default: #E5E7EB;     /* Borde estándar */
    --color-border-light: #F3F4F6;       /* Borde claro */
    
    /* 🔔 ESTADOS (Manejo de retroalimentación) */
    --color-error: #DC2626;              /* Rojo error */
    --color-error-bg: #FEE2E2;           /* Fondo error */
    --color-success: #10B981;            /* Verde éxito */
    
    /* 📏 ESPACIADO (Sistema basado en múltiplos de 8px) */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* 🖋️ TIPOGRAFÍA */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Merriweather', serif; /* Para títulos elegantes */
    --font-mono: 'Courier New', monospace;

    /* ⚙️ UTILIDADES */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    --transition-duration-fast: 150ms;
    --transition-duration-base: 250ms;
    --transition-timing-function: ease-in-out;
}

/* ============================================
   RESET Y ESTILOS BASE
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eef5 50%, #f0f4f9 100%); 
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* ============================================
   SECCIÓN DE LOGIN
   ============================================ */

.login-container {
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-navy-dark) 0%, var(--color-navy-light) 100%);
    position: relative;
    overflow: hidden;
}

/* Efecto de fondo animado flotante */
.login-container::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%; 
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: float 30s linear infinite; 
    pointer-events: none;
}

/* Animación de flotación suave */
@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-60px, -60px); } 
}

/* Centrar el contenido del login */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center; /* Centra horizontalmente el login-box */
    width: 100%;
    max-width: 1200px;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* Caja de login con animación de entrada */
.login-box {
    background: var(--color-bg-surface);
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-radius: var(--spacing-md);
    box-shadow: var(--shadow-2xl);
    max-width: 440px; 
    width: 100%;
    animation: slideInUp 0.6s var(--transition-timing-function);
    border: 1px solid var(--color-border-default);
}

/* Animación de entrada desde abajo */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(var(--spacing-lg));
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo {
    height: 90px;
    margin-bottom: var(--spacing-md);
    animation: fadeInDown 0.6s var(--transition-timing-function);
}

/* Miniatura de imagen decorativa (oculta en escritorio) */
.login-image-thumbnail {
    display: none; /* Oculto por defecto en escritorio */
    width: 100%;
    height: 200px;
    background: url('logo.jpeg') center/cover no-repeat;
    border-radius: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    animation: fadeInDown 0.7s var(--transition-timing-function) 0.1s both;
    border: 2px solid var(--color-border-light);
}

.login-box h1 {
    font-size: 30px;
    font-weight: 700;
    color: var(--color-navy-dark);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-secondary);
}

.login-subtitle {
    font-size: 15px;
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* Animación de entrada desde arriba */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(calc(var(--spacing-md) * -1));
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    padding: 12px 14px;
    border: 1px solid var(--color-border-default);
    border-radius: 8px;
    font-size: 14px;
    font-family: var(--font-primary);
    transition: all var(--transition-duration-base) var(--transition-timing-function);
    background-color: var(--color-bg-surface);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2); 
    background-color: var(--color-bg-surface);
}

.form-group input::placeholder {
    color: var(--color-text-muted);
}

/* 🚀 Botón Principal (.btn-primary) */
.btn-primary {
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all var(--transition-duration-base) var(--transition-timing-function);
    margin-top: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -150%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.4s ease-out;
    pointer-events: none;
}

.btn-primary:hover::before {
    left: 150%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 🚨 Mensaje de Error (.alert-error) */
.alert-error {
    display: none;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid var(--color-error);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    animation: shake 0.4s ease-in-out;
    margin-top: var(--spacing-sm);
}

/* Animación de sacudida para errores */
@keyframes shake {
    10%, 90% { transform: translateX(-1px); }
    20%, 80% { transform: translateX(2px); }
    30%, 50%, 70% { transform: translateX(-4px); }
    40%, 60% { transform: translateX(4px); }
}

/* ============================================
   SECCIÓN DE DASHBOARD
   ============================================ */

.dashboard {
    display: none;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    background: linear-gradient(135deg, var(--color-accent) 0%, #0364d3 50%, #086eeb 100%);
    position: relative;
    overflow: hidden;
}

/* Fondo decorativo del dashboard */
.dashboard::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Header del dashboard */
.dashboard-header {
    min-height: 72px; 
    background: rgba(var(--color-navy-dark), 0.8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    gap: var(--spacing-md);
    animation: slideDownHeader 0.7s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    z-index: 10;
    backdrop-filter: blur(8px);
    flex-wrap: wrap;
}

/* Animación de entrada suave del header */
@keyframes slideDownHeader {
    from {
        opacity: 0;
        transform: translateY(-100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

