/* ========== 凌淼贸易管理系统 - 全局样式 ========== */
:root {
  --primary: #6366f1;
  --primary-light: #eef2ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.6; }

/* ========== 通用组件 ========== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 4px; padding: 8px 16px; border-radius: 6px; font-size: 13px; font-weight: 500; cursor: pointer; border: 1px solid transparent; transition: all 0.2s; text-decoration: none; }
.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-outline { background: #fff; border-color: var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-xs { padding: 3px 8px; font-size: 11px; border-radius: 4px; }
.btn-block { display: flex; width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ========== 分页 ========== */
.pagination { display: flex; align-items: center; justify-content: center; gap: 4px; padding: 12px 0; flex-wrap: wrap; }
.pg-btn { display: inline-flex; align-items: center; justify-content: center; min-width: 32px; height: 32px; padding: 0 8px; border: 1px solid var(--border); border-radius: 6px; background: #fff; color: var(--text-secondary); font-size: 13px; cursor: pointer; transition: all 0.15s; user-select: none; }
.pg-btn:hover:not(:disabled):not(.active) { border-color: var(--primary); color: var(--primary); }
.pg-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }
.pg-btn[disabled] { opacity: 0.35; cursor: not-allowed; }
.pg-dots { display: inline-flex; align-items: center; justify-content: center; width: 32px; color: var(--text-muted); font-size: 14px; letter-spacing: 2px; }
.pg-jump { display: inline-flex; align-items: center; gap: 6px; margin-left: 12px; font-size: 12px; color: var(--text-muted); white-space: nowrap; }
.pg-input { width: 52px; height: 28px; padding: 2px 6px; border: 1px solid var(--border); border-radius: 4px; text-align: center; font-size: 12px; color: var(--text); }
.pg-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-light); }

.form-input, .form-select, textarea { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; color: var(--text); background: #fff; transition: border-color 0.2s; font-family: inherit; }
.form-input:focus, .form-select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.1); }
.form-group { margin-bottom: 12px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; padding-right: 30px; }
textarea { resize: vertical; min-height: 60px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.spinner { width: 30px; height: 30px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; margin: 0 auto; }
@keyframes spin { to { transform: rotate(360deg); } }

.card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 16px; }
.card-header { padding: 12px 16px; font-weight: 600; font-size: 14px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 8px; }
.card-body { padding: 16px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 12px; text-align: left; font-size: 13px; border-bottom: 1px solid var(--border); }
th { font-size: 11px; text-transform: uppercase; color: var(--text-muted); background: var(--bg); font-weight: 600; white-space: nowrap; }
tr:hover { background: var(--primary-light); }

.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 1000; display: flex; align-items: center; justify-content: center; animation: fadeIn 0.2s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal { background: #fff; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,0.2); width: 90%; max-width: 500px; max-height: 85vh; overflow-y: auto; }
.modal-dialog { background: #fff; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,0.2); max-height: 85vh; overflow-y: auto; }
.modal-lg { max-width: 700px; }
.modal-xl { max-width: 900px; }
.modal-header { padding: 16px 20px; font-weight: 600; font-size: 15px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-muted); padding: 4px; }
.modal-body { padding: 20px; }
.modal-footer { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
.empty-state .icon { font-size: 48px; margin-bottom: 12px; opacity: 0.5; }

#toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 10px 18px; border-radius: 8px; color: #fff; font-size: 13px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); animation: slideIn 0.3s; max-width: 360px; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); color: #4a2e00; }
.toast.info { background: var(--primary); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ========== 页面布局 ========== */
.page-content { padding: 16px 20px; }
.page-title { font-size: 20px; font-weight: 700; margin-bottom: 2px; }
.page-subtitle { font-size: 12px; color: var(--text-muted); margin-bottom: 16px; }
.toolbar { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }

/* ========== 分类选项卡 & 快速上传 ========== */
.cat-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.cat-tab { display: inline-block; padding: 5px 14px; border-radius: 16px; font-size: 12px; font-weight: 500; color: var(--text-secondary); background: #fff; border: 1px solid var(--border); cursor: pointer; transition: all 0.2s; user-select: none; }
.cat-tab:hover { border-color: var(--primary); color: var(--primary); }
.cat-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.quick-upload-panel { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin-bottom: 14px; }
.quick-upload-header { display: flex; gap: 12px; align-items: baseline; margin-bottom: 10px; }
.quick-upload-body { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-start; }
.quick-upload-body .sku-search-wrap { position: relative; min-width: 200px; flex: 1; }
.quick-upload-body .upload-dropzone { flex: 2; }

