:root {
    --bg-color: #ffffff;
    --section-bg: #f6f8fa;
    --accent-color: #2ea043;
    --text-main: #24292f;
    --text-dim: #57606a;
    --border-color: #d0d7de;
    --card-shadow: 0 3px 12px rgba(31,35,40,0.07);
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Header --- */
header {
    padding: 80px 0 48px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 60px;
}

h1 {
    font-size: 2.25rem;
    font-weight: 600;
    margin: 0 0 12px 0;
    letter-spacing: -0.5px;
}

.lead {
    font-size: 1.1rem;
    color: var(--text-dim);
    margin: 0;
}

/* --- Section Titles --- */
.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 24px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* --- Applications Grid --- */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 80px;
}

.app-card {
    display: flex;
    flex-direction: column;
    padding: 24px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.app-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--card-shadow);
    transform: translateY(-2px);
}

.icon-box {
    width: 44px;
    height: 44px;
    background: var(--section-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.app-card h2 {
    font-size: 1.25rem;
    margin: 0 0 8px 0;
}

.app-description {
    font-size: 0.95rem;
    color: var(--text-dim);
    margin-bottom: 20px;
    flex-grow: 1;
}

.status-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.status-tag::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--accent-color);
    border-radius: 50%;
}

/* --- External Links Section --- */
.links-section {
    padding-top: 60px;
    border-top: 1px solid var(--border-color);
    margin-bottom: 100px;
}

.link-category {
    margin-bottom: 32px;
}

.link-category-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    display: block;
}

.link-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 12px;
}

.link-item {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: all 0.2s;
}

.link-item:hover {
    background-color: var(--section-bg);
    border-color: #848d97;
}

.link-item .link-url {
    margin-left: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-dim);
    font-weight: 400;
}

.link-item::before {
    content: "🔗";
    margin-right: 12px;
    font-size: 1rem;
    filter: grayscale(1);
}

/* --- Footer --- */
footer {
    padding: 60px 0;
    background: var(--section-bg);
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-dim);
}

@media (max-width: 600px) {
    .link-list { grid-template-columns: 1fr; }
    .link-item .link-url { display: none; }
}