:root {
    --primary: #009DE0;
    --primary-light: rgba(0, 157, 224, 0.1);
    --text-dark: #1C1C1E;
    --text-gray: #8E8E93;
    --bg-color: #FFFFFF;
    --white: #FFFFFF;
    --border: #E5E5EA;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-dark);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 25px rgba(0,0,0,0.05);
}

/* Header */
.app-header {
    padding: 20px;
    text-align: center;
    background-color: var(--white);
    border-bottom: 1px solid var(--border);
}

.app-header h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
}

/* Main Content */
main {
    flex: 1;
    padding: 24px;
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center; /* Center content */
}

section {
    width: 100%;
    margin-bottom: 30px;
    text-align: center;
}

/* Typography */
h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 700;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-gray);
    font-size: 0.95rem;
}

/* Contact Cards/Buttons */
.contact-card {
    background-color: #FAFAFA;
    border-radius: 12px;
    padding: 24px;
    width: 100%;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.contact-card.highlight {
    background-color: #F0FFF4; /* Light green background for WhatsApp */
    border-color: #25D366;
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 15px;
    display: block;
}

/* Buttons */
.contact-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    width: 100%;
    max-width: 300px;
    font-size: 1rem;
}

.contact-button:hover {
    transform: translateY(-2px);
}

.whatsapp-button {
    background-color: #25D366;
    color: var(--white);
    box-shadow: 0 4px 6px rgba(37, 211, 102, 0.2);
}

.whatsapp-button:hover {
    background-color: #22bf5b;
    box-shadow: 0 6px 12px rgba(37, 211, 102, 0.3);
}

.email-button {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 6px rgba(0, 157, 224, 0.2);
}

.email-button:hover {
    background-color: #008ac5;
    box-shadow: 0 6px 12px rgba(0, 157, 224, 0.3);
}

.phone-link {
    display: inline-block;
    margin-top: 10px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}

.phone-link:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Footer (Back Button) */
.app-footer {
    padding: 30px 20px;
    text-align: center;
    border-top: 1px solid var(--border);
    background-color: #FAFAFA;
}

.back-link {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.back-link:hover {
    color: var(--primary);
}

/* Desktop Enhancements */
@media (min-width: 640px) {
    .app-container {
        margin: 40px auto;
        border-radius: 16px;
        min-height: calc(100vh - 80px);
        overflow: hidden;
    }
    
    body {
        padding-bottom: 40px;
    }
}