/* Zingy - "The Cutting Room" -------------------------------------------------
   A cutting-room timing chart for a media transfer bench. No frameworks, no
   webfonts (offline-safe, no external requests, no console errors).

   Typefaces, deliberately chosen from faces installed on the host:
     - Nimbus Sans Narrow : condensed industrial grotesque, the lettering you
                            find printed on film cans and bench equipment.
     - Bitstream Charter  : a real screen serif for body copy, the film-journal
                            voice. Not a system-UI default.
     - DejaVu Sans Mono   : tabular data only - timecode, percent, speed, ETA.
   No off-the-shelf UI faces, no webfonts, no emoji, no em dashes.
--------------------------------------------------------------------------- */

:root {
  --font-display: "Nimbus Sans Narrow", "Liberation Sans Narrow", "Arial Narrow", sans-serif;
  --font-body: "Bitstream Charter", "P052", Georgia, serif;
  --font-mono: "DejaVu Sans Mono", "Liberation Mono", monospace;

  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: 1.35rem;
  --step-3: 1.9rem;
  --step-4: 2.6rem;
}

/* Dark ground: cold slate, not near-black. */
:root[data-theme="dark"] {
  --ground: #20262B;
  --panel: #2A3137;
  --panel-2: #333C43;
  --ink: #ECE8E1;
  --ink-dim: #A7B1B6;
  --line: #3C464D;
  --line-strong: #55626B;
  --amber-text: #E5A22C;
  --amber-fill: #E5A22C;
  --teal-text: #7FCDD1;
  --teal-fill: #3E8F94;
  --error-text: #E68C82;
  --error-fill: #C4514A;
  --film: #1A1F23;
  --film-line: #38424A;
  --film-ink: #ECE8E1;
  --film-dim: #A7B1B6;
  --field-ink: #20262B;
}

/* Light ground: cool grey, panels sit lighter. */
:root[data-theme="light"] {
  --ground: #DFE1E0;
  --panel: #ECEEED;
  --panel-2: #F6F7F6;
  --ink: #1B2124;
  --ink-dim: #4A5459;
  --line: #B4BAB8;
  --line-strong: #8B9492;
  --amber-text: #7A5208;
  --amber-fill: #E5A22C;
  --teal-text: #1F6A6E;
  --teal-fill: #3E8F94;
  --error-text: #9E3B34;
  --error-fill: #C4514A;
  --film: #1A1F23;
  --film-line: #38424A;
  --film-ink: #ECE8E1;
  --film-dim: #A7B1B6;
  --field-ink: #1B2124;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { color-scheme: dark; }
:root[data-theme="light"] { color-scheme: light; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

/* Numbers are the design language. */
.num, .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

a { color: var(--teal-text); text-underline-offset: 3px; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--amber-fill);
  color: var(--field-ink);
  font-family: var(--font-display);
  padding: 10px 16px;
  z-index: 10;
}

.skip:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--amber-fill);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------- masthead */
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px clamp(16px, 4vw, 40px);
  border-bottom: 3px solid var(--line-strong);
  background: var(--panel);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }

.reel { display: inline-flex; color: var(--amber-text); }
.reel svg { width: 34px; height: 34px; display: block; animation: reel-spin 9s linear infinite; }

.brand__text { display: flex; flex-direction: column; line-height: 1.05; }

.wordmark {
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--ink);
}

.tagline {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

.lamp-wrap {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: 6px;
}

.lamp {
  width: 10px;
  height: 10px;
  background: var(--amber-fill);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.18);
  animation: lamp-pulse 2.4s steps(2, jump-none) infinite;
}

.lamp__text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ---------------------------------------------------------- theme switch */
.theme-switch {
  display: inline-flex;
  border: 2px solid var(--line-strong);
  background: var(--ground);
}

.theme-switch button {
  appearance: none;
  border: 0;
  border-right: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-dim);
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 8px 14px;
  cursor: pointer;
}

.theme-switch button:last-child { border-right: 0; }

.theme-switch button:hover { color: var(--ink); }

.theme-switch button[aria-pressed="true"] {
  background: var(--amber-fill);
  color: var(--field-ink);
}

/* --------------------------------------------------------------- layout */
.bench {
  width: min(1040px, 100%);
  margin: 0 auto;
  padding: clamp(20px, 4vw, 40px) clamp(16px, 4vw, 40px) 8px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  flex: 1 0 auto;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--line);
  padding-bottom: 6px;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.section-head .ref {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-dim);
}

.strip-toggle {
  margin-left: auto;
  appearance: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 13px;
  color: var(--ink-dim);
  background: transparent;
  border: 2px solid var(--line-strong);
}

