/* WhatsApp Integration Styles */
:root {
    --wapp-green: #25d366;
    --wapp-dark: #128c7e;
    --wapp-text: #075e54;
    --wapp-border: #eaedee;
    --wapp-shadow: rgba(0, 0, 0, 0.15);
    --wapp-overlay: rgba(0, 0, 0, 0.6);
    --wapp-radius: 16px;
    --wapp-trans: 0.2s ease;
    --wapp-size: 60px;
    --wapp-icon: 32px;
    --wapp-error: #e74c3c;
}

/* Floating Button */
.whatsapp-button {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: var(--wapp-size);
    height: var(--wapp-size);
    border-radius: 50%;
    background: var(--wapp-green);
    box-shadow: 0 4px 12px var(--wapp-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--wapp-trans);
    z-index: 999;
    cursor: pointer;
    will-change: transform;
}

.whatsapp-button:hover {
    transform: translateY(-4px) scale(1.05);
    background: var(--wapp-dark);
    box-shadow: 0 8px 20px rgba(37, 211, 102, 0.3);
}

.whatsapp-button:focus-visible {
    outline: 3px solid rgba(37, 211, 102, 0.5);
    outline-offset: 2px;
}

.whatsapp-button img {
    width: var(--wapp-icon);
    height: var(--wapp-icon);
    filter: brightness(0) invert(1);
    transition: transform var(--wapp-trans);
}

.whatsapp-button:hover img {
    transform: scale(1.1);
}

/* Popup Styles */
.whatsapp-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--wapp-overlay);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.whatsapp-popup.closing {
    animation: fadeOut 0.3s ease forwards;
}

.whatsapp-popup.closing .whatsapp-popup-content {
    animation: slideDown 0.3s ease forwards;
}

.whatsapp-popup-content {
    background: white;
    padding: 28px;
    border-radius: var(--wapp-radius);
    width: 90%;
    max-width: 400px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.3s ease;
    position: relative;
}

/* Header Styles */
.whatsapp-header {
    display: flex;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--wapp-border);
}

.whatsapp-header img {
    width: 32px;
    height: 32px;
    margin-right: 16px;
}

.whatsapp-header h3 {
    margin: 0;
    flex-grow: 1;
    color: var(--wapp-text);
    font-size: 1.25rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 28px;
    color: #666;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 8px;
    transition: all var(--wapp-trans);
    margin: -4px;
}

.close-btn:hover {
    background: #f5f5f5;
    color: #333;
}

.close-btn:focus-visible {
    outline: 2px solid var(--wapp-dark);
    outline-offset: 2px;
}

/* Form Styles */
#whatsappForm {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.error-message {
    color: var(--wapp-error);
    font-size: 0.875rem;
    margin-bottom: 12px;
    padding: 8px 12px;
    background: rgba(231, 76, 60, 0.1);
    border-radius: 6px;
    border-left: 3px solid var(--wapp-error);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

#whatsappForm input,
#whatsappForm textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--wapp-border);
    border-radius: 12px;
    font-size: 1rem;
    transition: all var(--wapp-trans);
    background: #fcfcfc;
    box-sizing: border-box;
}

#whatsappForm input:hover,
#whatsappForm textarea:hover {
    border-color: #d0d4d5;
    background: white;
}

#whatsappForm input:focus,
#whatsappForm textarea:focus {
    border-color: var(--wapp-green);
    background: white;
    outline: none;
    box-shadow: 0 0 0 4px rgba(37, 211, 102, 0.1);
}

#whatsappForm input[aria-invalid="true"],
#whatsappForm input:invalid:not(:placeholder-shown) {
    border-color: var(--wapp-error);
}

#whatsappForm textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.5;
}

#whatsappForm button[type="submit"] {
    background: var(--wapp-green);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all var(--wapp-trans);
    will-change: transform;
}

#whatsappForm button[type="submit"]:hover {
    background: var(--wapp-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.2);
}

#whatsappForm button[type="submit"]:focus-visible {
    outline: 3px solid rgba(37, 211, 102, 0.5);
    outline-offset: 2px;
}

#whatsappForm button[type="submit"] img {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(1);
}

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

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

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from { 
        opacity: 1;
        transform: translateY(0);
    }
    to { 
        opacity: 0;
        transform: translateY(20px);
    }
}

/* Responsive Styles */
@media (max-width: 480px) {
    .whatsapp-popup {
        align-items: flex-end;
    }

    .whatsapp-popup-content {
        width: 100%;
        max-width: none;
        border-radius: var(--wapp-radius) var(--wapp-radius) 0 0;
        margin: 0;
        animation: slideUpMobile 0.3s ease;
    }

    .whatsapp-popup.closing .whatsapp-popup-content {
        animation: slideDownMobile 0.3s ease forwards;
    }

    @keyframes slideUpMobile {
        from { transform: translateY(100%); }
        to { transform: translateY(0); }
    }

    @keyframes slideDownMobile {
        from { transform: translateY(0); }
        to { transform: translateY(100%); }
    }

    #whatsappForm button[type="submit"] {
        margin-bottom: env(safe-area-inset-bottom, 0px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .whatsapp-button,
    .whatsapp-popup,
    .whatsapp-popup-content,
    #whatsappForm input,
    #whatsappForm textarea,
    #whatsappForm button {
        transition: none;
        animation: none;
    }
}