style.css

/* Reset y variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colores base mejorados */
    --bg-primary: radial-gradient(ellipse at center, #0f0f23 0%, #000000 70%);
    --bg-secondary: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    --bg-tertiary: linear-gradient(135deg, #1a1a1a 0%, #2a2a3a 100%);
    --bg-glass: rgba(26, 26, 26, 0.7);
    --bg-glass-hover: rgba(59, 130, 246, 0.1);

    /* Texto */
    --text-primary: #ffffff;
    --text-secondary: #b4b4b4;
    --text-muted: #6b7280;

    /* Acentos mejorados */
    --accent: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
    --accent-solid: #3b82f6;
    --accent-hover: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #0891b2 100%);
    --accent-light: rgba(59, 130, 246, 0.1);

    /* Estados */
    --success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --error: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

    /* Bordes */
    --border: rgba(255, 255, 255, 0.1);
    --border-bright: rgba(59, 130, 246, 0.3);

    /* Sombras mejoradas */
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
    --shadow-glow-error: 0 0 20px rgba(239, 68, 68, 0.3);

    /* Bordes redondeados */
    --border-radius: 16px;
    --border-radius-sm: 12px;
    --border-radius-lg: 24px;

    /* Transiciones mejoradas */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Tema claro basado en las preferencias del sistema */
@media (prefers-color-scheme: light) {
    :root {
        /* Fondos para tema claro */
        --bg-primary: radial-gradient(ellipse at center, #f8fafc 0%, #ffffff 100%);
        --bg-secondary: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
        --bg-tertiary: linear-gradient(135deg, #e2e8f0 0%, #f8fafc 100%);
        --bg-glass: rgba(255, 255, 255, 0.85);
        --bg-glass-hover: rgba(59, 130, 246, 0.07);

        /* Texto para tema claro */
        --text-primary: #1e293b;
        --text-secondary: #475569;
        --text-muted: #64748b;

        /* Acentos ajustados para tema claro */
        --accent: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
        --accent-solid: #3b82f6;
        --accent-hover: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #0891b2 100%);
        --accent-light: rgba(59, 130, 246, 0.08);

        /* Estados para tema claro */
        --success: linear-gradient(135deg, #10b981 0%, #059669 100%);
        --error: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
        --warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

        /* Bordes para tema claro */
        --border: rgba(148, 163, 184, 0.25);
        --border-bright: rgba(59, 130, 246, 0.25);

        /* Sombras más suaves para tema claro */
        --shadow: 0 4px 20px rgba(148, 163, 184, 0.18);
        --shadow-lg: 0 20px 40px rgba(148, 163, 184, 0.22);
        --shadow-xl: 0 25px 50px rgba(148, 163, 184, 0.28);
        --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.18);
        --shadow-glow-error: 0 0 20px rgba(239, 68, 68, 0.18);
    }

    /* Efectos de fondo ajustados para tema claro */
    body::before {
        background:
            radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.03) 0%, transparent 50%),
            radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.03) 0%, transparent 50%),
            radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.02) 0%, transparent 50%);
    }

    /* Ajustes específicos para elementos con fondos especiales en tema claro */
    .message-text code {
        background: rgba(148, 163, 184, 0.13);
        color: #334155;
    }

    .message-text pre {
        background: rgba(148, 163, 184, 0.13);
        color: #334155;
    }

    .message-text blockquote {
        border-left: 4px solid #cbd5e1;
        color: #64748b;
        background: rgba(148, 163, 184, 0.08);
    }

    .message-text hr {
        border-top: 1px solid #cbd5e1;
    }

    .suggestion-btn {
        background: var(--bg-glass);
        color: var(--text-secondary);
        border: 1px solid var(--border);
    }

    .suggestion-btn:hover {
        background: var(--accent-light);
        color: var(--accent-solid);
        border-color: var(--accent-solid);
    }

    .preview-btn {
        background: var(--accent-light);
        color: var(--accent-solid);
        border: 1px solid var(--accent-solid);
    }

    .preview-btn:hover {
        background: var(--accent-hover);
        color: #fff;
    }

    .btn-primary {
        background: var(--accent);
        color: #fff;
        border: none;
    }

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

    .btn-secondary {
        background: var(--bg-glass);
        color: var(--text-secondary);
        border: 1px solid var(--border);
    }

    .btn-secondary:hover {
        background: var(--accent-light);
        color: var(--accent-solid);
        border-color: var(--accent-solid);
    }
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    position: relative;
}

/* Efectos de fondo animado */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 60px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.menu-btn {
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--border-radius-sm);
    width: 48px;
    height: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow);
    min-width: 44px;
    min-height: 44px;
}

.menu-btn:hover {
    background: var(--border);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
    animation: shakeEpic 0.3s ease-in-out;
}

.menu-btn:active {
    transform: scale(0.95);
    animation: none;
}

.menu-btn span {
    width: 18px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: var(--transition-fast);
    position: relative;
}

.menu-btn span::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    border-radius: inherit;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.menu-btn:hover span::before {
    transform: scaleX(1.5);
    opacity: 0.7;
}

.header-title h1 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-title p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: none;
}

.new-chat-btn {
    background: var(--accent);
    border: none;
    border-radius: 8px;
    width: 48px;
    height: 48px;
    color: white;
    font-size: 1.5rem;
    font-weight: 300;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    min-width: 44px;
    min-height: 44px;
}

