/* ============================================================
   ROM资源分享站 全局样式
   主色调：蓝色，圆角卡片，轻阴影，过渡动画，移动端自适应单列布局
   ============================================================ */

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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #f3f4f6;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 10px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- 头部 ---------- */
.header {
  background: var(--primary);
  color: #fff;
  padding: 16px 0;
  box-shadow: var(--shadow);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.logo { font-size: 22px; font-weight: 700; }
.back-btn {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: none;
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}
.back-btn:hover { background: rgba(255,255,255,0.35); }

.search-box {
  display: flex;
  gap: 8px;
  flex: 1;
  max-width: 420px;
}
.search-box input {
  flex: 1;
  padding: 10px 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
}
.search-box button {
  padding: 10px 20px;
  background: var(--primary-dark);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}
.search-box button:hover { background: #1e40af; }

/* ---------- 分类导航 ---------- */
.categories {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.category-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.category-tag {
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}
.category-tag.active,
.category-tag:hover {
  background: var(--primary);
  color: #fff;
}

/* ---------- ROM卡片网格 ---------- */
.rom-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding: 24px 0;
}
.rom-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.rom-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 14px rgba(0,0,0,0.12);
}
.rom-card .card-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}
.rom-card .card-meta {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 4px;
}
.rom-card .card-price {
  margin-top: 10px;
  font-weight: 700;
}
.price-free { color: #16a34a; }
.price-paid { color: #dc2626; }

.empty-tip, .loading-tip {
  text-align: center;
  color: var(--text-light);
  padding: 40px 0;
}

/* ---------- 详情页 ---------- */
.detail-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin: 24px 0;
}
.detail-card h2 { font-size: 24px; margin-bottom: 16px; }
.detail-card .detail-row {
  display: flex;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.detail-card .detail-label {
  width: 100px;
  color: var(--text-light);
  flex-shrink: 0;
}
.detail-card .detail-value { flex: 1; word-break: break-all; }
.detail-card .detail-desc {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  white-space: pre-wrap;
}

/* ---------- 验证区 ---------- */
.verify-section {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}
.verify-section h3 { margin-bottom: 16px; }
.verify-label { font-size: 14px; color: var(--text-light); margin-bottom: 8px; }

.slider-wrap { margin: 16px 0; }
.slider-track {
  position: relative;
  height: 44px;
  background: #eef2f7;
  border-radius: 22px;
  overflow: hidden;
  user-select: none;
}
.slider-progress {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 0;
  background: var(--primary-light);
  transition: width 0.1s;
}
.slider-handle {
  position: absolute;
  left: 0; top: 0;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  font-size: 18px;
  z-index: 2;
  transition: left 0.1s;
}
.slider-handle.dragging { cursor: grabbing; transition: none; }
.slider-handle.success { background: #16a34a; cursor: default; }
.slider-text {
  position: absolute;
  left: 0; right: 0;
  text-align: center;
  line-height: 44px;
  color: var(--text-light);
  font-size: 14px;
  pointer-events: none;
}

.download-btn {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s;
}
.download-btn:hover:not(:disabled) { background: var(--primary-dark); }
.download-btn:disabled { background: #9ca3af; cursor: not-allowed; }

.download-result {
  margin-top: 16px;
  padding: 14px;
  border-radius: var(--radius);
  font-size: 14px;
  display: none;
}
.download-result.success { background: #dcfce7; color: #166534; display: block; }
.download-result.paid { background: #fef3c7; color: #92400e; display: block; }
.download-result.error { background: #fee2e2; color: #991b1b; display: block; }
.download-result a { color: var(--primary-dark); font-weight: 700; word-break: break-all; }

/* ---------- 后台 ---------- */
.admin-wrap { padding: 30px 16px; }
.admin-wrap h2 { margin-bottom: 20px; }
.admin-login {
  display: flex;
  gap: 8px;
  max-width: 400px;
  margin-bottom: 24px;
}
.admin-login input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
}
.admin-login button {
  padding: 10px 20px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
}
.admin-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.tab-btn {
  padding: 8px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
}
.tab-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.admin-form {
  background: var(--card-bg);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.admin-form label {
  display: flex;
  flex-direction: column;
  font-size: 13px;
  color: var(--text-light);
  gap: 4px;
}
.admin-form input, .admin-form textarea, .admin-form select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  font-family: inherit;
}
.admin-form textarea { min-height: 60px; resize: vertical; }
.form-actions { grid-column: 1 / -1; display: flex; gap: 8px; }
.form-actions button {
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
}
.form-actions button[type="submit"] { background: var(--primary); color: #fff; }
.form-actions button[type="button"] { background: var(--bg); border: 1px solid var(--border); }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 13px;
}
.admin-table th, .admin-table td {
  padding: 10px;
  border: 1px solid var(--border);
  text-align: left;
}
.admin-table th { background: var(--primary-light); color: var(--primary-dark); }
.admin-table td { word-break: break-all; }
.admin-table .op-btn {
  padding: 4px 10px;
  margin-right: 4px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}
.op-edit { background: var(--primary); color: #fff; }
.op-del { background: #dc2626; color: #fff; }

/* ---------- 页脚 ---------- */
.footer {
  text-align: center;
  color: var(--text-light);
  font-size: 13px;
  padding: 30px 16px;
}

/* ---------- 移动端适配（单列布局） ---------- */
@media (max-width: 600px) {
  .header-inner { flex-direction: column; align-items: stretch; }
  .search-box { max-width: 100%; }
  .rom-grid { grid-template-columns: 1fr; }
  .admin-form { grid-template-columns: 1fr; }
  .admin-table { font-size: 12px; }
  .admin-table th, .admin-table td { padding: 6px; }
}