:root
{
    --bg: #0f1420;
    --bg-2: #161d2e;
    --card: #1b2335;
    --line: #2a3447;
    --ink: #e7ecf5;
    --dim: #9aa6bd;
    --accent: #5b9dff;
    --accent-2: #7bb0ff;
    --good: #57c98a;
    --warn: #ffcf7a;
    --bad: #ff8a73;
    --radius: 14px;
    color-scheme: dark;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body
{
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(180deg, #141b2b, var(--bg));
    color: var(--ink);
    font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

.wrap { width: 100%; max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }

a { color: var(--accent-2); }

.top { display: flex; align-items: center; gap: 10px; margin-bottom: 28px; }

.top .logo { width: 34px; height: 34px; }

.top h1 { font-size: 20px; margin: 0; font-weight: 650; letter-spacing: -0.01em; }

.top .sub { color: var(--dim); font-size: 14px; }

.lead { color: var(--dim); font-size: 17px; margin: 0 0 24px; }

h2.page-title { font-size: 26px; font-weight: 680; letter-spacing: -0.02em; margin: 0 0 6px; }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }

.tool-card
{
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px;
    transition: border-color 0.15s, transform 0.15s;
}

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

.tool-card .icon { font-size: 26px; }

.tool-card h3 { margin: 10px 0 4px; font-size: 18px; font-weight: 640; }

.tool-card p { margin: 0; color: var(--dim); font-size: 14px; }

.tool-card.soon { opacity: 0.55; pointer-events: none; }

.back { display: inline-block; color: var(--dim); text-decoration: none; font-size: 14px; margin-bottom: 18px; }

.back:hover { color: var(--ink); }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }

.drop
{
    display: block;
    border: 2px dashed var(--line);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    background: rgba(255, 255, 255, 0.015);
}

.drop:hover, .drop.over { border-color: var(--accent); background: rgba(91, 157, 255, 0.07); }

.drop * { pointer-events: none; }

.drop .big { font-size: 34px; }

.drop .hint { color: var(--dim); font-size: 14px; margin-top: 8px; }

.drop input { display: none; }

.btn
{
    appearance: none;
    border: 0;
    border-radius: 10px;
    background: linear-gradient(180deg, var(--accent-2), var(--accent));
    color: #06142e;
    font: inherit;
    font-weight: 650;
    padding: 12px 20px;
    cursor: pointer;
}

.btn:disabled { filter: grayscale(0.5) brightness(0.7); cursor: default; }

.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.result { margin-top: 18px; border-radius: var(--radius); padding: 16px; border: 1px solid var(--line); background: var(--bg-2); }

.result.good { border-color: rgba(87, 201, 138, 0.5); }

.result.warn { border-color: rgba(255, 207, 122, 0.5); }

.result.bad { border-color: rgba(255, 138, 115, 0.5); }

.result h3 { margin: 0 0 6px; font-size: 17px; }

.result .tag { display: inline-block; font-size: 13px; color: var(--dim); background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; margin: 4px 6px 0 0; }

.muted { color: var(--dim); }

.small { font-size: 14px; }

.note { font-size: 14px; color: var(--dim); background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-top: 20px; }

.note b { color: var(--ink); }

.spinner { width: 18px; height: 18px; border: 2px solid rgba(255, 255, 255, 0.25); border-top-color: var(--ink); border-radius: 50%; display: inline-block; animation: spin 0.7s linear infinite; vertical-align: -3px; }

@keyframes spin { to { transform: rotate(360deg); } }

.filename { font-weight: 600; word-break: break-all; }