/* ==========================================================================
   Elena Chat - Estilos Globales & Sistema de Diseño
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Variables CSS & Paleta de Colores
   -------------------------------------------------------------------------- */
:root {
    /* Paleta Principal (Elena Indigo/Violet) */
    --color-primary-50: #eef2ff;
    --color-primary-100: #e0e7ff;
    --color-primary-200: #c7d2fe;
    --color-primary-300: #a5b4fc;
    --color-primary-400: #818cf8;
    --color-primary-500: #6366f1;
    --color-primary-600: #4f46e5;
    --color-primary-700: #4338ca;
    --color-primary-800: #3730a3;
    --color-primary-900: #312e81;

    --color-primary: var(--color-primary-600);
    --color-primary-hover: var(--color-primary-700);
    --color-primary-light: var(--color-primary-50);

    /* Paleta Neutra y Superficies */
    --color-bg-app: #f8fafc;
    --color-bg-sidebar: #ffffff;
    --color-bg-chat: #f1f5f9;
    --color-bg-surface: #ffffff;
    --color-bg-hover: #f1f5f9;

    /* Burbujas de Chat */
    --bubble-outgoing-bg: #4f46e5;
    --bubble-outgoing-text: #ffffff;
    --bubble-outgoing-meta: rgba(255, 255, 255, 0.75);

    --bubble-incoming-bg: #ffffff;
    --bubble-incoming-text: #1e293b;
    --bubble-incoming-meta: #94a3b8;
    --bubble-incoming-border: #e2e8f0;

    --bubble-system-bg: #e2e8f0;
    --bubble-system-text: #475569;

    /* Colores de Texto */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-light: #cbd5e1;
    --text-inverse: #ffffff;

    /* Estados & Alertas */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;

    /* Estados de Conexión de Chat */
    --status-online: #10b981;
    --status-offline: #94a3b8;
    --status-busy: #ef4444;
    --status-away: #f59e0b;

    /* Bordes y Líneas Divisorias */
    --border-color-light: #f1f5f9;
    --border-color: #e2e8f0;
    --border-color-dark: #cbd5e1;
    --border-focus: var(--color-primary-500);

    /* Tipografía y Escala de Tamaños */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.875rem;   /* 14px */
    --text-base: 1rem;     /* 16px */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 1.875rem;  /* 30px */

    /* Radios de Esquinas */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Sombras */
    --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 -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Transición estándar */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
}

html.dark, :root.dark {
    /* Paleta Principal Oscura */
    --color-primary-50: #1e1b4b;
    --color-primary-100: #312e81;
    --color-primary-200: #3730a3;
    --color-primary-300: #4338ca;
    --color-primary-400: #6366f1;
    --color-primary-500: #818cf8;
    --color-primary-600: #6366f1;
    --color-primary-700: #a5b4fc;
    --color-primary-800: #c7d2fe;
    --color-primary-900: #e0e7ff;

    --color-primary: #818cf8;
    --color-primary-hover: #a5b4fc;
    --color-primary-light: #1e1b4b;

    /* Superficies en Modo Oscuro */
    --color-bg-app: #090d16;
    --color-bg-sidebar: #0f172a;
    --color-bg-chat: #090d16;
    --color-bg-surface: #0f172a;
    --color-bg-hover: #1e293b;

    /* Burbujas de Chat en Modo Oscuro */
    --bubble-outgoing-bg: #4f46e5;
    --bubble-outgoing-text: #ffffff;
    --bubble-outgoing-meta: rgba(255, 255, 255, 0.75);

    --bubble-incoming-bg: #1e293b;
    --bubble-incoming-text: #f8fafc;
    --bubble-incoming-meta: #94a3b8;
    --bubble-incoming-border: #334155;

    --bubble-system-bg: #1e293b;
    --bubble-system-text: #94a3b8;

    /* Textos en Modo Oscuro */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --text-light: #475569;
    --text-inverse: #090d16;

    /* Bordes en Modo Oscuro */
    --border-color-light: #1e293b;
    --border-color: #334155;
    --border-color-dark: #475569;
    --border-focus: #818cf8;

    color-scheme: dark;
}

/* --------------------------------------------------------------------------
   2. Reseteo y Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--color-bg-app);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------------------------
   3. Utilidades de Texto y Tipografía
   -------------------------------------------------------------------------- */
.text-2xs { font-size: 0.65rem !important; }
.text-xs   { font-size: var(--text-xs) !important; }
.text-sm   { font-size: var(--text-sm) !important; }
.text-base { font-size: var(--text-base) !important; }
.text-lg   { font-size: var(--text-lg) !important; }
.text-xl   { font-size: var(--text-xl) !important; }
.text-2xl  { font-size: var(--text-2xl) !important; }
.text-3xl  { font-size: var(--text-3xl) !important; }

