/* Grincements — design system "Instrument + Sismographe" (docs/design/, design system artifact).
   Dark theme: the instrument's graphite screen. Light theme: the recorder's graph paper.
   Amber = measurement (signal), red = action and recording, blue = the squeak band.
   Layout: one column on phones (tab bar at the thumb), two columns from 860px (live left, history right). */

@font-face { font-family: "Barlow"; src: url("fonts/Barlow-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Barlow"; src: url("fonts/Barlow-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Barlow"; src: url("fonts/Barlow-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Barlow Condensed"; src: url("fonts/BarlowCondensed-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Barlow Condensed"; src: url("fonts/BarlowCondensed-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/JetBrainsMono.woff2") format("woff2"); font-weight: 400 700; font-display: swap; }

:root {
  /* color — light: graph paper */
  --ground: #eef0ea;
  --surface: #f8f9f5;
  --surface-sunk: #e3e7dd;
  --grid: #dde1d6;
  --grid-major: #c9cfbf;
  --line: #cdd3c6;
  --ink: #171a16;
  --ink-muted: #5c6359;
  --signal: #9a5a06;
  --signal-soft: #f3e2c4;
  --trace: #1b1f1a;
  --band: #2f5f86;
  --band-soft: #dbe6ef;
  --rec: #c92a1e;
  --on-rec: #ffffff;
  --ok: #1f7a45;
  --warn: #9a6700;
  --bad: #b3261e;
  --focus: #2f5f86;
  --shadow-raise: 0 10px 24px -14px rgba(23, 26, 22, .35);

  /* type */
  --font-display: "Barlow Condensed", "Arial Narrow", "Helvetica Neue", sans-serif;
  --font-body: "Barlow", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;

  /* spacing (4px base) and radii */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-5: 24px; --space-6: 32px; --space-7: 48px;
  --grid-pitch: 16px;
  --radius-sm: 4px; --radius-md: 10px; --radius-lg: 16px; --radius-full: 999px;
  --tabbar-h: 64px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground: #15181b; --surface: #1e2327; --surface-sunk: #111417; --grid: #1b2024; --grid-major: #262d33;
    --line: #2d343a; --ink: #ebe8de; --ink-muted: #9aa1a6; --signal: #f2a93b; --signal-soft: #3d2d15;
    --trace: #f2a93b; --band: #8fb8d6; --band-soft: #1d2b36; --rec: #ff5a4e; --on-rec: #1a0b09;
    --ok: #63c38b; --warn: #e8b04a; --bad: #ff7a70; --focus: #8fb8d6;
    --shadow-raise: 0 14px 34px -12px rgba(0, 0, 0, .75);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ground: #15181b; --surface: #1e2327; --surface-sunk: #111417; --grid: #1b2024; --grid-major: #262d33;
  --line: #2d343a; --ink: #ebe8de; --ink-muted: #9aa1a6; --signal: #f2a93b; --signal-soft: #3d2d15;
  --trace: #f2a93b; --band: #8fb8d6; --band-soft: #1d2b36; --rec: #ff5a4e; --on-rec: #1a0b09;
  --ok: #63c38b; --warn: #e8b04a; --bad: #ff7a70; --focus: #8fb8d6;
  --shadow-raise: 0 14px 34px -12px rgba(0, 0, 0, .75);
  color-scheme: dark;
}

/* ---- base ---------------------------------------------------------------------------------------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 400 16px/1.5 var(--font-body);
  -webkit-font-smoothing: antialiased; }
a { color: inherit; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.num, time, .mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--ink-muted); }
.label { font: 600 11px/1.2 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-muted); }
.title { font: 700 22px/1.15 var(--font-display); letter-spacing: .06em; text-transform: uppercase; }
.heading { font: 600 18px/1.3 var(--font-body); }
.small { font-size: 14px; line-height: 1.4; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* graph paper: the light theme's ground, a faint grid on the dark screen */
.paper {
  background-color: var(--ground);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px), linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: calc(var(--grid-pitch) * 5) calc(var(--grid-pitch) * 5), calc(var(--grid-pitch) * 5) calc(var(--grid-pitch) * 5),
    var(--grid-pitch) var(--grid-pitch), var(--grid-pitch) var(--grid-pitch);
  background-attachment: fixed;
}

