:root {
  --bg0: #f5f8ff;
  --bg1: #d9e9ff;
  --card: #ffffff;
  --ink: #11213a;
  --sub: #4b5f7e;
  --acc: #1f6feb;
  --ok: #067647;
  --err: #b42318;
  --line: #dbe6f7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  min-height: 100vh;
  background: radial-gradient(circle at 10% 10%, var(--bg1) 0, transparent 45%),
    linear-gradient(160deg, #fdfefe, var(--bg0));
}

.container {
  width: min(920px, 92vw);
  margin: 30px auto;
  display: grid;
  gap: 16px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.3rem, 2vw, 2rem);
}

.hero p {
  margin: 8px 0 0;
  color: var(--sub);
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}

.drop {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 8px;
  border: 2px dashed #9bb8e7;
  border-radius: 12px;
  padding: 36px 12px;
  cursor: pointer;
  transition: 0.2s border-color, 0.2s background-color;
}

.drop:hover,
.drop.active {
  border-color: var(--acc);
  background: #eef5ff;
}

.drop small {
  color: var(--sub);
}

.actions {
  margin-top: 12px;
  display: flex;
  gap: 12px;
  align-items: center;
}

button {
  border: 0;
  background: var(--acc);
  color: #fff;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}

button[disabled] {
  cursor: not-allowed;
  opacity: 0.5;
}

#status {
  color: var(--sub);
}

#status.ok {
  color: var(--ok);
}

#status.err {
  color: var(--err);
}

.result-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.result-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.file-meta {
  display: grid;
  gap: 4px;
}

.file-name {
  font-weight: 600;
  overflow-wrap: anywhere;
}

.file-sub {
  color: var(--sub);
  font-size: 0.9rem;
}