:root {
    color-scheme: light;
    --bg: #f7f8fb;
    --card: #ffffff;
    --border: #dbe0ea;
    --text: #1d2733;
    --muted: #5b6574;
    --accent: #1f7aed;
}

body {
    margin: 0;
    font-family: "Inter", "Segoe UI", "Helvetica Neue", sans-serif;
    background: var(--bg);
    color: var(--text);
}

.container {
    width: min(880px, 94vw);
    margin: 0 auto;
}

.header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

.header-bar {
    padding: 24px 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.header-bar h1 {
    margin: 0;
    font-size: 1.85rem;
}

.language-nav {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.language-nav a {
    color: var(--accent);
    text-decoration: none;
}

.language-nav a:hover {
    text-decoration: underline;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 0 0 18px 0;
}

.tab {
    display: inline-flex;
    padding: 6px 16px;
    border-radius: 999px;
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--muted);
    font-size: 0.95rem;
}

.tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.message {
    padding: 18px;
    border-radius: 12px;
    border: 1px solid #ffe58f;
    background: #fffbe6;
    color: #ad8b00;
    margin-bottom: 18px;
}

.message.info {
    background: #f0f5ff;
    border-color: #adc6ff;
    color: #27428c;
}

.file-list {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.file-list h2 {
    margin: 0 0 16px 0;
    font-size: 1.3rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    text-align: left;
    font-weight: 600;
    color: var(--muted);
    padding: 12px;
    border-bottom: 1px solid var(--border);
}

tbody td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
}

.actions {
    text-align: right;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 18px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}

.btn-download:hover {
    background: #0b5ed7;
}

@media (max-width: 640px) {
    thead {
        display: none;
    }

    table,
    tbody,
    tr,
    td {
        display: block;
        width: 100%;
    }

    tbody tr {
        margin-bottom: 14px;
        border: 1px solid var(--border);
        border-radius: 12px;
        background: var(--card);
    }

    tbody td {
        border-bottom: none;
    }

    .actions {
        text-align: left;
        padding-top: 0;
    }

    .btn-download {
        width: 100%;
    }
}