:root {
    --bg: #ebe7df;
    --bg-line: rgba(44, 42, 38, 0.06);
    --paper: #f7f5f0;
    --ink: #2c2a26;
    --ink-soft: #5c5850;
    --ink-muted: #8a8478;
    --line: #d8d3c8;
    --accent: #3d6b59;
    --accent-hover: #2f5546;
    --accent-2: #b85c38;
    --shadow: 0 1px 0 rgba(44, 42, 38, 0.04), 0 12px 32px rgba(44, 42, 38, 0.06);
    --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --mono: "JetBrains Mono", "SF Mono", "Consolas", monospace;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--ink);
    background-color: var(--bg);
    background-image:
        linear-gradient(var(--bg-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--bg-line) 1px, transparent 1px);
    background-size: 24px 24px;
}

a {
    color: inherit;
    text-decoration: none;
}

.shell {
    max-width: 920px;
    margin: 0 auto;
    padding: 48px 24px 64px;
}

.top {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.brand-mark {
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
}

.brand h1 {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.brand p {
    margin: 0;
    font-size: 0.9375rem;
    color: var(--ink-soft);
    max-width: 28em;
    line-height: 1.55;
}

.top-meta {
    text-align: right;
    font-family: var(--mono);
    font-size: 0.8125rem;
    color: var(--ink-muted);
    line-height: 1.6;
}

.tools {
    display: grid;
    gap: 16px;
}

.tool {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 20px;
    padding: 22px 24px;
    background: var(--paper);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.tool:hover {
    border-color: #c4bfb4;
    transform: translateY(-1px);
}

.tool:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.tool-index {
    font-family: var(--mono);
    font-size: 0.8125rem;
    color: var(--ink-muted);
    width: 2rem;
    text-align: center;
}

.tool-body h2 {
    margin: 0 0 6px;
    font-size: 1.125rem;
    font-weight: 600;
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

.tag {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.04em;
    padding: 2px 7px;
    border: 1px solid var(--line);
    color: var(--ink-soft);
    background: var(--bg);
}

.tool-body p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--ink-soft);
    line-height: 1.5;
}

.tool-go {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 0.8125rem;
    color: var(--accent);
    white-space: nowrap;
}

.tool-go svg {
    width: 16px;
    height: 16px;
    transition: transform 0.15s ease;
}

.tool:hover .tool-go svg {
    transform: translateX(3px);
}

.tool--warm .tool-go {
    color: var(--accent-2);
}

.note {
    margin-top: 32px;
    padding: 14px 18px;
    font-size: 0.8125rem;
    color: var(--ink-muted);
    line-height: 1.55;
    border-left: 3px solid var(--line);
    background: rgba(247, 245, 240, 0.6);
}

.foot {
    margin-top: 48px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

@media (max-width: 640px) {
    .shell {
        padding: 32px 16px 48px;
    }

    .top {
        flex-direction: column;
        align-items: flex-start;
    }

    .top-meta {
        text-align: left;
    }

    .tool {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .tool-index {
        text-align: left;
    }

    .tool-go {
        justify-content: flex-start;
    }
}