/* ==========================================
   🎨 VARIABLES CERTUAP UNIFICADAS
   ========================================== */
:root {
    /* 🎨 COLORES CERTUAP OFICIALES */
    --color-primary: #0E2954;
    --color-secondary: #1A5F7A;
    --color-accent: #57C5B6;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-orange: #ff6b35;
    --navbar-dark: #151a22;
    --navbar-secondary: #2c3e50;
    
    /* 🌈 GRADIENTES CERTUAP */
    --gradient-primary: linear-gradient(135deg, #0E2954 0%, #1A5F7A 100%);
    --gradient-secondary: linear-gradient(135deg, #1A5F7A 0%, #57C5B6 100%);
    --gradient-accent: linear-gradient(135deg, #57C5B6 0%, #4db8a8 100%);
    --gradient-success: linear-gradient(135deg, #28a745 0%, #16a34a 100%);
    --gradient-warning: linear-gradient(135deg, #ffc107 0%, #fbbf24 100%);
    --gradient-orange: linear-gradient(135deg, #ff6b35 0%, #ff8a65 100%);
    --gradient-soft: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    --gradient-orange-soft: linear-gradient(135deg, #fff7ed 0%, #fed7aa 100%);
    
    /* 🎭 TEMA CLARO */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-soft: #fefefe;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --text-muted: #cbd5e1;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --border-soft: #f8fafc;
    
    /* ✨ SOMBRAS ELEGANTES */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.08);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.07);
    --shadow-md: 0 6px 12px -2px rgb(0 0 0 / 0.08);
    --shadow-lg: 0 10px 20px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 40px -8px rgb(0 0 0 / 0.12);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-glow: 0 0 20px rgba(87, 197, 182, 0.15);
    --shadow-certuap: 0 10px 40px rgba(14, 41, 84, 0.12);
    
    /* 🎬 TRANSICIONES */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* 📐 ESPACIADOS */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* 📝 TIPOGRAFÍA */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    
    /* 🎨 RADIOS */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-3xl: 3rem;
    --radius-full: 9999px;
}

/* 🌙 TEMA OSCURO */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-soft: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --border-light: #475569;
    --border-soft: #374151;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 20px -4px rgb(0 0 0 / 0.4);
    --shadow-xl: 0 20px 40px -8px rgb(0 0 0 / 0.5);
    --gradient-orange-soft: linear-gradient(135deg, #451a03 0%, #92400e 100%);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   🔄 LOADER CERTUAP
   ========================================== */
.loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loader-content {
    text-align: center;
    animation: fadeInUp 0.8s var(--transition-bounce);
}

.loader-logo {
    width: 80px;
    height: 80px;
    margin-bottom: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-glow);
    animation: pulse 2s infinite;
}

.loader-text {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: var(--text-lg);
}

/* ==========================================
   🏗️ LAYOUT PRINCIPAL
   ========================================== */
.app {
    display: flex;
    height: 100vh;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* ==========================================
   📋 HEADER CERTUAP
   ========================================== */
.header {
    padding: var(--space-4) var(--space-8);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-xs);
    position: relative;
    z-index: 100;
    overflow: visible;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.credits-display {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--gradient-accent);
    color: white;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-sm);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.credits-display:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-base);
    box-shadow: var(--shadow-xs);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
    border-color: var(--color-accent);
}

/* ==========================================
   🎛️ SELECTOR DE MODELOS MEJORADO
   ========================================== */
.model-selector {
    position: relative;
    z-index: 10000;
}

.model-current {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--space-3) var(--space-4);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: all var(--transition-normal);
    min-width: 260px;
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 10001;
}

.model-current:hover {
    background: var(--bg-secondary);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
    border-color: var(--color-accent);
}

.model-current.open {
    background: var(--bg-secondary);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
    z-index: 10002;
}

.model-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--text-sm);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.model-info {
    flex: 1;
    min-width: 0;
}

.model-name {
    font-weight: 700;
    font-size: var(--text-base);
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 2px;
}

.model-description {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    line-height: 1.3;
}

