/* ============================================================
   BAMC ECMWF 预报 · 浅色业务界面
   ============================================================ */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --panel: #ffffff;
  --panel2: #f4f7fa;
  --line: #d9e2ec;
  --line-strong: #bcccdc;
  --text: #102a43;
  --muted: #627d98;
  --muted2: #829ab1;
  --cyan: #1e7bb8;
  --blue: #0066cc;
  --green: #2f9e44;
  --amber: #b7791f;
  --red: #c53030;
  --radius: 14px;
  --shadow: 0 14px 38px rgba(16, 42, 67, .08);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; overflow-x: hidden; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  font: 14px/1.5 Inter, system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

a { color: var(--cyan); }
button, select, input { font: inherit; }
button { color: var(--text); }
img { max-width: 100%; }
svg { width: 18px; height: 18px; display: block; fill: currentColor; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

/* ---------------- 顶栏 ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px clamp(14px, 3vw, 38px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  min-width: 0;
}

.brand-logo {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 2px 8px rgba(0, 102, 204, .08);
}
.brand-logo svg { width: 36px; height: 36px; }

.brand h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: -.02em;
  white-space: nowrap;
}
.brand .bamc { color: var(--blue); font-weight: 900; }
.brand .ec { color: var(--cyan); font-weight: 900; }

.top-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.clock {
  color: var(--cyan);
  font-family: "Courier New", monospace;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .7px;
  white-space: nowrap;
  text-shadow: 0 0 6px rgba(30, 123, 184, .22);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 10px;
  border: 1px solid #b9d8ec;
  border-radius: 8px;
  background: #f4faff;
  color: #17699e;
  font-size: 11px;
  font-weight: 750;
  text-decoration: none;
  white-space: nowrap;
  transition: .15s;
}
.nav-link span { font-size: 10px; opacity: .7; }
.nav-link:hover { background: #e8f4fc; border-color: #8cc3e6; }

.status {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--muted);
  background: #fff;
  font-size: 11px;
  white-space: nowrap;
}
.status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted2); }
.status.ok { color: #276749; border-color: #c7e5d2; background: #f5fbf7; }
.status.ok .dot { background: var(--green); box-shadow: 0 0 0 3px rgba(47, 158, 68, .12); }
.status.warn { color: #8a6116; border-color: #f1dfb3; background: #fffaf0; }
.status.warn .dot { background: var(--amber); }
.status.err { color: #9b2c2c; border-color: #f1c6c6; background: #fff5f5; }
.status.err .dot { background: var(--red); }

.icon-button {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  transition: .15s;
}
.icon-button:hover { color: var(--cyan); border-color: #b9d8ec; background: #f7fbfe; }
.icon-button.spin svg { animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- 主体 / Hero ---------------- */

main {
  max-width: 1500px;
  margin: 0 auto;
  padding: 24px clamp(12px, 2.8vw, 34px) 38px;
}

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.hero h2 {
  margin: 0 0 8px;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.12;
  letter-spacing: -.035em;
}
.hero p { margin: 0; color: var(--muted); max-width: 780px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

button, a.button {
  border: 1px solid var(--line);
  background: #f0f4f8;
  color: var(--text);
  padding: 10px 13px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  touch-action: manipulation;
  transition: .15s;
}
button:hover, a.button:hover { filter: brightness(.98); border-color: var(--line-strong); }
button.primary, a.button.primary { background: var(--cyan); border-color: var(--cyan); color: #fff; }
button.primary:hover { background: #17699e; }
button.full { width: 100%; }
button:disabled { opacity: .42; cursor: not-allowed; }

/* ---------------- 布局 ---------------- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 15px;
  align-items: start;
  width: 100%;
  min-width: 0;
}
.main-panel, .side { width: 100%; min-width: 0; }
.panel { min-width: 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.main-panel { min-width: 0; }

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.panel-head h3 { margin: 0; font-size: 14px; }
.panel-head .muted { display: block; margin-top: 2px; font-size: 11px; }
.muted { color: var(--muted); }

