/* DOS Player — amber-on-black DOSBox vibe with modern readable chrome.
   Layout works full-bleed (player) or as a centered card (launcher). */

:root {
  --dos-bg: #0a0805;
  --dos-bg-panel: #15110a;
  --dos-bg-elev: #1c170d;
  --dos-border: #3a2d14;
  --dos-border-hot: #6b5021;
  --dos-amber: #f59e0b;
  --dos-amber-soft: #fbbf24;
  --dos-amber-dim: #b45309;
  --dos-text: #f3e9d0;
  --dos-text-dim: #b8a878;
  --dos-text-muted: #7c6c45;
  --dos-danger: #f87171;
  --dos-success: #84cc16;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Consolas', 'Liberation Mono', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--dos-bg);
  color: var(--dos-text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
  /* Subtle horizontal scanline texture — gives the page CRT character
     without hurting text readability. Keeps OG screenshot interesting. */
  background-image: repeating-linear-gradient(
    180deg,
    rgba(245, 158, 11, 0.025) 0px,
    rgba(245, 158, 11, 0.025) 1px,
    transparent 1px,
    transparent 3px
  );
}

a {
  color: var(--dos-amber);
}
a:hover {
  color: var(--dos-amber-soft);
}

code {
  font-family: var(--font-mono);
  background: var(--dos-bg-elev);
  border: 1px solid var(--dos-border);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--dos-amber-soft);
  font-size: 0.9em;
}

#app {
  max-width: 760px;
  margin: 0 auto;
  /* 64px top clears the back-button (44px tall + 20px top + gap). */
  padding: 64px 20px 40px;
}

#app.is-playing {
  max-width: none;
  padding: 0;
}

.app-header {
  text-align: center;
  margin-bottom: 28px;
}

.app-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--dos-amber);
  text-shadow: 0 0 14px rgba(245, 158, 11, 0.35);
}

.app-icon {
  font-family: var(--font-sans);
  display: inline-block;
  margin-right: 6px;
  transform: translateY(-2px);
}

.app-tagline {
  margin: 0;
  color: var(--dos-text-dim);
  font-size: 14px;
}

.section-title {
  margin: 28px 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dos-amber-dim);
}

.section-title:first-of-type {
  margin-top: 8px;
}

/* ----- Catalog grid ----- */

.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--dos-bg-panel);
  border: 1px solid var(--card-border, var(--dos-border));
  border-radius: 6px;
  padding: 18px 18px 16px;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  transition: border-color 140ms, transform 140ms, box-shadow 140ms;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at top right,
    var(--card-glow, transparent) 0%,
    transparent 60%
  );
  pointer-events: none;
  opacity: 0.5;
  transition: opacity 140ms;
}

.card:hover,
.card:focus-visible {
  outline: none;
  border-color: var(--card-border-hot, var(--dos-border-hot));
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.card:hover::before,
.card:focus-visible::before {
  opacity: 1;
}

.card[data-state='loading'] {
  cursor: progress;
  pointer-events: none;
  opacity: 0.85;
}

.card-icon {
  font-size: 32px;
  line-height: 1;
  margin-bottom: 12px;
  filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.25));
}

.card-name {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--dos-text);
  letter-spacing: 0.01em;
}

.card-meta {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dos-text-muted);
}

.card-blurb {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--dos-text-dim);
  flex: 1;
}

.card-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: auto;
}

.card-action {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dos-amber);
}

.card-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dos-text-muted);
  padding: 3px 7px;
  border: 1px solid var(--dos-border);
  border-radius: 3px;
}

.card-badge[data-state='cached'] {
  color: var(--dos-success);
  border-color: rgba(132, 204, 22, 0.4);
}

.card-progress {
  width: 100%;
  height: 3px;
  background: var(--dos-bg);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 8px;
}

.card-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--dos-amber);
  transition: width 200ms ease-out;
}

/* Indeterminate state — used when the download is routed through a CORS
   proxy and we can't compute real percentages. A 40% strip slides across
   the bar so the user can see *something* is happening. */
.card-progress.is-indeterminate {
  position: relative;
  overflow: hidden;
}

.card-progress.is-indeterminate span {
  width: 40%;
  transform: translateX(-100%);
  animation: card-progress-indeterminate 1.4s ease-in-out infinite;
  transition: none;
}

@keyframes card-progress-indeterminate {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(250%);
  }
}

.card[data-accent='amber'] {
  --card-border: rgba(245, 158, 11, 0.25);
  --card-border-hot: rgba(245, 158, 11, 0.6);
  --card-glow: rgba(245, 158, 11, 0.08);
}

