/* Loudness Target Calculator — "measuring instrument" look, amber accent.
   © 2026 Graziano Melzi · OnAir Garage — MIT License */

:root {
  color-scheme: light;
  --bg: #e6dfcf;
  --face: #f6f2e7;
  --face2: #ece6d6;
  --line: #c8bda3;
  --ink: #1d1a14;
  --ink2: #5a513f;
  --accent: #9a5a00;          /* amber, tuned for contrast on light faces */
  --accent-ink: #ffffff;
  --warn: #b3261e;
  --warn-bg: #fbe9e6;
  --ok: #2f6b2f;
  --focus: #9a5a00;
  --shadow: 0 1px 0 rgba(255,255,255,.7) inset, 0 2px 8px rgba(60,45,10,.12);
  /* the LCD window stays dark in both themes, like a real display */
  --lcd-bg: #0d0b08;
  --lcd-ink: #ffb000;
  --lcd-dim: #b98a2a;
  --lcd-warn: #ff6b4a;
  --font-ui: "Barlow Condensed", "Arial Narrow", system-ui, sans-serif;
  --font-num: "Share Tech Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #100e0b; --face: #1b1813; --face2: #241f18; --line: #3b3427;
    --ink: #efe6d2; --ink2: #b0a68e; --accent: #ffb000; --accent-ink: #1a1200;
    --warn: #ff6b4a; --warn-bg: #2c1611; --ok: #8fd18f; --focus: #ffb000;
    --shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 2px 10px rgba(0,0,0,.5);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #100e0b; --face: #1b1813; --face2: #241f18; --line: #3b3427;
  --ink: #efe6d2; --ink2: #b0a68e; --accent: #ffb000; --accent-ink: #1a1200;
  --warn: #ff6b4a; --warn-bg: #2c1611; --ok: #8fd18f; --focus: #ffb000;
  --shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 2px 10px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; min-height: 100dvh; background: var(--bg); color: var(--ink);
  font-family: var(--font-ui); font-size: 18px; line-height: 1.35;
  padding: 0 max(16px, env(safe-area-inset-right)) env(safe-area-inset-bottom) max(16px, env(safe-area-inset-left));
}
button, select, .signbtn { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
.hidden, [hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; top: 8px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
a { color: var(--accent); }

/* ---------- top bar ---------- */
.topbar { max-width: 1040px; margin: 0 auto; padding: max(18px, env(safe-area-inset-top)) 0 14px; display: flex; flex-wrap: wrap; gap: 14px 24px; align-items: center; justify-content: space-between; }
.brand { display: flex; gap: 12px; align-items: center; }
.brand__icon { border-radius: 6px; }
.brand__title { margin: 0; font-size: 24px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; line-height: 1.1; }
.brand__sub { margin: 2px 0 0; color: var(--ink2); font-size: 16px; letter-spacing: .02em; }
.controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
.ctl { display: flex; flex-direction: column; gap: 2px; }
.ctl__label { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink2); }

select, input[type="text"] {
  font: inherit; color: var(--ink); background: var(--face); border: 1px solid var(--line);
  border-radius: 6px; padding: 8px 10px; min-height: 44px; width: 100%;
}
select { cursor: pointer; }
.ctl select { width: auto; min-width: 96px; }
.btn {
  font: inherit; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; cursor: pointer;
  min-height: 44px; padding: 8px 16px; border-radius: 6px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--accent-ink);
}
.btn--ghost { background: transparent; color: var(--accent); }
.btn:hover { filter: brightness(1.08); }

/* ---------- instrument layout ---------- */
.instrument {
  max-width: 1040px; margin: 0 auto; display: grid; gap: 16px;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  grid-template-areas: "panel inputs" "panel info";
  align-items: start;
}
.panel { grid-area: panel; background: var(--face); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); padding: 16px; display: grid; gap: 16px; }
.inputs { grid-area: inputs; }
.info { grid-area: info; }
.inputs, .info { background: var(--face); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); padding: 16px; }

