/* ========================================
   GMP Presupuestos Chatbot - Styles
   Basado en el branding corporativo de GMP
======================================== */

:root {
    /* Colores del branding GMP */
    --gmp-black: #000000;
    --gmp-blue: #41659a;
    --gmp-green: #bace0d;
    --gmp-orange: #f39200;
    --gmp-red: #e94e1b;
    --gmp-magenta: #e71e73;
    --gmp-burgundy: #a2195b;
    --gmp-turquoise: #00a19a;
    --gmp-yellow: #f1e159;

    /* Colores de la aplicación */
    --color-primary: var(--gmp-blue);
    --color-primary-dark: #345280;
    --color-secondary: var(--gmp-turquoise);
    --color-accent: var(--gmp-orange);
    --color-background: #f5f7fa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-error: var(--gmp-red);
    --color-success: var(--gmp-turquoise);

    /* Gradientes */
    --gradient-header: linear-gradient(135deg, var(--gmp-blue) 0%, var(--gmp-turquoise) 100%);
    --gradient-button: linear-gradient(135deg, var(--gmp-blue) 0%, var(--gmp-turquoise) 100%);

    /* Tipografía */
    --font-primary: 'Barlow Semi Condensed', sans-serif;
    --font-secondary: 'Barlow', sans-serif;

    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Bordes */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-full: 9999px;

    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset y base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Contenedor principal */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
}

/* Header */
.app-header {
    background: var(--gradient-header);
    color: white;
    flex-shrink: 0;
}

.header-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
}

.logo-container {
    flex-shrink: 0;
}

.logo {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    background: white;
    padding: 4px;
    object-fit: contain;
}

.header-text h1 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.header-text p {
    font-size: 0.875rem;
    font-weight: 300;
    opacity: 0.9;
}

/* ========================================
   Pantalla de subida de archivo
======================================== */
.upload-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.upload-container {
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.upload-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.upload-icon svg {
    width: 80px;
    height: 80px;
}

.upload-container h2 {
    font-family: var(--font-primary);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.upload-container > p {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

/* Dropzone */
.upload-dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    background: var(--color-surface);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
    border-color: var(--color-primary);
    background: rgba(65, 101, 154, 0.05);
}

.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.dropzone-content svg {
    color: var(--color-primary);
    opacity: 0.7;
}

.dropzone-content p {
    font-size: 1rem;
    color: var(--color-text-muted);
}

.browse-link {
    color: var(--color-primary);
    font-weight: 500;
    text-decoration: underline;
}

.file-types {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    opacity: 0.7;
}

/* File preview */
.file-preview {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
}

.file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.file-info svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.file-info span {
    flex: 1;
    text-align: left;
    font-size: 0.875rem;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.remove-file-btn {
    background: transparent;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--color-text-muted);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.remove-file-btn:hover {
    color: var(--color-error);
    background: rgba(233, 78, 27, 0.1);
}

/* Start chat button */
.start-chat-btn {
    margin-top: var(--spacing-xl);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-button);
    color: white;
    border: none;
    border-radius: var(--border-radius-full);
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.start-chat-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.start-chat-btn:active:not(:disabled) {
    transform: translateY(0);
}

.start-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   Pantalla del chat
======================================== */
.chat-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--color-background);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Mensajes */
.message {
    max-width: 80%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    font-size: 0.9375rem;
    line-height: 1.5;
    animation: messageIn 0.3s ease;
}

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

.message-bot {
    align-self: flex-start;
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: 4px;
    position: relative;
    margin-left: 40px;
}

.message-bot::before {
    content: "";
    position: absolute;
    left: -35px;
    bottom: 0;
    width: 30px;
    height: 30px;
    background-image: url(https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTTufBG30xpMtBfoAG9hi8aSGJAeU3WMwqk5Q&s);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    background-color: white;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.message-user {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--gmp-turquoise) 0%, var(--gmp-blue) 100%);
    color: white;
    border-bottom-right-radius: 4px;
}

.message-file {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.message-file svg {
    flex-shrink: 0;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--spacing-md);
    align-items: center;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--color-text-muted);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) { animation-delay: 0s; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

/* Chat footer */
.chat-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md);
    position: relative;
}

.chat-input-container {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.chat-input-container:focus-within {
    border-color: var(--color-primary);
}

.chat-input-container.dragover {
    border-color: var(--color-primary);
    background: rgba(65, 101, 154, 0.05);
}

/* Botón clip de adjuntar */
.attach-icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--border-radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.attach-icon-btn:hover {
    color: var(--color-primary);
    background: rgba(65, 101, 154, 0.1);
}

/* Indicador de drop */
.drop-indicator {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(65, 101, 154, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-md);
    margin: var(--spacing-sm);
    pointer-events: none;
}

.drop-indicator span {
    color: white;
    font-size: 1rem;
    font-weight: 600;
}

#chat-input {
    flex: 1;
    border: none;
    background: transparent;
    font-family: var(--font-secondary);
    font-size: 0.9375rem;
    resize: none;
    outline: none;
    min-height: 24px;
    max-height: 120px;
    padding: var(--spacing-xs);
}

.send-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-button);
    border: none;
    border-radius: var(--border-radius-sm);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    transform: scale(1.05);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   Loading overlay
======================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    z-index: 1000;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-overlay p {
    font-size: 1rem;
    color: var(--color-text-muted);
}

/* ========================================
   Utilidades
======================================== */
.hidden {
    display: none !important;
}

/* Scrollbar personalizado */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-background);
}

::-webkit-scrollbar-thumb {
    background: var(--color-text-muted);
    border-radius: 4px;
}

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

/* Links en mensajes */
.message a {
    color: var(--gmp-orange);
    text-decoration: underline;
}

.message a:hover {
    color: var(--gmp-red);
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 640px) {
    .header-content {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .logo {
        width: 40px;
        height: 40px;
    }

    .header-text h1 {
        font-size: 1.1rem;
    }

    .header-text p {
        font-size: 0.75rem;
    }

    .upload-container h2 {
        font-size: 1.5rem;
    }

    .upload-dropzone {
        padding: var(--spacing-xl);
    }

    .message {
        max-width: 90%;
    }

    .message-bot {
        margin-left: 30px;
    }

    .message-bot::before {
        width: 25px;
        height: 25px;
        left: -28px;
    }
}