.model-dropdown-icon {
    color: var(--text-tertiary);
    font-size: var(--text-sm);
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}

.model-current.open .model-dropdown-icon {
    transform: rotate(180deg);
    color: var(--color-accent);
}

/* 🔧 DROPDOWN MEJORADO */
.model-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    z-index: 99999;
    max-height: 450px;
    overflow-y: auto;
    display: none;
    animation: slideDown 0.3s var(--transition-bounce);
    min-width: 300px;
    backdrop-filter: blur(20px);
    border-color: var(--color-accent);
}

.model-dropdown.show {
    display: block !important;
}

.model-category {
    padding: var(--space-4) var(--space-5) var(--space-2);
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: var(--gradient-soft);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.model-option {
    padding: var(--space-4) var(--space-5);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.model-option::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-accent);
    transform: scaleY(0);
    transition: transform var(--transition-normal);
}

.model-option:last-child {
    border-bottom: none;
    border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
}

.model-option:hover:not(.disabled) {
    background: var(--bg-soft);
    transform: translateX(4px);
}

.model-option:hover:not(.disabled)::before {
    transform: scaleY(1);
}

.model-option.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.model-option.premium {
    position: relative;
}

.model-option.premium::after {
    content: "PRO";
    position: absolute;
    top: var(--space-3);
    right: var(--space-4);
    background: var(--gradient-warning);
    color: white;
    font-size: var(--text-xs);
    font-weight: 700;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-xs);
}

/* ==========================================
   💬 CHAT Y BIENVENIDA
   ========================================== */
.chat-container {
    flex: 1;
    overflow-y: auto;
    position: relative;
    background: var(--bg-primary);
    z-index: 1;
}

.welcome {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.welcome-content {
    text-align: center;
    max-width: 1100px;
    animation: fadeInUp 0.8s var(--transition-bounce);
}

.welcome-logo {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--space-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-glow);
    animation: pulse 3s infinite;
}

.welcome h2 {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-6);
    background: var(--gradient-orange);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* 🎓 CARACTERÍSTICAS CERTUAP */
.feature-highlights {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin: var(--space-8) 0;
    flex-wrap: wrap;
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--bg-card);
    border: 2px solid var(--border);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-sm);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature:hover::before {
    opacity: 0.1;
}

.feature:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.feature i {
    font-size: var(--text-base);
    color: var(--color-accent);
    z-index: 1;
    position: relative;
}

.feature span {
    z-index: 1;
    position: relative;
}

/* ==========================================
   💡 SUGERENCIAS CERTUAP MEJORADAS
   ========================================== */
.suggestions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3); /* Ajuste: Espacio entre sugerencias más compacto por defecto */
    margin-top: var(--space-8);
    max-width: 1200px; /* Puedes ajustar este max-width si quieres que el contenedor sea más estrecho */
    margin-left: auto;
    margin-right: auto;
    padding: 0 var(--space-4);
}

.suggestion {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg); /* Ajuste: Bordes menos redondeados */
    padding: var(--space-3); /* Ajuste: Relleno interno reducido */
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: var(--text-xs); /* Ajuste: Tamaño de fuente general más pequeño */
    font-weight: 500;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
    min-height: 100px; /* Ajuste: Altura mínima de la tarjeta reducida */
    display: flex;
    flex-direction: column;
}

/* 🧡 SUGERENCIAS DE IMÁGENES - ESTILO CERTUAP */
.suggestion[data-text*="imagen"],
.suggestion[data-text*="Imagen"],
.suggestion[data-text*="genera"],
.suggestion[data-text*="Genera"],
.suggestion[data-text*="crea"],
.suggestion[data-text*="Crea"],
.suggestion[data-text*="muestra"],
.suggestion[data-text*="Muestra"] {
    background: var(--gradient-orange-soft) !important;
    border-color: var(--color-orange) !important;
}

.suggestion[data-text*="imagen"] strong,
.suggestion[data-text*="Imagen"] strong,
.suggestion[data-text*="genera"] strong,
.suggestion[data-text*="Genera"] strong,
.suggestion[data-text*="crea"] strong,
.suggestion[data-text*="Crea"] strong,
.suggestion[data-text*="muestra"] strong,
.suggestion[data-text*="Muestra"] strong {
    color: var(--color-orange) !important;
}

