:root {
  --primary-color: #ff434f;
  --secondary-color: #e3e3e3;
  --text-color-lightest: #e7e9ec;
  --text-color-darker: #2e2e2e;
  --text-color-dark: #494949;
  --text-color-gray: #8b8b8b;
  --text-color-dark-gray: #727272;
  --text-color-light-gray: #c6c6c6;
  --backdrop-color: rgba(42, 42, 42, 0.69);
  --section-bg: #f9fbfb;
  --footer-bg: #181818;
  --card-shadow: 0 0 18px rgba(0, 0, 0, 0.06);
}

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

body {
  font-family: Helvetica, "PingFang SC", "Microsoft Yahei", sans-serif;
  font-size: 14px;
  color: var(--text-color-dark);
  background: var(--section-bg);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ---------- Login (hero style) ---------- */
.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(var(--backdrop-color), rgba(24, 24, 24, 0.85)),
    linear-gradient(135deg, #1a2a3a 0%, #2c3e50 50%, #121820 100%);
  color: var(--text-color-lightest);
}
.login-card {
  width: min(400px, 100%);
  background: #fff;
  color: var(--text-color-dark);
  border-radius: 4px;
  padding: 36px 32px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}
.login-card h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 600;
  color: var(--text-color-darker);
}
.login-card h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  background: var(--primary-color);
  margin-top: 12px;
}
.login-card .sub {
  color: var(--text-color-dark-gray);
  margin: 14px 0 22px;
  font-size: 14px;
}
.login-card label {
  display: block;
  font-size: 13px;
  color: var(--text-color-gray);
  margin: 12px 0 6px;
}
.login-card input,
.content input,
.content select,
.content textarea {
  width: 100%;
  border: 1px solid #e5e8ea;
  background: #f4f6f7;
  color: var(--text-color-darker);
  border-radius: 4px;
  padding: 10px 12px;
  outline: none;
}
.login-card input:focus,
.content input:focus,
.content select:focus,
.content textarea:focus {
  border-color: var(--primary-color);
  background: #fff;
}
.login-card button,
.btn {
  margin-top: 22px;
  width: 100%;
  border: 0;
  border-radius: 4px;
  padding: 12px 16px;
  background: var(--primary-color);
  color: var(--text-color-lightest);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
}
.btn.secondary {
  background: var(--secondary-color);
  color: var(--text-color-dark-gray);
  width: auto;
  margin: 0;
}
.btn.danger {
  background: var(--primary-color);
  color: #fff;
  width: auto;
  margin: 0;
}
.btn.secondary:hover,
.filter-btn:hover {
  background: var(--primary-color);
  color: #fff;
}
.error {
  color: var(--primary-color);
  min-height: 20px;
  font-size: 13px;
  margin-top: 10px;
}
.login-home {
  display: block;
  text-align: center;
  margin-top: 16px;
  color: var(--text-color-gray);
  font-size: 13px;
  text-decoration: none;
}
.login-home:hover { color: var(--primary-color); }

/* ---------- Main shell ---------- */
#mainView {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
.sider {
  background: #181818;
  color: var(--text-color-lightest);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.brand {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  padding: 8px 10px 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.25);
}
.sider nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}
.sider nav button,
.logout {
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--text-color-light-gray);
  padding: 12px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}
.sider nav button.active,
.sider nav button:hover {
  background: rgba(255, 67, 79, 0.15);
  color: #fff;
}
.sider nav button.active {
  border-left: 3px solid var(--primary-color);
  padding-left: 11px;
}
.logout { color: var(--primary-color); margin-top: auto; }

.content {
  padding: 28px 32px 48px;
  background: var(--section-bg);
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 24px;
}
.top h2 {
  margin: 0;
  font-size: 28px;
  font-weight: 600;
  color: var(--text-color-darker);
}
.top h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  background: var(--primary-color);
  margin-top: 10px;
}
#adminName {
  color: var(--text-color-gray);
  font-size: 13px;
}
.top-right {
  display: flex;
  align-items: center;
  gap: 14px;
}
.ws-status {
  font-size: 12px;
  color: var(--text-color-gray);
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--secondary-color);
}
.ws-status.on {
  background: rgba(255, 67, 79, 0.12);
  color: var(--primary-color);
}
.socket-toast {
  position: fixed;
  right: 24px;
  top: 24px;
  z-index: 9999;
  min-width: 240px;
  max-width: 360px;
  background: #181818;
  color: #e7e9ec;
  border-left: 4px solid var(--primary-color);
  border-radius: 4px;
  padding: 14px 16px;
  box-shadow: 0 12px 32px rgba(0,0,0,.25);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: .25s ease;
}
.btn.tiny { padding: 4px 10px; font-size: 12px; width: auto; margin: 0 4px 0 0; }
.actions { white-space: nowrap; }
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px;
  background: #e3e3e3; color: #494949;
}
.tag.on { background: rgba(255,67,79,.12); color: #ff434f; }
.tag.off { background: #eee; color: #8b8b8b; }
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 1000;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  width: min(520px, 100%); background: #fff; border-radius: 4px; padding: 22px;
  box-shadow: 0 18px 48px rgba(0,0,0,.25); max-height: 90vh; overflow: auto;
}
.modal h3 { margin: 0 0 14px; color: #2e2e2e; }
.modal .form-grid { box-shadow: none; max-width: none; padding: 0; }
.modal-actions { display: flex; gap: 10px; margin-top: 16px; }
.modal-actions .btn { width: auto; margin: 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}
.card {
  background: #fff;
  border-radius: 4px;
  padding: 20px 18px;
  box-shadow: var(--card-shadow);
}
.card .n {
  font-size: 32px;
  font-weight: 600;
  color: var(--primary-color);
}
.card .l {
  color: var(--text-color-gray);
  margin-top: 8px;
  font-size: 13px;
}

.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.toolbar input { max-width: 240px; }

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}
th, td {
  padding: 12px 14px;
  border-bottom: 1px solid #f0f2f3;
  text-align: left;
  font-size: 13px;
  color: var(--text-color-dark);
}
th {
  color: var(--text-color-dark-gray);
  font-weight: 600;
  background: #f4f6f7;
}

.form-grid {
  display: grid;
  gap: 10px;
  max-width: 480px;
  background: #fff;
  padding: 20px;
  border-radius: 4px;
  box-shadow: var(--card-shadow);
}
.form-grid label {
  font-size: 13px;
  color: var(--text-color-gray);
}

.btn.tiny { padding: 4px 10px; font-size: 12px; width: auto; margin: 0 4px 4px 0; }
.actions { white-space: nowrap; }
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px;
  background: #e3e3e3; color: #494949;
}
.tag.on { background: rgba(255,67,79,.12); color: #ff434f; }
.tag.off { background: #eee; color: #8b8b8b; }
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 1000;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  width: min(520px, 100%); background: #fff; border-radius: 4px; padding: 22px;
  box-shadow: 0 18px 48px rgba(0,0,0,.25); max-height: 90vh; overflow: auto;
}
.modal h3 { margin: 0 0 14px; color: #2e2e2e; }
.modal .form-grid { box-shadow: none; max-width: none; padding: 0; }
.modal-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.modal-actions .btn { width: auto; margin: 0; }

@media (max-width: 800px) {
  #mainView { grid-template-columns: 1fr; }
  .sider {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }
  .sider nav { flex-direction: row; flex-wrap: wrap; }
  .logout { margin-top: 0; }
  .content { padding: 20px 16px 40px; }
}