:root {
    --primary-color: #3f51b5;
    --background-color: #f3f4f6; /* gray-100 */
    --card-bg-color: #ffffff;
    --text-dark: #1f2937; /* gray-800 */
    --text-light: #4b5568; /* gray-600 */
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-dark);
    margin: 0;
    padding: 0;
}

.header {
    text-align: center;
    padding: 3rem 1rem;
    background-color: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}

.title { font-size: 3rem; font-weight: 800; letter-spacing: -0.025em; color: var(--text-dark); }
.subtitle { font-size: 1.25rem; color: var(--text-light); margin-top: 0.5rem; }

.main-content {
    width: 100%;
    padding: 4rem 1rem;
}

.main-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    max-width: 1100px;
    margin: 0 auto;
}

.feature-card {
    background-color: var(--card-bg-color);
    border-radius: 0.75rem;
    padding: 2.5rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
    max-width: 450px;
    width: 100%;
    flex-shrink: 0;
    border: 1px solid rgba(0,0,0,0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}

.card-icon { margin-bottom: 1.5rem; }
.card-icon img { width: 80px; height: 80px; margin: 0 auto; }
.card-title { font-size: 2.25rem; font-weight: 700; margin-bottom: 1rem; }
.card-description { font-size: 1rem; color: var(--text-light); margin-bottom: 2rem; line-height: 1.6; }
.launch-button { display: inline-block; background-color: var(--primary-color); color: #ffffff; padding: 1rem 2.5rem; border-radius: 0.5rem; font-weight: 600; font-size: 1.125rem; transition: background-color 0.2s ease-in-out; }
.feature-card:hover .launch-button { background-color: #313f8c; }

/* Features List Styling */
.features-list { display: flex; flex-direction: column; gap: 2.5rem; max-width: 400px; }
.feature-item { display: flex; align-items: center; text-align: left; gap: 1.5rem; }
.feature-icon { flex-shrink: 0; }
.feature-icon svg { width: 40px; height: 40px; fill: var(--text-light); opacity: 0.8; }
.feature-title { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.25rem; }
.feature-text { color: var(--text-light); line-height: 1.6; }

/* Teaser Section Styling */
.teaser-section {
    background-color: var(--text-dark);
    color: #ffffff;
    text-align: center;
    padding: 3rem 1rem;
}
.teaser-title {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 1rem;
}
.teaser-text {
    font-size: 1.125rem;
    color: #d1d5db; /* gray-300 */
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.75;
}

/* Info Grid for About & Contact */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    max-width: 1200px;
    margin: 0 auto;
    background-color: #ffffff;
}
.about-section, .contact-section {
    padding: 4rem 2rem;
    text-align: center;
}
.contact-section {
    background-color: var(--background-color);
}
.section-title { font-size: 2.25rem; font-weight: 700; margin-bottom: 1.5rem; }
.section-text { font-size: 1.125rem; color: var(--text-light); line-height: 1.75; max-width: 500px; margin: 0 auto; }
.contact-link { color: var(--primary-color); font-weight: 500; text-decoration: none; }
.contact-link:hover { text-decoration: underline; }

.footer {
    text-align: center;
    padding: 2rem 1rem;
    font-size: 0.875rem;
    color: var(--text-light);
    background-color: var(--background-color);
    border-top: 1px solid #e5e7eb;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .main-layout {
        flex-direction: column;
        gap: 3rem;
    }
    .features-list {
        max-width: 500px;
        margin-top: 2rem;
    }
    .info-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 640px) {
    .header, .teaser-section, .about-section, .contact-section { padding: 2.5rem 1.5rem; }
    .title { font-size: 2.25rem; }
    .subtitle { font-size: 1rem; }
    .feature-card { padding: 2rem; }
    .section-title, .teaser-title { font-size: 1.5rem; }
    .section-text, .feature-text, .teaser-text { font-size: 1rem; }
}