/* Efectos hover */
.suggestion::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
}

.suggestion::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.suggestion:hover {
    background: var(--bg-soft);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.suggestion:hover::before {
    transform: scaleX(1);
}

.suggestion:hover::after {
    opacity: 0.05;
}

.suggestion strong {
    color: var(--color-accent);
    font-weight: 700;
    font-size: var(--text-xs); /* Ajuste: Tamaño de fuente del título más pequeño */
    display: block;
    margin-bottom: var(--space-1); /* Ajuste: Espacio reducido entre título y descripción */
    position: relative;
    z-index: 1;
}

.suggestion span {
    color: var(--text-secondary);
    font-size: 0.7rem; /* Ajuste: Tamaño de fuente de la descripción más pequeño */
    line-height: 1.3; /* Ajuste: Altura de línea para texto más denso */
    position: relative;
    z-index: 1;
    flex: 1;
}

/* 🖥️ Desktop Grande (1400px+) */
@media (min-width: 1400px) {
    .suggestions {
        grid-template-columns: repeat(4, 1fr);
        max-width: 1400px;
        gap: var(--space-4); /* Mantener un buen espacio en pantallas grandes */
    }
}

/* 💻 Desktop (1200px - 1399px) */
@media (max-width: 1399px) and (min-width: 1200px) {
    .suggestions {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1200px;
        gap: var(--space-3); /* Un poco más pequeño que en 1400px+ */
    }
}

/* 📟 Laptop (900px - 1199px) */
@media (max-width: 1199px) and (min-width: 900px) {
    .suggestions {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1000px;
        gap: var(--space-3);
    }
}

/* 📱 Tablet (600px - 899px) */
@media (max-width: 899px) and (min-width: 600px) {
    .suggestions {
        grid-template-columns: repeat(2, 1fr); /* 2 columnas en tablets */
        gap: var(--space-3);
        max-width: 800px;
    }
    .suggestion {
        padding: var(--space-3); /* Un poco más de padding que en móvil */
        min-height: 110px; /* Ligeramente más altas que en móvil */
    }
    .suggestion strong {
        font-size: var(--text-sm); /* Títulos un poco más grandes en tablet */
    }
    .suggestion span {
        font-size: var(--text-xs); /* Descripción un poco más grande en tablet */
    }
}

/* 📱 Móvil (320px - 599px) */
@media (max-width: 599px) {
    .suggestions {
        grid-template-columns: repeat(2, 1fr) !important; /* Fuerza 2 columnas */
        gap: var(--space-2) !important; /* Espacio aún más reducido entre tarjetas */
        padding: 0 var(--space-3) !important; /* Relleno lateral del contenedor */
        margin-top: var(--space-6) !important; /* Margen superior ajustado */
    }
    
    .suggestion {
        padding: var(--space-2) !important; /* Relleno interno muy reducido */
        font-size: var(--text-xs) !important; /* Tamaño de fuente base más pequeño */
        min-height: 85px !important; /* Ajuste: Altura mínima reducida al máximo para compactar */
        border-radius: var(--radius) !important; /* Bordes aún menos redondeados para un look más compacto */
    }
    
    .suggestion strong {
        font-size: var(--text-xs) !important; /* Título pequeño */
        margin-bottom: var(--space-1) !important; /* Espacio mínimo */
    }
    
    .suggestion span {
        font-size: 0.65rem !important; /* Ajuste: Descripción muy pequeña */
        line-height: 1.2 !important; /* Ajuste: Altura de línea muy ajustada */
    }
}

/* ==========================================
   💬 MENSAJES
   ========================================== */
.messages {
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.message {
    display: flex;
    gap: var(--space-4);
    animation: slideInRight 0.4s var(--transition-bounce);
    max-width: 100%;
    overflow: hidden;
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.message-content {
    background: var(--bg-card);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    line-height: 1.6;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border);
    position: relative;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: calc(100% - 60px);
}

