:root {
    --bg: #f4f8fb;
    --surface: #ffffff;
    --surface-alt: #eef5fa;
    --text: #1f2a37;
    --muted: #5b6b7f;
    --primary: #0f766e;
    --primary-strong: #0b5f58;
    --accent: #f59e0b;
    --border: #d9e4ef;
    --shadow: 0 10px 28px rgba(16, 24, 40, 0.08);
    --radius: 16px;
    --radius-sm: 12px;
    --max-width: 1120px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    font-family: "Segoe UI", "Avenir Next", "Trebuchet MS", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 90% -10%, #c7f9ec 0%, rgba(199, 249, 236, 0) 42%),
        radial-gradient(circle at 0% 0%, #dbeafe 0%, rgba(219, 234, 254, 0) 36%),
        var(--bg);
    min-height: 100%;
    line-height: 1.5;
}

.container {
    width: min(92%, var(--max-width));
    margin: 0 auto;
}

.hero {
    padding: 72px 0 20px;
    text-align: left;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #e3f7f4;
    color: var(--primary-strong);
    border: 1px solid #bbe8e2;
    border-radius: 999px;
    padding: 6px 14px;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.2px;
}

h1 {
    margin: 18px 0 12px;
    font-size: clamp(1.9rem, 4vw, 3.1rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.subtitle {
    margin: 0;
    color: var(--muted);
    max-width: 740px;
    font-size: clamp(1rem, 2vw, 1.16rem);
}

section {
    padding: 22px 0 18px;
}

.section-title {
    font-size: clamp(1.35rem, 2.3vw, 2rem);
    margin: 0 0 8px;
    letter-spacing: -0.01em;
}

.section-subtitle {
    margin: 0 0 24px;
    color: var(--muted);
}

.collections-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.collection-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: 0 2px 8px rgba(16, 24, 40, 0.04);
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.collection-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: #c7d9ea;
}

.card-title {
    margin: 0;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-description {
    margin: 0;
    color: var(--muted);
    font-size: 0.96rem;
}

.endpoint-list {
    margin: 2px 0 6px 18px;
    color: #324255;
    padding-left: 0;
    display: grid;
    gap: 6px;
    font-size: 0.95rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
}

.feature-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    display: grid;
    gap: 4px;
    min-height: 104px;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.feature-item:hover {
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
    transform: translateY(-2px);
}

.feature-name {
    margin: 0;
    font-size: 0.98rem;
    font-weight: 700;
}

.feature-text {
    margin: 0;
    font-size: 0.9rem;
    color: var(--muted);
}

.empty-state {
    display: none;
    background: var(--surface);
    border: 1px dashed #b9ccdd;
    border-radius: var(--radius-sm);
    padding: 18px;
    color: var(--muted);
    text-align: center;
}

footer {
    margin-top: 28px;
    padding: 26px 0 34px;
    border-top: 1px solid #d9e4ef;
    color: #405165;
    font-size: 0.94rem;
}

footer a {
    color: #0f766e;
    text-decoration: none;
    font-weight: 600;
}

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

@media (max-width: 1024px) {
    .collections-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .features-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    .hero {
        padding-top: 56px;
    }

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

    .collection-card {
        padding: 18px;
    }
}