/**
 * RBAI Platform - Public Styles
 * Reality Beyond AI - Frontend CSS
 * Inspirado no Character.AI com design moderno
 */

/* ========================================
   VARIÁVEIS CSS (Custom Properties)
======================================== */
:root {
    /* Cores Principais */
    --rbai-primary: #6366f1;
    --rbai-primary-hover: #4f46e5;
    --rbai-secondary: #8b5cf6;
    --rbai-accent: #06b6d4;
    
    /* Gradientes */
    --rbai-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --rbai-gradient-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #0891b2 100%);
    
    /* Neutros */
    --rbai-dark: #0f172a;
    --rbai-dark-light: #1e293b;
    --rbai-gray: #64748b;
    --rbai-gray-light: #94a3b8;
    --rbai-white: #ffffff;
    --rbai-bg: #f8fafc;
    
    /* Cores de Categoria */
    --categoria-relacionamento: #ec4899;
    --categoria-motivacional: #f59e0b;
    --categoria-personagens: #8b5cf6;
    --categoria-espiritualidade: #06b6d4;
    
    /* Sombras */
    --rbai-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --rbai-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --rbai-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --rbai-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transições */
    --rbai-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --rbai-transition-fast: all 0.15s ease;
}

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

.rbai-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.rbai-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.5rem;
}

.rbai-col {
    flex: 1;
    padding: 0 0.5rem;
}

/* ========================================
   HEADER E NAVEGAÇÃO
======================================== */
.rbai-header {
    background: var(--rbai-white);
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.rbai-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.rbai-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--rbai-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.rbai-logo img {
    width: 40px;
    height: 40px;
    margin-right: 0.5rem;
}

.rbai-nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2rem;
}

.rbai-nav-links a {
    color: var(--rbai-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--rbai-transition);
    position: relative;
}

.rbai-nav-links a:hover {
    color: var(--rbai-primary);
}

.rbai-nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--rbai-gradient);
    transition: var(--rbai-transition);
}

.rbai-nav-links a:hover::after {
    width: 100%;
}

/* ========================================
   BOTÕES
======================================== */
.rbai-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--rbai-transition);
    position: relative;
    overflow: hidden;
}

.rbai-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--rbai-transition);
}

.rbai-btn:hover::before {
    left: 100%;
}

.rbai-btn-primary {
    background: var(--rbai-gradient);
    color: var(--rbai-white);
    box-shadow: var(--rbai-shadow);
}

.rbai-btn-primary:hover {
    background: var(--rbai-gradient-hover);
    transform: translateY(-2px);
    box-shadow: var(--rbai-shadow-lg);
}

.rbai-btn-outline {
    background: transparent;
    color: var(--rbai-primary);
    border: 2px solid var(--rbai-primary);
}

.rbai-btn-outline:hover {
    background: var(--rbai-primary);
    color: var(--rbai-white);
    transform: translateY(-2px);
}

.rbai-btn-google {
    background: var(--rbai-white);
    color: var(--rbai-dark);
    border: 1px solid #e2e8f0;
    box-shadow: var(--rbai-shadow-sm);
}

.rbai-btn-google:hover {
    box-shadow: var(--rbai-shadow);
    transform: translateY(-1px);
}

.rbai-btn-google::before {
    content: '';
    width: 20px;
    height: 20px;
    background: url('data:image/svg+xml,...') no-repeat center;
    margin-right: 0.5rem;
}

/* ========================================
   FEED DE MDS - ESTILO CHARACTER.AI
======================================== */
.rbai-hero {
    background: var(--rbai-gradient);
    color: var(--rbai-white);
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.rbai-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,...') repeat;
    opacity: 0.1;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.rbai-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: rgba(255,255,255,0.95);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rbai-hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.rbai-search-bar {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.rbai-search-input {
    width: 100%;
    padding: 1rem 1.5rem 1rem 3rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--rbai-shadow-lg);
}

.rbai-search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--rbai-gray);
    font-size: 1.2rem;
}

