/* ================================================================
   小鱼健康平台 v2.0 — 现代化设计系统
   幼儿园体适能平台 · 温暖的专业工具
   ================================================================ */

/* ── Design Tokens ── */
:root {
  /* Palette */
  --bg:        #f0f4ff;
  --bg-alt:    #f8fafc;
  --card:      #ffffff;
  --card-hover:#fafbff;
  --text:      #1e293b;
  --text-dim:  #64748b;
  --muted:     #94a3b8;
  --primary:   #6366f1;
  --primary-l: #818cf8;
  --primary-d: #4f46e5;
  --primary-s: #eef2ff;
  --accent:    #f59e0b;
  --accent-s:  #fffbeb;
  --success:   #10b981;
  --success-s: #ecfdf5;
  --danger:    #ef4444;
  --danger-s:  #fef2f2;
  --warning:   #f59e0b;
  --warning-s: #fffbeb;
  --border:    #e2e8f0;
  --border-l:  #f1f5f9;
  --glass-bg:  rgba(255,255,255,0.72);
  --glass-bd:  rgba(255,255,255,0.85);

  /* Spacing */
  --sp-xs: 4px;
  --sp-sm: 8px;
  --sp-md: 12px;
  --sp-lg: 16px;
  --sp-xl: 20px;
  --sp-2xl:24px;
  --sp-3xl:32px;
  --sp-4xl:40px;

  /* Radius */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 20px;
  --r-pill: 999px;

  /* Shadows */
  --sh-sm: 0 1px 2px rgba(0,0,0,0.04);
  --sh-md: 0 4px 12px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.04);
  --sh-lg: 0 12px 32px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.03);
  --sh-xl: 0 20px 60px rgba(0,0,0,0.10);

  /* Transitions */
  --t-fast: 0.15s ease;
  --t-base: 0.25s ease;
  --t-slow: 0.4s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset & Base ── */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  font-size:15px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}

/* ── Scrollbar ── */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:#94a3b8}

/* ================================================================
   TOPBAR
   ================================================================ */
.topbar{
  position:sticky;top:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  gap:var(--sp-lg);
  padding:14px 24px;
  background:rgba(240,244,255,0.82);
  backdrop-filter:saturate(180%) blur(24px);
  -webkit-backdrop-filter:saturate(180%) blur(24px);
  border-bottom:1px solid rgba(99,102,241,0.08);
}
.topbar::after{
  content:'';position:absolute;bottom:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(99,102,241,0.15),transparent);
}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{
  width:36px;height:36px;
  border-radius:var(--r-md);
  background:linear-gradient(135deg,#6366f1,#818cf8);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;color:#fff;
  box-shadow:0 2px 8px rgba(99,102,241,0.3);
  overflow:hidden;
}
.brand-logo img{
  width:100%;height:100%;
  object-fit:cover;display:block;
}
.brand-title{
  font-weight:700;font-size:18px;
  color:var(--text);
  letter-spacing:-0.02em;
  background:linear-gradient(135deg,#6366f1,#4f46e5);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.brand-subtitle{font-size:11px;color:var(--muted);margin-top:-2px}

.nav{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.nav a,.nav span{
  padding:6px 14px;border-radius:var(--r-pill);
  color:var(--text-dim);font-size:13px;font-weight:500;
  transition:all var(--t-fast);
  cursor:pointer;
}
.nav a:hover,.nav span:hover{
  background:rgba(99,102,241,0.08);
  color:var(--primary);
}
.nav a.active,.nav span.active{
  background:var(--primary-s);
  color:var(--primary);
  font-weight:600;
}
.nav .user-pill{
  display:flex;align-items:center;gap:6px;
  padding:5px 14px 5px 5px;
  border-radius:var(--r-pill);
  background:rgba(99,102,241,0.06);
}
.nav .user-avatar{
  width:30px;height:30px;
  border-radius:50%;
  background:linear-gradient(135deg,#818cf8,#6366f1);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:13px;font-weight:600;
}

/* ================================================================
   LAYOUT
   ================================================================ */
.container{
  width:min(1200px,calc(100vw - 32px));
  margin:0 auto;
  padding:var(--sp-2xl) var(--sp-lg);
}

/* Admin sidebar layout */
.admin-layout{
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  gap:var(--sp-xl);
  align-items:start;
}
.admin-sidebar{
  position:sticky;top:80px;
  background:var(--card);
  border-radius:var(--r-lg);
  padding:var(--sp-lg);
  box-shadow:var(--sh-md);
}
.admin-sidebar .nav-item{
  display:flex;align-items:center;gap:var(--sp-sm);
  padding:10px 14px;border-radius:var(--r-md);
  color:var(--text-dim);font-size:14px;font-weight:500;
  transition:all var(--t-fast);
  cursor:pointer;
  margin-bottom:2px;
}
.admin-sidebar .nav-item:hover{
  background:var(--primary-s);
  color:var(--primary);
}
.admin-sidebar .nav-item.active{
  background:var(--primary-s);
  color:var(--primary);
  font-weight:600;
}
.admin-sidebar .nav-icon{
  width:20px;text-align:center;font-size:16px;
}