.strip-toggle:hover { color: var(--ink); }

.strip-toggle[aria-pressed="true"] {
  background: var(--amber-fill);
  border-color: var(--amber-fill);
  color: var(--field-ink);
}

/* --------------------------------------------------------------- splice */
.splice__row {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.splice__row input {
  flex: 1;
  min-width: 0;
  padding: 13px 14px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--panel);
  border: 2px solid var(--line-strong);
  border-radius: 0;
}

.splice__row input::placeholder { color: var(--ink-dim); }

.splice__row input:focus {
  outline: none;
  border-color: var(--amber-text);
}

.hint {
  margin: 10px 0 0;
  max-width: 62ch;
  color: var(--ink-dim);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------- buttons */
.btn {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 13px 24px;
  border: 2px solid var(--line-strong);
  border-radius: 3px;
  background: var(--panel-2);
  color: var(--ink);
  white-space: nowrap;
}

.btn--amber {
  background: var(--amber-fill);
  border-color: var(--amber-fill);
  color: var(--field-ink);
}

.btn:hover:not(:disabled) { filter: brightness(1.08); }
.btn:active:not(:disabled) { transform: translateY(1px); }

.btn:disabled { opacity: 0.55; cursor: progress; }

/* The action spans its row so it lines up flush with the format select. */
.field--controls .btn { width: 100%; }

/* --------------------------------------------------------------- status */
.status {
  padding: 12px 14px;
  border-left: 6px solid var(--line-strong);
  background: var(--panel);
  color: var(--ink);
  font-size: 0.98rem;
  margin: 0;
}

.status--error { border-left-color: var(--error-fill); color: var(--error-text); }
.status--success { border-left-color: var(--teal-fill); }

/* --------------------------------------------------------------- skeleton */
.skeleton {
  border: 2px solid var(--line);
  background: var(--panel);
  padding: 18px;
  display: grid;
  gap: 12px;
}

.sk-bar {
  height: 16px;
  background:
    linear-gradient(90deg, var(--line) 0%, var(--panel-2) 45%, var(--line) 100%);
  background-size: 220% 100%;
  animation: skeleton-shimmer 1.5s linear infinite;
}

.sk-bar--title { height: 26px; width: 62%; }
.sk-bar--short { width: 38%; }
.sk-bar--wide { width: 88%; }

/* --------------------------------------------------------------- slate */
.slate {
  border: 2px solid var(--line-strong);
  background: var(--panel);
}

.slate__clap {
  padding: 5px 14px;
  background: var(--ground);
  border-bottom: 2px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.slate__body {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
}

.slate__frame {
  margin: 0;
  border-right: 2px solid var(--line);
  background: var(--film);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 168px;
  overflow: hidden;
}

.slate__frame img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  display: block;
  align-self: flex-start;
}

.slate__frame.is-empty::after {
  content: "NO FRAME";
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--film-dim);
  letter-spacing: 0.1em;
}

.slate__fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-content: start;
}

.field {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  min-width: 0;
}

.field--title { grid-column: 1 / -1; }
.field--select { grid-column: 1 / -1; border-right: 0; }
.field--controls { grid-column: 1 / -1; border-right: 0; border-bottom: 0; }

.field__k {
  display: block;
  font-family: var(--font-display);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 4px;
}

.field__v {
  display: block;
  font-size: 1.05rem;
  color: var(--ink);
  word-break: break-word;
}

.field__v .num { color: var(--amber-text); }

.field__v--title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.25;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.92rem;
  color: var(--ink);
}

.badge svg { width: 18px; height: 18px; display: block; }

.format-select {
  width: 100%;
  margin-top: 4px;
  padding: 11px 36px 11px 12px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  background-color: var(--panel-2);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23A7B1B6' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 12px 8px;
  border: 2px solid var(--line-strong);
  border-radius: 0;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

:root[data-theme="light"] .format-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%234A5459' stroke-width='2'/%3E%3C/svg%3E");
}

.format-select:focus { outline: none; border-color: var(--amber-text); }

/* --------------------------------------------------- academy leader ring */
.leader {
  border: 2px solid var(--line-strong);
  background: var(--panel);
  padding: 22px clamp(16px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(220px, 300px) 1fr;
  gap: 28px;
  align-items: center;
}

.leader__stage { position: relative; aspect-ratio: 1 / 1; width: 100%; }
.leader__stage svg { width: 100%; height: 100%; display: block; }