.sku-dropdown { position: absolute; top: 100%; left: 0; right: 0; z-index: 100; background: #fff; border: 1px solid var(--border); border-radius: 6px; max-height: 260px; overflow-y: auto; box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.sku-dd-item { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; cursor: pointer; font-size: 13px; border-bottom: 1px solid var(--border); }
.sku-dd-item:last-child { border-bottom: none; }
.sku-dd-item:hover { background: var(--primary-light); }
.sku-dd-code { font-weight: 600; color: var(--primary); min-width: 80px; }
.sku-dd-name { color: var(--text-secondary); flex: 1; margin: 0 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sku-dd-count { font-size: 11px; color: var(--text-muted); white-space: nowrap; }

.upload-dropzone { border: 2px dashed var(--border); border-radius: 8px; padding: 20px; text-align: center; cursor: pointer; transition: all 0.2s; background: #fafbfc; font-size: 13px; color: var(--text-muted); }
.upload-dropzone:hover, .upload-dropzone.drag-over { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }

/* ========== 登录 ========== */
/* 登录页默认可见（即使外部 JS 加载失败也能看到登录表单，登录逻辑为内联脚本） */
#login-page { display: flex; min-height: calc(100vh - 36px); align-items: center; justify-content: center; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.login-box { background: #fff; padding: 40px; border-radius: 16px; width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.login-logo { font-size: 40px; text-align: center; margin-bottom: 8px; }
.login-title { font-size: 26px; font-weight: 700; text-align: center; color: var(--text); }
.login-subtitle { text-align: center; color: var(--text-muted); font-size: 14px; margin-bottom: 24px; }
.login-error { background: #fef2f2; color: var(--danger); padding: 8px 12px; border-radius: 6px; font-size: 13px; margin-bottom: 12px; }
.btn-login { padding: 12px; font-size: 15px; font-weight: 600; border-radius: 8px; margin-top: 4px; }
.login-hint { text-align: center; margin-top: 16px; color: var(--text-muted); font-size: 12px; }
/* 主界面默认隐藏，由 JS 检测到有效登录后显示 */
#app-layout { display: none; width: 100%; min-height: 100vh; }
.sidebar { width: 220px; background: var(--card-bg); border-right: 1px solid var(--border); position: fixed; top: 0; left: 0; bottom: 36px; display: flex; flex-direction: column; z-index: 100; }
.sidebar-brand { padding: 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.brand-icon { font-size: 28px; }
.brand-name { font-weight: 700; font-size: 15px; color: var(--text); }
.brand-sub { font-size: 11px; color: var(--text-muted); }

.sidebar-nav { flex: 1; overflow-y: auto; padding: 8px 0; }
.nav-section { padding: 12px 20px 4px; font-size: 10px; text-transform: uppercase; color: var(--text-muted); font-weight: 700; letter-spacing: 0.5px; }
.nav-link { display: flex; align-items: center; gap: 10px; padding: 10px 20px; color: var(--text-secondary); text-decoration: none; font-size: 13px; transition: all 0.15s; cursor: pointer; }
.nav-link:hover { background: var(--bg); color: var(--text); }
.nav-link.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.nav-icon { font-size: 16px; width: 24px; text-align: center; }

.sidebar-footer { padding: 12px 16px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-size: 13px; }

.main-content { flex: 1; min-width: 0; margin-left: 220px; min-height: 100vh; padding-bottom: 36px; box-sizing: border-box; }
.content-header { padding: 16px 20px; background: var(--card-bg); border-bottom: 1px solid var(--border); }

/* ========== 统计卡片 ========== */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 16px; }
.stat-card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; display: flex; align-items: center; gap: 14px; cursor: pointer; transition: transform 0.2s; }
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.stat-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; }
.stat-val { font-size: 28px; font-weight: 700; color: var(--text); }
.stat-label { font-size: 12px; color: var(--text-muted); }

.quick-link { display: block; padding: 10px 14px; background: var(--bg); border-radius: 6px; text-decoration: none; color: var(--text); font-size: 13px; transition: all 0.2s; }
.quick-link:hover { background: var(--primary-light); color: var(--primary); }