.message.user .message-content {
    background: var(--gradient-accent);
    color: white;
    border-color: var(--color-accent);
}

/* ==========================================
   🔄 TYPING INDICATOR CERTUAP
   ========================================== */
.typing {
    display: flex;
    gap: var(--space-3);
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    padding: 0 var(--space-8);
    animation: fadeInUp 0.3s ease;
    overflow: hidden;
}

.typing-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.typing-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.typing-bubble {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--bg-card);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border);
    min-width: 140px;
    max-width: calc(100% - 50px);
    overflow: hidden;
}

.typing-text {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-weight: 500;
    transition: opacity 0.15s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.typing-dots {
    display: flex;
    gap: var(--space-1);
    align-items: center;
    flex-shrink: 0;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: typingPulse 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

/* ==========================================
   ⌨️ INPUT SECTION CERTUAP
   ========================================== */
.input-section {
    padding: var(--space-6) var(--space-8);
    border-top: 1px solid var(--border);
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    z-index: 50;
}

.no-credits {
    text-align: center;
    padding: var(--space-8);
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    border: 2px solid var(--border);
    max-width: 600px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.no-credits h3 {
    color: var(--color-primary);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.no-credits p {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.6;
}

.no-credits-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.no-credits-actions .btn-primary {
    background: var(--gradient-accent);
    color: white;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.no-credits-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

.no-credits-actions .btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    border: 2px solid var(--border);
}

.no-credits-actions .btn-secondary:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.chat-form {
    max-width: 900px;
    margin: 0 auto;
}

.input-container {
    position: relative;
    display: flex;
    align-items: flex-end;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--space-3);
    gap: var(--space-3);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.input-container:focus-within {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(87, 197, 182, 0.1);
    background: var(--bg-card);
}

.btn-image {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: var(--text-lg);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.btn-image:hover {
    color: var(--color-accent);
    background: var(--bg-tertiary);
    transform: scale(1.1);
}

.chat-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: var(--text-base);
    line-height: 1.5;
    resize: none;
    min-height: 24px;
    max-height: 120px;
    font-family: inherit;
    font-weight: 500;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.chat-input::placeholder {
    color: var(--text-tertiary);
    font-weight: 400;
}

.btn-send {
    background: var(--gradient-accent);
    border: none;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    font-size: var(--text-base);
    flex-shrink: 0;
}

.btn-send:hover:not(:disabled) {
    background: var(--gradient-orange);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.btn-send:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    opacity: 0.5;
}

/* ==========================================
   🖼️ IMÁGENES EN CHAT
   ========================================== */
.message-image-section {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    max-width: 100%;
    overflow: hidden;
}

.message-image-section:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--color-accent);
}

.image-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-tertiary);
    margin-bottom: var(--space-3);
}

.message-image {
    width: 100%;
    height: auto;
    min-height: 200px;
    max-height: 400px;
    object-fit: cover;
    cursor: pointer;
    transition: all var(--transition-normal);
    border-radius: var(--radius-lg);
}

.message-image:hover {
    transform: scale(1.02);
}

.image-info {
    margin-bottom: var(--space-3);
}

.image-type {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-1);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.image-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.image-action-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    font-size: var(--text-xs);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.image-action-btn:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-1px);
}

/* ==========================================
   🗃️ SIDEBAR BOOTSTRAP MEJORADO
   ========================================== */
.offcanvas-certuap {
    background: var(--bg-secondary) !important;
    border-right: 1px solid var(--border) !important;
    width: 320px !important;
}

.offcanvas-header {
    background: var(--bg-secondary) !important;
    border-bottom: 1px solid var(--border) !important;
    padding: var(--space-6) !important;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.logo-text h1 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.logo-text p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
}

.new-chat-btn {
    width: 100%;
    background: var(--gradient-accent) !important;
    color: white !important;
    border: none !important;
    padding: var(--space-3) var(--space-4) !important;
    border-radius: var(--radius-xl) !important;
    font-weight: 600 !important;
    font-size: var(--text-sm) !important;
    cursor: pointer;
    transition: all var(--transition-normal) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: var(--space-2) !important;
    box-shadow: var(--shadow-sm) !important;
}