.image-status {
  color: var(--muted);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 99px;
  background: var(--panel2);
  border: 1px solid var(--line);
  white-space: nowrap;
}
.image-status.ok { color: #276749; background: #f5fbf7; border-color: #c7e5d2; }
.image-status.warn { color: #8a6116; background: #fffaf0; border-color: #f1dfb3; }
.image-status.err { color: #9b2c2c; background: #fff5f5; border-color: #f1c6c6; }

.panel-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 9px;
  flex-wrap: wrap;
}
.image-tools { display: flex; align-items: center; gap: 4px; }
.image-tools .tool { width: 31px; height: 31px; background: #fff; }

.loadbar { height: 2px; background: #e8eef4; overflow: hidden; }
.loadbar span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transition: width .25s ease;
}

/* ---------------- 图像 ---------------- */

.viewer {
  position: relative;
  height: min(66vh, 720px);
  min-height: 420px;
  overflow: hidden;
  background: linear-gradient(180deg, #f7fafc, #eef4f9);
  cursor: grab;
  touch-action: none;
  user-select: none;
}
.viewer.grabbing { cursor: grabbing; }

.stage {
  position: absolute;
  inset: 0;
  transform-origin: 50% 50%;
  will-change: transform;
}
.layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}
.layer.show { opacity: 1; }

.overlay-tag {
  position: absolute;
  left: 13px;
  top: 13px;
  z-index: 2;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 255, 255, .92);
  color: var(--text);
  font-size: 11px;
  backdrop-filter: blur(8px);
  pointer-events: none;
}

.tool {
  width: 34px;
  height: 34px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
}
.tool:hover { color: var(--cyan); border-color: #b9d8ec; background: #f7fbfe; }

.placeholder {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 13px;
  background: var(--panel2);
  transition: opacity .25s;
}
.placeholder.gone { opacity: 0; pointer-events: none; }

.error-box {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 4;
  transform: translate(-50%, -50%);
  max-width: min(460px, 82%);
  padding: 18px 22px;
  border: 1px solid #f1c6c6;
  border-radius: 12px;
  background: #fff;
  color: #9b2c2c;
  text-align: center;
  box-shadow: var(--shadow);
}

.img-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 15px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
  font-size: 11px;
}
.footer-left { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.region-chip {
  display: inline-block;
  padding: 3px 7px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel2);
  color: var(--muted);
  font-size: 10.5px;
}

/* ---------------- 时间轴 ---------------- */

.timeline {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: #fff;
}
.transport { display: flex; align-items: center; gap: 4px; flex: none; }
.tbtn {
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  display: grid;
  place-items: center;
}
.tbtn:hover { background: var(--panel2); color: var(--cyan); }
.tbtn:disabled { opacity: .35; }
.play {
  width: 42px;
  height: 42px;
  padding: 0;
  margin: 0 4px;
  border: 0;
  border-radius: 50%;
  background: var(--cyan);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 5px 14px rgba(30, 123, 184, .25);
}
.play:hover { background: #17699e; }
.play svg { width: 17px; height: 17px; }

.track { flex: 1; min-width: 0; }
.track input[type="range"] {
  width: 100%;
  height: 20px;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}
.track input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--cyan) var(--p, 0%), #e2e8f0 var(--p, 0%));
}
.track input[type="range"]::-moz-range-track { height: 4px; border-radius: 99px; background: #e2e8f0; }
.track input[type="range"]::-moz-range-progress { height: 4px; border-radius: 99px; background: var(--cyan); }
.track input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--cyan);
  box-shadow: 0 0 0 3px rgba(30, 123, 184, .12);
}
.track input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--cyan);
}
.axis {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted2);
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
}
.time-readout { min-width: 66px; text-align: right; flex: none; }
.time-readout b {
  display: block;
  color: var(--blue);
  font-size: 20px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.time-readout span { color: var(--muted2); font-size: 10.5px; font-variant-numeric: tabular-nums; }

/* ---------------- 右侧设置 ---------------- */

.side { display: grid; gap: 13px; position: sticky; top: 84px; }
.controls { padding: 15px; }
.controls h3 { margin: 0 0 14px; font-size: 14px; }

.field { display: grid; gap: 6px; margin-bottom: 13px; }
.field label { color: var(--muted); font-size: 11px; }
.field select {
  width: 100%;
  min-width: 0;
  padding: 10px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 13px;
  outline: none;
}
.field select:focus { border-color: #8cc3e6; box-shadow: 0 0 0 3px rgba(30, 123, 184, .1); }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }

.toggle {
  width: 100%;
  height: 40px;
  padding: 0 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 12px;
}
.toggle.on { color: #276749; border-color: #bde1c9; background: #f4fbf6; }
.toggle svg { width: 15px; height: 15px; }
.toggle span { white-space: nowrap; }

.controls .primary.full { margin: 2px 0 8px; }
.hint { margin: 11px 0 0; color: var(--muted); font-size: 11px; line-height: 1.55; }

.info-card { padding: 15px; }
.info-card h3 { margin: 0 0 13px; font-size: 14px; }
.meta-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px dashed #e5edf4;
  font-size: 12px;
}
.meta-row:last-of-type { border-bottom: 0; }
.meta-row span { color: var(--muted); flex: none; }
.meta-row b { text-align: right; font-weight: 600; color: #243b53; }

/* ---------------- 提示 ---------------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 12px);
  z-index: 50;
  padding: 10px 16px;
  border-radius: 9px;
  background: #102a43;
  color: #fff;
  font-size: 12.5px;
  box-shadow: 0 12px 30px rgba(16, 42, 67, .22);
  opacity: 0;
  pointer-events: none;
  transition: .22s;
  max-width: calc(100vw - 30px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 全屏 ---------------- */

.main-panel:fullscreen { display: flex; flex-direction: column; background: #fff; }
.main-panel:fullscreen .viewer { flex: 1; height: auto; max-height: none; }
.main-panel:fullscreen .side { display: none; }

/* ---------------- 响应式 ---------------- */

@media (max-width: 1100px) {
  .layout { grid-template-columns: minmax(0, 1fr) 280px; }
  .clock { font-size: 13px; }
}

@media (max-width: 960px) {
  .layout { display: flex; flex-direction: column; align-items: stretch; }
  .main-panel { flex: none; }
  .side { display: grid; grid-template-columns: 1fr 1fr; width: 100%; position: static; }
  .viewer { height: min(62vh, 620px); }
  .brand h1 { font-size: 18px; }
}

@media (max-width: 700px) {
  .site-header { padding: 12px 14px; flex-wrap: wrap; }
  .brand { flex: 1 1 auto; }
  .top-right { flex: 0 0 auto; }
  .hero { min-width: 0; }
  .hero > div { min-width: 0; max-width: 100%; }
  .hero p { overflow-wrap: anywhere; }
  .clock { display: none; }
  .nav-link { display: none; }
  .brand-logo { width: 36px; height: 36px; border-radius: 10px; }
  .brand-logo svg { width: 31px; height: 31px; }
  .brand h1 { font-size: 17px; }
  .status { display: none; }
  main { padding: 18px 12px 28px; }
  .hero { margin-bottom: 14px; }
  .hero h2 { font-size: 24px; }
  .hero p { font-size: 12.5px; }
  .side { grid-template-columns: 1fr; }
  .viewer { height: clamp(300px, 78vw, 560px); min-height: 0; }
  .timeline { gap: 8px; padding: 8px 10px; }
  .transport .tbtn:nth-child(1), .transport .tbtn:nth-child(5) { display: none; }
  .play { width: 38px; height: 38px; }
  .time-readout b { font-size: 17px; }
  .time-readout { min-width: 52px; }
  .img-footer { padding: 9px 12px; }
  .panel-actions { width: 100%; justify-content: space-between; }
  .image-tools .tool { width: 30px; height: 30px; }
  .image-tools .tool svg { width: 16px; height: 16px; }
  .image-status { font-size: 10.5px; }
}

@media (max-width: 430px) {
  .brand h1 .ec { font-size: 15px; }
  .top-right .icon-button { width: 34px; height: 34px; }
  #btnFullscreen { display: none; }
  .brand h1 { white-space: normal; }
  .viewer { height: clamp(280px, 80vw, 420px); }
  .pair { grid-template-columns: 1fr; }
  .timeline .track { min-width: 90px; }
}

@media (prefers-reduced-motion: reduce) {
  .layer, .loadbar span, .toast, .placeholder { transition: none !important; }
}