/* ===== ADMIN RESET ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
:root {
  --primary: #1A3A5C;
  --primary-light: #2A5A8C;
  --primary-dark: #0D1F3C;
  --accent: #C9A96E;
  --accent-dark: #A88B4E;
  --success: #2D8C5A;
  --danger: #E53935;
  --n900: #1A1A2E;
  --n700: #404060;
  --n500: #7A7A99;
  --n400: #9999B3;
  --n200: #D8D8E6;
  --n100: #F0F0F5;
  --n50: #F8F8FA;
  --sidebar-w: 260px;
  --transition: .3s cubic-bezier(.16,1,.3,1);
}
body { font-family: -apple-system, 'Noto Sans SC', 'Segoe UI', sans-serif; background: var(--n50); color: var(--n900); }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
input, textarea, select { font-family: inherit; font-size: 14px; }

/* ===== LOGIN ===== */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%); position: relative; overflow: hidden; }
.login-page::before { content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(201,169,110,.12) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(42,90,140,.3) 0%, transparent 50%); }
.login-box { position: relative; z-index: 2; width: 420px; background: rgba(255,255,255,.95);
  border-radius: 24px; padding: 48px 40px; box-shadow: 0 32px 80px rgba(0,0,0,.3); }
.login-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; justify-content: center; }
.login-logo-icon { width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex; align-items: center; justify-content: center; border: 2px solid var(--accent); }
.login-logo-icon i { color: var(--accent); font-size: 26px; }
.login-logo-text { font-size: 22px; font-weight: 700; color: var(--primary); }
.login-title { text-align: center; font-size: 20px; font-weight: 600; color: var(--n700); margin-bottom: 32px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--n700); margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border-radius: 10px; border: 1px solid var(--n200);
  background: #fff; color: var(--n900); transition: var(--transition); outline: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,58,92,.08);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.login-btn { width: 100%; padding: 14px; border-radius: 12px; border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff;
  font-size: 16px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.login-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,169,110,.3); }
.login-error { color: var(--danger); font-size: 14px; text-align: center; margin-bottom: 16px; display: none; }
.login-hint { text-align: center; font-size: 13px; color: var(--n400); margin-top: 16px; }

/* ===== ADMIN LAYOUT ===== */
.admin-layout { display: flex; min-height: 100vh; }

/* SIDEBAR */
.sidebar { width: var(--sidebar-w); background: var(--primary-dark); color: #fff;
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
  display: flex; flex-direction: column; transition: var(--transition); }
.sidebar-header { padding: 24px 20px; display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,.06); }
.sidebar-header .logo-icon { width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex; align-items: center; justify-content: center; border: 1.5px solid var(--accent); }
.sidebar-header .logo-icon i { color: var(--accent); font-size: 20px; }
.sidebar-header .logo-text { font-size: 16px; font-weight: 700; line-height: 1.3; }
.sidebar-header .logo-text .en { font-size: 9px; color: var(--accent); letter-spacing: 1.5px; }
.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.sidebar-nav .nav-label { font-size: 11px; color: rgba(255,255,255,.3); text-transform: uppercase;
  letter-spacing: 1px; padding: 16px 12px 8px; }
.sidebar-nav a { display: flex; align-items: center; gap: 12px; padding: 10px 12px;
  border-radius: 10px; color: rgba(255,255,255,.6); font-size: 14px; font-weight: 500;
  transition: var(--transition); margin-bottom: 2px; cursor: pointer; }
.sidebar-nav a:hover { background: rgba(255,255,255,.05); color: #fff; }
.sidebar-nav a.active { background: rgba(201,169,110,.15); color: var(--accent); }
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,.06); }
.sidebar-footer a { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,.4);
  font-size: 13px; transition: var(--transition); cursor: pointer; }
.sidebar-footer a:hover { color: #fff; }

/* MAIN CONTENT */
.admin-main { flex: 1; margin-left: var(--sidebar-w); }
.admin-topbar { height: 64px; background: #fff; border-bottom: 1px solid var(--n100);
  display: flex; align-items: center; justify-content: space-between; padding: 0 32px;
  position: sticky; top: 0; z-index: 50; }
.topbar-title { font-size: 18px; font-weight: 600; color: var(--n900); }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar-user { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--n500); }
.topbar-user .avatar { width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 600; }
.admin-content { padding: 32px; }

/* CARDS */
.card { background: #fff; border-radius: 16px; border: 1px solid var(--n100); padding: 24px; margin-bottom: 24px; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.card-title { font-size: 18px; font-weight: 600; color: var(--n900); }