.admin-main{min-width:0}

/* ================================================================
   CARDS
   ================================================================ */
.card{
  background:var(--card);
  border:1px solid var(--border-l);
  border-radius:var(--r-lg);
  padding:var(--sp-2xl);
  box-shadow:var(--sh-sm);
  transition:box-shadow var(--t-base),border-color var(--t-base);
  margin-bottom:var(--sp-xl);
}
.card:hover{
  box-shadow:var(--sh-md);
  border-color:var(--border);
}
.card-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:var(--sp-lg);
  padding-bottom:var(--sp-md);
  border-bottom:1px solid var(--border-l);
}
.card-title{
  font-size:16px;font-weight:600;
  color:var(--text);
  display:flex;align-items:center;gap:var(--sp-sm);
}
.card-title .icon{
  width:32px;height:32px;
  border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;
}

/* ================================================================
   STATS CARDS (概览卡片)
   ================================================================ */
.stats-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:var(--sp-lg);
  margin-bottom:var(--sp-xl);
}
.stat-card{
  background:var(--card);
  border:1px solid var(--border-l);
  border-radius:var(--r-lg);
  padding:var(--sp-xl) var(--sp-2xl);
  box-shadow:var(--sh-sm);
  display:flex;align-items:center;gap:var(--sp-lg);
  transition:all var(--t-base);
  cursor:default;
}
.stat-card:hover{
  box-shadow:var(--sh-md);
  transform:translateY(-1px);
}
.stat-icon{
  width:48px;height:48px;
  border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;
  flex-shrink:0;
}
.stat-icon.blue{background:var(--primary-s);color:var(--primary)}
.stat-icon.amber{background:var(--accent-s);color:var(--accent)}
.stat-icon.green{background:var(--success-s);color:var(--success)}
.stat-icon.red{background:var(--danger-s);color:var(--danger)}
.stat-info{min-width:0}
.stat-number{
  font-size:28px;font-weight:700;
  color:var(--text);
  letter-spacing:-0.02em;
  line-height:1.2;
}
.stat-label{
  font-size:12px;color:var(--muted);
  margin-top:2px;
  text-transform:uppercase;
  letter-spacing:0.04em;
}

/* ================================================================
   TAB NAVIGATION
   ================================================================ */
.tab-bar{
  display:flex;gap:0;
  background:var(--card);
  border-radius:var(--r-lg);
  padding:4px;
  box-shadow:var(--sh-sm);
  margin-bottom:var(--sp-xl);
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
.tab-btn{
  flex:1;min-width:0;
  padding:10px 20px;
  border:none;border-radius:var(--r-md);
  background:transparent;
  color:var(--text-dim);
  font-size:14px;font-weight:500;
  cursor:pointer;
  transition:all var(--t-fast);
  white-space:nowrap;
  font-family:inherit;
  display:flex;align-items:center;justify-content:center;
  gap:6px;
}
.tab-btn:hover{color:var(--text)}
.tab-btn.active{
  background:var(--primary);
  color:#fff;
  box-shadow:0 2px 8px rgba(99,102,241,0.3);
}
.tab-panel{display:none}
.tab-panel.active{display:block}
.tab-badge{
  font-size:11px;
  padding:1px 7px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,0.25);
  font-weight:600;
}

/* ================================================================
   COLLAPSIBLE / ACCORDION
   ================================================================ */
.collapse-trigger{
  display:flex;align-items:center;gap:var(--sp-sm);
  cursor:pointer;
  user-select:none;
  padding:var(--sp-sm) 0;
  transition:color var(--t-fast);
  font-size:15px;font-weight:600;
  color:var(--text);
}
.collapse-trigger:hover{color:var(--primary)}
.collapse-arrow{
  width:20px;height:20px;
  display:flex;align-items:center;justify-content:center;
  transition:transform var(--t-slow);
  font-size:12px;color:var(--muted);
}
.collapse-trigger.open .collapse-arrow{transform:rotate(90deg)}
.collapse-body{
  overflow:hidden;
  max-height:0;
  opacity:0;
  transition:max-height var(--t-slow),opacity var(--t-base),margin var(--t-slow);
  margin-top:0;
}
.collapse-body.open{
  max-height:3000px;
  opacity:1;
  margin-top:var(--sp-md);
}

