/* ===== 竹二 DSP WebEQ =====================================================
   仪器面板风格：浅色方格纸外壳 + 深色示波窗口 + 琥珀色曲线
   ======================================================================== */

:root {
  --paper: #e7e9e2;
  --paper-raised: #f2f3ee;
  --panel: #0e1614;
  --panel-grid: #1e2b27;
  --panel-grid-strong: #2c3d37;
  --ink: #141a17;
  --ink-soft: #55645c;
  --line: #c6ccc1;
  --line-strong: #a9b2a6;
  --bamboo: #2f6b52;
  --bamboo-deep: #234f3d;
  --amber: #e3a03c;
  --amber-deep: #b87a1f;
  --danger: #a8452c;
  --radius: 3px;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, rgba(20, 26, 23, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 26, 23, .045) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -.01em; }

button, input, select { font: inherit; color: inherit; }

a { color: var(--bamboo-deep); }

/* ---------- 顶部 -------------------------------------------------------- */

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line-strong);
  background: rgba(242, 243, 238, .82);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand { display: flex; align-items: baseline; gap: 10px; margin-right: auto; }

.brand h1 { font-size: 17px; }

.brand .zh {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: .04em;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  padding: 5px 9px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-raised);
  white-space: nowrap;
}

.status .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--line-strong);
  box-shadow: 0 0 0 3px rgba(169, 178, 166, .18);
}
.status[data-live="on"] .dot { background: var(--bamboo); box-shadow: 0 0 0 3px rgba(47, 107, 82, .18); }
.status[data-live="busy"] .dot { background: var(--amber); animation: pulse 1s infinite; }
.status[data-live="error"] .dot { background: var(--danger); }

@keyframes pulse { 50% { opacity: .3; } }
@media (prefers-reduced-motion: reduce) {
  .status[data-live="busy"] .dot { animation: none; }
}

/* ---------- 按钮 -------------------------------------------------------- */

.btn {
  --btn-bg: var(--paper-raised);
  --btn-fg: var(--ink);
  --btn-bd: var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 13px;
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color .15s, border-color .15s, transform .06s;
  white-space: nowrap;
}
.btn:hover { background: #e9ebe4; }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--bamboo); outline-offset: 2px; }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }

.btn--primary { --btn-bg: var(--bamboo); --btn-fg: #f4f7f2; --btn-bd: var(--bamboo-deep); }
.btn--primary:hover { background: var(--bamboo-deep); }

.btn--ghost { --btn-bg: transparent; --btn-bd: var(--line-strong); }
.btn--ghost:hover { background: rgba(20, 26, 23, .05); }

.btn--sm { padding: 4px 9px; font-size: 12px; }

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

.shell {
  display: grid;
  grid-template-columns: 268px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 22px 40px;
  align-items: start;
}

@media (max-width: 900px) {
  /* 窄屏把曲线提到最前面：先看响应曲线，再看设备卡 */
  .shell { grid-template-columns: minmax(0, 1fr); padding: 12px 12px 32px; }
  .main { order: 1; }
  .rail { order: 2; }
}

.card {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-raised);
}

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 13px;
  border-bottom: 1px solid var(--line);
}

.card__head h2 { font-size: 13px; letter-spacing: .02em; }

.card__body { padding: 13px; }

.rail { display: flex; flex-direction: column; gap: 14px; position: sticky; top: 68px; }
@media (max-width: 900px) { .rail { position: static; } }

.main { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

/* ---------- 设备卡 ------------------------------------------------------ */

.device-name {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: .01em;
  word-break: break-all;
}
.device-meta { font-family: var(--mono); font-size: 11.5px; color: var(--ink-soft); margin-top: 3px; }

.stack { display: flex; flex-direction: column; gap: 8px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.row > .btn { flex: 1 1 auto; }

.hint {
  font-size: 11.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  border-left: 2px solid var(--amber);
  padding-left: 9px;
}

/* ---------- 曲线 -------------------------------------------------------- */

.plot-wrap {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.plot-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 13px;
  border-bottom: 1px solid var(--panel-grid-strong);
  color: #9db0a8;
  font-family: var(--mono);
  font-size: 11.5px;
}

.plot-head .spacer { margin-left: auto; }

.plot-head b { color: var(--amber); font-weight: 500; }

canvas#plot { display: block; width: 100%; height: 340px; touch-action: none; cursor: crosshair; }
@media (max-width: 640px) { canvas#plot { height: 260px; } }

/* ---------- 频段列表 ---------------------------------------------------- */

.band {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 0;
  border-top: 1px solid var(--line);
}
.band:first-child { border-top: none; }

.band .ctl {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 1 1 0;
  min-width: 0;
}
.band .ctl > label {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-soft);
  width: 11px;
  flex: none;
}
.band .ctl > output {
  font-family: var(--mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  min-width: 62px;
  text-align: right;
  flex: none;
}
.band .ctl > input[type="range"] { flex: 1 1 auto; min-width: 40px; }

@media (max-width: 820px) {
  .band { flex-wrap: wrap; row-gap: 2px; }
  .band .ctl { flex: 1 1 100%; }
  .band .dot { order: 0; }
  .band select.type { order: 1; flex: 1 1 auto; }
}

