:root {
  --bg: #eef1f7;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #8a90a3;
  --border: #e7eaf1;
  --accent: #4f6ef7;
  --accent-2: #7a5cf0;
  --danger: #e5484d;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(31, 45, 80, 0.08);
  --shadow-lg: 0 18px 50px rgba(31, 45, 80, 0.12);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 500px at 15% -10%, #dbe3ff 0%, transparent 60%),
    radial-gradient(1000px 500px at 110% 5%, #f0e2ff 0%, transparent 55%),
    linear-gradient(160deg, #eef1f7 0%, #e8ecf6 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  display: flex;
  align-items: baseline;
  gap: 14px;
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 20px 8px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.topbar .sub {
  color: var(--muted);
  font-size: 13px;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 16px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  transition: box-shadow 0.25s ease;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.card-head h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 650;
}

.head-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.muted { color: var(--muted); font-size: 13px; }
.small { font-size: 12px; }

textarea {
  width: 100%;
  min-height: 260px;
  resize: vertical;
  padding: 14px;
  font: inherit;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  background: #f8f9fd;
  border: 1px solid var(--border);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.15);
  background: #fff;
}

.hint { margin-top: 8px; color: var(--muted); font-size: 12px; }

.btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 8px 14px;
  font: inherit;
  font-size: 13px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.btn:hover { border-color: #cdd3e2; background: #f5f7fb; }
.btn:active { transform: translateY(1px); }

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 16px rgba(79, 110, 247, 0.28);
}

.btn.primary:hover { filter: brightness(1.05); background: linear-gradient(135deg, var(--accent), var(--accent-2)); }

.btn.sm { padding: 6px 10px; font-size: 12px; }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); background: #fff1f1; }

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 30px 20px;
  border: 2px dashed #cdd5e8;
  border-radius: 12px;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.dropzone:hover, .dropzone.over {
  border-color: var(--accent);
  background: #f6f8ff;
  color: var(--accent);
}

.dropzone svg { color: var(--accent); opacity: 0.85; }

.dz-text { font-size: 14px; font-weight: 550; color: var(--text); }

.file-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.file-list .empty {
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  padding: 14px 0;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fbfcfe;
  transition: background 0.15s;
}

.file-item:hover { background: #f6f8ff; }

.thumb {
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #eef1f8;
}

.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.thumb.generic span {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.file-item .info { flex: 1; min-width: 0; }

.file-item .name {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item .name:hover { color: var(--accent); }

.file-item .meta { font-size: 12px; color: var(--muted); margin-top: 2px; }

.file-item .actions {
  display: flex;
  gap: 6px;
  flex: 0 0 auto;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%) translateY(20px);
  background: #2b3140;
  color: #fff;
  padding: 11px 20px;
  font-size: 13px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 50;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--danger); }

.create-bar { display: flex; gap: 10px; margin-top: 4px; }

.btn.big { padding: 12px 26px; font-size: 15px; }

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

.result-url {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 14px;
  color: var(--accent);
  background: #f6f8ff;
  border: 1px solid var(--border);
  padding: 9px 12px;
  border-radius: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-decoration: none;
}

pre#viewText {
  margin: 0;
  min-height: 200px;
  padding: 14px;
  font: inherit;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  background: #f8f9fd;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.empty-state {
  text-align: center;
  padding: 44px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.big-text { font-size: 16px; font-weight: 600; color: var(--muted); }

/* 页脚 */
.footer {
  margin-top: 32px;
  padding: 16px 0 8px;
  text-align: center;
  font-size: 12px;
  color: #9aa0a6;
  border-top: 1px solid #eef0f2;
}

.footer a {
  color: #9aa0a6;
  text-decoration: none;
}

.footer a:hover {
  color: #fb7299;
}

@media (max-width: 640px) {
  .topbar { flex-direction: column; gap: 4px; padding-top: 24px; }
  .card { padding: 16px; }
  .card-head { flex-direction: column; align-items: flex-start; }
  .head-actions { width: 100%; flex-wrap: wrap; }
  .file-item { flex-wrap: wrap; }
  .file-item .actions { width: 100%; justify-content: flex-end; }
}