/* ========== 产品卡片 ========== */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; width: 100%; }
.product-card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; cursor: pointer; transition: all 0.2s; }
.product-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.12); }
.pc-img { height: 140px; overflow: hidden; position: relative; background: #f1f5f9; }
.pc-img img { width: 100%; height: 100%; object-fit: cover; }
.pc-no-img { height: 100%; display: flex; align-items: center; justify-content: center; font-size: 40px; color: var(--text-muted); }
.pc-img-count { position: absolute; bottom: 4px; right: 4px; background: rgba(0,0,0,0.55); color: #fff; font-size: 10px; padding: 1px 5px; border-radius: 3px; }
.pc-info { padding: 8px 10px; }
.pc-sku { font-size: 11px; color: var(--primary); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pc-name { font-size: 12px; color: var(--text); margin-top: 1px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ========== 搜索卡片 ========== */
.search-result-card { cursor: pointer; }
.search-result-card .pc-img { height: 120px; }

/* ========== SKU 详情页 ========== */
.sku-detail-page { height: calc(100vh - 80px); display: flex; flex-direction: column; overflow: hidden; }
.sku-detail-layout { display: grid; grid-template-columns: 1fr 420px; gap: 20px; flex: 1; overflow: hidden; min-height: 0; }

/* 图片画廊 */
.sku-gallery { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; display: flex; flex-direction: column; overflow-y: auto; min-height: 0; }
.sku-gallery::-webkit-scrollbar { width: 6px; }
.sku-gallery::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
.sku-main-image { position: relative; background: #f1f5f9; border-radius: 8px; overflow: hidden; min-height: 300px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; cursor: zoom-in; }
.sku-main-image img { max-width: 100%; max-height: 500px; object-fit: contain; }
.sku-no-img { text-align: center; color: var(--text-muted); font-size: 18px; padding: 40px; }
.sku-main-overlay { position: absolute; bottom: 12px; right: 12px; display: flex; gap: 6px; opacity: 0; transition: opacity 0.2s; }
.sku-main-image:hover .sku-main-overlay { opacity: 1; }

/* ========== 页面底部备案信息栏（工信部要求，全站固定） ========== */
#site-footer {
  position: fixed; left: 0; right: 0; bottom: 0;
  height: 36px; line-height: 36px;
  text-align: center; font-size: 12px;
  background: #ffffff; color: #94a3b8;
  border-top: 1px solid #e2e8f0;
  box-shadow: 0 -1px 3px rgba(0,0,0,0.03);
  z-index: 200;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  padding: 0 12px;
}
#site-footer a { color: #94a3b8; text-decoration: none; }
#site-footer a:hover { color: #475569; text-decoration: underline; }
#site-footer .sep { color: #cbd5e1; margin: 0 8px; }

/* 缩略图 */
.sku-thumbnails { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 8px; }
.sku-thumbnail { position: relative; border: 2px solid transparent; border-radius: 6px; overflow: hidden; cursor: pointer; background: #f1f5f9; aspect-ratio: 1; }
.sku-thumbnail:hover { border-color: var(--primary); }
.sku-thumbnail.active { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.2); }
.sku-thumbnail img { width: 100%; height: 100%; object-fit: cover; }
.sku-thumbnail .thumb-badge { position: absolute; top: 2px; left: 2px; background: var(--primary); color: #fff; font-size: 9px; padding: 1px 5px; border-radius: 3px; }
.sku-thumbnail .thumb-delete { position: absolute; top: 2px; right: 2px; width: 18px; height: 18px; background: rgba(239,68,68,0.85); color: #fff; border: none; border-radius: 50%; font-size: 12px; line-height: 1; cursor: pointer; display: none; }
.sku-thumbnail .thumb-set-main { position: absolute; bottom: 2px; right: 2px; width: 18px; height: 18px; background: rgba(245,158,11,0.85); color: #fff; border: none; border-radius: 50%; font-size: 10px; line-height: 1; cursor: pointer; display: none; }
.sku-thumbnail:hover .thumb-delete, .sku-thumbnail:hover .thumb-set-main { display: flex; align-items: center; justify-content: center; }

/* SKU 信息区 */
.sku-info { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; overflow-y: auto; min-height: 0; }
.sku-info::-webkit-scrollbar { width: 6px; }
.sku-info::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
.sku-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }
.sku-specs h3 { font-size: 15px; font-weight: 600; margin-bottom: 14px; color: var(--text); }
.spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.spec-item label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 3px; text-transform: uppercase; }
.spec-item input, .spec-item textarea { width: 100%; padding: 6px 10px; border: 1px solid var(--border); border-radius: 5px; font-size: 13px; color: var(--text); background: #fafafa; }
.spec-item input:focus, .spec-item textarea:focus { border-color: var(--primary); background: #fff; outline: none; }