.card[data-accent='rust'] {
  --card-border: rgba(194, 65, 12, 0.3);
  --card-border-hot: rgba(234, 88, 12, 0.65);
  --card-glow: rgba(194, 65, 12, 0.1);
}

.card[data-accent='slate'] {
  --card-border: rgba(100, 116, 139, 0.3);
  --card-border-hot: rgba(148, 163, 184, 0.6);
  --card-glow: rgba(100, 116, 139, 0.1);
}

.card[data-accent='olive'] {
  --card-border: rgba(132, 204, 22, 0.25);
  --card-border-hot: rgba(132, 204, 22, 0.55);
  --card-glow: rgba(132, 204, 22, 0.08);
}

.card[data-accent='plum'] {
  --card-border: rgba(168, 85, 247, 0.25);
  --card-border-hot: rgba(168, 85, 247, 0.55);
  --card-glow: rgba(168, 85, 247, 0.1);
}

.card[data-accent='teal'] {
  --card-border: rgba(20, 184, 166, 0.3);
  --card-border-hot: rgba(45, 212, 191, 0.6);
  --card-glow: rgba(20, 184, 166, 0.1);
}

.card[data-accent='crimson'] {
  --card-border: rgba(220, 38, 38, 0.3);
  --card-border-hot: rgba(248, 113, 113, 0.6);
  --card-glow: rgba(220, 38, 38, 0.1);
}

.library-section {
  margin-top: 8px;
}

/* ----- Advanced disclosure ----- */

.advanced {
  margin-top: 28px;
  background: var(--dos-bg-panel);
  border: 1px solid var(--dos-border);
  border-radius: 6px;
  overflow: hidden;
}

.advanced > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  user-select: none;
}

.advanced > summary::-webkit-details-marker {
  display: none;
}

.advanced > summary::before {
  content: '▸';
  color: var(--dos-amber-dim);
  font-size: 11px;
  transition: transform 140ms;
  margin-right: 2px;
}

.advanced[open] > summary::before {
  transform: rotate(90deg);
}

.advanced-summary-text {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--dos-text);
}

.advanced-summary-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--dos-text-muted);
}

.advanced-body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--dos-border);
}

.advanced-tabs {
  display: flex;
  gap: 0;
  margin: 8px 0 14px;
  border-bottom: 1px solid var(--dos-border);
}

.tab {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--dos-text-muted);
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 120ms, border-color 120ms;
}

.tab:hover {
  color: var(--dos-text-dim);
}

.tab.is-active {
  color: var(--dos-amber);
  border-bottom-color: var(--dos-amber);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.field {
  display: block;
  margin-bottom: 10px;
}

.field-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dos-text-dim);
}

.field input[type='url'],
.field input[type='text'] {
  width: 100%;
  padding: 10px 12px;
  background: var(--dos-bg);
  border: 1px solid var(--dos-border);
  border-radius: 4px;
  color: var(--dos-text);
  font-family: var(--font-mono);
  font-size: 13px;
  transition: border-color 120ms;
}

.field input[type='url']:focus,
.field input[type='text']:focus {
  outline: none;
  border-color: var(--dos-amber);
  box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

.field-hint {
  margin: 8px 0 16px;
  color: var(--dos-text-muted);
  font-size: 12px;
  line-height: 1.5;
}

.row {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

button.primary,
button.ghost {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 10px 18px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 120ms, color 120ms, border-color 120ms;
  min-height: 40px;
}

button.primary {
  background: var(--dos-amber);
  color: #1a1206;
  border: 1px solid var(--dos-amber-soft);
  text-transform: uppercase;
}

button.primary:hover {
  background: var(--dos-amber-soft);
}

button.primary:disabled {
  background: var(--dos-border);
  color: var(--dos-text-muted);
  border-color: var(--dos-border);
  cursor: not-allowed;
}

button.ghost {
  background: transparent;
  color: var(--dos-text-dim);
  border: 1px solid var(--dos-border);
}

button.ghost:hover {
  color: var(--dos-amber);
  border-color: var(--dos-border-hot);
}

.dropzone {
  position: relative;
  border: 2px dashed var(--dos-border);
  border-radius: 6px;
  padding: 36px 20px;
  text-align: center;
  background: var(--dos-bg);
  cursor: pointer;
  transition: border-color 120ms, background 120ms;
}