.new-chat-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.new-chat-btn:hover::before {
    width: 300px;
    height: 300px;
}

.new-chat-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.6);
    animation: pulseEpic 1s infinite;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    z-index: 200;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.sidebar.open {
    transform: translateX(0);
    animation: slideInEpic 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 60px;
    position: relative;
    overflow: hidden;
    gap: 0.5rem;
}

.sidebar-header>div:last-child {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.sidebar-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }

    100% {
        left: 100%;
    }
}

.sidebar-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.3rem;
    cursor: pointer;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: var(--transition);
    min-width: 38px;
    min-height: 38px;
    flex-shrink: 0;
}

.close-btn:hover {
    background: var(--border);
    transform: scale(1.05);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.3);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.no-chats {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
}

.no-chats small {
    font-size: 0.875rem;
    opacity: 0.7;
}

.chat-item {
    background: var(--bg-tertiary);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    transform: translateX(0);
}

.chat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.2), transparent);
    transition: left 0.5s ease;
}

.chat-item:hover::before {
    left: 100%;
}

.chat-item:hover {
    border-color: var(--accent);
    background: var(--border);
    transform: translateX(10px) scale(1.02);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
    animation: glowEpic 2s infinite;
}

.chat-item:active {
    transform: translateX(5px) scale(0.98);
    transition: transform 0.1s ease;
}

.chat-item.active {
    border-color: var(--accent);
    background: var(--bg-tertiary);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

.chat-item-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.chat-item-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.chat-item-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.chat-item-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: none;
    gap: 0.25rem;
}

.chat-item:hover .chat-item-actions {
    display: flex;
}

.chat-action-btn {
    background: var(--bg-secondary);
    border: none;
    border-radius: 6px;
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    min-width: 32px;
    min-height: 32px;
}

.chat-action-btn:hover {
    background: var(--border);
    color: var(--text-primary);
}

.chat-action-btn svg {
    width: 12px;
    height: 12px;
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Main Chat */
.main {
    margin-top: 60px;
    height: calc(100vh - 60px);
    display: flex;
    flex-direction: column;
    position: relative;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    scroll-behavior: smooth;
    scroll-padding: 1rem;
}

.messages::-webkit-scrollbar {
    display: none;
}

.messages {
    scrollbar-width: none;
}

.welcome-message {
    text-align: center;
    max-width: 300px;
    margin: 2rem auto;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
    animation: fadeInEpic 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) 0.5s both;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.welcome-message::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    animation: rotate 4s linear infinite;
    opacity: 0.7;
}

.welcome-message::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(59, 130, 246, 0.05), transparent);
    animation: shimmer 3s ease-in-out infinite;
}

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

    100% {
        transform: rotate(360deg);
    }
}

.welcome-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    animation: bounceEpic 3s infinite 1s;
    display: inline-block;
}

.welcome-message h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    animation: fadeInEpic 0.8s ease-out 1.2s both;
    position: relative;
    z-index: 1;
}

.welcome-message p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    animation: fadeInEpic 0.8s ease-out 1.4s both;
    position: relative;
    z-index: 1;
}

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

.message.user {
    justify-content: flex-end;
}

.message.ai {
    justify-content: flex-start;
}

.message-content {
    max-width: 85%;
    padding: 0.875rem 1.125rem;
    border-radius: var(--border-radius);
    position: relative;
    box-shadow: var(--shadow);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message.user .message-content {
    background: var(--accent);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.ai .message-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}

.message-text {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.message-text a {
    color: #4285f4;
    text-decoration: underline;
    transition: color 0.2s ease;
}

.message-text a:hover {
    color: #3367d6;
    text-decoration: none;
}

/* Estilos adicionales para Markdown */
.message-text h1,
.message-text h2,
.message-text h3,
.message-text h4,
.message-text h5,
.message-text h6 {
    margin: 1rem 0 0.5rem 0;
    font-weight: bold;
}

.message-text h1 {
    font-size: 1.5rem;
}

.message-text h2 {
    font-size: 1.3rem;
}

.message-text h3 {
    font-size: 1.1rem;
}

.message-text code {
    background: rgba(0, 0, 0, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
}

.message-text pre {
    background: rgba(0, 0, 0, 0.1);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.5rem 0;
}

.message-text pre code {
    background: none;
    padding: 0;
}

.message-text blockquote {
    border-left: 4px solid #ddd;
    margin: 0.5rem 0;
    padding-left: 1rem;
    color: #666;
    font-style: italic;
}

.message-text ul,
.message-text ol {
    margin: 0.5rem 0;
    padding-left: 2rem;
}

.message-text li {
    margin: 0.2rem 0;
}

.message-text hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 1rem 0;
}

.message-text img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 0.5rem 0;
}

.message-text del {
    text-decoration: line-through;
    opacity: 0.7;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.7;
}

.message-preview {
    margin-top: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.preview-thumbnail {
    height: 80px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    position: relative;
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.preview-placeholder-icon {
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 4px;
}

.preview-placeholder-text {
    font-size: 0.75rem;
    font-weight: 500;
}

.preview-lines {
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.preview-line {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
}

.preview-line:nth-child(1) {
    width: 75%;
}

.preview-line:nth-child(2) {
    width: 50%;
}

.preview-line:nth-child(3) {
    width: 65%;
}

.preview-btn {
    width: 100%;
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.preview-btn:hover {
    background: var(--accent-hover);
}