/* ================================================================
   MODERN TABLE
   ================================================================ */
.table-wrap{
  overflow-x:auto;
  border-radius:var(--r-md);
  border:1px solid var(--border-l);
  -webkit-overflow-scrolling:touch;
  /* Scroll shadow hint */
  background:
    linear-gradient(to right, #fff 30%, transparent),
    linear-gradient(to left, #fff 30%, transparent),
    radial-gradient(at 0 50%, rgba(0,0,0,0.06), transparent 70%),
    radial-gradient(at 100% 50%, rgba(0,0,0,0.06), transparent 70%);
  background-repeat:no-repeat;
  background-size:40px 100%,40px 100%,14px 100%,14px 100%;
  background-attachment:local,local,scroll,scroll;
  background-position:0 0,100% 0,0 0,100% 0;
}
.data-table{
  width:100%;min-width:820px;
  border-collapse:collapse;
  font-size:13px;
  white-space:nowrap;
}
.data-table thead{position:sticky;top:0;z-index:2}
.data-table th{
  background:#f8fafc;
  color:var(--text-dim);
  font-weight:600;
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:0.03em;
  padding:12px 14px;
  text-align:left;
  border-bottom:2px solid var(--border);
  white-space:nowrap;
}
.data-table td{
  padding:10px 14px;
  border-bottom:1px solid var(--border-l);
  color:var(--text);
}
.data-table tbody tr{
  transition:background var(--t-fast);
}
.data-table tbody tr:nth-child(even){background:#f8fafc}
.data-table tbody tr:hover{background:#eef2ff}
/* Frozen first column */
.data-table th:first-child,
.data-table td:first-child{
  position:sticky;left:0;z-index:1;
  background:#fff;
  box-shadow:2px 0 4px rgba(0,0,0,0.03);
}
.data-table thead th:first-child{
  background:#f8fafc;z-index:3;
}
.data-table tbody tr:nth-child(even) td:first-child{background:#f8fafc}
.data-table tbody tr:hover td:first-child{background:#eef2ff}

/* ================================================================
   BUTTONS
   ================================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:6px;
  padding:8px 18px;
  border:none;border-radius:var(--r-md);
  font-size:13px;font-weight:600;
  font-family:inherit;
  cursor:pointer;
  transition:all var(--t-fast);
  white-space:nowrap;
  text-decoration:none;
  line-height:1.4;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
  box-shadow:0 2px 8px rgba(99,102,241,0.25);
}
.btn-primary:hover{
  background:var(--primary-l);
  box-shadow:0 4px 16px rgba(99,102,241,0.35);
  transform:translateY(-1px);
}
.btn-secondary{
  background:var(--primary-s);
  color:var(--primary);
}
.btn-secondary:hover{
  background:#dde4ff;
}
.btn-outline{
  background:transparent;
  border:1.5px solid var(--border);
  color:var(--text-dim);
}
.btn-outline:hover{
  border-color:var(--primary);
  color:var(--primary);
}
.btn-sm{padding:5px 12px;font-size:12px}
.btn-lg{padding:12px 24px;font-size:15px}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#dc2626}

/* ================================================================
   FORMS
   ================================================================ */
input[type="text"],input[type="number"],input[type="password"],
input[type="email"],input[type="date"],input[type="search"],
select,textarea{
  padding:9px 14px;
  border:1.5px solid var(--border);
  border-radius:var(--r-md);
  font-size:14px;font-family:inherit;
  color:var(--text);
  background:var(--card);
  transition:all var(--t-fast);
  outline:none;
  width:100%;
}
input:focus,select:focus,textarea:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(99,102,241,0.1);
}
label{
  font-size:13px;font-weight:600;
  color:var(--text-dim);
  margin-bottom:4px;
  display:block;
}

/* ================================================================
   BADGES & TAGS
   ================================================================ */
.badge{
  display:inline-flex;align-items:center;
  padding:2px 10px;
  border-radius:var(--r-pill);
  font-size:11px;font-weight:600;
  letter-spacing:0.02em;
}
.badge-primary{background:var(--primary-s);color:var(--primary)}
.badge-success{background:var(--success-s);color:var(--success)}
.badge-warning{background:var(--warning-s);color:#b45309}
.badge-danger{background:var(--danger-s);color:var(--danger)}

/* ================================================================
   CHART AREA
   ================================================================ */
.chart-card{
  background:var(--card);
  border:1px solid var(--border-l);
  border-radius:var(--r-lg);
  padding:var(--sp-xl) var(--sp-2xl);
  box-shadow:var(--sh-sm);
  margin-bottom:var(--sp-xl);
}
.chart-card svg{display:block;margin:0 auto;max-width:100%;height:auto}