.dropzone:hover,
.dropzone:focus,
.dropzone.is-dragging {
  outline: none;
  border-color: var(--dos-amber);
  background: rgba(245, 158, 11, 0.04);
}

.dropzone-inner strong {
  display: block;
  color: var(--dos-text);
  font-family: var(--font-mono);
  font-size: 14px;
  margin-bottom: 4px;
}

.dropzone-inner span {
  color: var(--dos-text-muted);
  font-size: 13px;
}

.library {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.library-empty {
  color: var(--dos-text-muted);
  font-size: 13px;
  text-align: center;
  padding: 20px 0;
  margin: 0;
}

.library-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--dos-bg);
  border: 1px solid var(--dos-border);
  border-radius: 4px;
  transition: border-color 120ms;
}

.library-row:hover {
  border-color: var(--dos-border-hot);
}

.library-name {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--dos-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.library-size {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dos-text-muted);
}

.library-actions {
  display: flex;
  gap: 6px;
}

.library-actions button {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--dos-border);
  border-radius: 3px;
  color: var(--dos-text-dim);
  cursor: pointer;
}

.library-actions button:hover {
  color: var(--dos-amber);
  border-color: var(--dos-border-hot);
}

.library-actions button.danger:hover {
  color: var(--dos-danger);
  border-color: var(--dos-danger);
}

.status {
  margin-top: 14px;
  min-height: 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--dos-text-dim);
  text-align: center;
}

.status[data-tone='error'] {
  color: var(--dos-danger);
}

.status[data-tone='success'] {
  color: var(--dos-success);
}

.status .progress {
  display: inline-block;
  min-width: 4ch;
  color: var(--dos-amber);
}

.info {
  margin-top: 24px;
  background: var(--dos-bg-panel);
  border: 1px solid var(--dos-border);
  border-radius: 6px;
  padding: 12px 16px;
}

.info summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--dos-amber-dim);
  list-style: none;
}

.info summary::-webkit-details-marker {
  display: none;
}

.info summary::before {
  content: '▸';
  display: inline-block;
  margin-right: 8px;
  transition: transform 120ms;
}

.info[open] summary::before {
  transform: rotate(90deg);
}

.info ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--dos-text-dim);
  font-size: 13px;
}

.info li {
  margin-bottom: 6px;
}

/* ----- Player view ----- */

.player {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.player-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--dos-bg-panel);
  border-bottom: 1px solid var(--dos-border);
  flex-shrink: 0;
}

.player-title {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--dos-text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

.dos-host {
  flex: 1;
  min-height: 0;
  background: #000;
  position: relative;
}

/* js-dos v8 mounts its UI as a flex root — ensure it fills the host. */
.dos-host > .jsdos-rso {
  width: 100% !important;
  height: 100% !important;
}

/* Click-to-start overlay. WebAudio's AudioContext starts in a
   suspended state and only unlocks when a real user gesture handler
   calls resume(). With js-dos's sidebar hidden by `kiosk: true`, the
   page has no inviting click target, so we lay our own button across
   the emulator. Tapping it counts as the gesture, removes itself,
   and focuses the canvas. */
.jsdos-click-to-start {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: rgba(0, 0, 0, 0.62);
  color: #fff;
  font: inherit;
  cursor: pointer;
  /* Soft fade-in keeps it from punching in jarringly before the canvas. */
  animation: jsdos-click-to-start-fade-in 180ms ease-out;
}

.jsdos-click-to-start:hover,
.jsdos-click-to-start:focus-visible {
  background: rgba(0, 0, 0, 0.74);
  outline: none;
}

.jsdos-click-to-start-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 24px 32px;
  border-radius: 10px;
  background: rgba(124, 92, 255, 0.18);
  border: 1px solid rgba(124, 92, 255, 0.45);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.jsdos-click-to-start-icon {
  font-size: 2.8rem;
  line-height: 1;
}

.jsdos-click-to-start-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.jsdos-click-to-start-sub {
  font-size: 0.85rem;
  font-weight: 400;
  opacity: 0.78;
  letter-spacing: 0;
}

@keyframes jsdos-click-to-start-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ----- Mobile ----- */

@media (max-width: 640px) {
  #app {
    padding: 56px 14px 24px;
  }

  .app-title {
    font-size: 26px;
  }

  .loader-card {
    padding: 16px;
  }

  .tab {
    font-size: 11px;
    padding: 10px 6px;
    letter-spacing: 0.04em;
  }

  .player-toolbar {
    padding: 8px 10px;
  }

  .player-title {
    font-size: 11px;
  }
}