/*
 * Sabre Motion Lab: a dark workbench around a sheet of paper.
 *
 * The controls sit on near-black panels with one amber accent; the stage is a
 * warm paper card where the fencers are drawn in ink. Condensed type keeps the
 * many labels short: Big Shoulders Display for headings, IBM Plex Sans
 * Condensed for text and IBM Plex Mono for numbers, all bundled with the page.
 */

@font-face {
  font-family: "Big Shoulders Display";
  src: url("../fonts/big-shoulders-display-latin-variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans Condensed";
  src: url("../fonts/ibm-plex-sans-condensed-latin-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans Condensed";
  src: url("../fonts/ibm-plex-sans-condensed-latin-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans Condensed";
  src: url("../fonts/ibm-plex-sans-condensed-latin-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono-latin-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* ---------- Tokens ---------- */

:root {
  --bg: #101214;
  --panel: #16191c;
  --panel-line: #262b30;
  --selected: #262b30;
  --line: #343a40;
  --line-quiet: #2c3136;
  --line-hover: #59616a;
  --field: #0f1113;
  --field-line: #2c3238;
  --text: #ece8df;
  --text-soft: #d5d1c8;
  --text-field: #dcd8cf;
  --text-quiet: #b4bbc2;
  --muted: #9ba3ab;
  --dot-off: #4a5158;
  --accent: #f2b33d;
  --accent-hover: #ffd27a;
  --accent-ink: #1a1408;
  --ok: #8fd19e;
  --warn: #f2b33d;
  --error: #ff8a7a;

  /* The stage: paper, ink and two fencers' whites. */
  --paper: #e9e6df;
  --floor: #cbc5b9;
  --ghost: #a39c8f;
  --ink: #1d1b18;
  --hair-grey: #7a746a;
  --fencer-a: #f6f3ec;
  --fencer-b: #e0dacd;
  --fencer-b-trousers: #cdc6b5;
  --fencer-b-face: #ebe6da;
  --steel: #eceae4;
  --steel-shade: #dfdbd2;
  --trail-a: #9a3a27;
  --trail-b: #2f4f7f;

  --font-display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans Condensed", "Arial Narrow", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

/* ---------- Base ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent-hover);
}

button {
  font-family: inherit;
  cursor: pointer;
}

button:disabled {
  cursor: default;
}

input[type="range"] {
  accent-color: var(--accent);
  margin: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

[hidden],
.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 10;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 16px;
}

.mono {
  font-family: var(--font-mono);
}

/* ---------- Page ---------- */

.page {
  box-sizing: content-box;
  max-width: 1400px;
  margin: 0 auto;
  padding: 28px 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 24px;
}

.masthead__title {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.masthead h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 46px;
  line-height: 0.95;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.masthead__tagline {
  font-size: 16px;
  color: var(--muted);
  text-wrap: pretty;
}

.modes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.noscript {
  color: var(--warn);
  font-size: 16px;
}

.workspace {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: flex-start;
}

/* Side by side when there is room for both, otherwise stacked; the stage
   column takes nearly all the width the side column does not need. */
.workspace__main {
  flex: 999 1 640px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.workspace__side {
  flex: 1 1 340px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.site-footer {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- Panels ---------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 16px;
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
}

.panel--stage {
  gap: 14px;
}

.panel--phrase {
  gap: 10px;
}

.panel--adjust {
  gap: 16px;
}

.panel--poses {
  gap: 12px;
}

.panel--detail,
.panel--scene,
.panel--library,
.panel--bases,
.panel--step {
  gap: 14px;
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 6px 16px;
}

.panel__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  overflow-wrap: anywhere;
}

.panel__intro {
  font-size: 15px;
  color: var(--muted);
  text-wrap: pretty;
}

.control-label {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}

/* ---------- Buttons ---------- */

/* The modes, speeds and the fencer picker: amber when chosen. */
.mode-button,
.speed-button,
.fencer-button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
}

.mode-button[aria-pressed="true"],
.speed-button[aria-pressed="true"],
.fencer-button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.mode-button {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
}

.speed-button {
  min-width: 50px;
  height: 44px;
  padding: 0 8px;
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 14px;
}

.fencer-button {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
}

.fencer-button:disabled {
  opacity: 0.35;
}

/* Toggles, steps, poses, scenes and postures: outlined in amber when on. */
.toggle,
.step-button,
.pose-button,
.scene-button,
.base-button {
  border: 1px solid var(--line-quiet);
  background: transparent;
  color: var(--text);
  border-radius: 10px;
  font-size: 14px;
  text-align: left;
}

.toggle {
  border-color: var(--line);
}

.toggle[aria-pressed="true"],
.step-button[aria-pressed="true"],
.pose-button[aria-pressed="true"],
.scene-button[aria-pressed="true"],
.base-button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--selected);
}