/* STATS GRID */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 32px; }
.stat-card { background: #fff; border-radius: 16px; padding: 24px; border: 1px solid var(--n100);
  display: flex; align-items: center; gap: 16px; transition: var(--transition); }
.stat-card:hover { box-shadow: 0 8px 32px rgba(13,31,60,.06); transform: translateY(-2px); }
.stat-card .icon { width: 56px; height: 56px; border-radius: 14px; display: flex;
  align-items: center; justify-content: center; font-size: 24px; }
.stat-card .icon.blue { background: rgba(26,58,92,.08); color: var(--primary); }
.stat-card .icon.green { background: rgba(45,140,90,.08); color: var(--success); }
.stat-card .icon.gold { background: rgba(201,169,110,.1); color: var(--accent-dark); }
.stat-card .icon.red { background: rgba(229,57,53,.06); color: var(--danger); }
.stat-card .info .val { font-size: 32px; font-weight: 800; color: var(--n900); font-family: 'Inter'; }
.stat-card .info .label { font-size: 13px; color: var(--n500); }
.stat-card .info .published { font-size: 11px; color: var(--success); }

/* TABLE */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; padding: 12px 16px; font-size: 13px; font-weight: 600;
  color: var(--n500); border-bottom: 2px solid var(--n100); white-space: nowrap; }
td { padding: 14px 16px; font-size: 14px; border-bottom: 1px solid var(--n100); color: var(--n700); }
tr:hover td { background: var(--n50); }
.badge { display: inline-block; padding: 3px 10px; border-radius: 6px; font-size: 12px; font-weight: 600; }
.badge.published { background: rgba(45,140,90,.1); color: var(--success); }
.badge.unpublished { background: rgba(229,57,53,.08); color: var(--danger); }
.badge.recruiting { background: rgba(45,140,90,.1); color: var(--success); }
.badge.negotiating { background: rgba(201,169,110,.1); color: var(--accent-dark); }
.badge.signed { background: rgba(26,58,92,.08); color: var(--primary); }

/* BUTTONS */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
  border-radius: 8px; font-size: 14px; font-weight: 500; cursor: pointer;
  border: none; transition: var(--transition); font-family: inherit; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-gold { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; }
.btn-gold:hover { box-shadow: 0 4px 16px rgba(201,169,110,.3); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c62828; }
.btn-outline { background: transparent; color: var(--n700); border: 1px solid var(--n200); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-icon { width: 32px; height: 32px; padding: 0; justify-content: center; }

/* MODAL */
.modal-overlay { position: fixed; inset: 0; background: rgba(13,31,60,.5); backdrop-filter: blur(4px);
  z-index: 1000; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.show { display: flex; }
.modal { background: #fff; border-radius: 20px; width: 100%; max-width: 600px; max-height: 90vh;
  overflow-y: auto; box-shadow: 0 32px 80px rgba(0,0,0,.2); }
.modal-header { padding: 24px 28px; border-bottom: 1px solid var(--n100);
  display: flex; align-items: center; justify-content: space-between; }
.modal-title { font-size: 18px; font-weight: 600; color: var(--n900); }
.modal-close { width: 32px; height: 32px; border-radius: 8px; border: none; background: var(--n50);
  cursor: pointer; display: flex; align-items: center; justify-content: center; color: var(--n500);
  transition: var(--transition); }
.modal-close:hover { background: var(--n100); color: var(--n900); }
.modal-body { padding: 28px; }
.modal-footer { padding: 20px 28px; border-top: 1px solid var(--n100);
  display: flex; justify-content: flex-end; gap: 12px; }

/* FORM */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--n700); margin-bottom: 6px; }
.form-group label .req { color: var(--danger); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--n200);
  background: #fff; color: var(--n900); transition: var(--transition); outline: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,58,92,.06);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group .hint { font-size: 12px; color: var(--n400); margin-top: 4px; }
.form-check { display: flex; align-items: center; gap: 8px; }
.form-check input { width: 18px; height: 18px; }
.form-check label { margin: 0; }

/* TOAST */
.toast { position: fixed; top: 80px; right: 32px; z-index: 2000;
  padding: 14px 24px; border-radius: 12px; font-size: 14px; font-weight: 500;
  box-shadow: 0 8px 32px rgba(0,0,0,.12); transform: translateX(400px);
  transition: transform .4s cubic-bezier(.16,1,.3,1); }
.toast.show { transform: translateX(0); }
.toast.success { background: var(--success); color: #fff; }
.toast.error { background: var(--danger); color: #fff; }

/* EMPTY STATE */
.empty-state { text-align: center; padding: 60px 20px; color: var(--n400); }
.empty-state i { font-size: 48px; margin-bottom: 16px; opacity: .3; }
.empty-state p { font-size: 15px; }

/* SECTION VISIBILITY */
.admin-section { display: none; }
.admin-section.active { display: block; }

/* SETTINGS FORM */
.settings-form { max-width: 700px; }
.settings-section-title { font-size: 15px; font-weight: 600; color: var(--primary);
  margin: 24px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--n100); }
.settings-section-title:first-child { margin-top: 0; }

/* APP 二维码上传 */
.qr-upload-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.qr-preview { width: 120px; height: 120px; border-radius: 12px; background: var(--n100);
  border: 1px dashed var(--n200); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.qr-preview img { width: 100%; height: 100%; object-fit: contain; }
.qr-preview i { font-size: 56px; color: var(--n400); }
.qr-upload-actions { display: flex; flex-direction: column; gap: 8px; }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .admin-main { margin-left: 0; }
}
@media (max-width: 640px) {
  .stats-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .admin-content { padding: 16px; }
}