/* Input Area */
.input-area {
    border-top: 1px solid var(--border);
    padding: 0.875rem 1rem;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.input-container {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

#messageInput {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    color: var(--text-primary);
    font-size: 1rem;
    resize: none;
    min-height: 52px;
    max-height: 140px;
    font-family: inherit;
    transition: var(--transition-fast);
    line-height: 1.5;
    touch-action: manipulation;
}

#messageInput:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    background: var(--bg-secondary);
}

#messageInput::placeholder {
    color: var(--text-secondary);
}

#sendBtn {
    background: var(--accent);
    border: none;
    border-radius: var(--border-radius);
    width: 48px;
    height: 48px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

#sendBtn:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

#sendBtn:disabled {
    background: var(--border);
    cursor: not-allowed;
    opacity: 0.5;
}

#sendBtn svg {
    width: 18px;
    height: 18px;
}

.suggestions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.suggestion-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Preview Modal */
.preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    z-index: 1000;
    display: none;
    flex-direction: column;
}

.preview-modal.show {
    display: flex;
}

.preview-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 60px;
}

.back-btn {
    background: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    width: 48px;
    height: 48px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    min-width: 44px;
    min-height: 44px;
}

.back-btn:hover {
    background: var(--border);
}

.back-btn svg {
    width: 18px;
    height: 18px;
}

.preview-title h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.preview-title p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.preview-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    width: 48px;
    height: 48px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    min-width: 44px;
    min-height: 44px;
}

.action-btn:hover {
    background: var(--border);
}

.action-btn svg {
    width: 18px;
    height: 18px;
}

.preview-content {
    flex: 1;
    overflow: hidden;
}

#previewFrame {
    width: 100%;
    height: 100%;
    border: none;
}

/* Loading Mejorado */
.loading {
    position: fixed;
    bottom: 100px;
    left: 1rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(59, 130, 246, 0.1) 100%);
    border: 1px solid var(--accent);
    border-radius: 12px;
    padding: 1.2rem;
    display: none;
    z-index: 50;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    min-width: 180px;
    animation: loadingPulse 2s ease-in-out infinite;
}

.loading.show {
    display: block;
    animation: fadeInUp 0.4s ease-out, loadingPulse 2s ease-in-out infinite 0.4s;
}

.loading-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    align-items: center;
}

.typing-indicator span {
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    animation: typingDots 1.6s infinite;
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
}

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

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

.loading-text {
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.9;
    animation: textFade 2s ease-in-out infinite;
}

@keyframes typingDots {

    0%,
    80%,
    100% {
        opacity: 0.3;
        transform: scale(0.8);
    }

    40% {
        opacity: 1;
        transform: scale(1.2);
    }
}

@keyframes loadingPulse {

    0%,
    100% {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    }

    50% {
        box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
    }
}

@keyframes textFade {

    0%,
    100% {
        opacity: 0.7;
    }

    50% {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Edit Input */
.edit-input {
    background: var(--bg-tertiary);
    border: 1px solid var(--accent);
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    width: 100%;
    font-family: inherit;
}

.edit-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

/* User Info Button */
.user-info-btn {
    background: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    width: 38px;
    height: 38px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1rem;
    padding: 0;
    opacity: 0.7;
    min-width: 38px;
    min-height: 38px;
    flex-shrink: 0;
}

.user-info-btn:hover {
    background: var(--border);
    color: var(--text-primary);
    opacity: 1;
    transform: scale(1.05);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.3);
}

.user-info-emoji {
    font-size: 1rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.85;
}

/* Contenedores de herramientas DevCenter */
#aiConfigBtnContainer,
#devCenterToolsContainer {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

/* Modal de datos de usuario - DISEÑO COMPLETAMENTE MEJORADO */
.user-info-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    overflow-y: auto;
}

.user-info-modal-content {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(20, 20, 30, 0.95) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 0;
    min-width: 320px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
        0 8px 32px rgba(124, 58, 237, 0.2);
    color: var(--text-primary);
    overflow: hidden;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Header del modal */
.modal-header {
    background: linear-gradient(135deg, var(--accent) 0%, #8b5cf6 100%);
    padding: 1.5rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.modal-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 50%);
    pointer-events: none;
}

.modal-header h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.modal-subtitle {
    margin: 0;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

/* Contenido del formulario */
.user-info-modal-content form {
    padding: 2rem;
    max-height: calc(90vh - 120px);
    overflow-y: auto;
}

/* Secciones de configuración */
.settings-section {
    margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.settings-section:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(124, 58, 237, 0.3);
    transform: translateY(-1px);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.section-icon {
    font-size: 1.25rem;
    opacity: 0.9;
}

.section-header h4 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Grids de inputs */
.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.ai-settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group.full-width {
    grid-column: 1 / -1;
}

/* Labels mejorados */
.input-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.label-icon {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Inputs y selects mejorados */
.user-info-modal-content input,
.user-info-modal-content select,
.user-info-modal-content textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    padding: 0.75rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.user-info-modal-content input:focus,
.user-info-modal-content select:focus,
.user-info-modal-content textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(124, 58, 237, 0.1);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
    transform: translateY(-1px);
}