/* Reloj digital */
.clock {
    font-size: 16px;
    font-weight: 600;
    color: white;
    font-family: var(--font-mono);
    letter-spacing: 1.5px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Título del header con serif */
.header-text h2 {
    font-size: 20px;
    font-weight: 700;
    color: white;
    font-family: var(--font-secondary);
    letter-spacing: 0.3px;
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
    flex-wrap: wrap;
    justify-content: flex-end;
}

/* Información del usuario */
.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 14px;
}

/* Nombre del usuario */
.user-name {
    color: white;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.icon-user {
    width: 20px;
    height: 20px;
    color: rgba(255, 255, 255, 0.85);
}

/* 🚪 Botón Secundario (.btn-secondary) */
.btn-secondary {
    padding: 8px 16px;
    background-color: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 6px; 
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all var(--transition-duration-fast) var(--transition-timing-function);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-1px);
}

/* Main del dashboard */
.dashboard-main {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.content-wrapper {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-xl); /* Espacio alrededor del iframe */
    display: flex;
    flex-direction: column;
    position: relative; /* CLAVE para posicionar el overlay */
}

/* Contenedor del iframe */
.iframe-container {
    flex: 1;
    width: 100%;
    overflow: hidden;
    position: relative; /* CLAVE para que el overlay se posicione bien */
    background: white;
    border-radius: var(--spacing-sm);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border-default);
}

/* Iframe responsive */
.iframe-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    /* Controlar la opacidad del iframe al cargar */
    opacity: 0; 
    transition: opacity 0.5s ease-in-out;
}

/* Utilidades para accesibilidad */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   ESTILOS DE PANTALLA DE CARGA (Loading Overlay)
   ============================================ */

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Fondo semi-transparente blanco para el efecto de tarjeta */
    background-color: var(--color-bg-surface); 
    border-radius: var(--spacing-sm);
    z-index: 5; /* Asegura que esté sobre el iframe */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    
    /* Animación de entrada: aparece suavemente */
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}

/* Ocultar el overlay después de cargar (manejo por JS) */
.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden; /* Asegura que no estorbe */
    pointer-events: none; /* Permite clickear el iframe por debajo */
}

/* CLAVE: Mostrar el Iframe cuando el overlay está oculto */
.loading-overlay.hidden + .iframe-container iframe {
    opacity: 1;
}

/* Estilo del Spinner (el círculo animado) */
.spinner {
    border: 5px solid var(--color-border-default);
    border-top: 5px solid var(--color-navy-light); /* Color del borde de la animación */
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1.5s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Estilo del botón de mensaje de carga */
.btn-loading {
    padding: 12px 24px;
    background-color: var(--color-navy-dark);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: default; /* No es clickeable, solo informativo */
    box-shadow: var(--shadow-md);
}


/* ============================================
   RESPONSIVIDAD
   ============================================ */

/* Escritorio Pequeño */
@media (min-width: 1025px) {
    .login-wrapper {
        justify-content: center;
    }
    .login-image-thumbnail {
        display: none;
    }
    .login-box {
        max-width: 440px;
    }
}

/* Tablets (769px - 1024px) */
@media (max-width: 1024px) {
    .login-image-thumbnail {
        display: none;
    }
    
    .login-wrapper {
        gap: var(--spacing-lg);
    }
    .login-box {
        padding: var(--spacing-2xl) var(--spacing-lg);
        max-width: 400px;
    }
    
    /* Dashboard */
    .dashboard-header {
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    .header-text h2 {
        font-size: 18px;
    }
    .content-wrapper {
        padding: var(--spacing-md) var(--spacing-lg);
    }
}

/* Móviles (Menos de 768px) */
@media (max-width: 768px) {
    .login-container {
        align-items: flex-start; 
        padding-top: var(--spacing-xl);
    }
    .login-wrapper {
        padding: var(--spacing-md);
    }
    .login-box {
        max-width: 100%;
        padding: var(--spacing-lg);
    }
    .login-logo {
        height: 70px;
    }
    /* La miniatura DEBE mostrarse aquí para tener algo de imagen */
    .login-image-thumbnail {
        height: 150px;
        display: block; 
    }

    /* Dashboard: Layout apilado */
    .dashboard-header {
        height: auto; 
        padding: var(--spacing-sm) var(--spacing-md);
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .header-left, .header-center, .header-right {
        width: 100%;
        justify-content: space-between;
        gap: var(--spacing-md);
    }

    .header-left {
        order: 1; 
    }
    .header-center {
        order: 3; 
        justify-content: center;
    }
    .header-right {
        order: 2; 
        justify-content: space-between;
    }
    
    .header-text h2 {
        font-size: 16px;
    }
    .clock {
        font-size: 15px;
    }
    .user-name, .btn-secondary {
        font-size: 12px;
    }
    
    .content-wrapper {
        padding: var(--spacing-md) var(--spacing-md);
    }
}