.icon-button,
.outline-button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
}

.mode-button:not([aria-pressed="true"]):hover,
.speed-button:not([aria-pressed="true"]):hover,
.fencer-button:not([aria-pressed="true"]):enabled:hover,
.toggle:not([aria-pressed="true"]):hover,
.step-button:not([aria-pressed="true"]):hover,
.pose-button:not([aria-pressed="true"]):enabled:hover,
.scene-button:not([aria-pressed="true"]):hover,
.base-button:not([aria-pressed="true"]):hover,
.icon-button:hover,
.outline-button:enabled:hover {
  border-color: var(--line-hover);
}

.icon-button {
  width: 44px;
  height: 44px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
}

.play-button {
  width: 60px;
  height: 44px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: var(--accent-ink);
}

.play-button:hover {
  background: var(--accent-hover);
}

.icon {
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon--outline {
  fill: none;
  stroke-width: 2;
}

.icon--pause {
  fill: none;
  stroke-width: 2.6;
}

.icon--play {
  fill: currentColor;
  stroke-width: 1.5;
}

.outline-button {
  align-self: flex-start;
  height: 44px;
  padding: 0 14px;
  border-radius: 10px;
  font-size: 14px;
}

/* ---------- Stage ---------- */

.stage__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
}

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

.stage__count,
.stage__time {
  font-size: 13px;
  white-space: nowrap;
}

.stage__count {
  color: var(--muted);
}

.stage__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
}

.stage__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--muted);
}

.legend {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend__dot {
  box-sizing: content-box;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--text);
}

.legend__dot--a {
  background: var(--fencer-a);
}

.legend__dot--b {
  background: var(--fencer-b);
}

.stage__view {
  display: block;
  width: 100%;
  height: auto;
  background: var(--paper);
  border-radius: 10px;
}

/* A phrase for one fencer hides everything of fencer B, and the legend that
   tells two fencers apart. */
.panel--stage.is-solo .fencer-b,
.panel--stage.is-solo .legend {
  display: none;
}

.floor {
  fill: none;
  stroke: var(--floor);
  stroke-width: 0.45;
}

.ghosts {
  fill: none;
  stroke: var(--ghost);
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ghost {
  stroke-width: 0.9;
}

.ghost--1 {
  opacity: 0.6;
}

.ghost--2 {
  opacity: 0.45;
}

.ghost--3 {
  opacity: 0.3;
}

.ghost--4 {
  opacity: 0.18;
}

.ghost-blade {
  stroke-width: 0.6;
}

.ghost-blade--1 {
  opacity: 0.65;
}

.ghost-blade--2 {
  opacity: 0.5;
}

.ghost-blade--3 {
  opacity: 0.35;
}

.ghost-blade--4 {
  opacity: 0.22;
}

.ink {
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ground {
  fill: var(--ink);
  stroke: none;
}

.fencer--a {
  --fencer: var(--fencer-a);
  --hair: var(--ink);
}

.fencer--b {
  --fencer: var(--fencer-b);
  --hair: var(--hair-grey);
}

/* Each layer is drawn twice: the line of ink round every shape, then the shapes
   filled over it, which hides the line where one part lies on another, so
   overlapping parts read as one silhouette. */
.figure__outline {
  fill: var(--ink);
  stroke: none;
}

.figure__fill {
  fill: var(--fencer);
  stroke: none;
}

/* The older man's trousers are a shade darker than his jersey, and his face is paper. */
.fencer--b .figure__fill--trousers {
  fill: var(--fencer-b-trousers);
}

.fencer--b .figure__fill--face {
  fill: var(--fencer-b-face);
}

/* The hair, drawn in strokes of the pen. */
.figure__hair {
  fill: var(--hair);
  stroke: none;
}

/* Brush strokes: tapered shapes of ink, for the shading and the heavy lines. */
.figure__ink {
  fill: var(--ink);
  stroke: none;
}

.figure__detail {
  fill: none;
  stroke: var(--ink);
  stroke-width: 0.42;
  stroke-linecap: round;
}

/* The sabre: a blade of ink, and the bell guard in light steel with a line of
   ink round it, shaded inside. */
.blade__steel,
.blade__outline,
.blade__shade {
  fill: var(--ink);
  stroke: none;
}

.blade__guard {
  fill: var(--steel);
  stroke: none;
}

.blade__inside {
  fill: var(--steel-shade);
  stroke: none;
}

.blade__rim {
  fill: none;
  stroke: var(--ink);
  stroke-width: 0.35;
  stroke-linecap: round;
}

.trails {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.trail {
  stroke-width: 1.3;
  stroke-dasharray: 0.1 2.6;
}

