/* Playground-specific styles. Loaded only by playground.html; shared design tokens
   (colours, --mono, panels, buttons) come from styles.css. */

/* `display: flex/grid` below would otherwise beat the hidden attribute's
   `display: none`, leaving hidden sections on screen. */
[hidden] {
  display: none !important;
}

.page-intro {
  padding: 3.2rem 0 1.6rem;
  max-width: 62ch;
}

.page-intro h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.021em;
}

.page-intro .lede {
  margin-top: 1rem;
}

.panel-title {
  margin: 0 0 0.7rem;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.012em;
}

.panel-copy {
  margin: 0 0 1.1rem;
  color: var(--muted);
  line-height: 1.75;
  max-width: 62ch;
}

/* --- tutorial card -------------------------------------------------------- */

.tutorial {
  border: 1px solid rgba(124, 224, 195, 0.28);
  border-radius: 1.1rem;
  background: linear-gradient(180deg, rgba(12, 34, 50, 0.9), rgba(8, 24, 37, 0.9));
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 1.2rem;
}

.tutorial-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1.3rem;
  border-bottom: 1px solid var(--line);
  background: rgba(4, 15, 25, 0.4);
}

.progress {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.dot {
  width: 1.6rem;
  height: 0.25rem;
  border-radius: 999px;
  background: rgba(167, 192, 197, 0.22);
  transition: background 200ms ease;
}

.dot.is-done {
  background: rgba(124, 224, 195, 0.55);
}

.dot.is-current {
  background: var(--sea);
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 0.84rem;
  color: var(--muted);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link-btn:hover {
  color: var(--text);
}

.tutorial-body {
  padding: 1.5rem 1.3rem 1.3rem;
}

.step-count {
  margin: 0 0 0.4rem;
  color: var(--sea);
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tutorial-body h2 {
  margin: 0 0 0.8rem;
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.018em;
}

.step-prose p,
.step-result p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  line-height: 1.78;
  max-width: 68ch;
}

.step-prose p:last-child,
.step-result p:last-child {
  margin-bottom: 0;
}

.step-prose strong,
.step-result strong {
  color: var(--text);
  font-weight: 600;
}

.step-result {
  margin-top: 1rem;
  padding: 0.9rem 1.1rem;
  border-radius: 0.7rem;
  border: 1px solid rgba(124, 224, 195, 0.3);
  background: rgba(124, 224, 195, 0.06);
}

.tutorial-actions {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-top: 1.3rem;
  flex-wrap: wrap;
}

/* --- buttons -------------------------------------------------------------- */

.btn {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: 0.55rem;
  border: 1px solid var(--line);
  background: rgba(124, 224, 195, 0.07);
  color: var(--text);
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease;
}

.btn:hover,
.btn:focus-visible {
  background: rgba(124, 224, 195, 0.14);
  border-color: rgba(124, 224, 195, 0.4);
}

.btn-quiet {
  background: transparent;
  color: var(--muted);
}

.btn-quiet:hover {
  color: var(--text);
}

.btn-accent {
  background: linear-gradient(135deg, var(--sea) 0%, #a9f0d8 100%);
  border-color: transparent;
  color: #04211a;
  font-weight: 600;
}

.btn-accent:hover,
.btn-accent:focus-visible {
  background: linear-gradient(135deg, #93e9cd 0%, #bcf7e3 100%);
  border-color: transparent;
}

.btn-lg {
  font-size: 0.95rem;
  padding: 0.7rem 1.3rem;
  border-radius: 0.65rem;
}

.btn-sm {
  font-family: var(--mono);
  font-size: 0.76rem;
  padding: 0.32rem 0.6rem;
}

/* --- verdict banner ------------------------------------------------------- */

.verdict {
  margin: 0 0 1rem;
  padding: 0.7rem 0.95rem;
  border-radius: 0.7rem;
  border: 1px solid var(--line);
  font-size: 0.88rem;
  font-weight: 500;
}

.verdict-error {
  border-color: rgba(255, 141, 124, 0.4);
  background: rgba(255, 141, 124, 0.08);
  color: var(--danger);
}

/* --- device stage --------------------------------------------------------- */

.stage {
  margin-bottom: 2.4rem;
}

.device-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 0.5rem;
  align-items: stretch;
}

.device {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(6, 19, 31, 0.55);
  padding: 1rem;
  transition: border-color 200ms ease, opacity 200ms ease;
}

.device[data-offline="true"] {
  border-color: rgba(255, 188, 120, 0.3);
  background: rgba(24, 18, 10, 0.35);
}

.device-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.device-icon {
  color: var(--sea);
  font-size: 1rem;
}

.device-head h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  flex: 1;
}

.device-state {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--sea);
  border: 1px solid rgba(124, 224, 195, 0.3);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
}

.device-state.is-offline {
  color: var(--sun);
  border-color: rgba(255, 188, 120, 0.35);
}

.device-summary {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

/* connection indicator between the two devices */
.link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0 0.4rem;
  min-width: 7rem;
}

.link-line {
  flex: 1;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line), transparent);
}

.link-badge {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-align: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  white-space: nowrap;
}