.user-info-modal-content input:hover,
.user-info-modal-content select:hover,
.user-info-modal-content textarea:hover {
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.08);
}

.user-info-modal-content select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23a0a0a0' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1rem;
    padding-right: 2.5rem;
}

/* Theming estándar moderno para selects */
.user-info-modal-content {
    color-scheme: dark;
}

.user-info-modal-content select {
    color-scheme: dark;
    accent-color: var(--accent-solid);
}

/* Estilos para las opciones del dropdown - Compatibilidad mejorada */
.user-info-modal-content select option {
    background-color: #1a1a2e;
    color: var(--text-primary);
    padding: 0.5rem;
}

.user-info-modal-content select option:hover {
    background-color: var(--accent-solid);
    color: white;
}

.user-info-modal-content select option:checked,
.user-info-modal-content select option[selected] {
    background-color: var(--accent-solid);
    color: white;
    font-weight: 600;
}

.user-info-modal-content textarea {
    resize: vertical;
    min-height: 60px;
    max-height: 120px;
    font-family: inherit;
}

/* Placeholder styling */
.user-info-modal-content input::placeholder,
.user-info-modal-content textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
    font-style: italic;
}

/* Botones de acción */
.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary,
.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
    min-height: 48px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, #8b5cf6 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #8b5cf6 0%, var(--accent) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

/* =================== RESPONSIVE DESIGN MEJORADO =================== */

/* Tablets y pantallas medianas */
@media (max-width: 768px) {
    .user-info-modal-content {
        margin: 1rem;
        max-width: calc(100vw - 2rem);
    }

    .input-grid,
    .ai-settings-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .modal-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .user-info-modal-content form {
        padding: 1.5rem;
    }
}

/* Móviles grandes (iPhone 12 Pro Max, etc.) */
@media (max-width: 425px) {
    .modal-header {
        padding: 1rem 1.5rem;
    }

    .modal-header h3 {
        font-size: 1.25rem;
    }

    .settings-section {
        padding: 1rem;
    }

    .user-info-modal-content form {
        padding: 1rem;
    }

    .input-grid,
    .ai-settings-grid {
        gap: 1rem;
    }

    .btn-primary,
    .btn-secondary {
        padding: 1rem 1.25rem;
        font-size: 0.9rem;
        min-height: 52px;
    }
}

/* Móviles pequeños (iPhone SE, etc.) */
@media (max-width: 375px) {
    .user-info-modal {
        padding: 0.5rem;
    }

    .user-info-modal-content {
        margin: 0.5rem;
        max-width: calc(100vw - 1rem);
        max-height: 95vh;
    }

    .modal-header {
        padding: 0.75rem 1rem;
    }

    .modal-header h3 {
        font-size: 1.125rem;
    }

    .user-info-modal-content form {
        padding: 0.75rem;
    }

    .settings-section {
        padding: 0.75rem;
        margin-bottom: 1rem;
    }

    .section-header h4 {
        font-size: 1rem;
    }

    .btn-primary,
    .btn-secondary {
        padding: 0.875rem 1rem;
        font-size: 0.85rem;
        min-height: 48px;
    }
}

/* Modal de configuración de IA */
.ai-config-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.92);
    z-index: 4000;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100vw;
    height: 100vh;
}

.ai-config-modal-content {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 2.5rem 2rem 2rem 2rem;
    min-width: 350px;
    max-width: 520px;
    width: 100%;
    box-shadow: var(--shadow);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border: 2px solid var(--accent);
    position: relative;
    margin: auto;
    max-height: 90vh;
    overflow-y: auto;
}

.ai-config-modal-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    color: var(--accent);
}

#aiListContainer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.ai-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
    box-shadow: 0 2px 8px 0 rgba(59, 130, 246, 0.08);
}

.ai-item.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent);
}

.ai-limits {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    margin: 0.25rem 0;
}

.ai-limits small {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.85em;
}

.ai-description {
    background: rgba(160, 160, 160, 0.1);
    border-left: 3px solid var(--text-secondary);
    padding: 0.5rem 0.75rem;
    margin: 0.25rem 0;
    font-style: italic;
}

.ai-description small {
    color: var(--text-secondary);
    font-size: 0.9em;
    line-height: 1.4;
}

.ai-capabilities {
    margin: 0.5rem 0;
}

.ai-capabilities small {
    color: var(--text-secondary);
    font-size: 0.85em;
}

.capability-tag {
    display: inline-block;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.15rem 0.5rem;
    margin: 0.1rem 0.25rem 0.1rem 0;
    border-radius: 12px;
    font-size: 0.8em;
    font-weight: 500;
    white-space: nowrap;
}

/* Notificación de IA para usuarios DevCenter */
.ai-notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    z-index: 1000;
    font-size: 0.9rem;
    font-weight: 500;
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.3s ease;
    min-width: 200px;
    max-width: 350px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.ai-notification.show {
    transform: translateX(0);
    opacity: 1;
}

.ai-notification::before {
    content: '🤖';
    margin-right: 0.5rem;
    font-size: 1.1em;
}

.ai-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.ai-item-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.ai-item-select {
    accent-color: var(--accent);
    margin-right: 0.5rem;
}

.ai-item-remove {
    background: var(--error);
    border: none;
    color: #fff;
    border-radius: 6px;
    padding: 0.2rem 0.7rem;
    font-size: 0.9em;
    cursor: pointer;
    transition: var(--transition);
}