.leader__ring-track { fill: none; stroke: var(--line); stroke-width: 5; }
.leader__ring-fill { fill: none; stroke: var(--amber-fill); stroke-width: 5; stroke-linecap: butt; }
.leader__tick { stroke: var(--line-strong); stroke-width: 2; }
.leader__tick--major { stroke: var(--ink-dim); stroke-width: 3; }
.leader__rotor {
  transform-origin: 100px 100px;
  animation: leader-sweep 8s linear infinite;
}
.leader__rotor circle { fill: none; stroke: var(--teal-fill); stroke-width: 3; stroke-dasharray: 10 22; }
.leader__hand { stroke: var(--amber-text); stroke-width: 4; transform-origin: 100px 100px; }
.leader__hub { fill: var(--ink); }

.leader__readout {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.leader__pct {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 3.2rem;
  line-height: 1;
  color: var(--ink);
}

.leader__pct-unit {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.leader__data { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

.datum {
  border-top: 2px solid var(--line);
  padding-top: 8px;
}

.datum__k {
  display: block;
  font-family: var(--font-display);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.datum__v {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.1rem;
  color: var(--amber-text);
  word-break: break-word;
}

.leader__state {
  margin: 16px 0 0;
  font-size: 0.95rem;
  color: var(--ink-dim);
}

/* -------------------------------------------------------------- filmstrip */
.filmstrip {
  border-top: 2px solid var(--line-strong);
  border-bottom: 2px solid var(--line-strong);
  background: var(--film);
}

.sprockets {
  height: 16px;
  background-color: var(--film);
  background-image: repeating-linear-gradient(90deg,
    var(--ground) 0 7px, var(--film) 7px 24px);
  animation: sprocket-drift 1.4s linear infinite;
}

.filmstrip__viewport { overflow: hidden; padding: 10px 0; }

.filmstrip__track {
  display: flex;
  width: max-content;
  animation: filmstrip-scroll 46s linear infinite;
}

.filmstrip__set { display: flex; }

.filmstrip:hover .filmstrip__track,
.filmstrip.is-paused .filmstrip__track,
.filmstrip.is-paused .sprockets,
.filmstrip__viewport:focus-visible .filmstrip__track {
  animation-play-state: paused;
}

.filmstrip__viewport:focus-visible {
  outline: 3px solid var(--amber-fill);
  outline-offset: 2px;
}

.frame {
  flex: 0 0 auto;
  width: 138px;
  padding: 10px 8px;
  border-right: 2px solid var(--film-line);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: var(--film);
}

.frame__mark { display: flex; align-items: center; justify-content: center; height: 30px; }
.frame__mark svg { width: 28px; height: 28px; display: block; }

.frame__name {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--film-ink);
  text-align: center;
}

.filmstrip__note {
  margin: 10px 0 0;
  font-size: 0.92rem;
  color: var(--ink-dim);
}

/* --------------------------------------------------------------- prose */
.prose { max-width: 68ch; }

.prose .section-head { margin-top: 2px; }

.prose h3 {
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 26px 0 8px;
}

.prose p { margin: 0 0 12px; }

.prose .mono { color: var(--teal-text); }

/* --------------------------------------------------------------- footer */
.footer {
  border-top: 3px solid var(--line-strong);
  background: var(--panel);
  padding: 22px clamp(16px, 4vw, 40px) 34px;
  margin-top: 26px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  align-items: center;
}

.footer__links a {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--teal-text);
  text-decoration-thickness: 2px;
}

.footer__note {
  margin: 12px 0 0;
  max-width: 70ch;
  color: var(--ink-dim);
  font-size: 0.9rem;
}

/* --------------------------------------------------------------- motion */
@keyframes filmstrip-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes sprocket-drift {
  from { background-position-x: 0; }
  to { background-position-x: 24px; }
}

@keyframes lamp-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

@keyframes leader-sweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes reel-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes skeleton-shimmer {
  from { background-position: 120% 0; }
  to { background-position: -120% 0; }
}

/* --------------------------------------------------- responsive / mobile */
@media (max-width: 760px) {
  .slate__body { grid-template-columns: 1fr; }
  .slate__frame { border-right: 0; border-bottom: 2px solid var(--line); }
  .leader { grid-template-columns: 1fr; gap: 18px; }
  .leader__stage { max-width: 260px; margin: 0 auto; }
  .leader__data { grid-template-columns: 1fr; }
  .splice__row { flex-direction: column; }
  .wordmark { font-size: var(--step-2); }
}

/* --------------------------------------------------- reduced motion */
@media (prefers-reduced-motion: reduce) {
  .filmstrip__track,
  .sprockets,
  .lamp,
  .reel svg,
  .leader__rotor,
  .sk-bar {
    animation: none !important;
  }
}