.text-color-primary   { color: var(--color-primary) !important; }
.text-color-secondary { color: var(--text-secondary) !important; }
.text-color-muted     { color: var(--text-muted) !important; }
.text-color-light     { color: var(--text-light) !important; }
.text-color-inverse   { color: var(--text-inverse) !important; }
.text-color-danger    { color: var(--color-danger) !important; }
.text-color-success   { color: var(--color-success) !important; }

/* --------------------------------------------------------------------------
   4. Botones (.btn)
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    font-size: var(--text-sm);
    line-height: 1.25rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    outline: none;
    text-decoration: none;
    user-select: none;
}

.btn:disabled, .btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.4);
}

/* Variantes de Botones */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
}

.btn-secondary {
    background-color: #f1f5f9;
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #e2e8f0;
    color: var(--text-primary);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary-50);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background-color: var(--color-bg-hover);
    color: var(--text-primary);
}

.btn-danger {
    background-color: var(--color-danger);
    color: var(--text-inverse);
}

.btn-danger:hover {
    background-color: #dc2626;
}

/* Tamaños de Botones */
.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: var(--text-xs);
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

/* Botón Icono para Acciones de Chat (Enviar, Adjuntar, Emoji) */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    border-radius: var(--radius-full);
    border: none;
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-primary);
}

.btn-icon-primary {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

.btn-icon-primary:hover {
    background-color: var(--color-primary-hover);
    color: var(--text-inverse);
}

/* --------------------------------------------------------------------------
   5. Formularios e Inputs (form-label, form-input, form-input-group)
   -------------------------------------------------------------------------- */
.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.form-label-required::after {
    content: " *";
    color: var(--color-danger);
}

.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: var(--text-sm);
    font-family: inherit;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

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

.form-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-input:disabled {
    background-color: #f8fafc;
    color: var(--text-muted);
    cursor: not-allowed;
}

.form-input-error {
    border-color: var(--color-danger) !important;
}

.form-input-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2) !important;
}

/* Área de Texto / Textarea para Chat */
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: var(--text-sm);
    font-family: inherit;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    resize: none;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Form Input Group (Barra de entrada de mensajes o búsqueda con iconos/botones) */
.form-input-group {
    display: flex;
    align-items: center;
    position: relative;
    width: 100%;
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.25rem 0.5rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input-group:focus-within {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-input-group .form-input,
.form-input-group .form-textarea {
    border: none;
    box-shadow: none;
    padding: 0.5rem 0.75rem;
    background: transparent;
}

.form-input-group .form-input:focus,
.form-input-group .form-textarea:focus {
    box-shadow: none;
    border: none;
}

.form-input-addon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    padding: 0 0.5rem;
}

.form-hint {
    margin-top: 0.25rem;
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.form-error {
    margin-top: 0.25rem;
    font-size: var(--text-xs);
    color: var(--color-danger);
}

/* --------------------------------------------------------------------------
   6. Componentes Especializados para Chat
   -------------------------------------------------------------------------- */
/* Burbujas de Mensaje */
.chat-bubble {
    position: relative;
    max-width: 75%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    line-height: 1.4;
    word-break: break-word;
    box-shadow: var(--shadow-sm);
}

/* Mensaje Enviado (Outgoing / Usuario) */
.chat-bubble-outgoing {
    margin-left: auto;
    background-color: var(--bubble-outgoing-bg);
    color: var(--bubble-outgoing-text);
    border-bottom-right-radius: var(--radius-sm);
}

.chat-bubble-outgoing .chat-time {
    color: var(--bubble-outgoing-meta);
}

/* Mensaje Recibido (Incoming / Contacto o Bot) */
.chat-bubble-incoming {
    margin-right: auto;
    background-color: var(--bubble-incoming-bg);
    color: var(--bubble-incoming-text);
    border: 1px solid var(--bubble-incoming-border);
    border-bottom-left-radius: var(--radius-sm);
}

.chat-bubble-incoming .chat-time {
    color: var(--bubble-incoming-meta);
}

/* Mensaje del Sistema / Separador de Fecha */
.chat-bubble-system {
    margin: 1rem auto;
    background-color: var(--bubble-system-bg);
    color: var(--bubble-system-text);
    font-size: var(--text-xs);
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    text-align: center;
    max-width: fit-content;
}

/* Metadatos y Tiempo del Mensaje */
.chat-time {
    display: inline-block;
    font-size: var(--text-xs);
    margin-top: 0.25rem;
    float: right;
    margin-left: 0.5rem;
}

/* Avatares y Estados de Conexión */
.chat-avatar-container {
    position: relative;
    display: inline-flex;
    flex-shrink: 0;
}

.chat-avatar {
    border-radius: var(--radius-full);
    object-fit: cover;
    background-color: var(--color-primary-100);
    color: var(--color-primary-700);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.avatar-sm { width: 2rem; height: 2rem; font-size: var(--text-xs); }
.avatar-md { width: 2.5rem; height: 2.5rem; font-size: var(--text-sm); }
.avatar-lg { width: 3.25rem; height: 3.25rem; font-size: var(--text-base); }

