* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    height: 80px;

    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 0 3rem;

    background: white;
    border-bottom: 1px solid #eee;
    z-index: 100;
}

nav {
    display: flex;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: #333;
}

.hero {
    height: 100vh;

    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;

    padding: 0 8rem;
    gap: 4rem;
}

.hero-image {
    padding-top: 5%;
    margin-top: 5%;
    height: 600px;

    border-radius: 16px;

    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-content p {
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: #666;
}

.hero-content button {
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
}

.hero-content button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}


.hero-section {
    min-height: 100vh;

    display: flex;
    flex-direction: column;
    justify-content: center;

    padding: 6rem 8rem;

    border-top: 1px solid transparent;
}

.how-it-works {
    background: #f8f9fb;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.step {
    max-width: 240px;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;

    margin: 0 auto 1rem;

    border-radius: 50%;

    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 1.5rem;
    font-weight: bold;

    background: #25d366;
    color: white;
}

.step h3 {
    margin-bottom: 1rem;
}

.step p {
    color: #666;
    line-height: 1.5;
}

.step-arrow {
    font-size: 2rem;
    color: #999;
}

.why-whatsapp {
    background: white;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(300px, 400px));
    gap: 2rem;
    justify-content: center;
}

.benefit-card {
    padding: 2rem;

    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;

    text-align: center;
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    margin-bottom: 1rem;
}

.benefit-card p {
    color: #666;
    line-height: 1.6;
}

.use-cases {
    background: #f8f9fb;
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(320px, 450px));
    gap: 2rem;
    justify-content: center;
}

.use-case-card {
    padding: 2rem;

    background: white;
    border-radius: 16px;
    border: 1px solid #e5e7eb;

    transition: transform 0.2s ease;
}

.use-case-card:hover {
    transform: translateY(-4px);
}

.use-case-card h3 {
    margin-bottom: 1rem;
}

.use-case-card p {
    color: #666;
    line-height: 1.6;
}

.join-beta {
    background: linear-gradient(
        135deg,
        #075e54,
        #128c7e
    );

    color: white;

    display: flex;
    align-items: center;
    justify-content: center;

    text-align: center;
}

.cta-container {
    max-width: 800px;
}

.cta-container h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.cta-container p {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

.cta-container button {
    padding: 1rem 2.5rem;

    font-size: 1.1rem;
    font-weight: 600;

    border: none;
    border-radius: 10px;

    background: white;
    color: #075e54;
}

.cta-container button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.cta-note {
    margin-top: 1rem;
    opacity: 0.8;
    font-size: 0.95rem;
}


.page-container {
    max-width: 800px;
    margin: 120px auto;
    padding: 0 2rem;
}

.page-container h1 {
    margin-bottom: 2rem;
}

.page-container p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: #555;
}

.page-container h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.page-container ul {
    margin-bottom: 1.5rem;
    margin-left: 2rem;
}

.page-container li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* =========================
   Mobile Responsive Styles
   ========================= */

@media (max-width: 768px) {

    /* Header */

    header {
        flex-direction: column;
        height: auto;
        padding: 1rem;
        gap: 1rem;
    }

    nav {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    /* Hero 1 */

    .hero {
        min-height: 100vh;

        grid-template-columns: 1fr;

        padding: 6rem 2rem 2rem 2rem;
        gap: 2rem;

        text-align: center;
    }

    .hero-image {
        height: auto;
        max-width: 100%;
        margin: 0;
        padding: 0;
    }

    .hero-image img {
        max-width: 100%;
        height: auto;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    /* All hero sections */

    .hero-section {
        padding: 4rem 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .section-header p {
        font-size: 1rem;
    }

    /* Hero 2 */

    .steps {
        flex-direction: column;
        gap: 1rem;
    }

    .step {
        max-width: 100%;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    /* Hero 3 */

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    /* Hero 4 */

    .use-case-grid {
        grid-template-columns: 1fr;
    }

    /* Hero 5 */

    .cta-container h2 {
        font-size: 2rem;
    }

    .cta-container p {
        font-size: 1rem;
    }

    /* Content pages */

    .page-container {
        margin: 140px auto 60px auto;
        padding: 0 1.5rem;
    }
}

@media (max-width: 768px) {

    .hero-section {
        padding: 6rem 2rem;
    }
}