.ai-item-remove:hover {
    background: #b91c1c;
}

.ai-item label {
    font-size: 0.95em;
    color: var(--text-secondary);
    margin-bottom: 0.1rem;
}

.ai-item input {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.4rem 0.7rem;
    color: var(--text-primary);
    font-size: 0.97em;
    margin-bottom: 0.2rem;
    width: 100%;
}

.ai-item input:focus {
    outline: none;
    border-color: var(--accent);
}

#addAiBtn {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    padding: 0.6rem 0;
}

/* Botón Volver a Generar en mensajes de error IA */
.message .action-btn {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.95em;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    padding: 0.6em 1.2em;
    margin: 0 auto;
    display: block;
    min-width: 140px;
    max-width: 100%;
    box-sizing: border-box;
    text-align: center;
}

.message .action-btn:hover {
    background: var(--accent-hover);
}

#copyCodeBtn {
    background: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    width: 44px;
    height: 44px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

#copyCodeBtn:hover {
    background: var(--accent);
    color: #fff;
}

#copyCodeBtn svg {
    width: 18px;
    height: 18px;
}

/* Ocultar el botón en móvil */
@media (max-width: 640px) {
    #copyCodeBtn {
        display: none !important;
    }
}

/* Mostrar el botón en escritorio */
@media (min-width: 641px) {
    #copyCodeBtn {
        display: flex !important;
    }
}

/* Media query eliminada - reglas movidas a los nuevos breakpoints optimizados */

/* =================== RESPONSIVE DESIGN PRINCIPAL MEJORADO =================== */

/* Móviles muy pequeños (iPhone SE 320px-375px) */
@media (max-width: 375px) {
    .header-title p {
        display: none;
    }

    .header-title h1 {
        font-size: 1rem;
    }

    .menu-btn,
    .new-chat-btn {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }

    .message-content {
        max-width: 95%;
        padding: 0.75rem 1rem;
        font-size: 1rem;
        line-height: 1.6;
    }

    .welcome-message {
        max-width: 95%;
        margin: 1rem auto;
        padding: 1.25rem;
        font-size: 1.125rem;
        line-height: 1.7;
    }

    .sidebar {
        width: 100vw;
        max-width: 100vw;
        height: 100vh;
        height: 100dvh;
        /* Dynamic viewport height */
        top: 0;
        left: 0;
        z-index: 300;
        position: fixed;
        /* Safe area considerations for notched devices */
        padding-top: env(safe-area-inset-top, 0);
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .sidebar-content {
        height: calc(100vh - 80px - env(safe-area-inset-top, 0) - env(safe-area-inset-bottom, 0));
        height: calc(100dvh - 80px - env(safe-area-inset-top, 0) - env(safe-area-inset-bottom, 0));
        overflow-y: auto;
        padding: 1rem;
        -webkit-overflow-scrolling: touch;
    }

    .overlay {
        display: block;
        z-index: 250;
        background: rgba(0, 0, 0, 0.6);
    }

    .input-area {
        padding: 0.75rem;
    }

    .input-container {
        gap: 0.75rem;
    }

    #messageInput {
        padding: 0.875rem 1rem;
        min-height: 48px;
        font-size: 1rem;
        border-radius: 12px;
    }

    #sendBtn {
        width: 48px;
        height: 48px;
        border-radius: 12px;
    }

    #sendBtn svg {
        width: 18px;
        height: 18px;
    }
}

/* Móviles medianos (375px-425px) */
@media (min-width: 376px) and (max-width: 425px) {
    .header-title p {
        display: none;
    }

    .message-content {
        max-width: 92%;
        padding: 0.75rem 1rem;
        font-size: 1rem;
        line-height: 1.6;
    }

    .welcome-message {
        max-width: 92%;
        margin: 1.25rem auto;
        padding: 1.25rem;
        font-size: 1.125rem;
        line-height: 1.7;
    }

    .sidebar {
        width: 100vw;
        max-width: 100vw;
        height: 100vh;
        height: 100dvh;
        /* Dynamic viewport height */
        position: fixed;
        z-index: 300;
        /* Safe area considerations */
        padding-top: env(safe-area-inset-top, 0);
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .sidebar-content {
        height: calc(100vh - 80px - env(safe-area-inset-top, 0) - env(safe-area-inset-bottom, 0));
        height: calc(100dvh - 80px - env(safe-area-inset-top, 0) - env(safe-area-inset-bottom, 0));
        -webkit-overflow-scrolling: touch;
    }

    .overlay {
        display: block;
        z-index: 250;
        background: rgba(0, 0, 0, 0.6);
    }

    .input-area {
        padding: 0.75rem;
    }

    #messageInput {
        padding: 0.875rem 1rem;
        min-height: 48px;
        font-size: 1rem;
    }

    #sendBtn {
        width: 48px;
        height: 48px;
    }
}

/* Móviles grandes y tablets pequeñas (425px-768px) */
@media (min-width: 426px) and (max-width: 768px) {
    .header-title p {
        display: block;
        font-size: 0.8rem;
    }

    .message-content {
        max-width: 85%;
        padding: 0.875rem 1.125rem;
        font-size: 1rem;
        line-height: 1.6;
    }

    .welcome-message {
        max-width: 85%;
        margin: 1.5rem auto;
        padding: 1.5rem;
        font-size: 1.125rem;
        line-height: 1.7;
    }