/* ---------- LCD display ---------- */
.lcd {
  background: var(--lcd-bg); color: var(--lcd-ink); border-radius: 8px; padding: 16px 20px 14px;
  border: 1px solid #000; box-shadow: inset 0 0 0 1px #2a2110, inset 0 6px 24px rgba(0,0,0,.8);
}
.lcd__label { margin: 0; font-size: 14px; letter-spacing: .16em; text-transform: uppercase; color: var(--lcd-dim); }
.lcd__row { margin: 0; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.lcd__value {
  font-family: var(--font-num); font-size: clamp(56px, 13vw, 112px); line-height: 1.05;
  color: var(--lcd-ink); text-shadow: 0 0 14px rgba(255,176,0,.45); letter-spacing: .02em;
  overflow-wrap: anywhere;
}
.lcd__unit { font-size: clamp(24px, 5vw, 36px); font-weight: 600; color: var(--lcd-dim); letter-spacing: .08em; }
.lcd__status { margin: 4px 0 0; font-size: 17px; color: var(--lcd-dim); min-height: 1.4em; }
.lcd[data-state="idle"] .lcd__value { color: #6b5320; text-shadow: none; }
.lcd[data-state="warn"] .lcd__value { color: var(--lcd-warn); text-shadow: 0 0 14px rgba(255,107,74,.45); }
.lcd[data-state="warn"] .lcd__status { color: var(--lcd-warn); }

/* ---------- readouts ---------- */
.readouts { margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.readout { background: var(--face2); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; min-width: 0; }
.readout dt { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink2); }
.readout dd { margin: 0; }
.readout__val { font-family: var(--font-num); font-size: 26px; }
.readout__unit { font-size: 13px; letter-spacing: .08em; color: var(--ink2); }
.readout__note { font-size: 14px; color: var(--ink2); }
#rdTpCell[data-state="over"] .readout__val { color: var(--warn); }
#rdTpCell[data-state="ok"] .readout__val { color: var(--ok); }

/* ---------- scale ---------- */
.scale__label { margin: 0 0 6px; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink2); }
.scale__track { position: relative; height: 64px; margin: 34px 2px 0; background: var(--face2); border: 1px solid var(--line); border-radius: 4px; }
.scale__ticks { position: absolute; inset: 0; }
.tick { position: absolute; bottom: 0; width: 1px; height: 6px; background: var(--ink2); opacity: .7; }
.tick--major { height: 12px; opacity: 1; }
.scale__nums { position: relative; height: 0; margin: -30px 2px 0; z-index: 1; pointer-events: none; }
.scale__nums span { position: absolute; top: 0; transform: translateX(-50%); font-family: var(--font-num); font-size: 14px; color: var(--ink2); }
.scale__band { position: absolute; top: 0; bottom: 0; background: color-mix(in srgb, var(--accent) 22%, transparent); border-left: 1px dashed var(--accent); border-right: 1px dashed var(--accent); }
.scale__span { position: absolute; top: 18px; height: 8px; background: var(--accent); border-radius: 2px; opacity: .9; }
.scale__span--warn { background: var(--warn); }
.scale__mark { position: absolute; top: -8px; bottom: -8px; width: 0; border-left: 2px solid var(--ink); }
.scale__mark--target { border-left-color: var(--accent); border-left-width: 3px; }
.scale__mark--result { border-left-color: var(--ok); }
.scale__mark--safe { border-left: 2px dashed var(--warn); }
.scale__tag { position: absolute; transform: translateX(-50%); white-space: nowrap; font-size: 14px; font-weight: 700; letter-spacing: .08em; padding: 1px 6px; border-radius: 3px; background: var(--ink); color: var(--bg); }
.scale__mark--target .scale__tag { background: var(--accent); color: var(--accent-ink); }
.scale__mark--result .scale__tag { background: var(--ok); color: #fff; }
:root[data-theme="dark"] .scale__mark--result .scale__tag { color: #0d200d; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .scale__mark--result .scale__tag { color: #0d200d; } }
.scale__mark--safe .scale__tag { background: var(--warn); color: #fff; }
.scale__mark--top .scale__tag { bottom: 100%; margin-bottom: 2px; }
.scale__mark--bottom .scale__tag { top: 100%; margin-top: 2px; }
.scale__legend { list-style: none; margin: 68px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 15px; color: var(--ink2); }
.lg::before { content: ""; display: inline-block; width: 12px; height: 12px; margin-right: 6px; vertical-align: -1px; border-radius: 2px; background: var(--ink); }
.lg--target::before { background: var(--accent); }
.lg--result::before { background: var(--ok); }
.lg--safe::before { background: var(--warn); }

/* ---------- warning ---------- */
.warn { background: var(--warn-bg); border: 1px solid var(--warn); border-left-width: 6px; border-radius: 6px; padding: 10px 14px; }
.warn__title { margin: 0; font-weight: 700; font-size: 18px; letter-spacing: .06em; text-transform: uppercase; color: var(--warn); }
.warn__body { margin: 4px 0 0; }