/* Indicador de Estado (Online, Offline, Ausente) */
.status-dot {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0.75rem;
    height: 0.75rem;
    border-radius: var(--radius-full);
    border: 2px solid #ffffff;
}

.status-online  { background-color: var(--status-online); }
.status-offline { background-color: var(--status-offline); }
.status-away    { background-color: var(--status-away); }
.status-busy    { background-color: var(--status-busy); }

/* Elemento de Lista de Conversación (Sidebar) */
.chat-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    text-decoration: none;
    color: inherit;
}

.chat-item:hover {
    background-color: var(--color-bg-hover);
}

.chat-item.active {
    background-color: var(--color-primary-50);
}

.chat-item.active .chat-item-name {
    color: var(--color-primary-700);
}

/* Insignias / Badges (Mensajes no leídos) */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.15rem 0.45rem;
    font-size: var(--text-xs);
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-full);
}

.badge-unread {
    background-color: var(--color-primary);
    color: var(--text-inverse);
    min-width: 1.25rem;
    height: 1.25rem;
}

/* --------------------------------------------------------------------------
   7. Scrollbar Personalizado & Directivas Vue
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Ocultar elementos Vue con v-cloak antes del montaje */
[v-cloak] {
    display: none !important;
}

/* --------------------------------------------------------------------------
   8. Componente Toast (Notificaciones)
   -------------------------------------------------------------------------- */
.toast-container {
    position: fixed;
    top: 1.25rem;
    right: 1.25rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
    max-width: 90vw;
}

.toast {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.125rem;
    background-color: #ffffff;
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    min-width: 280px;
    max-width: 400px;
    pointer-events: auto;
    animation: toast-slide-in 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transition: all var(--transition-fast);
}

.toast-success {
    border-left: 4px solid var(--color-success);
}
.toast-success .toast-icon {
    color: var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-danger);
}
.toast-error .toast-icon {
    color: var(--color-danger);
}

.toast-warning {
    border-left: 4px solid var(--color-warning);
}
.toast-warning .toast-icon {
    color: var(--color-warning);
}

.toast-info {
    border-left: 4px solid var(--color-info);
}
.toast-info .toast-icon {
    color: var(--color-info);
}

.toast-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.toast-title {
    font-weight: 600;
    font-size: var(--text-sm);
    line-height: 1.2;
}

.toast-message {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.toast-close {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
}

@keyframes toast-slide-in {
    from {
        opacity: 0;
        transform: translateY(-12px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* --------------------------------------------------------------------------
   9. Componente Tabla Personalizada
   -------------------------------------------------------------------------- */
.table-card {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table-custom {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.table-custom th {
    background-color: var(--color-bg-app);
    color: var(--text-secondary);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.table-custom td {
    padding: 1rem;
    font-size: var(--text-sm);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color-light);
    vertical-align: middle;
}

.table-custom tbody tr {
    transition: background-color var(--transition-fast);
}

.table-custom tbody tr:hover {
    background-color: var(--color-bg-hover);
}

.table-custom tbody tr:last-child td {
    border-bottom: none;
}

/* --------------------------------------------------------------------------
   10. Adaptaciones de Modo Oscuro para Componentes del Sistema
   -------------------------------------------------------------------------- */
html.dark .form-input,
html.dark .form-textarea {
    background-color: #1e293b;
    color: #f8fafc;
    border-color: #334155;
}

html.dark .form-input:focus,
html.dark .form-textarea:focus {
    border-color: #818cf8;
}

html.dark .form-input-group {
    background-color: #1e293b;
    border-color: #334155;
}

html.dark .form-input-group .form-input,
html.dark .form-input-group .form-textarea {
    background-color: transparent !important;
}

html.dark .btn-secondary {
    background-color: #1e293b;
    color: #f8fafc;
    border-color: #334155;
}

html.dark .btn-secondary:hover {
    background-color: #334155;
    color: #ffffff;
}

html.dark .btn-icon:hover {
    background-color: #1e293b;
    color: #818cf8;
}

html.dark .table-card {
    background-color: #0f172a;
    border-color: #334155;
}

html.dark .table-custom th {
    background-color: #1e293b;
    color: #cbd5e1;
    border-color: #334155;
}

html.dark .table-custom td {
    color: #f8fafc;
    border-color: #1e293b;
}

html.dark .table-custom tbody tr:hover {
    background-color: #1e293b;
}

html.dark .chat-item {
    color: #f8fafc;
}

html.dark .chat-item:hover {
    background-color: #1e293b;
}

html.dark .chat-item.active {
    background-color: rgba(99, 102, 241, 0.2);
}

html.dark .chat-item.active .chat-item-name {
    color: #a5b4fc;
}

html.dark .status-dot {
    border-color: #0f172a;
}

html.dark .toast {
    background-color: #1e293b;
    border-color: #334155;
    color: #f8fafc;
}

html.dark .toast-title {
    color: #f8fafc;
}

html.dark .toast-message {
    color: #cbd5e1;
}

html.dark ::-webkit-scrollbar-thumb {
    background: #475569;
}

html.dark ::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}