/* =====================================================
   ICAREUS - Assistent Facturació TOAD
   Estils alineats amb la web oficial advocaciareus.cat
   ===================================================== */

/* Variables de color (paleta oficial ICAR) */
:root {
    --primary-blue: #37477a;
    --secondary-blue: #84a6ca;
    --dark-text: #353535;
    --light-gray: #f5f7fa;
    --white: #ffffff;
    --accent-gold: #c9a227;
    --border-color: #e0e5eb;
    --shadow-color: rgba(55, 71, 122, 0.1);
    --success-green: #28a745;
    --error-red: #dc3545;
}

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

html, body {
    height: 100%;
}

body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    background-color: var(--light-gray);
    color: var(--dark-text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

/* =====================================================
   HEADER
   ===================================================== */
header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #2a3660 100%);
    color: var(--white);
    padding: 0.75rem 2rem;
    box-shadow: 0 4px 12px var(--shadow-color);
    position: relative;
    flex-shrink: 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 1.5rem;
}

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

.logo {
    height: 50px;
    width: auto;
    filter: brightness(0) invert(1);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.02);
}

.header-text {
    flex: 1;
}

.header-text h1 {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 0.15rem;
}

.header-text .subtitle {
    font-size: 0.8rem;
    font-weight: 300;
    opacity: 0.9;
    color: var(--secondary-blue);
}

.header-accent {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-gold) 0%, var(--secondary-blue) 50%, var(--accent-gold) 100%);
}

/* =====================================================
   MAIN CONTENT
   ===================================================== */
main {
    flex: 1;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* =====================================================
   WELCOME SCREEN (TARJETA CENTRADA)
   ===================================================== */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 0;
    width: 100%;
    max-width: 900px;
}

.welcome-card {
    background: var(--white);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    box-shadow: 0 4px 25px var(--shadow-color);
    border: 1px solid var(--border-color);
    text-align: center;
    width: 100%;
    max-width: 900px;
}

.welcome-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, var(--secondary-blue) 0%, #a8c5de 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(132, 166, 202, 0.4);
}

.welcome-icon svg {
    width: 35px;
    height: 35px;
    color: var(--primary-blue);
}

.welcome-card h2 {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.welcome-subtitle {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 1.5rem;
}

.quick-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
}

.quick-btn {
    padding: 0.65rem 1.1rem;
    background: var(--white);
    border: 2px solid var(--secondary-blue);
    border-radius: 25px;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-blue);
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-btn:hover {
    background: var(--secondary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(132, 166, 202, 0.4);
}

.quick-btn:active {
    transform: translateY(0);
}

/* =====================================================
   CHAT CONTAINER
   ===================================================== */
.chat-container {
    flex: 1;
    width: 100%;
    max-width: 900px;
    overflow-y: auto;
    padding: 0.5rem 0;
    scroll-behavior: smooth;
    display: none;
}

.chat-container.active {
    display: block;
}

/* =====================================================
   MENSAJES DEL CHAT
   ===================================================== */
.message {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    animation: fadeIn 0.3s ease;
}

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

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1rem;
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    box-shadow: 0 2px 8px rgba(55, 71, 122, 0.3);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--secondary-blue), #a8c5de);
    color: var(--primary-blue);
}

.message-content {
    max-width: 75%;
    padding: 0.75rem 1rem;
    border-radius: 16px;
    line-height: 1.5;
    font-size: 0.9rem;
}

.message.assistant .message-content {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 16px 16px 16px 4px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--primary-blue), #2a3660);
    color: var(--white);
    border-radius: 16px 16px 4px 16px;
    box-shadow: 0 2px 8px rgba(55, 71, 122, 0.25);
}

.message-content .sender-name {
    font-weight: 600;
    font-size: 0.8rem;
    margin-bottom: 0.25rem;
    color: var(--primary-blue);
}

.message.user .message-content .sender-name {
    color: var(--secondary-blue);
}

.message-content p {
    margin-bottom: 0.4rem;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content ul,
.message-content ol {
    margin: 0.2rem 0;
    padding-left: 1.25rem;
}

.message-content li {
    margin-bottom: 0;
}

.message-content strong {
    font-weight: 600;
    color: var(--primary-blue);
}

.message.user .message-content strong {
    color: var(--accent-gold);
}

.message-content code {
    background: rgba(55, 71, 122, 0.1);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}

