/* ==========================================================================
   SingClan SCADA — 布局：导航 / 页头 / 栅格 / 页脚 / 响应式
   ========================================================================== */

/* =========================== 顶部导航 =========================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 500;
  height: var(--nav-h);
  background: rgba(9, 14, 24, 0.9);
  border-bottom: 1px solid var(--line-1);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
}

.nav-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 100%;
  max-width: 1680px;
  margin: 0 auto;
  padding: 0 18px;
}

/* ---- 品牌 ---- */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: none;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--brand), var(--brand-d) 62%, #a83a0c);
  box-shadow: 0 5px 16px rgba(255, 122, 53, 0.42);
}

.brand-mark svg { width: 21px; height: 21px; color: #fff; }

.brand-txt { display: flex; flex-direction: column; line-height: 1.15; }

.brand-txt .b1 {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--tx-1);
}

.brand-txt .b1 em {
  font-style: normal;
  color: var(--brand);
}

.brand-txt .b2 {
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--tx-3);
}

/* ---- 菜单 ---- */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 3px;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-menu::-webkit-scrollbar { display: none; }

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 9px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--tx-3);
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-link svg { width: 14px; height: 14px; flex: none; }

.nav-link:hover {
  color: var(--tx-1);
  background: rgba(255, 255, 255, 0.055);
}

.nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(255, 122, 53, 0.92), rgba(229, 95, 28, 0.86));
  box-shadow: 0 4px 15px rgba(255, 122, 53, 0.36);
}

/* ---- 导航右侧状态条 ---- */
.nav-status {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.nav-clock {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
  font-family: "SF Mono", Menlo, monospace;
}

.nav-clock .t {
  font-size: 14px;
  font-weight: 700;
  color: var(--tx-1);
  font-variant-numeric: tabular-nums;
}

.nav-clock .d {
  font-size: 10px;
  color: var(--tx-3);
}

.nav-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.04);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--tx-2);
}

.nav-pill.ok { color: var(--green); border-color: rgba(52, 211, 153, 0.34); background: rgba(52, 211, 153, 0.1); }
.nav-pill.warn { color: var(--amber); border-color: rgba(251, 191, 36, 0.36); background: rgba(251, 191, 36, 0.1); }
.nav-pill.crit { color: #fff; border-color: rgba(255, 45, 85, 0.6); background: linear-gradient(135deg, var(--st-crit), var(--red-d)); animation: badgePulse 0.9s ease-in-out infinite; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--tx-2);
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.icon-btn:hover { color: var(--tx-1); background: rgba(255, 255, 255, 0.09); border-color: var(--line-3); }
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn.on { color: var(--green); border-color: rgba(52, 211, 153, 0.42); background: rgba(52, 211, 153, 0.12); }
.icon-btn.off { color: var(--tx-4); }

/* =========================== 页面容器 =========================== */
.page {
  position: relative;
  z-index: 1;
  max-width: 1680px;
  margin: 0 auto;
  padding: 22px 18px 40px;
}

/* ---- 页头 ---- */
.page-hd {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-1);
}

.page-hd .ph-l { min-width: 0; }

.page-hd h1 {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 25px;
  font-weight: 800;
  letter-spacing: -0.015em;
  background: linear-gradient(100deg, #fff 8%, var(--brand-l) 52%, var(--cyan) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-hd h1 .ico {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 11px;
  background: linear-gradient(140deg, rgba(255, 122, 53, 0.22), rgba(34, 211, 238, 0.16));
  border: 1px solid var(--line-2);
}

.page-hd h1 .ico svg { width: 20px; height: 20px; color: var(--brand); -webkit-text-fill-color: initial; }

.page-hd p {
  margin-top: 5px;
  font-size: 13px;
  color: var(--tx-3);
}

.page-hd .ph-r {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

/* =========================== 栅格 =========================== */
.grid { display: grid; gap: 16px; }

.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.g8 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.span2 { grid-column: span 2; }
.span3 { grid-column: span 3; }

/* 常用主/侧分栏 */
.split-main { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
.split-3-2 { grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); }

.section-gap { margin-bottom: 16px; }

/* 区块标题 */
.sec-hd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.sec-hd h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 16px;
  font-weight: 700;
}

.sec-hd h2::before {
  content: "";
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--brand), var(--brand-d));
}

.sec-hd .hint { font-size: 11.5px; color: var(--tx-3); }

/* =========================== 页脚 =========================== */
.foot {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line-1);
  background: rgba(8, 12, 21, 0.72);
  backdrop-filter: blur(10px);
}

.foot-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  max-width: 1680px;
  margin: 0 auto;
  padding: 18px;
  font-size: 11.5px;
  color: var(--tx-4);
}

.foot-in .f-l { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.foot-in strong { color: var(--tx-3); font-weight: 700; }
.foot-in .sep { color: var(--tx-4); opacity: 0.5; }

/* =========================== 全屏监控模式 =========================== */
body.fullscreen-mode { overflow: hidden; }
body.fullscreen-mode .nav { display: none; }
body.fullscreen-mode .foot { display: none; }
body.fullscreen-mode .page { max-width: none; padding: 14px; height: 100vh; overflow: auto; }

.fs-toggle {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 800;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  background: rgba(19, 27, 45, 0.94);
  color: var(--tx-2);
  cursor: pointer;
  box-shadow: var(--sh-2);
  transition: all 0.2s var(--ease);
}
.fs-toggle:hover { color: var(--brand); border-color: rgba(255, 122, 53, 0.45); }

/* =========================== 响应式 =========================== */
@media (max-width: 1500px) {
  .g8 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 1280px) {
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .split-main,
  .split-3-2 { grid-template-columns: minmax(0, 1fr); }
  .span3 { grid-column: span 2; }
}

@media (max-width: 1080px) {
  .g8 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .nav-in { padding: 0 12px; gap: 10px; }
  .nav-clock { display: none; }
  .brand-txt .b2 { display: none; }
  .page { padding: 16px 12px 32px; }
  .page-hd h1 { font-size: 21px; }
  .g2, .g3, .g4, .g5, .g8 { grid-template-columns: minmax(0, 1fr); }
  .span2, .span3 { grid-column: span 1; }
  .panel-bd { padding: 14px; }
}

@media (max-width: 640px) {
  .nav-pill { display: none; }
  .foot-in { flex-direction: column; align-items: flex-start; }
}