:root {
  --bg: #f6f8fc;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --brand: #4f46e5;
  --brand2: #06b6d4;
  --line: #e5e7eb;
  --ok: #16a34a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

/* Nav */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: 1040px; margin: 0 auto;
}
.brand { font-weight: 800; font-size: 20px; color: var(--brand); }
.brand .dot { color: var(--brand2); }
.brand small { font-weight: 500; color: var(--muted); font-size: 12px; margin-left: 6px; }
.nav nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 14px; }
.nav nav a:hover { color: var(--brand); }

/* Hero */
.hero { text-align: center; padding: 36px 20px 12px; }
.hero h1 { font-size: 34px; margin: 0 0 10px; letter-spacing: -0.5px; }
.hero .sub { color: var(--muted); margin: 0 auto 16px; max-width: 620px; }
.hero .sub b { color: var(--brand); }
.badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.badges span {
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 14px; font-size: 13px; color: var(--ink);
}

/* Panel */
.panel {
  max-width: 820px; margin: 24px auto; background: var(--card);
  border: 1px solid var(--line); border-radius: 18px; padding: 24px;
  box-shadow: 0 10px 30px rgba(31, 41, 55, 0.05);
}
.drop {
  border: 2px dashed #c7cdd6; border-radius: 14px; padding: 40px 20px;
  text-align: center; cursor: pointer; transition: .15s; background: #fafbff;
}
.drop.drag { border-color: var(--brand); background: #eef0ff; }
.drop-icon { font-size: 40px; }
.drop-title { font-size: 16px; margin: 8px 0 2px; }
.drop-title .link { color: var(--brand); text-decoration: underline; }
.drop-hint { color: var(--muted); font-size: 13px; margin: 0; }

.controls {
  display: flex; gap: 16px; align-items: flex-end; flex-wrap: wrap;
  margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line);
}
.ctrl { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.ctrl select, .ctrl input[type=range] { min-width: 180px; }
select {
  padding: 9px 10px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 14px; color: var(--ink); background: #fff;
}
input[type=range] { accent-color: var(--brand); }

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: #fff; border: none; border-radius: 10px; padding: 11px 22px;
  font-size: 15px; font-weight: 600; cursor: pointer; transition: .15s;
}
.btn-primary:hover { opacity: .92; transform: translateY(-1px); }
.btn-ghost {
  background: #fff; border: 1px solid var(--brand); color: var(--brand);
  border-radius: 10px; padding: 10px 18px; font-weight: 600; cursor: pointer;
}
.queue { color: var(--muted); font-size: 13px; margin: 14px 0 0; }

/* Stats */
.stats {
  max-width: 820px; margin: 18px auto 0; text-align: center; font-weight: 600;
  color: var(--ok); background: #ecfdf5; border: 1px solid #bbf7d0;
  border-radius: 12px; padding: 12px;
}

/* Results */
.results {
  max-width: 1040px; margin: 22px auto; display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; padding: 0 16px;
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; display: flex; flex-direction: column;
}
.thumb { width: 100%; height: 150px; object-fit: cover; background: #f1f5f9; }
.meta { padding: 12px; }
.fname { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sizes { font-size: 12px; color: var(--muted); margin: 6px 0 10px; }
.badge { background: #dcfce7; color: var(--ok); border-radius: 6px; padding: 1px 6px; margin-left: 4px; }
.dl {
  display: inline-block; background: var(--brand); color: #fff; text-decoration: none;
  border-radius: 8px; padding: 7px 14px; font-size: 13px; font-weight: 600;
}
.dl:hover { opacity: .9; }

.dl-all { text-align: center; margin: 8px auto 28px; }

/* Ad / upsell */
.ad-note, .upsell {
  max-width: 820px; margin: 22px auto; background: var(--card);
  border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; text-align: center;
}
.upsell h2 { margin: 0 0 8px; font-size: 18px; }
.upsell p { color: var(--muted); font-size: 14px; margin: 0; }
.upsell a { color: var(--brand); }

/* Footer */
.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 30px 16px; }
.foot .links a { color: var(--brand); text-decoration: none; margin: 0 4px; }

@media (max-width: 600px) {
  .hero h1 { font-size: 26px; }
  .controls { flex-direction: column; align-items: stretch; }
  .ctrl select, .ctrl input[type=range] { min-width: 0; width: 100%; }
}