/* ================================================================
   LOGIN PAGE
   ================================================================ */
.auth-page{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#eef2ff 0%,#e0e7ff 40%,#f0f4ff 100%);
  padding:var(--sp-2xl);
}
.auth-card{
  width:100%;max-width:420px;
  background:var(--card);
  border-radius:var(--r-xl);
  padding:var(--sp-3xl);
  box-shadow:var(--sh-lg);
  text-align:center;
}
.auth-logo{
  width:56px;height:56px;
  border-radius:var(--r-lg);
  background:linear-gradient(135deg,#6366f1,#818cf8);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto var(--sp-lg);
  font-size:28px;
  box-shadow:0 4px 16px rgba(99,102,241,0.3);
}
.auth-card h1{
  font-size:22px;font-weight:700;
  margin:0 0 4px;
  letter-spacing:-0.02em;
}
.auth-card .subtitle{
  color:var(--muted);font-size:13px;
  margin-bottom:var(--sp-2xl);
}

/* ================================================================
   EMPTY STATE
   ================================================================ */
.empty-state{
  text-align:center;
  padding:var(--sp-4xl) var(--sp-2xl);
  color:var(--muted);
}
.empty-state .icon{
  font-size:48px;margin-bottom:var(--sp-md);
  opacity:0.6;
}
.empty-state h4{
  font-size:15px;color:var(--text-dim);
  margin:0 0 var(--sp-sm);
}

/* ================================================================
   SCOPE PILLS (全园/大班/中班/小班)
   ================================================================ */
.scope-pills{
  display:flex;gap:6px;flex-wrap:wrap;
  margin-bottom:var(--sp-lg);
}
.scope-pill{
  padding:6px 16px;
  border-radius:var(--r-pill);
  border:1.5px solid var(--border);
  background:transparent;
  color:var(--text-dim);
  font-size:13px;font-weight:500;
  cursor:pointer;
  transition:all var(--t-fast);
  font-family:inherit;
}
.scope-pill:hover{border-color:var(--primary);color:var(--primary)}
.scope-pill.active{
  background:var(--primary);
  color:#fff;
  border-color:var(--primary);
}

/* ================================================================
   TOAST / NOTIFICATION
   ================================================================ */
.toast{
  position:fixed;top:20px;right:20px;z-index:9999;
  padding:12px 20px;
  border-radius:var(--r-md);
  background:var(--card);
  box-shadow:var(--sh-lg);
  font-size:14px;
  display:flex;align-items:center;gap:var(--sp-sm);
  animation:slideIn 0.3s ease;
  max-width:380px;
}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* ================================================================
   RESPONSIVE
   ================================================================ */

/* Tablet & small desktop */
@media (max-width:1024px){
  .admin-layout{
    grid-template-columns:1fr;
  }
  .admin-sidebar{
    position:static;
    display:flex;overflow-x:auto;
    gap:4px;padding:var(--sp-sm);
    -webkit-overflow-scrolling:touch;
  }
  .admin-sidebar .nav-item{
    flex-shrink:0;margin-bottom:0;
  }
  .stats-row{
    grid-template-columns:repeat(3,1fr);
    gap:var(--sp-md);
  }
  .container{padding:var(--sp-lg) var(--sp-md)}
}

/* Mobile */
@media (max-width:640px){
  .topbar{padding:10px 16px}
  .brand-title{font-size:15px}
  .brand-subtitle{display:none}
  .nav a,.nav span{font-size:12px;padding:5px 10px}
  .container{padding:var(--sp-md) var(--sp-sm)}
  .stats-row{
    grid-template-columns:1fr;
    gap:var(--sp-sm);
  }
  .stat-card{padding:var(--sp-md) var(--sp-lg)}
  .stat-number{font-size:24px}
  .card{padding:var(--sp-lg);border-radius:var(--r-md)}
  .tab-bar{border-radius:var(--r-md)}
  .tab-btn{padding:8px 14px;font-size:13px}
  .data-table{min-width:640px;font-size:12px}
  .data-table th,.data-table td{padding:8px 10px}
  .chart-card{padding:var(--sp-md)}
  .auth-card{padding:var(--sp-2xl)}
  .btn{padding:8px 14px;font-size:12px}
  .collapse-trigger{font-size:14px}
}

/* Small mobile */
@media (max-width:380px){
  .nav{display:none}
  .tab-btn{padding:6px 12px;font-size:12px;gap:3px}
  .tab-btn .emoji{display:none}
}

/* ================================================================
   PRINT
   ================================================================ */
@media print{
  .topbar,.nav,.tab-bar,.admin-sidebar,.btn{display:none!important}
  .card{box-shadow:none;border:1px solid #ddd;break-inside:avoid}
  .data-table{font-size:11px}
}