/* ---------- inputs ---------- */
.inputs { display: grid; gap: 14px; }
.field label { display: block; font-size: 14px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink2); margin-bottom: 4px; }
.field__box { display: flex; align-items: stretch; background: var(--face); border: 1px solid var(--line); border-radius: 6px; }
.field__box:focus-within { outline: 2px solid var(--focus); outline-offset: 2px; }
.field__box input { flex: 1 1 auto; min-width: 0; border: 0; background: transparent; font-family: var(--font-num); font-size: 24px; min-height: 52px; }
.field__box input:focus-visible { outline: none; }
.field__unit { align-self: center; padding: 0 10px; font-size: 14px; letter-spacing: .08em; color: var(--ink2); pointer-events: none; }
.signbtn { flex: 0 0 auto; min-width: 48px; border: 0; border-left: 1px solid var(--line); background: var(--face2); color: var(--accent); font-family: var(--font-num); font-size: 22px; cursor: pointer; border-radius: 0 5px 5px 0; }
.signbtn:active { filter: brightness(.9); }
.field__hint { margin: 4px 0 0; font-size: 14px; color: var(--ink2); }
.field__err { margin: 4px 0 0; font-size: 15px; color: var(--warn); font-weight: 600; }
.custom { display: grid; gap: 14px; }

/* ---------- info ---------- */
.info__head { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; justify-content: space-between; }
.info__name { margin: 0; font-size: 22px; letter-spacing: .06em; text-transform: uppercase; }
.badge { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; font-weight: 700; padding: 2px 8px; border-radius: 3px; }
.badge--official { background: var(--accent); color: var(--accent-ink); }
.badge--reco { border: 1px dashed var(--accent); color: var(--accent); }
.badge--hidden { display: none; }
.info__grid { margin: 10px 0 0; display: grid; gap: 6px; }
.info__grid > div { display: grid; grid-template-columns: 8.5em 1fr; gap: 8px; }
.info__grid dt { color: var(--ink2); font-size: 14px; letter-spacing: .08em; text-transform: uppercase; padding-top: 2px; }
.info__grid dd { margin: 0; font-family: var(--font-ui); }
.info__grid small { color: var(--ink2); font-size: 15px; }
.info__note { margin: 10px 0 0; font-size: 16px; color: var(--ink2); border-left: 3px solid var(--accent); padding-left: 10px; }
.info__note:empty { display: none; }
.play { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); }
.play__title { margin: 0; font-size: 14px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink2); }
.play__body { margin: 4px 0 0; }
.play__hint { margin: 6px 0 0; font-size: 15px; color: var(--ink2); }

/* ---------- footer, help, update banner ---------- */
.foot { max-width: 1040px; margin: 20px auto 0; padding: 12px 0 24px; font-size: 15px; color: var(--ink2); display: flex; flex-wrap: wrap; gap: 4px 10px; }
.help { width: min(680px, calc(100% - 24px)); max-height: calc(100vh - 32px); padding: 0; border: 1px solid var(--line); border-radius: 10px; background: var(--face); color: var(--ink); box-shadow: 0 10px 40px rgba(0,0,0,.45); }
.help::backdrop { background: rgba(0,0,0,.6); }
.help__head { position: sticky; top: 0; z-index: 1; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 18px; background: var(--face); border-bottom: 1px solid var(--line); }
.help__head h2 { margin: 0; font-size: 22px; letter-spacing: .06em; text-transform: uppercase; }
.help__body { padding: 4px 18px 20px; }
.help__body h3 { margin: 16px 0 2px; font-size: 17px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.help__body p { margin: 0; font-size: 18px; }
.update { position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; flex-wrap: wrap; align-items: center; gap: 10px; background: var(--face); border: 1px solid var(--accent); border-radius: 8px; padding: 10px 14px; box-shadow: var(--shadow); z-index: 20; }