.band__dot {
  width: 9px; height: 9px; border-radius: 50%;
  flex: none;
  border: 1px solid rgba(0, 0, 0, .25);
}

.band__label { font-family: var(--mono); font-size: 12px; }

.readout {
  font-family: var(--mono);
  font-size: 12px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

select.type {
  appearance: none;
  padding: 4px 4px 4px 6px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--paper-raised);
  font-family: var(--mono);
  font-size: 11.5px;
  width: 64px;
  flex: none;
  cursor: pointer;
}
select.type:focus-visible { outline: 2px solid var(--bamboo); outline-offset: 1px; }

input[type="number"] {
  width: 100%;
  padding: 4px 6px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--paper-raised);
  font-family: var(--mono);
  font-size: 12px;
}
input[type="number"]:focus-visible { outline: 2px solid var(--bamboo); outline-offset: 1px; }

/* 原生 range，按 guide 的滑块配色方案 */
input[type="range"] {
  --slider-track-size: 3px;
  --slider-thumb-size: 13px;
  --slider-fill-color: var(--bamboo);
  --slider-track-color: #cdd3c8;
  appearance: none;
  inline-size: 100%;
  block-size: 20px;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  block-size: var(--slider-track-size);
  border-radius: 999px;
  background: var(--slider-track-color);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  inline-size: var(--slider-thumb-size);
  block-size: var(--slider-thumb-size);
  margin-block-start: calc((var(--slider-track-size) - var(--slider-thumb-size)) / 2);
  border: 1px solid var(--bamboo-deep);
  border-radius: 50%;
  background: var(--slider-fill-color);
}
input[type="range"]::-moz-range-track {
  block-size: var(--slider-track-size);
  border-radius: 999px;
  background: var(--slider-track-color);
}
input[type="range"]::-moz-range-thumb {
  inline-size: var(--slider-thumb-size);
  block-size: var(--slider-thumb-size);
  border: 1px solid var(--bamboo-deep);
  border-radius: 50%;
  background: var(--slider-fill-color);
}
input[type="range"]:focus-visible { outline: 2px solid var(--bamboo); outline-offset: 3px; }

/* ---------- 社区 -------------------------------------------------------- */

.searchbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.searchbar input[type="search"] {
  flex: 1 1 220px;
  min-width: 0;
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #fbfcf8;
  font-size: 13px;
}
.searchbar input[type="search"]:focus-visible { outline: 2px solid var(--bamboo); outline-offset: 1px; }

.field {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.field input {
  width: 68px;
  padding: 4px 6px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--paper-raised);
  font-family: var(--mono);
  font-size: 12px;
}
.field input[type="text"] { width: 96px; }

.import-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.preset-list {
  max-height: 420px;
  overflow: auto;
  border-top: 1px solid var(--line);
}

.preset {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 9px 13px;
  border-bottom: 1px solid var(--line);
}
.preset:hover { background: rgba(47, 107, 82, .05); }

.preset__title {
  font-size: 13px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.preset__meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.preset__actions { display: flex; gap: 6px; }

.badge {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-soft);
  margin-left: 6px;
  vertical-align: 1px;
}
.badge--official { border-color: var(--bamboo); color: var(--bamboo-deep); }

/* ---------- 日志 -------------------------------------------------------- */

.log {
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.65;
  color: var(--ink-soft);
  max-height: 168px;
  overflow: auto;
  padding: 9px 11px;
  background: #eef0e9;
  border-top: 1px solid var(--line);
  white-space: pre-wrap;
  word-break: break-all;
}
.log b { color: var(--bamboo-deep); font-weight: 600; }
.log .err { color: var(--danger); }

details.fold summary {
  cursor: pointer;
  padding: 9px 13px;
  font-size: 12px;
  color: var(--ink-soft);
  font-family: var(--mono);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 7px;
}
details.fold summary::-webkit-details-marker { display: none; }
details.fold summary::before { content: "▸"; font-size: 10px; }
details.fold[open] summary::before { content: "▾"; }
details.fold summary:focus-visible { outline: 2px solid var(--bamboo); outline-offset: -2px; }

/* ---------- 对话框 ------------------------------------------------------ */

dialog {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-raised);
  color: var(--ink);
  padding: 0;
  max-width: 520px;
  width: calc(100% - 32px);
}
dialog::backdrop { background: rgba(14, 22, 20, .45); }
dialog .card__body { padding: 16px; }
dialog h2 { font-size: 15px; margin-bottom: 8px; }
dialog p { margin: 0 0 10px; font-size: 13px; color: var(--ink-soft); }
dialog .row { justify-content: flex-end; margin-top: 16px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  padding: 9px 15px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #f2f4ef;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  z-index: 50;
  max-width: calc(100vw - 32px);
}
.toast[data-show="1"] { opacity: 1; transform: translateX(-50%) translateY(-4px); }
.toast[data-kind="error"] { background: var(--danger); }

.mono { font-family: var(--mono); }
.muted { color: var(--ink-soft); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

@media (max-width: 900px) { .topbar { background: #ff00ff !important; } .rail { outline: 6px solid #00ff00; } }