.new-chat-btn:hover {
    background: var(--gradient-orange) !important;
    transform: translateY(-1px) !important;
    box-shadow: var(--shadow-md) !important;
    color: white !important;
}

.offcanvas-body {
    padding: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    height: 100% !important;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4) 0;
}

.chat-history h3 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0 var(--space-6) var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

.history-list {
    padding: 0 var(--space-4);
}

.guest-info {
    margin: 0 var(--space-2);
    padding: var(--space-4);
    background: var(--gradient-accent);
    border-radius: var(--radius-xl);
    text-align: center;
    color: white;
    box-shadow: var(--shadow-sm);
}

.guest-info p {
    margin-bottom: var(--space-3);
    font-weight: 600;
}

.login-link {
    color: white;
    text-decoration: underline;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.login-link:hover {
    color: white;
    text-decoration: none;
}

.empty-history {
    padding: var(--space-8) var(--space-6);
    text-align: center;
    color: var(--text-tertiary);
    font-style: italic;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: var(--text-sm);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.guest-actions {
    display: flex;
    gap: var(--space-2);
}

.btn-login, .btn-plans {
    padding: var(--space-2) var(--space-3) !important;
    border-radius: var(--radius-lg) !important;
    font-size: var(--text-xs) !important;
    font-weight: 600 !important;
    text-decoration: none !important;
    transition: all var(--transition-normal) !important;
}

.btn-login {
    background: var(--gradient-primary) !important;
    color: white !important;
    border: none !important;
}

.btn-login:hover {
    background: var(--gradient-secondary) !important;
    color: white !important;
}

.btn-plans {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border) !important;
}

.btn-plans:hover {
    border-color: var(--color-accent) !important;
    color: var(--text-primary) !important;
}

.user-menu-btn {
    background: none !important;
    border: none !important;
    color: var(--text-tertiary) !important;
    font-size: var(--text-lg) !important;
    cursor: pointer;
    padding: var(--space-2) !important;
    border-radius: var(--radius) !important;
    transition: all var(--transition-normal) !important;
}

.user-menu-btn:hover {
    color: var(--text-primary) !important;
    background: var(--bg-tertiary) !important;
}

/* ==========================================
   📱 MODAL CERTUAP MEJORADO
   ========================================== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-3xl);
    padding: 0;
    max-width: 450px;
    width: 90%;
    box-shadow: var(--shadow-2xl);
    position: relative;
    overflow: hidden;
    border: 2px solid var(--border);
    animation: scaleIn 0.3s var(--transition-bounce);
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-tertiary);
    font-size: var(--text-lg);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.modal-close:hover {
    color: var(--color-danger);
    background: var(--bg-card);
    border-color: var(--color-danger);
    transform: scale(1.1);
}

.modal-content h3 {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--color-primary);
    margin: 0 0 var(--space-6) 0;
    padding: var(--space-8) var(--space-6) 0;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

.modal-content h3::before {
    content: '⚙️';
    font-size: var(--text-3xl);
}

.modal-body {
    padding: 0 var(--space-6) var(--space-8);
}

.modal-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
    margin-bottom: var(--space-3);
    border: 2px solid transparent;
    background: var(--bg-secondary);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.modal-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-accent);
    transform: scaleY(0);
    transition: transform var(--transition-normal);
}

.modal-link:hover {
    background: var(--bg-soft);
    border-color: var(--color-accent);
    transform: translateX(8px);
    box-shadow: var(--shadow-sm);
    color: var(--text-primary);
}

.modal-link:hover::before {
    transform: scaleY(1);
}

.modal-link.logout {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    color: var(--color-danger);
    border-color: transparent;
}

.modal-link.logout::before {
    background: var(--color-danger);
}

.modal-link.logout:hover {
    background: var(--color-danger);
    color: white;
    border-color: var(--color-danger);
}