    .sidebar {
        width: 320px;
        max-width: 320px;
        height: 100vh;
        height: 100dvh;
        /* Dynamic viewport height */
        z-index: 200;
        /* Safe area considerations */
        padding-top: env(safe-area-inset-top, 0);
    }

    .sidebar-content {
        height: calc(100vh - 80px - env(safe-area-inset-top, 0));
        height: calc(100dvh - 80px - env(safe-area-inset-top, 0));
        -webkit-overflow-scrolling: touch;
    }

    .overlay {
        display: none;
    }

    .input-area {
        padding: 0.875rem 1rem;
    }

    .input-container {
        gap: 0.75rem;
    }

    #messageInput {
        padding: 0.875rem 1.125rem;
        min-height: 48px;
        font-size: 1rem;
    }

    #sendBtn {
        width: 48px;
        height: 48px;
    }
}

/* Tablets y pantallas medianas (768px+) */
@media (min-width: 769px) {
    .header-title p {
        display: block;
        font-size: 0.9rem;
    }

    .message-content {
        max-width: 75%;
        padding: 1rem 1.25rem;
        font-size: 1rem;
    }

    .welcome-message {
        max-width: 450px;
        margin: 2rem auto;
        padding: 2rem;
        font-size: 1.125rem;
    }

    .sidebar {
        width: 320px;
        height: 100vh;
    }

    .overlay {
        display: none;
    }

    .input-area {
        padding: 1rem 1.5rem;
    }

    .messages {
        padding: 1rem 1.5rem;
    }

    .header {
        padding: 0.75rem 1.5rem;
    }

    .input-container {
        gap: 1rem;
    }

    #messageInput {
        padding: 1rem 1.25rem;
        min-height: 52px;
        font-size: 1rem;
    }

    #sendBtn {
        width: 52px;
        height: 52px;
    }
}

/* Pantallas grandes (1024px+) */
@media (min-width: 1024px) {
    .chat-container {
        max-width: 1000px;
    }

    .message-content {
        max-width: 70%;
        padding: 1rem 1.5rem;
        font-size: 1.05rem;
    }

    .welcome-message {
        max-width: 500px;
        padding: 2.5rem;
        font-size: 1.25rem;
    }

    .input-area {
        padding: 1.25rem 2rem;
    }

    .messages {
        padding: 1.25rem 2rem;
    }
}

/* Animation classes */
.fade-in {
    animation: fadeInEpic 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

.slide-in {
    animation: slideInEpic 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

.bounce {
    animation: bounceEpic 2s infinite;
}

.pulse {
    animation: pulseEpic 2s infinite;
}

.glow {
    animation: glowEpic 3s ease-in-out infinite alternate;
}

.shake {
    animation: shakeEpic 0.5s ease-in-out;
}

.flip {
    animation: flipEpic 0.6s ease-in-out forwards;
}

.elastic {
    animation: elasticEpic 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

@keyframes fadeInEpic {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
        filter: blur(10px);
    }

    50% {
        opacity: 0.5;
        transform: translateY(15px) scale(0.95);
        filter: blur(5px);
    }

    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0);
    }
}

@keyframes slideInEpic {
    0% {
        transform: translateX(-120%) rotateY(90deg);
        opacity: 0;
        filter: blur(20px);
    }

    50% {
        transform: translateX(-10%) rotateY(45deg);
        opacity: 0.7;
        filter: blur(10px);
    }

    100% {
        transform: translateX(0) rotateY(0deg);
        opacity: 1;
        filter: blur(0);
    }
}

@keyframes bounceEpic {

    0%,
    100% {
        transform: translateY(0) scale(1);
    }

    25% {
        transform: translateY(-20px) scale(1.1);
    }

    50% {
        transform: translateY(-10px) scale(1.05);
    }

    75% {
        transform: translateY(-15px) scale(1.08);
    }
}

@keyframes pulseEpic {

    0%,
    100% {
        transform: scale(1);
        box-shadow: var(--shadow);
    }

    50% {
        transform: scale(1.1);
        box-shadow: 0 0 30px rgba(59, 130, 246, 0.6);
    }
}

@keyframes glowEpic {
    0% {
        box-shadow: 0 0 5px rgba(59, 130, 246, 0.2);
    }

    100% {
        box-shadow: 0 0 30px rgba(59, 130, 246, 0.8), 0 0 60px rgba(59, 130, 246, 0.4);
    }
}

@keyframes shakeEpic {

    0%,
    100% {
        transform: translateX(0);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-5px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(5px);
    }
}

@keyframes flipEpic {
    0% {
        transform: rotateY(0deg);
        opacity: 1;
    }

    50% {
        transform: rotateY(90deg);
        opacity: 0.5;
    }

    100% {
        transform: rotateY(180deg);
        opacity: 1;
    }
}

@keyframes elasticEpic {
    0% {
        transform: scale(0) rotate(-180deg);
        opacity: 0;
    }

