:root {
  --bg: #0f1220;
  --bg-card: #181c30;
  --bg-input: #0f1220;
  --border: #262c48;
  --text: #e8e8f0;
  --text-dim: #b8bdd6;
  --text-muted: #6f7596;
  --primary: #4a5aa8;
  --primary-hover: #5b6cc4;
  --btn: #2d3557;
  --btn-hover: #3a4470;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding: 16px;
  min-height: 100vh;
}

.app { max-width: 640px; margin: 0 auto; }

.app-header { text-align: center; padding: 16px 0 20px; }
.app-header h1 { font-size: 30px; font-weight: 700; letter-spacing: 2px; }
.subtitle { font-size: 13px; color: var(--text-muted); letter-spacing: 3px; text-transform: uppercase; margin-top: 2px; }

.screen { animation: fadeIn 0.2s ease; }
.screen.hidden { display: none; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}

.card-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.btn {
  display: inline-block;
  background: var(--btn);
  color: var(--text);
  border: 1px solid #3d4773;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
  margin: 4px 4px 4px 0;
}

.btn:hover { background: var(--btn-hover); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--primary); border-color: var(--primary-hover); }
.btn.primary:hover { background: var(--primary-hover); }

.btn-grid { display: flex; flex-wrap: wrap; gap: 4px; }

input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #3d4773;
  background: var(--bg-input);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  margin-bottom: 8px;
  outline: none;
  transition: border-color 0.15s;
}

input[type="text"]:focus { border-color: var(--primary-hover); }

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

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-dim);
}

.stat-row b { color: var(--text); font-weight: 600; }

/* 创建界面 */
.form-group { margin-bottom: 16px; }
.form-group > label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.chip-group { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid #3d4773;
  background: var(--btn);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.15s;
  user-select: none;
}

.chip:hover { background: var(--btn-hover); }
.chip.active {
  background: var(--primary);
  border-color: var(--primary-hover);
  color: #fff;
}

.date-row { display: flex; gap: 8px; }
.date-row select {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #3d4773;
  background: var(--bg-input);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  cursor: pointer;
}

.date-row select:focus { border-color: var(--primary-hover); }

/* 日志 */
.log {
  max-height: 240px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

.log-item { padding: 6px 0; border-bottom: 1px dashed #232842; }
.log-item:last-child { border-bottom: none; }
.log-item.sys { color: var(--text-muted); font-style: italic; }
.log-time { color: var(--text-muted); font-size: 11px; margin-right: 8px; }

.log::-webkit-scrollbar { width: 6px; }
.log::-webkit-scrollbar-thumb { background: #2d3557; border-radius: 3px; }
.log::-webkit-scrollbar-track { background: transparent; }

@media (max-width: 480px) {
  body { padding: 12px; }
  .app-header h1 { font-size: 26px; }
  .btn { flex: 1 1 auto; text-align: center; }
  .date-row select { font-size: 13px; padding: 8px; }
}