.modal-link i {
    font-size: var(--text-lg);
    width: 20px;
    text-align: center;
    color: var(--color-accent);
    transition: all var(--transition-normal);
}

.modal-link.logout i {
    color: var(--color-danger);
}

.modal-link:hover i {
    transform: scale(1.1);
}

.modal-link.logout:hover i {
    color: white;
}

/* ==========================================
   📱 TOAST CERTUAP
   ========================================== */
.toast-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.toast {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-4) var(--space-5);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    transform: translateX(100%);
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
}

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

.toast.success {
    border-left: 4px solid var(--color-success);
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
}

.toast.info {
    border-left: 4px solid var(--color-accent);
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
}

/* ==========================================
   🎨 ANIMACIONES CERTUAP
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% { 
        opacity: 1; 
        transform: scale(1);
    }
    50% { 
        opacity: 0.8; 
        transform: scale(1.05);
    }
}

@keyframes typingPulse {
    0%, 60%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    30% {
        transform: scale(1.2);
        opacity: 1;
    }
}

/* ==========================================
   🖥️ SCROLLBARS CERTUAP
   ========================================== */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ==========================================
   📱 RESPONSIVE CERTUAP
   ========================================== */

/* 🖥️ Desktop Grande (1400px+) */
@media (min-width: 1400px) {
    .suggestions {
        grid-template-columns: repeat(4, 1fr);
        max-width: 1400px;
        gap: var(--space-5);
    }
}

/* 💻 Desktop (1200px - 1399px) */
@media (max-width: 1399px) and (min-width: 1200px) {
    .suggestions {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1200px;
    }
}

/* 📟 Laptop (900px - 1199px) */
@media (max-width: 1199px) and (min-width: 900px) {
    .suggestions {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1000px;
        gap: var(--space-3);
    }
    
    .welcome h2 {
        font-size: var(--text-3xl);
    }
    
    .header {
        padding: var(--space-4) var(--space-6);
    }
}

/* 📱 Tablet (600px - 899px) */
@media (max-width: 899px) and (min-width: 600px) {
    .suggestions {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
        max-width: 800px;
    }
    
    .welcome h2 {
        font-size: var(--text-2xl);
    }
    
    .feature-highlights {
        gap: var(--space-4);
    }
    
    .feature {
        font-size: var(--text-xs);
        padding: var(--space-2) var(--space-4);
    }
}

/* 📱 Móvil (320px - 599px) */
@media (max-width: 599px) {
    .suggestions {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: var(--space-2) !important;
        padding: 0 var(--space-3) !important;
        margin-top: var(--space-6) !important;
    }
    
    .suggestion {
        padding: var(--space-3) !important;
        font-size: var(--text-xs) !important;
        min-height: 100px !important;
        border-radius: var(--radius-lg) !important;
    }
    
    .suggestion strong {
        font-size: var(--text-xs) !important;
        margin-bottom: var(--space-1) !important;
    }
    
    .suggestion span {
        font-size: 0.7rem !important;
        line-height: 1.3 !important;
    }
    
    .welcome h2 {
        font-size: var(--text-xl) !important;
        margin-bottom: var(--space-4) !important;
    }
    
    .welcome {
        padding: var(--space-6) !important;
    }
    
    .header {
        padding: var(--space-3) var(--space-4) !important;
    }
    
    .model-current {
        min-width: 200px !important;
        padding: var(--space-2) var(--space-3) !important;
    }
    
    .model-name {
        font-size: var(--text-sm) !important;
    }
    
    .model-description {
        font-size: 0.7rem !important;
    }
    
    .model-icon {
        width: 28px !important;
        height: 28px !important;
        font-size: var(--text-xs) !important;
    }
    
    .credits-display {
        padding: var(--space-1) var(--space-3) !important;
        font-size: var(--text-xs) !important;
    }
    
    .theme-toggle {
        width: 36px !important;
        height: 36px !important;
        font-size: var(--text-sm) !important;
    }
    
    .feature-highlights {
        gap: var(--space-2) !important;
        margin: var(--space-4) 0 !important;
    }
    