    50% {
        transform: scale(1.2) rotate(0deg);
        opacity: 0.8;
    }

    70% {
        transform: scale(0.9) rotate(10deg);
    }

    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

/* =================== ESTILOS ESPECÍFICOS PARA BOTONES DE ERROR =================== */

/* Botón Reenviar - Verde con efecto éxito */
.action-btn[onclick*="retryGenerateMessage"] {
    background: var(--success) !important;
    border: 1px solid rgba(16, 185, 129, 0.3) !important;
    color: white !important;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1.25rem;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.action-btn[onclick*="retryGenerateMessage"]:hover {
    box-shadow: 0 0 25px rgba(16, 185, 129, 0.5), 0 8px 25px rgba(16, 185, 129, 0.3) !important;
    transform: translateY(-3px) scale(1.05) !important;
    animation: successPulse 0.6s ease-in-out;
}


/* Efectos de brillo deslizante para botón */
.action-btn[onclick*="retryGenerateMessage"]::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: left 0.5s;
    z-index: 1;
}

.action-btn[onclick*="retryGenerateMessage"]:hover::before {
    left: 100%;
}

/* Animaciones específicas */
@keyframes successPulse {

    0%,
    100% {
        transform: translateY(-3px) scale(1.05);
        box-shadow: 0 0 25px rgba(16, 185, 129, 0.5), 0 8px 25px rgba(16, 185, 129, 0.3);
    }

    50% {
        transform: translateY(-5px) scale(1.08);
        box-shadow: 0 0 35px rgba(16, 185, 129, 0.7), 0 12px 30px rgba(16, 185, 129, 0.4);
    }
}


/* Contenedor de botones de error mejorado */
.message.ai .message-content .action-btn {
    margin: 0.25rem;
    font-size: 0.85rem;
}

/* =================== ESTILOS RESPONSIVOS PARA MÓVIL =================== */

/* Ocultar botones de sugerencias en dispositivos móviles */
@media (max-width: 768px) {
    .suggestions {
        display: none !important;
    }

    /* Hacer más grande el input de texto en móvil */
    #messageInput {
        font-size: 1rem;
        padding: 1rem 1.25rem;
        min-height: 56px;
    }

    /* Hacer más grande el botón de enviar en móvil */
    #sendBtn {
        width: 56px;
        height: 56px;
    }

    #sendBtn svg {
        width: 20px;
        height: 20px;
    }
}

/* =================== BOTONES DE ACCIÓN DE MENSAJES =================== */

.message-actions {
    display: flex;
    gap: 0.25rem;
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    justify-content: flex-end;
}

.message.ai:hover .message-actions {
    opacity: 1;
    visibility: visible;
}

.message-action-btn {
    background: none;
    border: none;
    border-radius: 8px;
    width: 36px;
    height: 36px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    opacity: 0.6;
    min-width: 36px;
    min-height: 36px;
}

.message-action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    opacity: 1;
    transform: scale(1.1);
}

.message-action-btn svg {
    width: 16px;
    height: 16px;
}

.message-action-btn.copy-btn:hover {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.message-action-btn.share-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-solid);
}

.message-action-btn.listen-btn:hover {
    background: rgba(168, 85, 247, 0.1);
    color: #a855f7;
}

.message-action-btn.regenerate-btn:hover {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

/* Animación de rotación para el botón de regenerar */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.spinning {
    animation: spin 1s linear infinite;
}

/* =================== OPTIMIZACIONES DE PERFORMANCE MÓVIL =================== */

/* Reducir animaciones para usuarios que prefieren menos movimiento */
@media (prefers-reduced-motion: reduce) {

    /* Desactivar todas las animaciones complejas */
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    /* Mantener solo transiciones esenciales para feedback */
    .menu-btn:hover,
    .new-chat-btn:hover,
    .action-btn:hover,
    button:hover {
        transition-duration: 0.1s !important;
    }

    /* Desactivar animaciones de background complejas */
    body::before {
        animation: none !important;
    }

    /* Simplificar efectos de hover */
    .chat-item:hover,
    .message-action-btn:hover {
        transform: none !important;
        animation: none !important;
    }
}

/* Móviles muy pequeños - iPhone SE y similares */
@media (max-width: 320px) {

    /* Espaciado compacto */
    .header-content {
        padding: 0 0.5rem;
    }

    .input-area {
        padding: 0.5rem;
    }

    .message-content {
        font-size: 0.95rem;
        padding: 0.5rem 0.75rem;
        max-width: 98%;
    }

    /* Viewport óptimo */
    .main {
        height: calc(100dvh - 60px);
    }

    /* Performance */
    .header,
    .input-area {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }
}

/* Móviles pequeños - iPhone 12 mini, etc. */
@media (min-width: 321px) and (max-width: 375px) {
    .message-content {
        font-size: 0.95rem;
        max-width: 95%;
    }

    .welcome-message {
        font-size: 1.05rem;
        padding: 1rem;
    }

    /* Safe areas y viewport */
    .sidebar {
        height: 100dvh;
        padding-top: env(safe-area-inset-top, 0);
    }

    .main {
        height: calc(100dvh - 60px);
    }
}

/* Móviles medianos - iPhone 12, etc. */
@media (min-width: 376px) and (max-width: 425px) {
    .message-content {
        font-size: 1rem;
        max-width: 92%;
    }

    .welcome-message {
        font-size: 1.1rem;
        padding: 1.25rem;
    }

    /* Viewport y performance */
    .main {
        height: calc(100dvh - 60px);
    }

    /* Desactivar efectos costosos */
    body::before {
        animation: none !important;
    }

    .sidebar-header::before,
    .welcome-message::before,
    .welcome-message::after {
        animation: none !important;
        display: none !important;
    }
}

