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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #fff5f5 0%, #ffe8e8 100%);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 60px 20px 40px;
}

.logo {
    width: 128px;
    height: 128px;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 12px rgba(220, 38, 38, 0.2));
}

h1 {
    font-size: 3em;
    color: #dc2626;
    margin-bottom: 10px;
    font-weight: 700;
}

.tagline {
    font-size: 1.3em;
    color: #666;
    margin-bottom: 30px;
}

.download-badges {
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.download-badges a {
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.download-badges a:hover {
    transform: translateY(-2px);
    opacity: 0.85;
}

.badge {
    height: 54px;
    width: auto;
}

.btn {
    padding: 15px 35px;
    font-size: 1.1em;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

.btn-primary {
    background: #dc2626;
    color: white;
}

.btn-primary:hover {
    background: #b91c1c;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
}

.btn-secondary {
    background: white;
    color: #dc2626;
    border: 2px solid #dc2626;
}

.btn-secondary:hover {
    background: #dc2626;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
}

.btn-appstore {
    background: #000;
    color: white;
}

.btn-appstore:hover {
    background: #333;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.screenshot-section {
    text-align: center;
    margin: 40px 0;
}

.screenshot {
    max-width: 40%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.notification-styles {
    margin: 60px 0;
}

.notification-styles h2 {
    text-align: center;
    color: #dc2626;
    font-size: 2.2em;
    margin-bottom: 15px;
}

.notification-styles > p {
    text-align: center;
    color: #666;
    font-size: 1.1em;
    margin-bottom: 40px;
}

.notification-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.notification-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.notification-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.15);
}

.notification-card img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.notification-card h3 {
    color: #dc2626;
    margin-bottom: 10px;
    font-size: 1.4em;
}

.notification-card p {
    color: #555;
    line-height: 1.6;
}

.mask-section {
    margin: 60px 0;
    text-align: center;
}

.mask-section h2 {
    color: #dc2626;
    font-size: 2.2em;
    margin-bottom: 15px;
}

.mask-section > p {
    color: #666;
    font-size: 1.1em;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.mask-section img {
    max-width: 70%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin: 60px 0;
}

.features h2 {
    grid-column: 1 / -1;
    text-align: center;
    color: #dc2626;
    font-size: 2.2em;
    margin-bottom: 15px;
}

.feature {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border-left: 4px solid #dc2626;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.15);
}

.feature h3 {
    color: #dc2626;
    margin-bottom: 12px;
    font-size: 1.3em;
}

.feature p {
    color: #555;
    line-height: 1.7;
}

.integration-section {
    background: white;
    padding: 40px;
    border-radius: 12px;
    margin: 40px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.integration-section h2 {
    color: #dc2626;
    margin-bottom: 20px;
    font-size: 2em;
}

.integration-section h3 {
    color: #16a34a;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 1.4em;
}

.integration-section code {
    background: #f5f5f5;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: "SF Mono", Monaco, monospace;
    color: #dc2626;
    overflow-wrap: break-word;
    word-break: break-word;
}

.integration-section ul {
    list-style: none;
    padding-left: 20px;
}

.integration-section li {
    margin: 10px 0;
    color: #555;
}

.integration-section li:before {
    content: "→ ";
    color: #16a34a;
    font-weight: bold;
    margin-right: 8px;
}

footer {
    text-align: center;
    padding: 40px 20px;
    color: #666;
    margin-top: 60px;
}

footer a {
    color: #dc2626;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2em;
    }

    .tagline {
        font-size: 1.1em;
    }

    .download-badges {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

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