/* ========================================
   SISTEMA DE CONVERSAS IA - DESIGN MODERNO
   INTERFACE ELEGANTE E RESPONSIVA
   ======================================== */

/* === PALETA DE CORES MODERNA === */
:root {
    /* Cores Primárias - Gradiente Azul Moderno */
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-gradient-hover: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    
    /* Cores Secundárias - Gradiente Roxo */
    --secondary-color: #8b5cf6;
    --secondary-light: #a78bfa;
    --secondary-dark: #7c3aed;
    --secondary-gradient: linear-gradient(135deg, #a855f7 0%, #c084fc 100%);
    
    /* Cores de Ação - Vibrantes */
    --success-color: #10b981;
    --success-light: #34d399;
    --success-gradient: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --warning-color: #f59e0b;
    --warning-light: #fbbf24;
    --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --danger-color: #ef4444;
    --danger-light: #f87171;
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #f87171 100%);
    --info-color: #06b6d4;
    --info-light: #22d3ee;
    --info-gradient: linear-gradient(135deg, #06b6d4 0%, #22d3ee 100%);
    
    /* Cores Neutras - Modernas */
    --light-gray: #f8fafc;
    --medium-gray: #e2e8f0;
    --dark-gray: #475569;
    --text-dark: #1e293b;
    --text-light: #475569;
    --text-muted: #64748b;
    --white: #ffffff;
    
    /* Cores de Fundo - Gradientes Suaves */
    --bg-primary: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-hover: rgba(99, 102, 241, 0.05);
    --bg-sidebar: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    
    /* Cores de Status - Gradientes */
    --status-ativo: #10b981;
    --status-pendente: #f59e0b;
    --status-finalizado: #6b7280;
    --status-cancelado: #ef4444;
    
    /* Sombras Modernas */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Bordas Arredondadas */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    
    /* Transições Suaves */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* === RESET E BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* === HEADER MODERNO === */
.header {
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    color: var(--white);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    pointer-events: none;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
}

.header-left h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-left p {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 400;
}

.header-right {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    font-size: 0.875rem;
}

.btn-primary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-danger {
    background: var(--danger-gradient);
    color: var(--white);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* === LAYOUT PRINCIPAL === */
.main-container {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 2rem;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 120px);
}

/* === PAINEL DE CONVERSAS === */
.conversations-panel {
    background: var(--bg-card);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    height: fit-content;
    max-height: calc(100vh - 200px);
    overflow: hidden;
}

.conversations-header {
    padding: 2rem 2rem 1rem 2rem;
    border-bottom: 1px solid var(--medium-gray);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.conversations-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius-xl);
    font-size: 1rem;
    background: var(--white);
    color: var(--text-dark);
    transition: all var(--transition-normal);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.search-box::before {
    content: '🔍';
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    z-index: 1;
}

.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--light-gray);
}

.conversations-list::-webkit-scrollbar {
    width: 8px;
}

.conversations-list::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: var(--border-radius-md);
}

.conversations-list::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    border-radius: var(--border-radius-md);
}

.conversations-list::-webkit-scrollbar-thumb:hover {
    background: var(--primary-gradient-hover);
}

.conversation-item {
    padding: 1.5rem;
    margin-bottom: 0.75rem;
    border-radius: var(--border-radius-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.conversation-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

.conversation-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.conversation-item:hover::before {
    opacity: 0.05;
}

.conversation-item.selected {
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.conversation-item.selected .contact-number,
.conversation-item.selected .last-message,
.conversation-item.selected .last-time {
    color: var(--white);
}

.conversation-info {
    position: relative;
    z-index: 1;
}

.contact-number {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.last-message {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.conversation-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-2xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-ativo {
    background: var(--success-gradient);
    color: var(--white);
}

.status-pendente {
    background: var(--warning-gradient);
    color: var(--white);
}

.status-finalizado {
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    color: var(--white);
}

.status-cancelado {
    background: var(--danger-gradient);
    color: var(--white);
}

.last-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* === PAINEL DE MENSAGENS === */
.messages-panel {
    background: var(--bg-card);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    height: fit-content;
    max-height: calc(100vh - 200px);
    overflow: hidden;
}

.messages-header {
    padding: 2rem;
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    color: var(--white);
    border-radius: var(--border-radius-2xl) var(--border-radius-2xl) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.messages-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    pointer-events: none;
}

.header-left {
    position: relative;
    z-index: 1;
}

.header-left h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.header-right {
    position: relative;
    z-index: 1;
}

.conversation-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-controls label {
    font-weight: 600;
    color: var(--white);
}

.status-select {
    padding: 0.5rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-lg);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-weight: 600;
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.status-select:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.btn-small {
    padding: 0.5rem;
    border-radius: var(--border-radius-lg);
    background: var(--danger-gradient);
    color: var(--white);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1.2rem;
}

.btn-small:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.messages-list {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--light-gray);
}

.messages-list::-webkit-scrollbar {
    width: 8px;
}

.messages-list::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: var(--border-radius-md);
}

.messages-list::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    border-radius: var(--border-radius-md);
}

.messages-list::-webkit-scrollbar-thumb:hover {
    background: var(--primary-gradient-hover);
}

.message-item {
    margin-bottom: 1.5rem;
    display: flex;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-item.sender-cliente {
    justify-content: flex-end;
}

.message-item.sender-ia {
    justify-content: flex-end;
}

.message-content {
    max-width: 70%;
    position: relative;
}

.message-text {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-xl);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--white);
    position: relative;
    word-wrap: break-word;
}

.sender-cliente .message-text {
    background: linear-gradient(135deg, #6b7280 0%, #9ca3af 100%);
    border-bottom-right-radius: var(--border-radius-sm);
}

.sender-ia .message-text {
    background: var(--success-gradient);
    border-bottom-right-radius: var(--border-radius-sm);
}

.message-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    padding: 0 0.5rem;
}

.sender-type {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-2xl);
}

.sender-cliente .sender-type {
    background: rgba(107, 114, 128, 0.1);
    color: #6b7280;
}

.sender-ia .sender-type {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.message-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.no-messages {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.no-messages h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.no-conversation-selected {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.no-conversation-selected h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

/* === RESPONSIVIDADE === */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1rem;
    }
    
    .conversations-panel {
        max-height: 400px;
    }
    
    .messages-panel {
        max-height: 600px;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .header-left h1 {
        font-size: 1.5rem;
    }
    
    .main-container {
        padding: 0.5rem;
    }
    
    .conversations-header,
    .messages-header {
        padding: 1.5rem;
    }
    
    .messages-list {
        padding: 1.5rem;
    }
    
    .message-content {
        max-width: 85%;
    }
}

/* === ANIMAÇÕES === */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.conversation-item,
.message-item {
    animation: fadeIn 0.3s ease-out;
}

/* === ESTADOS DE HOVER E FOCUS === */
.conversation-item:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* === MELHORIAS DE ACESSIBILIDADE === */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* === ESTADOS DE CARREGAMENTO === */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Conversa ativa/selecionada */
.conversation-item.active {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(147, 51, 234, 0.2) 100%);
    border: 2px solid var(--primary-color);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    transform: translateY(-2px);
}

.conversation-item.active .contact-number {
    color: var(--primary-color);
    font-weight: 700;
}

.conversation-item.active .last-message {
    color: var(--white);
    font-weight: 600;
}

.conversation-item.active .conversation-time {
    color: var(--primary-color);
    font-weight: 600;
}