/* ===== Global Styles ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #0f0f1a;
  --bg2: #1a1a2e;
  --bg3: #16213e;
  --card: #1e1e36;
  --border: #2a2a4a;
  --accent: #7c3aed;
  --accent2: #a855f7;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --success: #22c55e;
  --error: #ef4444;
  --warn: #f59e0b;
  --radius: 12px;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}
a { color: var(--accent2); text-decoration: none; }
a:hover { color: var(--accent); }

/* ===== Header ===== */
.header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo { font-size: 20px; font-weight: 700; }
.logo span { color: var(--accent2); }
.header-nav a { margin-left: 20px; color: var(--text2); font-size: 14px; }
.header-nav a:hover { color: var(--accent2); }

/* ===== Container ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

/* ===== Tool Card Grid ===== */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.3s;
  cursor: pointer;
}
.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(124,58,237,0.15);
}
.tool-card .icon { font-size: 36px; margin-bottom: 12px; }
.tool-card h3 { font-size: 18px; margin-bottom: 8px; }
.tool-card p { color: var(--text2); font-size: 14px; }

/* ===== Tool Page Layout ===== */
.tool-page { max-width: 900px; margin: 0 auto; padding: 24px; }
.tool-title { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.tool-desc { color: var(--text2); margin-bottom: 24px; font-size: 15px; }

/* ===== Form Elements ===== */
textarea, input[type="text"], input[type="number"], select {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 12px 16px;
  font-size: 14px;
  font-family: "Fira Code", "Consolas", monospace;
  resize: vertical;
}
textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}
textarea { min-height: 160px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent2); }
.btn-secondary { background: var(--bg3); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); }
.btn-success { background: var(--success); color: #fff; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; }

/* ===== Code Output ===== */
.output-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-family: "Fira Code", "Consolas", monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 120px;
  max-height: 400px;
  overflow-y: auto;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--accent);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 999;
  animation: fadeInUp 0.3s;
}
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .container { padding: 16px; }
  .tool-grid { grid-template-columns: 1fr; }
  .header { padding: 12px 16px; }
  .tool-title { font-size: 22px; }
  .tool-page { padding: 16px; }
  /* iOS 聚焦输入框时会自动放大页面，字号 >=16px 可避免 */
  textarea, input[type="text"], input[type="number"], input[type="date"], select { font-size: 16px; }
  .btn { padding: 12px 18px; }              /* 移动端更易点击 */
  .btn-group .btn { flex: 1 1 auto; justify-content: center; }
  .info-table td, .info-table th { padding: 7px 8px; font-size: 13px; }
  .output-box { font-size: 13px; }
  .footer { padding: 24px 16px; margin-top: 40px; }
}
/* 表格容器横向滚动时的触摸惯性 */
.info-table { -webkit-overflow-scrolling: touch; }
input[type="date"] {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 12px 16px;
  font-size: 14px;
}
input[type="date"]:focus { outline: none; border-color: var(--accent); }

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 32px;
  color: var(--text2);
  font-size: 13px;
  border-top: 1px solid var(--border);
  margin-top: 60px;
}
.footer a { color: var(--text2); }

/* ===== Section ===== */
.section { margin: 32px 0; }
.section h2 { font-size: 20px; margin-bottom: 16px; }

/* ===== Table ===== */
.info-table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.info-table td, .info-table th {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
  font-size: 14px;
}
.info-table th { background: var(--bg3); color: var(--text2); }