/* ---- app shell ----------------------------------------------------------------------------------- */
.app-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: var(--space-4);
  padding: calc(env(safe-area-inset-top, 0px) + var(--space-3)) max(var(--space-4), env(safe-area-inset-right, 0px)) var(--space-3) max(var(--space-4), env(safe-area-inset-left, 0px));
  background: color-mix(in srgb, var(--ground) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); }
.brand { font: 700 17px/1 var(--font-display); letter-spacing: .14em; text-transform: uppercase; text-decoration: none; }
.nav { display: none; gap: var(--space-1); }
.nav a { font: 600 15px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; text-decoration: none;
  color: var(--ink-muted); padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--surface-sunk); }
.app-header .station { margin-left: auto; }
.app-header form { margin: 0; }

.page { max-width: 1180px; margin: 0 auto; display: grid; gap: var(--space-5);
  padding-block: var(--space-4) calc(var(--tabbar-h) + env(safe-area-inset-bottom, 0px) + var(--space-6));
  padding-left: max(var(--space-4), env(safe-area-inset-left, 0px)); padding-right: max(var(--space-4), env(safe-area-inset-right, 0px)); }
.page > *, .col > * { min-width: 0; }
.col { display: grid; gap: var(--space-4); align-content: start; }

.tabbar { position: fixed; z-index: 10; left: 0; right: 0; bottom: 0; display: grid; grid-template-columns: repeat(4, 1fr);
  padding: 0 env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
  background: var(--surface); border-top: 1px solid var(--line); }
.tabbar a { height: var(--tabbar-h); display: grid; place-items: center; align-content: center; gap: 4px; text-decoration: none;
  font: 600 12px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-muted); }
.tabbar a svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.7; }
.tabbar a[aria-current="page"] { color: var(--signal); }

@media (min-width: 860px) {
  .nav { display: flex; }
  .tabbar { display: none; }
  .page { padding-block: var(--space-6) var(--space-7); }
  .page--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); align-items: start; }
}

/* ---- surfaces ------------------------------------------------------------------------------------ */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md); padding: var(--space-4); display: grid; gap: var(--space-3); }
.panel--sunk { background: var(--surface-sunk); }
.panel-head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap; }
.panel-head a { font: 600 14px var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--signal); text-decoration: none; }

/* ---- station status ------------------------------------------------------------------------------ */
.station { display: inline-flex; align-items: center; gap: var(--space-2); font: 500 12px/1.2 var(--font-mono); color: var(--ink-muted); white-space: nowrap; min-width: 0; }
.station span { overflow: hidden; text-overflow: ellipsis; }
.led { width: 9px; height: 9px; border-radius: 50%; background: var(--ink-muted); flex: none; }
.led--ok { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 22%, transparent); }
.led--rec { background: var(--rec); box-shadow: 0 0 0 3px color-mix(in srgb, var(--rec) 25%, transparent); }
.led--bad { background: var(--bad); }

/* ---- trace (sismographe) ------------------------------------------------------------------------- */
.trace { position: relative; border: 1px solid var(--grid-major); border-radius: var(--radius-sm); overflow: hidden; }
.trace canvas { display: block; width: 100%; height: 120px; }
.trace-axis { display: flex; justify-content: space-between; font: 500 10.5px var(--font-mono); color: var(--ink-muted); padding: 4px 2px 0; }

/* ---- level readout ------------------------------------------------------------------------------- */
.readout { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--space-2) var(--space-5); align-items: center; }
.readout-value { display: flex; align-items: baseline; gap: var(--space-2); }
.readout-value b { font: 600 56px/1 var(--font-display); letter-spacing: -.01em; font-variant-numeric: tabular-nums; }
.readout-value span { font: 500 13px var(--font-mono); color: var(--ink-muted); }
.meters { display: grid; gap: var(--space-2); }
.meter { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: var(--space-2); align-items: center; font: 500 12px var(--font-mono); color: var(--ink-muted); }
.meter-track { position: relative; height: 12px; border-radius: 2px; background: repeating-linear-gradient(90deg, var(--line) 0 3px, transparent 3px 5px); }
.meter-fill { position: absolute; inset: 0 auto 0 0; width: 0; transition: width .25s linear;
  background: repeating-linear-gradient(90deg, var(--signal) 0 3px, transparent 3px 5px); }
.meter--band .meter-fill { background: repeating-linear-gradient(90deg, var(--band) 0 3px, transparent 3px 5px); }
.meter-scale { display: flex; justify-content: space-between; margin-left: 72px; font: 500 10px var(--font-mono); color: var(--ink-muted); }
.readout-note { grid-column: 1 / -1; font: 500 12px var(--font-mono); color: var(--band); min-height: 1.4em; }
@media (max-width: 420px) { .readout { grid-template-columns: minmax(0, 1fr); } .readout-value b { font-size: 48px; } }