/* ---------- narrow screens: LCD first, then inputs, then the rest ---------- */
@media (max-width: 860px) {
  .instrument { display: flex; flex-direction: column; align-items: stretch; max-width: 680px; }
  .panel { display: contents; }
  .instrument > .inputs { order: 2; }
  .instrument > .info { order: 6; }
  .panel > .lcd { order: 1; }
  .panel > .readouts, .panel > .scale, .panel > .warn { background: var(--face); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); padding: 14px; }
  .panel > .readouts { order: 3; }
  .panel > .scale { order: 4; }
  .panel > .warn { order: 5; border-left-width: 6px; background: var(--warn-bg); border-color: var(--warn); }
  .topbar, .foot { max-width: 680px; }
}
@media (max-width: 560px) {
  body { font-size: 17px; }
  .readouts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topbar { padding-bottom: 10px; gap: 10px; }
  .brand__title { font-size: 19px; }
  .brand__sub { font-size: 15px; }
  .controls { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-items: end; }
  .controls .ctl select { width: 100%; }
  .controls .btn { width: 100%; padding: 8px 10px; }
  .lcd { padding: 12px 14px 10px; }
  .lcd__value { font-size: clamp(52px, 19vw, 76px); }
  .lcd__status { font-size: 16px; }
  .inputs, .info { padding: 14px; }
  .field__box input { font-size: 22px; }
  .info__grid > div { grid-template-columns: 1fr; gap: 0; }
  .scale__tag { font-size: 13px; padding: 1px 4px; }
  .scale__nums span { font-size: 12px; }
  .help { width: calc(100% - 16px); max-height: calc(100dvh - 16px); }
  .help__body p, .help__body li { font-size: 17px; }
  .update { width: calc(100% - 24px); }
}
@media (max-width: 860px) and (min-width: 561px) {
  .readouts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-height: 480px) and (orientation: landscape) {
  .topbar { padding-top: 8px; padding-bottom: 8px; }
  .brand__sub { display: none; }
}
@media (prefers-reduced-motion: no-preference) {
  .scale__span, .scale__mark, .scale__band { transition: left .2s ease, width .2s ease; }
}

/* ---------- measure from file ---------- */
.measure { border-bottom: 1px solid var(--line); padding-bottom: 14px; }
.measure__title { margin: 0; font-size: 20px; letter-spacing: .06em; text-transform: uppercase; }
.measure__hint { margin: 2px 0 10px; color: var(--ink2); font-size: 16px; }
.measure__row { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; }
.linkbtn { font: inherit; background: none; border: 0; padding: 8px 0; min-height: 44px; color: var(--accent); text-decoration: underline; cursor: pointer; }
.measure__prog { width: 100%; height: 10px; margin-top: 10px; accent-color: var(--accent); }
.measure__status { margin: 10px 0 0; font-size: 17px; }
.measure__status[data-kind="error"] { color: var(--warn); font-weight: 600; }
.measure__status:empty { display: none; }
.measure__notes { margin: 6px 0 0; padding-left: 18px; color: var(--ink2); font-size: 15px; }
.measure__notes:empty { display: none; }
.help__body ul { margin: 4px 0 0; padding-left: 20px; }
.help__body li { font-size: 18px; margin: 4px 0; }
.help__sources li { font-size: 17px; }
.measure__status { white-space: pre-line; }

/* ---------- movable target on the scale ---------- */
.scale__head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 12px; margin-bottom: 6px; }
.scale__head .scale__label { margin: 0; }
.lock { display: inline-flex; align-items: center; gap: 6px; font: inherit; font-size: 15px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; min-height: 40px; padding: 4px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--face2); color: var(--ink2); cursor: pointer; }
.lock[aria-checked="false"] { border-color: var(--accent); color: var(--accent); }
.lock[aria-checked="true"] .lock__ico--open, .lock[aria-checked="false"] .lock__ico--closed { display: none; }
.scale__hint { margin: 12px 0 0; font-size: 15px; color: var(--ink2); }
.scale--editable .scale__track { cursor: grab; touch-action: none; user-select: none; -webkit-user-select: none; }
.scale--dragging .scale__track { cursor: grabbing; }
.scale--editable .scale__track::before, .scale--editable .scale__track::after { position: absolute; top: 4px; z-index: 2; font-size: 30px; line-height: 1; color: var(--accent); opacity: .75; pointer-events: none; }
.scale--editable .scale__track::before { content: "\2039"; left: 6px; }
.scale--editable .scale__track::after { content: "\203A"; right: 6px; }
.scale__mark--edge-l .scale__tag { transform: none; }
.scale__mark--edge-r .scale__tag { transform: translateX(-100%); }
.scale__mark--target:focus-visible { outline: none; }
.scale__mark--target:focus-visible .scale__tag { outline: 2px solid var(--focus); outline-offset: 2px; }