#chat-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--color-surface, #ffffff);
    color: var(--color-text, #334155);
    border-radius: 16px;
    width: 340px;
    max-height: 440px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
    border: 1px solid #e2e8f0;
    z-index: 9999;
    display: none;
}

#chat-container.is-open {
    display: block;
}

#chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1rem;
    cursor: move;
    user-select: none;
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    color: #ffffff;
    font-weight: 600;
    font-size: 0.95rem;
}

#chat-close {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #ffffff;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#chat-close:hover {
    background: rgba(255, 255, 255, 0.25);
}

#chat-box {
    overflow-y: auto;
    max-height: 340px;
    padding: 1rem;
    background: #f8fafc;
}

#chat-box input {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    margin-top: 0.5rem;
    font-family: inherit;
    font-size: 0.9rem;
}

#chat-box input:focus {
    outline: 2px solid #bfdbfe;
    border-color: #93c5fd;
}

#chat-box button {
    margin: 0.4rem 0.25rem 0.4rem 0;
    padding: 0.55rem 0.9rem;
    background: #1d4ed8;
    color: #ffffff;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    font-family: inherit;
    transition: background 0.2s;
}

#chat-box button:hover {
    background: #1e3a8a;
}

.mensaje,
.mensaje-bienvenida {
    padding: 0.65rem 0.85rem;
    border-radius: 12px;
    margin: 0.4rem 0;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    font-size: 0.9rem;
    line-height: 1.5;
}

.mensaje-bienvenida {
    background: #dbeafe;
    border-color: #bfdbfe;
    color: #1e3a8a;
}

#chat-toggle {
    position: fixed;
    bottom: 16px;
    right: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a8a, #2563eb);
    color: #ffffff;
    padding: 0.75rem 1.15rem;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    z-index: 10000;
    font-weight: 600;
    font-size: 0.9rem;
    font-family: inherit;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#chat-toggle.is-hidden {
    display: none;
}

#chat-toggle:hover {
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    #chat-container {
        width: calc(100% - 1.5rem);
        right: 0.75rem;
        bottom: 0.75rem;
        max-height: min(440px, 72vh);
    }

    #chat-box {
        max-height: min(340px, 55vh);
    }

    #chat-box button {
        width: 100%;
        min-height: 44px;
        margin: 0.35rem 0;
    }

    #chat-toggle {
        bottom: 0.75rem;
        right: 0.75rem;
        min-height: 48px;
    }
}