* { margin: 0; padding: 0; box-sizing: border-box; }
:root { --primary: #3b82f6; --secondary: #1d4ed8; --on-primary: #ffffff; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f1f5f9;
  min-height: 100vh;
  color: #1f2937;
}

/* 登录 */
.login-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  display: flex; justify-content: center; align-items: center; z-index: 9999;
}
.login-box {
  background: white; padding: 40px; border-radius: 20px;
  width: 320px; text-align: center; box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-box h2 { font-size: 22px; margin-bottom: 6px; }
.login-sub { color: #9ca3af; font-size: 13px; margin-bottom: 24px; }
.login-box input {
  width: 100%; padding: 12px; border: 2px solid #e5e7eb; border-radius: 10px;
  font-size: 15px; margin-bottom: 12px; outline: none; text-align: center;
}
.login-box input:focus { border-color: var(--primary); }
.login-error { color: #ef4444; font-size: 13px; margin-top: 10px; min-height: 18px; }

/* 主界面 */
.main { max-width: 900px; margin: 0 auto; padding: 20px; }
.topbar {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--on-primary); border-radius: 16px; padding: 18px 24px;
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px;
}
.topbar h1 { font-size: 20px; }
.topbar-left { display: flex; align-items: center; gap: 10px; }
.header-logo { height: 32px; object-fit: contain; }
.header-school-name { font-size: 16px; font-weight: 700; color: var(--on-primary); white-space: nowrap; }
.topbar-actions { display: flex; gap: 10px; align-items: center; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--on-primary); border: none; border-radius: 10px; padding: 10px 20px;
  font-size: 14px; font-weight: 600; cursor: pointer;
}
.btn-primary:hover { opacity: 0.9; }
.btn-ghost {
  background: #f3f4f6; color: #374151; border: 1px solid #e5e7eb;
  border-radius: 10px; padding: 10px 16px; font-size: 14px; cursor: pointer; text-decoration: none;
}
.btn-ghost:hover { background: #e5e7eb; }
.topbar .btn-ghost {
  background: rgba(255,255,255,0.15); color: var(--on-primary); border: 1px solid rgba(255,255,255,0.4);
}
.topbar .btn-ghost:hover { background: rgba(255,255,255,0.25); }

.content { display: flex; flex-direction: column; gap: 16px; }
.card {
  background: white; border-radius: 16px; padding: 24px; box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.card h2 { font-size: 17px; margin-bottom: 16px; color: #111827; }
.hint { color: #9ca3af; font-size: 13px; margin-bottom: 16px; }
.muted { color: #9ca3af; font-size: 12px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > span, .field-label { font-size: 13px; color: #6b7280; font-weight: 500; }
.field input[type="text"], .field input[type="color"], .field input[type="number"], .field select {
  padding: 11px 14px; border: 2px solid #e5e7eb; border-radius: 10px; font-size: 15px; outline: none;
  font-family: inherit;
}
.field input[type="color"] { height: 44px; padding: 4px; cursor: pointer; }
.field select { background: white; }
.field input:focus, .field select:focus { border-color: var(--primary); }

.logo-row { display: flex; align-items: center; gap: 16px; margin-top: 16px; }
.logo-preview { width: 64px; height: 64px; object-fit: contain; border-radius: 12px; background: #f3f4f6; border: 1px solid #e5e7eb; }

.row-item {
  display: flex; align-items: center; gap: 14px; padding: 10px 0;
  border-bottom: 1px solid #f3f4f6; flex-wrap: wrap;
}
.row-item:last-child { border-bottom: none; }
.row-item input[type="text"] {
  flex: 1; min-width: 140px; padding: 9px 12px; border: 2px solid #e5e7eb;
  border-radius: 8px; font-size: 14px; outline: none;
}
.row-item input[type="text"]:focus { border-color: var(--primary); }

.switch { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: #4b5563; cursor: pointer; }
.switch input { width: 16px; height: 16px; cursor: pointer; }

.btn-danger {
  background: #ef4444; color: white; border: none; border-radius: 8px;
  padding: 8px 14px; font-size: 13px; cursor: pointer;
}
.btn-danger:hover { opacity: 0.9; }

.purpose-block { margin-bottom: 20px; }
.purpose-title { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.purpose-item {
  display: flex; align-items: center; gap: 14px; padding: 10px 0;
  border-bottom: 1px solid #f3f4f6; flex-wrap: wrap;
}
.purpose-item:last-child { border-bottom: none; }
.purpose-name { font-size: 14px; font-weight: 600; color: #374151; min-width: 60px; }
.purpose-flag { display: flex; align-items: center; gap: 5px; font-size: 13px; color: #4b5563; cursor: pointer; }
.purpose-flag input { width: 15px; height: 15px; accent-color: var(--primary); cursor: pointer; }
.purpose-desc-input {
  flex: 1; min-width: 160px; padding: 8px 12px; border: 2px solid #e5e7eb;
  border-radius: 8px; font-size: 13px; outline: none;
}
.purpose-desc-input:focus { border-color: var(--primary); }
.purpose-item .btn-danger { margin-left: auto; }
.chip-wrap { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; background: #eff6ff;
  color: #1d4ed8; border-radius: 20px; padding: 6px 12px; font-size: 13px;
}
.chip button { background: none; border: none; color: #94a3b8; font-size: 16px; cursor: pointer; line-height: 1; }
.chip button:hover { color: #ef4444; }
.add-purpose { display: flex; gap: 8px; }
.add-purpose input {
  flex: 1; padding: 9px 12px; border: 2px solid #e5e7eb; border-radius: 8px; font-size: 14px; outline: none;
}
.add-purpose input:focus { border-color: var(--primary); }
.add-purpose .btn-ghost { background: #f3f4f6; color: #374151; border: none; }

.user-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
.user-table th { background: #f8fafc; padding: 10px 12px; text-align: left; font-size: 13px; color: #6b7280; }
.user-table td { padding: 10px 12px; border-top: 1px solid #f0f0f0; font-size: 14px; }
#userList { overflow-x: auto; }

.add-user { display: flex; gap: 10px; flex-wrap: wrap; }
.add-user input, .add-user select {
  flex: 1; min-width: 120px; padding: 9px 12px; border: 2px solid #e5e7eb;
  border-radius: 8px; font-size: 14px; outline: none;
}
.add-user input:focus, .add-user select:focus { border-color: var(--primary); }

.theme-preview { margin-top: 16px; }
.tp-header { color: var(--on-primary); padding: 16px; border-radius: 10px 10px 0 0; font-size: 15px; font-weight: 600; }
.tp-btn {
  color: var(--on-primary); padding: 12px; border-radius: 0 0 10px 10px; text-align: center;
  font-size: 14px; font-weight: 600;
}

@media (max-width: 600px) {
  .main { padding: 10px; }
  .topbar { flex-direction: column; gap: 12px; padding: 14px 16px; }
  .topbar h1 { font-size: 17px; }
  .topbar-actions { flex-wrap: wrap; justify-content: center; }
  .card { padding: 16px; border-radius: 12px; }
  .grid2 { grid-template-columns: 1fr; gap: 12px; }
  .field input[type="text"], .field input[type="color"], .field input[type="number"], .field select,
  .row-item input[type="text"], .add-purpose input, .add-user input, .add-user select { font-size: 16px; }
  .add-user input, .add-user select { flex: 1 1 100%; min-width: 0; }
  .row-item { gap: 10px; }
  .row-item input[type="text"] { min-width: 120px; }
  .user-table table { min-width: 360px; }
}