.link-badge.is-match {
  color: var(--sea);
  border-color: rgba(124, 224, 195, 0.4);
  background: rgba(124, 224, 195, 0.08);
}

.link-badge.is-diff {
  color: var(--sun);
  border-color: rgba(255, 188, 120, 0.4);
  background: rgba(255, 188, 120, 0.07);
}

.link-badge.is-off {
  color: var(--danger);
  border-color: rgba(255, 141, 124, 0.35);
  border-style: dashed;
}

/* --- tree ----------------------------------------------------------------- */

.tree {
  min-height: 6rem;
  max-height: 13rem;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  padding: 0.6rem;
  background: rgba(4, 15, 25, 0.55);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.tree-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.14rem 0.2rem;
}

.tree-dir {
  color: var(--sea);
}

.tree-file {
  color: var(--text);
}

.tree-tag {
  color: var(--sun);
  border: 1px solid rgba(255, 188, 120, 0.35);
  border-radius: 0.3rem;
  padding: 0 0.35rem;
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  flex: none;
}

.tree-empty {
  color: rgba(167, 192, 197, 0.55);
  font-style: italic;
  padding: 0.2rem;
}

/* --- fingerprints --------------------------------------------------------- */

.fingerprints {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.7rem;
}

.fp {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  align-items: center;
  padding: 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: rgba(4, 15, 25, 0.4);
}

.fp-label {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.fp code {
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.fp code.is-match {
  color: var(--sea);
}

.fp code.is-diff {
  color: var(--sun);
}

.fp-verdict {
  min-width: 7rem;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.fp-verdict.is-match {
  color: var(--sea);
  border-color: rgba(124, 224, 195, 0.4);
  background: rgba(124, 224, 195, 0.08);
}

.fp-verdict.is-diff {
  color: var(--sun);
  border-color: rgba(255, 188, 120, 0.4);
  background: rgba(255, 188, 120, 0.07);
}

.fp-note {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
  text-align: center;
}

/* --- free play ------------------------------------------------------------ */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  align-items: center;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: rgba(6, 19, 31, 0.5);
  margin-bottom: 1rem;
}

.toolbar-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.toolbar-end {
  margin-left: auto;
}

.toolbar-label {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-right: 0.2rem;
}

.composer-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.composer {
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: rgba(6, 19, 31, 0.45);
  padding: 1rem;
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.composer h4 {
  margin: 0 0 0.2rem;
  font-size: 0.92rem;
  font-weight: 600;
}

.field {
  display: grid;
  gap: 0.25rem;
}

.field label {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.45rem 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid var(--line);
  background: rgba(4, 15, 25, 0.6);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.8rem;
  resize: vertical;
}

.field input:focus-visible,
.field textarea:focus-visible {
  outline: 2px solid var(--sea-deep);
  outline-offset: 1px;
}

.composer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.2rem;
}

/* --- technical details ---------------------------------------------------- */

.detail-toggle {
  margin-top: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: rgba(6, 19, 31, 0.4);
  padding: 0.8rem 1rem;
}

.detail-toggle summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.86rem;
}

.detail-toggle summary:hover {
  color: var(--text);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.detail-card {
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  padding: 0.85rem;
  background: rgba(4, 15, 25, 0.45);
}

.detail-card h4 {
  margin: 0 0 0.6rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.detail-card dl {
  margin: 0;
  display: grid;
  gap: 0.3rem;
}

.detail-card dl > div {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.28rem;
}

.detail-card dl > div:last-child {
  border-bottom: none;
}

.detail-card dt {
  color: var(--muted);
  font-size: 0.76rem;
}

.detail-card dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-align: right;
}

/* --- activity log --------------------------------------------------------- */

.activity {
  margin-top: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: rgba(6, 19, 31, 0.45);
  padding: 1rem;
}

.activity-title {
  margin: 0 0 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.log {
  max-height: 12rem;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.76rem;
  display: grid;
  gap: 0.1rem;
}

.log-line {
  display: flex;
  gap: 0.7rem;
  padding: 0.22rem 0.4rem;
  border-radius: 0.35rem;
  color: var(--muted);
  line-height: 1.5;
}

.log-time {
  color: rgba(167, 192, 197, 0.45);
  flex: none;
}

.log-empty {
  color: rgba(167, 192, 197, 0.45);
  font-style: italic;
  padding: 0.22rem 0.4rem;
}

.log-ok {
  color: var(--sea);
}

.log-sync {
  color: var(--text);
  background: rgba(124, 224, 195, 0.07);
}

.log-warn {
  color: var(--sun);
}

.log-error {
  color: var(--danger);
  background: rgba(255, 141, 124, 0.07);
}

/* --- responsive ----------------------------------------------------------- */

@media (max-width: 780px) {
  .device-row,
  .fingerprints {
    grid-template-columns: 1fr;
  }

  .link {
    flex-direction: row;
    min-width: 0;
    padding: 0.3rem 0;
  }

  .link-line {
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--line), transparent);
  }

  .fp-verdict {
    justify-self: center;
  }

  .toolbar-end {
    margin-left: 0;
  }
}