/* =====================================================
   DISCLAIMER
   ===================================================== */
.disclaimer {
    max-width: 900px;
    margin: 0.5rem auto;
    text-align: center;
    padding: 0 1rem;
}

.disclaimer p {
    font-size: 0.75rem;
    color: #777;
    font-weight: 400;
    font-style: italic;
    margin: 0;
}

/* =====================================================
   FOOTER E INPUT
   ===================================================== */
footer {
    background: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    box-shadow: 0 -2px 10px var(--shadow-color);
    flex-shrink: 0;
}

.input-container {
    max-width: 900px;
    margin: 0 auto 0.5rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.input-container input {
    flex: 1;
    padding: 0.7rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 0.9rem;
    font-family: 'Montserrat', sans-serif;
    transition: all 0.3s ease;
    background: var(--white);
}

.input-container input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(55, 71, 122, 0.15);
}

.input-container input::placeholder {
    color: #999;
    font-weight: 300;
}

.reload-btn,
.input-container button[type="submit"] {
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.reload-btn {
    background: var(--light-gray);
    color: var(--primary-blue);
    border: 2px solid var(--border-color);
}

.reload-btn:hover {
    background: var(--secondary-blue);
    color: var(--white);
    border-color: var(--secondary-blue);
    transform: rotate(-180deg);
}

.input-container button[type="submit"] {
    background: linear-gradient(135deg, var(--primary-blue), #2a3660);
    color: var(--white);
    box-shadow: 0 2px 8px rgba(55, 71, 122, 0.3);
}

.input-container button[type="submit"]:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(55, 71, 122, 0.4);
}

.input-container button[type="submit"]:active {
    transform: scale(0.98);
}

.input-container button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.footer-info {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    font-size: 0.75rem;
    color: #777;
}

.footer-info p {
    margin: 0.15rem 0;
}

.footer-info a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-info a:hover {
    color: var(--secondary-blue);
    text-decoration: underline;
}

/* =====================================================
   LOADING INDICATOR
   ===================================================== */
.loading-indicator {
    display: none;
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    box-shadow: 0 4px 15px var(--shadow-color);
    align-items: center;
    gap: 0.75rem;
    z-index: 100;
    border: 1px solid var(--border-color);
}

.loading-indicator.active {
    display: flex;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-indicator span {
    font-size: 0.85rem;
    color: var(--primary-blue);
    font-weight: 500;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
    header {
        padding: 0.75rem 1rem;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
        justify-content: center;
        gap: 0.75rem;
    }
    
    .logo {
        height: 45px;
    }
    
    .header-text h1 {
        font-size: 1.2rem;
    }
    
    .header-text .subtitle {
        font-size: 0.75rem;
    }
    
    main {
        padding: 1rem;
    }
    
    .welcome-card {
        padding: 2rem 1.5rem;
    }
    
    .welcome-icon {
        width: 60px;
        height: 60px;
    }
    
    .welcome-icon svg {
        width: 30px;
        height: 30px;
    }
    
    .welcome-card h2 {
        font-size: 1.15rem;
    }
    
    .welcome-subtitle {
        font-size: 0.9rem;
    }
    
    .quick-btn {
        padding: 0.55rem 0.9rem;
        font-size: 0.8rem;
    }
    
    .message-content {
        max-width: 85%;
        padding: 0.7rem 0.9rem;
        font-size: 0.85rem;
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
    
    footer {
        padding: 0.6rem 1rem;
    }
    
    .input-container input {
        padding: 0.6rem 0.9rem;
        font-size: 0.85rem;
    }
    
    .reload-btn,
    .input-container button[type="submit"] {
        width: 38px;
        height: 38px;
    }
}

@media (max-width: 480px) {
    .logo {
        height: 40px;
    }
    
    .header-text h1 {
        font-size: 1.05rem;
    }
    
    .welcome-card {
        padding: 1.5rem 1rem;
    }
    
    .welcome-card h2 {
        font-size: 1.05rem;
    }
    
    .quick-buttons {
        gap: 0.5rem;
    }
    
    .quick-btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.75rem;
    }
    
    .message {
        gap: 0.5rem;
    }
    
    .message-content {
        max-width: 88%;
        padding: 0.6rem 0.8rem;
    }
}

/* =====================================================
   SCROLLBAR PERSONALIZADA
   ===================================================== */
.chat-container::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: 3px;
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--secondary-blue);
    border-radius: 3px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue);
}

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

.text-center {
    text-align: center;
}

.text-muted {
    color: #777;
}