/* SwingCoach — International Typographic Style on British Racing Green.
   Müller-Brockmann discipline: strict grid, dramatic scale contrast, whitespace
   as an active element, flush-left ragged-right, tabular figures, one accent.
   White on deep Jaguar green; brass (leather/wood) as the single accent.
   No border-radius, no shadow, no gradient, no decoration. */

:root {
  --green: #0a3a24;      /* British Racing Green — ground */
  --green-2: #06301d;    /* recessed fields */
  --green-deep: #05170e; /* video ground */
  --ink: #f4f1e9;        /* warm off-white — printed, not screen-white */
  --ink-pure: #ffffff;
  --muted: rgba(244, 241, 233, 0.5);
  --faint: rgba(244, 241, 233, 0.16);
  --rule: rgba(244, 241, 233, 0.16);
  --rule-2: rgba(244, 241, 233, 0.32);
  --brass: #c8a45c;      /* the single accent */
  --brass-soft: rgba(200, 164, 92, 0.12);
  --alert: #d98a6b;

  --font: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --emoji-font: "Noto Color Emoji", "Apple Color Emoji", "Segoe UI Emoji", sans-serif;

  --gap: 20px;           /* the layout margin — everything aligns to it */
  --u: 8px;              /* baseline unit */
}

* { margin: 0; padding: 0; box-sizing: border-box; border-radius: 0 !important; }
[hidden] { display: none !important; }

html, body {
  height: 100%;
  background: var(--green);
  color: var(--ink);
  font-family: var(--font), var(--emoji-font);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}

main {
  height: 100dvh;
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  border-inline: 1px solid var(--rule);
}

/* small caps micro-label — the organizing device */
.kicker {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

/* ---------- header ---------- */
#topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--gap);
  padding: calc(var(--u) * 2.5) var(--gap) calc(var(--u) * 1.5);
  border-bottom: 1px solid var(--rule-2);
}

.brand-block { display: flex; flex-direction: column; gap: 5px; }
.brand {
  font-size: 19px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1;
}
.brand .dot { color: var(--brass); }
.brand-sub {
  font-size: 9px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.stats { display: flex; align-items: stretch; }
.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  padding-left: calc(var(--u) * 2);
}
.stat + .stat { margin-left: calc(var(--u) * 2); border-left: 1px solid var(--rule); }
.stat-k {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
}
.pill {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1;
  white-space: nowrap;
}
.pill.armed { color: var(--brass); }
.pill.swinging { color: var(--ink-pure); }
.pill.cooldown { color: var(--muted); }
.pill.error { color: var(--alert); }
.count {
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

/* ---------- stage ---------- */
#stage {
  position: relative;
  flex: 1;
  min-height: 0;
  background: var(--green-deep);
  overflow: hidden;
}
#video, #overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
#stage.mirror #video, #stage.mirror #overlay { transform: scaleX(-1); }

#stage.stage-fs {
  position: fixed;
  inset: 0;
  z-index: 60;
  width: 100vw;
  height: 100dvh;
  max-width: none;
}

/* photo-credit caption, bottom-left */
.stage-caption {
  position: absolute;
  left: var(--gap);
  bottom: var(--u);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  z-index: 2;
}
.live-dot {
  width: 6px; height: 6px;
  background: var(--brass);
}

.fs-btn {
  position: absolute;
  top: var(--u);
  right: var(--gap);
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink);
  background: none;
  border: 1px solid var(--rule-2);
  cursor: pointer;
  z-index: 2;
}
.fs-btn svg { width: 18px; height: 18px; }
.fs-btn.on { color: var(--brass); border-color: var(--brass); }

/* pre-start instruction — a typographic block, not a boxed card */
#stage-msg {
  position: absolute;
  left: var(--gap);
  right: var(--gap);
  bottom: calc(var(--u) * 3.5);
  max-width: 36ch;
  border-top: 2px solid var(--brass);
  padding-top: calc(var(--u) * 1.5);
}
.msg-kicker {
  display: block;
  margin-bottom: var(--u);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--brass);
}
#stage-msg p {
  font-size: 17px;
  font-weight: 300;
  line-height: 1.4;
  letter-spacing: -0.005em;
}
#stage-msg b { font-weight: 700; }