/* ---- trigger: the big button --------------------------------------------------------------------- */
.trigger-zone { display: grid; justify-items: center; gap: var(--space-3); padding-block: var(--space-3); }
.trigger { width: min(224px, 56vw); aspect-ratio: 1; max-width: 100%; border-radius: var(--radius-full); border: 0; cursor: pointer;
  display: grid; place-items: center; align-content: center; gap: var(--space-2); text-align: center; padding: var(--space-5);
  background: var(--rec); color: var(--on-rec); -webkit-tap-highlight-color: transparent;
  box-shadow: 0 0 0 8px var(--ground), 0 0 0 9px var(--rec), var(--shadow-raise);
  transition: transform .12s ease, background-color .2s ease; }
.trigger:active { transform: scale(.97); }
.trigger:disabled { cursor: default; background: var(--surface-sunk); color: var(--ink-muted); box-shadow: 0 0 0 8px var(--ground), 0 0 0 9px var(--line); }
.trigger-title { font: 700 clamp(24px, 7.4vw, 30px)/1.02 var(--font-display); letter-spacing: .08em; text-transform: uppercase; }
.trigger-sub { font: 500 12px/1.35 var(--font-mono); opacity: .9; max-width: 15ch; }
.trigger--recording { background: var(--ground); color: var(--rec); box-shadow: 0 0 0 3px var(--rec) inset, 0 0 0 8px var(--ground), 0 0 0 9px var(--rec); }
@media (prefers-reduced-motion: no-preference) {
  .trigger--recording { animation: breathe 2.4s ease-in-out infinite; }
  @keyframes breathe { 50% { box-shadow: 0 0 0 3px var(--rec) inset, 0 0 0 14px var(--ground), 0 0 0 15px color-mix(in srgb, var(--rec) 45%, transparent); } }
}
.field { width: 100%; font: 400 16px/1.4 var(--font-body); color: var(--ink); background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: var(--space-3); }
.field::placeholder { color: var(--ink-muted); }
.trigger-zone .field { max-width: 360px; }

/* ---- buttons, segmented control ------------------------------------------------------------------ */
.btn { font: 600 15px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 16px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); min-height: 44px; text-decoration: none; }
.btn:hover { border-color: var(--ink-muted); }
.btn--primary { background: var(--ink); color: var(--ground); border-color: var(--ink); }
.btn--quiet { background: transparent; border-color: transparent; color: var(--ink-muted); }
.segmented { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; }
.segmented button { font: 600 14px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; min-height: 44px;
  background: var(--surface); color: var(--ink-muted); border: 0; border-left: 1px solid var(--line); cursor: pointer; }
.segmented button:first-child { border-left: 0; }
.segmented button[aria-pressed="true"] { background: var(--signal-soft); color: var(--signal); }
.live-state { font: 500 12px var(--font-mono); color: var(--ink-muted); }
.live-state--on { color: var(--signal); }

.boost { display: grid; grid-template-columns: auto minmax(0, 1fr) 5.5em; gap: var(--space-2) var(--space-3); align-items: center; }
.boost input[type="range"] { width: 100%; accent-color: var(--signal); min-height: 32px; }
.boost output { font-size: 13px; text-align: right; color: var(--signal); }
.boost p { grid-column: 1 / -1; }

/* ---- stats --------------------------------------------------------------------------------------- */
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); }
.stat { display: grid; gap: 2px; }
.stat b { font: 600 28px/1.05 var(--font-display); font-variant-numeric: tabular-nums; }
.stat span { font-size: 13px; line-height: 1.3; color: var(--ink-muted); }

/* ---- event list, chips --------------------------------------------------------------------------- */
.events { list-style: none; margin: 0; padding: 0; }
.event-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px var(--space-3); align-items: center;
  padding: var(--space-3) 0; border-top: 1px solid var(--line); text-decoration: none; }
.events li:first-child .event-row { border-top: 0; }
.event-when { font: 600 16px/1.3 var(--font-body); }
.event-meta { grid-column: 1; font: 500 12px/1.4 var(--font-mono); color: var(--ink-muted); }
.event-row .chip { grid-row: 1 / span 2; grid-column: 2; }
.empty { color: var(--ink-muted); padding: var(--space-3) 0; }