    .feature {
        font-size: 0.7rem !important;
        padding: var(--space-1) var(--space-3) !important;
    }
    
    .typing {
        padding: 0 var(--space-4) !important;
    }
    
    .typing-avatar {
        width: 28px !important;
        height: 28px !important;
    }
    
    .typing-text {
        font-size: var(--text-xs) !important;
    }
    
    .typing-bubble {
        padding: var(--space-2) var(--space-3) !important;
        min-width: 120px !important;
    }
    
    .messages {
        padding: var(--space-4) !important;
    }
    
    .message {
        gap: var(--space-3) !important;
    }
    
    .message-avatar {
        width: 32px !important;
        height: 32px !important;
    }
    
    .message-content {
        padding: var(--space-3) var(--space-4) !important;
        font-size: var(--text-sm) !important;
        max-width: calc(100% - 50px) !important;
    }
    
    .message-image {
        min-height: 200px !important;
        max-height: 300px !important;
    }
    
    .image-actions {
        flex-direction: column !important;
    }
    
    .image-action-btn {
        width: 100% !important;
        justify-content: center !important;
    }
    
    .model-dropdown {
        max-height: 300px !important;
        min-width: 220px !important;
        left: -20px !important;
        right: -20px !important;
    }
    
    .modal-content {
        width: 95% !important;
        margin: var(--space-4) !important;
    }
    
    .modal-content h3 {
        font-size: var(--text-xl) !important;
        padding: var(--space-6) var(--space-4) 0 !important;
    }
    
    .modal-body {
        padding: 0 var(--space-4) var(--space-6) !important;
    }
    
    .modal-link {
        padding: var(--space-3) var(--space-4) !important;
        font-size: var(--text-sm) !important;
    }
}

/* ==========================================
   🖥️ DESKTOP SIDEBAR
   ========================================== */
@media (min-width: 769px) {
    .offcanvas-certuap {
        position: relative !important;
        visibility: visible !important;
        background-color: var(--bg-secondary) !important;
        border-right: 1px solid var(--border) !important;
        transform: none !important;
        transition: none !important;
        width: 320px !important;
        height: 100vh !important;
        display: block !important;
    }
    
    .offcanvas-backdrop {
        display: none !important;
    }
    
    .app {
        display: flex !important;
    }
    
    .main {
        margin-left: 0 !important;
        flex: 1 !important;
    }
    
    .btn-close {
        display: none !important;
    }
    
    .offcanvas-header {
        padding-right: var(--space-6) !important;
    }
}

/* ==========================================
   📱 MÓVIL SIDEBAR Y INPUT
   ========================================== */
@media (max-width: 768px) {
    .offcanvas-certuap {
        z-index: 1060 !important;
        transform: translateX(-100%) !important;
    }
    
    .offcanvas-certuap.show {
        transform: translateX(0) !important;
    }
    
    .offcanvas-backdrop {
        z-index: 1055 !important;
    }
    
    .input-section {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        z-index: 1040 !important;
        background: var(--bg-card) !important;
        border-top: 2px solid var(--border) !important;
        padding: var(--space-4) !important;
        margin: 0 !important;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1) !important;
        backdrop-filter: blur(20px) !important;
    }
    
    .chat-container {
        padding-bottom: 120px !important;
    }
    
    .input-container {
        max-width: 100% !important;
        margin: 0 !important;
    }
    
    .chat-form {
        width: 100% !important;
        max-width: 100% !important;
    }
    
    body.offcanvas-open .input-section {
        opacity: 0.3 !important;
        pointer-events: none !important;
    }
}

/* ==========================================
   ♿ ACCESIBILIDAD CERTUAP
   ========================================== */
.suggestion:focus,
.btn-send:focus,
.model-current:focus,
.theme-toggle:focus,
.modal-link:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* ==========================================
   🔧 FIXES ESPECÍFICOS
   ========================================== */
.chat-container {
    overflow-x: hidden;
    overflow-y: auto;
}

.welcome-content {
    overflow-x: hidden;
}

.suggestions {
    overflow: visible;
}

body {
    overflow-x: hidden;
}