.trail--full {
  stroke-width: 1.1;
  opacity: 0.35;
}

.trail--a {
  stroke: var(--trail-a);
}

.trail--b {
  stroke: var(--trail-b);
}

/* ---------- Transport ---------- */

.transport {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.transport__buttons {
  display: flex;
  gap: 6px;
}

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

.speed__options {
  display: flex;
  gap: 4px;
}

.toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.toggle {
  height: 44px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dot-off);
}

.toggle[aria-pressed="true"] .toggle__dot {
  background: var(--accent);
}

.camera {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1 1 220px;
  min-width: 200px;
}

.camera input {
  flex: 1 1 auto;
  min-width: 0;
}

.camera__value {
  font-size: 13px;
  min-width: 40px;
  text-align: right;
}

.timeline {
  width: 100%;
}

.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.step-button,
.base-button {
  max-width: 100%;
  min-height: 44px;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-quiet);
  overflow-wrap: anywhere;
}

.step-button[aria-pressed="true"],
.base-button[aria-pressed="true"] {
  color: var(--text);
}

.step-button__number {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

/* ---------- Phrase data ---------- */

.phrase-status {
  font-size: 14px;
  color: var(--ok);
}

.phrase-status--warn {
  color: var(--warn);
}

.phrase-status--error {
  color: var(--error);
}

.phrase-text {
  width: 100%;
  height: 300px;
  resize: vertical;
  margin: 0;
  padding: 14px;
  background: var(--field);
  color: var(--text-field);
  border: 1px solid var(--field-line);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  white-space: pre;
  scrollbar-color: var(--line) var(--field);
}

/* ---------- Adjust this moment ---------- */

.adjust__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.adjust__heading {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.adjust__target {
  font-size: 14px;
  color: var(--muted);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.fencer-pick {
  display: flex;
  gap: 4px;
}

.joints {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.joint {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.joint__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
}

.joint__row label {
  color: var(--text-soft);
}

.joint__value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}

.joint input {
  width: 100%;
}

/* ---------- Poses ---------- */

.poses {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pose-button {
  min-height: 44px;
  padding: 6px 12px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
}

.pose-button__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
}

/* ---------- Lists: the practice library and the base postures ---------- */

.list-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.list-group__title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.scene-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.scene-button {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
}

.scene-button__title {
  font-size: 15px;
  font-weight: 500;
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.scene-button__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
}

.scene-button__event {
  font-size: 13px;
  color: var(--text-quiet);
  overflow-wrap: anywhere;
}

.base-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.base-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ---------- What is on stage, in words ---------- */

.tag {
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.detail__text {
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-soft);
  text-wrap: pretty;
}

.facts {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fact {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 2px 16px;
}

.fact dt {
  padding-top: 1px;
  font-size: 13px;
  color: var(--muted);
}

.fact dd {
  margin: 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.45;
  color: var(--text-soft);
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.fact dd.is-empty {
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.outline-button--danger:enabled:hover {
  border-color: var(--error);
  color: var(--error);
}

.outline-button:disabled,
.primary-button:disabled {
  opacity: 0.4;
}

.primary-button {
  height: 44px;
  padding: 0 18px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 14px;
  font-weight: 600;
}

.primary-button:enabled:hover {
  background: var(--accent-hover);
}

/* ---------- Fields ---------- */

.fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.field--wide {
  grid-column: 1 / -1;
}

.field__label {
  font-size: 13px;
  color: var(--muted);
}

.field__input {
  width: 100%;
  min-height: 44px;
  margin: 0;
  padding: 9px 12px;
  background: var(--field);
  color: var(--text-field);
  border: 1px solid var(--field-line);
  border-radius: 10px;
  font: inherit;
  font-size: 15px;
}

.field__input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.field__input:disabled {
  opacity: 0.4;
}

/* The Creator's fields wait while the phrase data has an error. */
.pose-button:disabled,
.joint input:disabled,
.check input:disabled {
  opacity: 0.4;
}

.field__input--note {
  min-height: 0;
  resize: vertical;
  line-height: 1.45;
}

.field__input--number {
  font-family: var(--font-mono);
  font-size: 14px;
}

.field__hint {
  font-size: 13px;
  color: var(--muted);
  text-wrap: pretty;
}

.field__hint:empty {
  display: none;
}

.field__hint--error {
  color: var(--error);
}

.check {
  align-self: flex-start;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--text-soft);
  cursor: pointer;
}

.check input {
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--accent);
}

@media (max-width: 560px) {
  /* Three modes share a row, however narrow it is. */
  .modes {
    width: 100%;
    gap: 6px;
  }

  .mode-button {
    flex: 1 1 auto;
    padding: 0 8px;
    font-size: 14px;
  }

  .panel--scene .fields {
    grid-template-columns: minmax(0, 1fr);
  }

  .fact {
    grid-template-columns: minmax(0, 1fr);
  }
}