/* Móviles grandes y tablets pequeñas */
@media (min-width: 426px) and (max-width: 768px) {
    .message-content {
        font-size: 1rem;
        max-width: 85%;
    }

    .welcome-message {
        font-size: 1.125rem;
        padding: 1.5rem;
    }

    /* Sidebar y viewport optimizados */
    .sidebar {
        width: 320px;
        height: 100dvh;
    }

    .main {
        height: calc(100dvh - 60px);
    }

    /* Performance */
    .header,
    .input-area {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }
}

/* Tablets medianas */
@media (min-width: 769px) and (max-width: 1024px) {
    .chat-container {
        max-width: 90%;
    }

    .message-content {
        max-width: 80%;
        font-size: 1rem;
        padding: 1rem 1.25rem;
    }

    .welcome-message {
        font-size: 1.2rem;
        max-width: 450px;
    }

    /* Viewport mejorado */
    .main {
        height: calc(100dvh - 60px);
    }
}

/* Desktop y pantallas grandes */
@media (min-width: 1025px) {
    .chat-container {
        max-width: 1200px;
    }

    .message-content {
        max-width: 75%;
        font-size: 1.05rem;
        padding: 1rem 1.5rem;
    }

    .welcome-message {
        font-size: 1.25rem;
        max-width: 500px;
        padding: 2rem;
    }

    /* Restaurar efectos avanzados solo en desktop */
    .header,
    .input-area {
        backdrop-filter: blur(10px) !important;
        -webkit-backdrop-filter: blur(10px) !important;
    }

    /* Viewport completo */
    .main {
        height: calc(100vh - 60px);
    }

    .sidebar {
        height: 100vh;
    }
}

/* Optimizaciones adicionales para móviles muy pequeños */
@media (max-width: 425px) {

    /* Desactivar todas las animaciones no esenciales */
    .chat-item:hover,
    .menu-btn:hover,
    .user-info-btn:hover {
        animation: none;
        transform: none;
    }

    /* Solo mantener transiciones de color para feedback */
    .menu-btn:hover,
    .new-chat-btn:hover,
    .action-btn:hover {
        transition: background-color 0.2s ease, color 0.2s ease;
        transform: none;
        animation: none;
        box-shadow: var(--shadow);
    }

    /* Remover efectos de glow costosos */
    .new-chat-btn:hover {
        box-shadow: var(--shadow);
    }
}

/* =================== MODAL DE AVISO =================== */
.aviso-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5000;
    display: none;
}

.aviso-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.aviso-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    min-width: 320px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    animation: avisoSlideIn 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.aviso-header {
    background: var(--accent);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.aviso-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 50%);
    pointer-events: none;
}

.aviso-header h2 {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

.aviso-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    font-weight: 300;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.aviso-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.aviso-body {
    padding: 2rem;
    background: var(--bg-primary);
}

.aviso-body p {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-primary);
    text-align: center;
}

.aviso-footer {
    padding: 1.5rem 2rem 2rem;
    background: var(--bg-primary);
    display: flex;
    justify-content: center;
}

.aviso-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    min-width: 120px;
}

.aviso-btn:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

@keyframes avisoSlideIn {
    0% {
        opacity: 0;
        transform: translate(-50%, -60%) scale(0.8);
    }

    100% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

/* Tema claro para el modal de aviso */
@media (prefers-color-scheme: light) {
    .aviso-overlay {
        background: rgba(148, 163, 184, 0.8);
    }

    .aviso-content {
        box-shadow: 0 25px 50px rgba(148, 163, 184, 0.4);
    }

    .aviso-body {
        background: var(--bg-primary);
    }

    .aviso-footer {
        background: var(--bg-primary);
    }
}

/* Responsive para móviles */
@media (max-width: 425px) {
    .aviso-content {
        width: 95%;
        max-width: none;
    }

    .aviso-header {
        padding: 1rem 1.5rem;
    }

    .aviso-header h2 {
        font-size: 1.2rem;
    }

    .aviso-body {
        padding: 1.5rem;
    }

    .aviso-body p {
        font-size: 1rem;
    }

    .aviso-footer {
        padding: 1rem 1.5rem 1.5rem;
    }
}

/* =================== BREAKPOINTS CONSOLIDADOS FINALES =================== */
/* Aplicados al final para garantizar especificidad y override de reglas anteriores */

/* iPhone SE y dispositivos muy pequeños */
@media (max-width: 320px) {

    /* Espaciado compacto */
    .header-content {
        max-width: 450px;
    }

    /* Viewport mejorado */
    .main {
        height: calc(100dvh - 60px);
    }
}

/* Desktop y pantallas grandes */
@media (min-width: 1025px) {
    .chat-container {
        max-width: 1200px;
    }

    .message-content {
        max-width: 75%;
        font-size: 1.05rem;
        padding: 1rem 1.5rem;
    }

    .welcome-message {
        font-size: 1.25rem;
        max-width: 500px;
        padding: 2rem;
    }

    /* Restaurar efectos avanzados solo en desktop */
    .header,
    .input-area {
        backdrop-filter: blur(10px) !important;
        -webkit-backdrop-filter: blur(10px) !important;
    }

    /* Viewport completo */
    .main {
        height: calc(100vh - 60px);
    }

    .sidebar {
        height: 100vh;
    }
}