/**
 * Nexwey Chatbot Styles - Versión Iframe
 * Ocupa 100% del viewport, sin botón flotante
 */

/* ============================================
   VARIABLES CSS
   ============================================ */
:root {
    /* Colores marca */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #0f172a;
    --color-accent: #06b6d4;
    
    /* Estados */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Neutros */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    
    /* Tipografía */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    
    /* Bordes */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    
    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ============================================
   RESET Y BASE
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden; /* Prevenir scroll doble en iframe */
}

body {
    font-family: var(--font-family);
    line-height: 1.5;
    color: var(--color-gray-800);
    background-color: var(--color-gray-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Modo iframe específico */
body.iframe-mode {
    display: flex;
    flex-direction: column;
}

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

/* ============================================
   CONTENEDOR PRINCIPAL (FULLSCREEN)
   ============================================ */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height para móviles */
    width: 100%;
    background-color: var(--color-white);
    position: relative;
}

/* ============================================
   HEADER
   ============================================ */
.chat-header {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-gray-800) 100%);
    color: var(--color-white);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.chat-header__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.chat-header__logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.chat-header__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin: 0;
    line-height: 1.2;
}

.chat-header__status {
    font-size: var(--font-size-xs);
    color: var(--color-gray-300);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: 2px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--color-success);
    border-radius: 50%;
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.chat-header__close {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--color-gray-300);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.chat-header__close:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}

/* ============================================
   ÁREA DE MENSAJES (SCROLLABLE)
   ============================================ */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-lg);
    background-color: var(--color-gray-50);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch; /* Smooth scroll iOS */
}

/* Scrollbar personalizada */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background-color: var(--color-gray-300);
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-gray-400);
}

/* ============================================
   BURBUJAS DE MENSAJE
   ============================================ */
.message {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 85%;
    animation: messageSlide 0.3s ease;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message--user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message--bot {
    align-self: flex-start;
}

.message__avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
    margin-top: 4px;
    user-select: none;
}

.message--user .message__avatar {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.message__content {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message--user .message__content {
    background: linear-gradient(135deg, #ffffff 0%, #9198a2 100%);
    color: var(--color-white);
    border-bottom-right-radius: 4px;
}

.message--bot .message__content {
    background-color: var(--color-white);
    border-bottom-left-radius: 4px;
}

.message__text {
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: inherit;
}

.message__text strong {
    font-weight: 600;
}

.message__list {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.message__list li {
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-600);
}

.message--user .message__list li {
    color: rgba(255, 255, 255, 0.9);
}

.message__time {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    margin-top: var(--spacing-xs);
    text-align: right;
    opacity: 0.8;
}

.message--user .message__time {
    color: rgb(4, 1, 57);
}

/* ============================================
   INDICADOR "ESCRIBIENDO..."
   ============================================ */
.typing-indicator {
    padding: 0 var(--spacing-lg);
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-base);
    height: 0;
    overflow: hidden;
}

.typing-indicator.active {
    opacity: 1;
    transform: translateY(0);
    height: auto;
    padding-bottom: var(--spacing-md);
}

.typing-indicator__content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border-bottom-left-radius: 4px;
    box-shadow: var(--shadow-sm);
    width: fit-content;
    margin-left: 40px;
}

.typing-indicator__dots {
    display: flex;
    gap: 4px;
}

.typing-indicator__dots span {
    width: 8px;
    height: 8px;
    background-color: var(--color-gray-400);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-indicator__dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator__dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingBounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

.typing-indicator__text {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    font-style: italic;
}

/* ============================================
   ÁREA DE INPUT (FIJA ABAJO)
   ============================================ */
.chat-input-area {
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    flex-shrink: 0;
    z-index: 10;
}

.chat-form {
    width: 100%;
}

.chat-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    background-color: var(--color-gray-100);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xs);
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.chat-input-wrapper:focus-within {
    border-color: var(--color-primary-light);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.chat-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    font-size: var(--font-size-sm);
    color: var(--color-gray-800);
    resize: none;
    outline: none;
    max-height: 120px;
    min-height: 44px;
    line-height: 1.5;
}

.chat-input::placeholder {
    color: var(--color-gray-400);
}

.chat-submit {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-primary);
    border: none;
    color: var(--color-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.chat-submit:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    transform: scale(1.05);
}

.chat-submit:disabled {
    background-color: var(--color-gray-300);
    cursor: not-allowed;
    opacity: 0.6;
}

.chat-input-meta {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
}

.chat-input-hint,
.char-count {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

.char-count.warning { color: var(--color-warning); }
.char-count.danger { color: var(--color-error); }

/* ============================================
   NOTIFICACIÓN DE ERROR DE CONEXIÓN
   ============================================ */
.connection-error {
    position: fixed;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-error);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    z-index: 100;
    animation: slideDown 0.3s ease;
}

.connection-error[hidden] {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.connection-error__icon {
    font-size: var(--font-size-lg);
}

/* ============================================
   ESTADOS DE ERROR EN MENSAJES
   ============================================ */
.message--error .message__content {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 480px) {
    .chat-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .chat-header__logo {
        width: 36px;
        height: 36px;
    }
    
    .chat-messages {
        padding: var(--spacing-md);
    }
    
    .message {
        max-width: 90%;
    }
    
    .typing-indicator__content {
        margin-left: var(--spacing-sm);
    }
    
    .chat-input-area {
        padding: var(--spacing-sm);
    }
}

/* Ajustes para iframe muy pequeños */
@media (max-height: 500px) {
    .chat-header__status {
        display: none;
    }
    
    .chat-input-hint {
        display: none;
    }
}

/* Soporte para modo oscuro del sistema */
@media (prefers-color-scheme: dark) {
    :root {
        --color-gray-50: #ffffff;
        --color-gray-100: #6c6c6c;
        --color-white: #ffffff;
    }
    
    .chat-messages {
        background-color: var(--color-gray-900);
    }
    
    .message__content {
        background-color: var(--color-gray-800);
        color: var(--color-gray-100);
    }
    
    .message__text {
        color: var(--color-gray-100);
    }
    
    .chat-input-area {
        background-color: var(--color-gray-800);
        border-color: var(--color-gray-700);
    }
    
    .chat-input-wrapper {
        background-color: var(--color-gray-900);
    }
    
    .chat-input-wrapper:focus-within {
        background-color: var(--color-gray-800);
    }
    
    .chat-input {
        color: whitesmoke;
    }
    
    .chat-input::placeholder {
        color: var(--color-gray-500);
    }
}