.rbai-categories-nav {
    padding: 2rem 0;
    background: var(--rbai-white);
}

.rbai-categories-list {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.rbai-category-item {
    position: relative;
}

.rbai-category-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--rbai-bg);
    color: var(--rbai-gray);
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: var(--rbai-transition);
    border: 2px solid transparent;
}

.rbai-category-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--rbai-shadow);
}

.rbai-category-link.active {
    background: var(--rbai-primary);
    color: var(--rbai-white);
    box-shadow: var(--rbai-shadow-lg);
}

/* Cores específicas por categoria */
.rbai-category-relacionamento:hover { 
    background: var(--categoria-relacionamento); 
    color: var(--rbai-white); 
}
.rbai-category-motivacional:hover { 
    background: var(--categoria-motivacional); 
    color: var(--rbai-white); 
}
.rbai-category-personagens:hover { 
    background: var(--categoria-personagens); 
    color: var(--rbai-white); 
}
.rbai-category-espiritualidade:hover { 
    background: var(--categoria-espiritualidade); 
    color: var(--rbai-white); 
}

.rbai-category-icon {
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

/* ========================================
   GRID DE MDS
======================================== */
.rbai-mds-section {
    padding: 3rem 0;
    background: var(--rbai-bg);
}

.rbai-mds-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.rbai-md-card {
    background: var(--rbai-white);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--rbai-shadow);
    transition: var(--rbai-transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
}

.rbai-md-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--rbai-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--rbai-transition);
}

.rbai-md-card:hover::before {
    transform: scaleX(1);
}

.rbai-md-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--rbai-shadow-xl);
    border-color: var(--rbai-primary);
}

.rbai-md-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: block;
    object-fit: cover;
    border: 3px solid transparent;
    background: var(--rbai-gradient);
    padding: 3px;
}

.rbai-md-name {
    font-size: 1.3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--rbai-dark);
}

.rbai-md-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--rbai-primary);
    color: var(--rbai-white);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.rbai-md-description {
    color: var(--rbai-gray);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.rbai-md-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #e2e8f0;
    font-size: 0.9rem;
    color: var(--rbai-gray);
}

.rbai-md-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.rbai-star {
    color: #fbbf24;
}

.rbai-md-users {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* ========================================
   PÁGINA SINGLE DA MD
======================================== */
.rbai-md-single {
    padding: 3rem 0;
}

.rbai-md-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--rbai-white);
    border-radius: 20px;
    box-shadow: var(--rbai-shadow);
}

.rbai-md-hero-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    display: block;
    object-fit: cover;
    border: 4px solid transparent;
    background: var(--rbai-gradient);
    padding: 4px;
}

.rbai-md-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--rbai-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rbai-md-subtitle {
    font-size: 1.2rem;
    color: var(--rbai-gray);
    margin-bottom: 2rem;
}

.rbai-cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   USER DASHBOARD
======================================== */
.rbai-dashboard {
    padding: 2rem 0;
}

.rbai-dashboard-header {
    background: var(--rbai-white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--rbai-shadow);
    margin-bottom: 2rem;
    text-align: center;
}

.rbai-user-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: block;
    object-fit: cover;
}

.rbai-subscription-status {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    font-weight: 600;
    margin-top: 1rem;
}

.rbai-subscription-active {
    background: #dcfce7;
    color: #166534;
}

.rbai-subscription-inactive {
    background: #fecaca;
    color: #991b1b;
}

.rbai-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.rbai-dashboard-card {
    background: var(--rbai-white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--rbai-shadow);
}

.rbai-dashboard-card h3 {
    color: var(--rbai-dark);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 700;
}

/* ========================================
   CONVERSAS RECENTES
======================================== */
.rbai-conversations {
    list-style: none;
    padding: 0;
    margin: 0;
}

.rbai-conversation-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #e2e8f0;
    transition: var(--rbai-transition);
    cursor: pointer;
}

.rbai-conversation-item:hover {
    background: var(--rbai-bg);
}

.rbai-conversation-item:last-child {
    border-bottom: none;
}

.rbai-conversation-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 1rem;
    object-fit: cover;
}