.stock-row { display: flex; align-items: center; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 13px; }

.similar-card { background: var(--card-bg); border-radius: 6px; overflow: hidden; box-shadow: var(--shadow); cursor: pointer; transition: transform 0.2s; }
.similar-card:hover { transform: translateY(-2px); }

/* ========== 仓库卡片 ========== */
.warehouse-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.wh-card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; transition: transform 0.2s; }
.wh-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.wh-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.wh-card-icon { font-size: 32px; width: 48px; height: 48px; background: var(--primary-light); border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.wh-card-name { font-weight: 600; font-size: 15px; color: var(--text); }
.wh-card-stats { display: flex; gap: 8px; margin-bottom: 12px; }
.wh-stat { flex: 1; text-align: center; background: var(--bg); border-radius: 6px; padding: 10px 6px; }
.wh-stat-val { font-size: 22px; font-weight: 700; color: var(--text); }
.wh-stat-label { font-size: 10px; color: var(--text-muted); margin-top: 2px; }
.wh-card-info { display: flex; flex-wrap: wrap; gap: 8px; font-size: 11px; color: var(--text-muted); margin-bottom: 12px; }
.wh-card-actions { display: flex; gap: 6px; }

/* ========== 以图搜图 ========== */
.image-search-zone { border: 2px dashed #c7d2fe; border-radius: 12px; padding: 40px 20px; text-align: center; cursor: pointer; transition: all 0.25s; background: #fafbff; }
.image-search-zone:hover { border-color: var(--primary); background: #eef2ff; }
.image-search-zone.drag-over { border-color: var(--primary); background: #e0e7ff; transform: scale(1.01); }
.image-search-zone .uz-icon { margin-bottom: 8px; }
.image-search-zone .uz-title { font-weight: 600; font-size: 16px; color: var(--text); margin-bottom: 6px; }
.image-search-zone .uz-hint { font-size: 12px; color: var(--text-muted); }

/* ========== 导入页 ========== */
#import-log { white-space: pre-wrap; word-break: break-all; }

/* ========== SKU 图片分组 ========== */
.sku-groups-container { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }

.sku-group-section { background: var(--bg); border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.sku-group-header { display: flex; align-items: center; gap: 8px; padding: 8px 12px; cursor: pointer; user-select: none; transition: background 0.15s; }
.sku-group-header:hover { background: #eef2ff; }
.sku-group-arrow { font-size: 10px; color: var(--text-muted); width: 14px; flex-shrink: 0; }
.sku-group-title { font-weight: 600; font-size: 13px; color: var(--text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sku-group-count { font-size: 11px; color: var(--text-muted); background: var(--card-bg); padding: 2px 8px; border-radius: 10px; white-space: nowrap; }
.sku-group-body { padding: 8px; border-top: 1px solid var(--border); }
.sku-group-body .sku-thumbnails { grid-template-columns: repeat(auto-fill, minmax(72px, 1fr)); gap: 6px; }

/* 缩略图悬停操作按钮 */
.sku-thumbnail .thumb-actions { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: space-between; padding: 2px; opacity: 0; transition: opacity 0.15s; pointer-events: none; }
.sku-thumbnail:hover .thumb-actions { opacity: 1; pointer-events: auto; }
.thumb-action { width: 20px; height: 20px; border: none; border-radius: 50%; font-size: 11px; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center; color: #fff; flex-shrink: 0; }
.thumb-action.set-thumb { background: rgba(245,158,11,0.85); }
.thumb-action.del { background: rgba(239,68,68,0.85); }
.thumb-action.set-thumb:hover { background: #f59e0b; }
.thumb-action.del:hover { background: #ef4444; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .sku-detail-layout { grid-template-columns: 1fr; }
  .warehouse-cards { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
  .stat-cards { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}
@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar .brand-name, .sidebar .brand-sub, .sidebar .nav-section, .nav-link span:not(.nav-icon), .sidebar-footer { display: none; }
  .nav-link { justify-content: center; padding: 12px; }
  .main-content { margin-left: 60px; }
  .form-row { grid-template-columns: 1fr; }
}