.chip { display: inline-flex; align-items: center; gap: 6px; font: 600 11px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase;
  padding: 6px 8px; border-radius: var(--radius-sm); border: 1px solid var(--line); color: var(--ink-muted); white-space: nowrap; }
.chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.chip--squeak { color: var(--rec); border-color: color-mix(in srgb, var(--rec) 45%, transparent); }
.chip--not_squeak { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, transparent); }
.chip--unsure { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 45%, transparent); }
.chip--todo::before { background: transparent; border: 1.5px solid currentColor; }
.chip--rec { color: var(--on-rec); background: var(--rec); border-color: var(--rec); }

/* ---- event detail -------------------------------------------------------------------------------- */
.event-title { font: 700 30px/1.05 var(--font-display); letter-spacing: .02em; }
.event-sub { font: 500 13px/1.5 var(--font-mono); color: var(--ink-muted); }
.label-picker { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-2); }
.label-picker button { font: 600 15px/1.1 var(--font-display); letter-spacing: .06em; text-transform: uppercase; min-height: 52px;
  border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.label-picker button[aria-pressed="true"][data-label="squeak"] { background: var(--rec); border-color: var(--rec); color: var(--on-rec); }
.label-picker button[aria-pressed="true"][data-label="not_squeak"] { background: var(--ok); border-color: var(--ok); color: var(--ground); }
.label-picker button[aria-pressed="true"][data-label="unsure"] { background: var(--warn); border-color: var(--warn); color: var(--ground); }
textarea.field { min-height: 88px; resize: vertical; }
.saved { font: 500 12px var(--font-mono); color: var(--ok); min-height: 1.2em; }

.spectro { margin: 0; display: grid; gap: var(--space-2); }
.spectro img { width: 100%; height: auto; display: block; border-radius: var(--radius-sm); background: #15181b; }
.spectro figcaption { font: 500 12px var(--font-mono); color: var(--ink-muted); }
.player { display: grid; gap: 4px; }
.player audio { width: 100%; height: 40px; }
.player .label { display: flex; gap: var(--space-2); align-items: center; }
.private { color: var(--rec); }

.kv { width: 100%; border-collapse: collapse; font-size: 14px; }
.kv th { text-align: left; font-weight: 400; color: var(--ink-muted); padding: 8px var(--space-3) 8px 0; vertical-align: top; width: 48%; }
.kv td { padding: 8px 0; font-family: var(--font-mono); font-size: 13px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.kv tr + tr { border-top: 1px solid var(--line); }
.scroll-x { overflow-x: auto; }
.hash { font: 400 11px/1.5 var(--font-mono); color: var(--ink-muted); overflow-wrap: anywhere; }
.history { list-style: none; margin: 0; padding: 0; display: grid; }
.history li { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--space-3); padding: 8px 0; border-top: 1px solid var(--line); font-size: 14px; }
.history li:first-child { border-top: 0; }
.history time { font-size: 12px; color: var(--ink-muted); }
details.disclose > summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: baseline; }
details.disclose > summary::-webkit-details-marker { display: none; }
details.disclose > summary::after { content: "+"; font: 500 18px var(--font-mono); color: var(--ink-muted); }
details.disclose[open] > summary::after { content: "−"; }

/* ---- filters, timeline, calibration -------------------------------------------------------------- */
.filters { display: flex; gap: var(--space-2); flex-wrap: wrap; align-items: center; }
.filters .field { width: auto; flex: 1 1 140px; }
.daynav { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.daynav h1 { font: 700 26px/1.1 var(--font-display); letter-spacing: .04em; text-transform: uppercase; text-align: center; }
.chart { display: block; width: 100%; height: 260px; }
.legend { display: flex; gap: var(--space-4); flex-wrap: wrap; font: 500 12px var(--font-mono); color: var(--ink-muted); }
.legend i { display: inline-block; width: 14px; height: 3px; vertical-align: middle; margin-right: 6px; }
.suggestion { font: 500 14px/1.5 var(--font-body); }

/* ---- login --------------------------------------------------------------------------------------- */
.login { min-height: 100dvh; display: grid; place-items: center; padding-inline: max(var(--space-4), env(safe-area-inset-left, 0px)); }
.login form { width: min(380px, 100%); display: grid; gap: var(--space-4); }
.login .brand { font-size: 28px; }
.login label { display: grid; gap: var(--space-1); font-size: 14px; color: var(--ink-muted); }
.error { color: var(--bad); font-size: 14px; }