.rbai-conversation-info {
    flex: 1;
}

.rbai-conversation-name {
    font-weight: 600;
    color: var(--rbai-dark);
    margin-bottom: 0.25rem;
}

.rbai-conversation-last {
    color: var(--rbai-gray);
    font-size: 0.9rem;
}

.rbai-conversation-time {
    color: var(--rbai-gray-light);
    font-size: 0.8rem;
}

/* ========================================
   MODAIS E OVERLAYS
======================================== */
.rbai-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--rbai-transition);
}

.rbai-modal.active {
    opacity: 1;
    visibility: visible;
}

.rbai-modal-content {
    background: var(--rbai-white);
    border-radius: 20px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--rbai-shadow-xl);
    transform: scale(0.9);
    transition: var(--rbai-transition);
}

.rbai-modal.active .rbai-modal-content {
    transform: scale(1);
}

.rbai-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e2e8f0;
}

.rbai-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--rbai-gray);
    transition: var(--rbai-transition);
}

.rbai-modal-close:hover {
    color: var(--rbai-dark);
    transform: scale(1.1);
}

/* ========================================
   LOADING E ANIMAÇÕES
======================================== */
.rbai-loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #e2e8f0;
    border-radius: 50%;
    border-top-color: var(--rbai-primary);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.rbai-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .5; }
}

.rbai-fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

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

/* ========================================
   TOAST NOTIFICATIONS
======================================== */
.rbai-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--rbai-white);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    box-shadow: var(--rbai-shadow-xl);
    z-index: 1001;
    transform: translateX(100%);
    transition: var(--rbai-transition);
    border-left: 4px solid var(--rbai-primary);
}

.rbai-toast.show {
    transform: translateX(0);
}

.rbai-toast-success {
    border-left-color: #10b981;
}

.rbai-toast-error {
    border-left-color: #ef4444;
}

.rbai-toast-warning {
    border-left-color: #f59e0b;
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 768px) {
    .rbai-hero h1 {
        font-size: 2rem;
    }
    
    .rbai-nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .rbai-nav-links {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .rbai-categories-list {
        flex-direction: column;
        align-items: center;
    }
    
    .rbai-mds-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .rbai-cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .rbai-dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .rbai-conversation-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .rbai-container {
        padding: 0 0.5rem;
    }
    
    .rbai-hero {
        padding: 2rem 0;
    }
    
    .rbai-md-card {
        padding: 1rem;
    }
    
    .rbai-modal-content {
        padding: 1rem;
        width: 95%;
    }
}

/* ========================================
   UTILIDADES
======================================== */
.rbai-text-center { text-align: center; }
.rbai-text-left { text-align: left; }
.rbai-text-right { text-align: right; }

.rbai-mb-1 { margin-bottom: 0.25rem; }
.rbai-mb-2 { margin-bottom: 0.5rem; }
.rbai-mb-3 { margin-bottom: 0.75rem; }
.rbai-mb-4 { margin-bottom: 1rem; }
.rbai-mb-5 { margin-bottom: 1.25rem; }
.rbai-mb-6 { margin-bottom: 1.5rem; }

.rbai-mt-1 { margin-top: 0.25rem; }
.rbai-mt-2 { margin-top: 0.5rem; }
.rbai-mt-3 { margin-top: 0.75rem; }
.rbai-mt-4 { margin-top: 1rem; }
.rbai-mt-5 { margin-top: 1.25rem; }
.rbai-mt-6 { margin-top: 1.5rem; }

.rbai-p-1 { padding: 0.25rem; }
.rbai-p-2 { padding: 0.5rem; }
.rbai-p-3 { padding: 0.75rem; }
.rbai-p-4 { padding: 1rem; }
.rbai-p-5 { padding: 1.25rem; }
.rbai-p-6 { padding: 1.5rem; }

.rbai-hidden { display: none !important; }
.rbai-visible { display: block !important; }

.rbai-gradient-text {
    background: var(--rbai-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   DARK MODE (Futuro)
======================================== */
@media (prefers-color-scheme: dark) {
    /* Implementar se necessário */
}