/* ---------- feedback ---------- */
#feedback-card {
  padding: calc(var(--u) * 2) var(--gap) calc(var(--u) * 2.25);
  border-top: 2px solid var(--brass);
}
.fb-kicker {
  display: block;
  margin-bottom: calc(var(--u) * 1.25);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--brass);
}
#feedback-text {
  font-size: 25px;
  font-weight: 300;
  line-height: 1.22;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
#feedback-meta {
  display: block;
  margin-top: calc(var(--u) * 1.5);
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ---------- controls ---------- */
#controls {
  display: flex;
  gap: 1px;
  background: var(--rule-2);
  border-top: 1px solid var(--rule-2);
}
.btn {
  font-family: var(--font);
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  border: none;
  color: var(--ink);
  background: var(--green);
}
.btn.primary {
  flex: 1;
  font-size: 14px;
  letter-spacing: 0.28em;
  padding: calc(var(--u) * 2.5) 0;
  padding-bottom: calc(var(--u) * 2.5 + env(safe-area-inset-bottom));
  color: var(--green);
  background: var(--brass);
}
.btn.primary.stop {
  color: var(--ink);
  background: var(--green);
}
.btn.ghost {
  width: 72px;
  display: flex; align-items: center; justify-content: center;
  padding-bottom: env(safe-area-inset-bottom);
  color: var(--ink);
}
.btn.ghost svg { width: 24px; height: 24px; }
.btn:disabled { opacity: 0.4; }

/* ---------- settings: a Vignelli spec sheet ---------- */
#settings-panel {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: var(--green);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.sheet {
  max-width: 560px;
  min-height: 100%;
  margin: 0 auto;
  padding: calc(var(--u) * 4) var(--gap) calc(var(--u) * 4 + env(safe-area-inset-bottom));
  border-inline: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
}

.sheet-head {
  padding-bottom: calc(var(--u) * 2);
  border-bottom: 2px solid var(--rule-2);
  margin-bottom: calc(var(--u) * 1.5);
}
.sheet-kicker {
  display: block;
  margin-bottom: calc(var(--u) * 1.5);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--brass);
}
.sheet-head h2 {
  font-size: 40px;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 0.95;
}

/* each parameter: hanging number column + content column */
.param {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  column-gap: var(--u);
  padding: calc(var(--u) * 2.75) 0;
  border-bottom: 1px solid var(--rule);
}
.param.sub {
  padding: calc(var(--u) * 2) 0 calc(var(--u) * 2) 2.75rem;
  grid-template-columns: 1fr;
}
.param.sub .param-n { display: none; }
.param-n {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--brass);
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
}
.param-body { display: flex; flex-direction: column; gap: calc(var(--u) * 1.75); }
.param-k {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink);
}
.param-note { color: var(--muted); font-weight: 400; letter-spacing: 0.12em; }
.param-help {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.5;
  color: var(--muted);
  max-width: 46ch;
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 1.5);
}
.param-help b { color: var(--ink); font-weight: 500; }
.param-help p { margin: 0; }

/* numbered steps — brass hanging counters, generous rhythm */
.param-help ol.steps {
  list-style: none;
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 1.5);
}
.param-help ol.steps li {
  counter-increment: step;
  position: relative;
  padding-left: calc(var(--u) * 3.5);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.4;
}
.param-help ol.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--brass);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
}
.param-help .tip {
  padding-top: calc(var(--u) * 1.5);
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 13px;
}

/* text button with a hairline box — for in-sheet actions like "Prova voce" */
.btn.line {
  align-self: flex-start;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--rule-2);
  padding: 12px 20px;
}
.btn.line:active { border-color: var(--brass); color: var(--brass); }
.param-k output {
  float: right;
  color: var(--brass);
  font-variant-numeric: tabular-nums;
}

/* select — borderless with a hairline baseline and a drawn chevron */
.select-wrap { position: relative; }
.select-wrap::after {
  content: "";
  position: absolute;
  right: 2px; top: 50%;
  width: 8px; height: 8px;
  border-right: 1.5px solid var(--ink);
  border-bottom: 1.5px solid var(--ink);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}
#settings-panel select {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  font-family: inherit;
  font-size: 22px;
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule-2);
  padding: 0 24px calc(var(--u) * 1.25) 0;
  cursor: pointer;
}
#settings-panel select option { color: #000; }

/* segmented as flush option pairs with a brass baseline on the active one */
.seg { display: flex; gap: 0; }
.seg button {
  flex: 1;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-align: left;
  color: var(--muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--rule);
  padding: 0 8px calc(var(--u) * 1.25) 0;
  cursor: pointer;
  transition: color 0.12s;
}
.seg button + button { padding-left: 16px; }
.seg button.on {
  color: var(--ink-pure);
  font-weight: 700;
  border-bottom-color: var(--brass);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 20px;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track { height: 1px; background: var(--rule-2); }
input[type="range"]::-moz-range-track { height: 1px; background: var(--rule-2); }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  margin-top: -7px;
  background: var(--brass);
}
input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; border: none; background: var(--brass); }

input[type="file"] { font-family: inherit; font-size: 12px; color: var(--muted); }
input[type="file"]::file-selector-button {
  font-family: inherit;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--rule-2);
  padding: 10px 16px;
  margin-right: 14px;
  cursor: pointer;
}

#btn-close-settings {
  margin-top: calc(var(--u) * 4);
  padding: calc(var(--u) * 2.25) 0;
  font-size: 14px;
  letter-spacing: 0.28em;
}