/*
 * engine.css — the Sharpee browser theme engine (ADR-188).
 *
 * Owner: @sharpee/platform-browser (the published browser engine layer).
 *
 * This is the single, un-scoped consumer layer for the `--theme-*` design
 * tokens. Every visual component rule here reads tokens via var(--theme-*)
 * and carries NO `[data-theme]` selector — so it applies unconditionally.
 * A theme is therefore just a token override:
 *
 *     [data-theme="<id>"] { --theme-bg: …; --theme-text: …; … }
 *
 * shipped as an `@sharpee/theme-*` package (ADR-188). The `:root` block
 * below supplies the default token set ("classic" — white-on-blue), so the
 * engine is fully skinned with zero themes installed and degrades to the
 * default for any unset token, unknown theme id, or uninstalled persisted
 * theme (AC-7). No fallback code is required — the cascade does it.
 *
 * Provenance: the component rules are the de-scoped `modern-dark` kit from
 * the former devkit `templates/browser/styles.css`. modern-dark was the
 * token-pure source of truth (it used var(--theme-border) where dos-classic
 * had a hardcoded `#333` — that latent bug is fixed here by construction).
 * Theme-specific flourishes (retro scanlines, paper backdrop opacity, the
 * system-6 chrome) are NOT here; they live in their theme packages (ADR-188
 * Phase 3).
 *
 * Load order (ADR-188): base.css → engine.css → [theme packages] →
 * [author override]. Theme CSS MUST load after this file so equal-specificity
 * token overrides win by source order.
 */

/* ============================================================
   Default token set — "classic" (white-on-blue)
   The published --theme-* contract (16 tokens, AC-7).
   ============================================================ */

:root {
  --theme-bg: #0000aa;
  --theme-bg-alt: #000088;
  --theme-text: #ffffff;
  --theme-text-muted: #aaaaaa;
  --theme-accent: #00aaaa;
  --theme-accent-text: #000000;
  --theme-border: #00aaaa;
  --theme-input-bg: transparent;
  --theme-menu-bg: #0000aa;
  --theme-menu-hover: #000088;
  --theme-font: "Perfect DOS VGA 437", "Consolas", "Courier New", monospace;
  --theme-font-size: 16px;
  --theme-line-height: 1.4;

  /* Extended tokens. Consumed by some theme flourishes (e.g. system-6's
     distinct desktop background and chrome/body fonts). They default to the
     base values so the contract is complete and nothing is ever unset. */
  --theme-desktop-bg: var(--theme-bg);
  --theme-font-body: var(--theme-font);
  --theme-font-chrome: var(--theme-font);
}

/* ============================================================
   Body
   ============================================================ */

body {
  background: var(--theme-bg);
  color: var(--theme-text);
  font-family: var(--theme-font);
  font-size: var(--theme-font-size);
  line-height: var(--theme-line-height);
}

/* ============================================================
   Window chrome
   ============================================================ */

.sharpee-window-title-bar {
  background: var(--theme-bg-alt);
  height: 28px;
  padding: 0 8px;
  font-size: 14px;
}

.sharpee-window-title {
  font-weight: bold;
  margin-right: 16px;
  text-transform: uppercase;
}

/* ============================================================
   Menu bar
   ============================================================ */

.sharpee-menu-bar {
  background: var(--theme-bg-alt);
  border-bottom: 1px solid var(--theme-border);
  padding: 0 8px;
}

.sharpee-menu-bar-trigger {
  color: var(--theme-text);
  border-radius: 2px;
}

.sharpee-menu-bar-trigger:hover,
.sharpee-menu-bar-item--open > .sharpee-menu-bar-trigger {
  background: var(--theme-accent);
  color: var(--theme-accent-text);
}

.sharpee-menu-dropdown {
  background: var(--theme-menu-bg);
  border: 1px solid var(--theme-border);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
}

.sharpee-menu-option {
  color: var(--theme-text);
}

.sharpee-menu-option:hover {
  background: var(--theme-accent);
  color: var(--theme-accent-text);
}

.sharpee-menu-separator {
  background: var(--theme-border);
}

/* ============================================================
   Status bar
   ============================================================ */

.sharpee-status-bar {
  background: var(--theme-accent);
  color: var(--theme-accent-text);
  font-weight: bold;
}

#location-name {
  text-transform: uppercase;
}

/* ============================================================
   Prose pane
   ============================================================ */

.sharpee-prose-pane p {
  margin-bottom: 0.8em;
}

.sharpee-prose-pane p:last-child {
  margin-bottom: 0;
}

.sharpee-prose-pane .command-echo {
  color: var(--theme-text-muted);
  margin-top: 1em;
  margin-bottom: 0.5em;
}

.sharpee-prose-pane .system-message {
  color: var(--theme-accent);
}

.sharpee-prose-pane .game-status {
  text-align: center;
  font-weight: bold;
  margin: 1em 0;
  padding: 0.5em;
  border: 1px solid var(--theme-border);
}

.sharpee-prose-pane {
  scrollbar-width: thin;
  scrollbar-color: var(--theme-accent) var(--theme-bg);
}

.sharpee-prose-pane::-webkit-scrollbar {
  width: 8px;
}

.sharpee-prose-pane::-webkit-scrollbar-track {
  background: var(--theme-bg);
}

.sharpee-prose-pane::-webkit-scrollbar-thumb {
  background: var(--theme-accent);
}

/* ============================================================
   Input bar
   ============================================================ */

.sharpee-input-bar {
  background: var(--theme-bg);
  border-top: 2px solid var(--theme-border);
}

.sharpee-input-prompt {
  color: var(--theme-text);
}

.sharpee-input-field {
  background: var(--theme-input-bg);
  color: var(--theme-text);
  caret-color: var(--theme-text);
}

.sharpee-input-field::placeholder {
  color: var(--theme-text-muted);
  opacity: 0.5;
}

/* ============================================================
   Dialogs
   ============================================================ */

.sharpee-dialog {
  background: var(--theme-bg);
  color: var(--theme-text);
  border: 2px solid var(--theme-border);
  font-family: var(--theme-font);
  font-size: var(--theme-font-size);
  line-height: var(--theme-line-height);
}

.sharpee-dialog::backdrop {
  background: rgba(0, 0, 0, 0.7);
}

.sharpee-dialog-title {
  background: var(--theme-accent);
  color: var(--theme-accent-text);
}

.sharpee-dialog-buttons {
  border-top: 1px solid var(--theme-border);
}

.sharpee-dialog-button {
  background: var(--theme-bg-alt);
  border: 1px solid var(--theme-border);
  color: var(--theme-text);
  font-family: inherit;
  font-size: inherit;
}

.sharpee-dialog-button:hover {
  background: var(--theme-accent);
  color: var(--theme-accent-text);
  border-color: var(--theme-accent);
}

.sharpee-dialog-button:focus {
  outline: 1px solid var(--theme-accent);
  outline-offset: 2px;
}

.sharpee-dialog-button:disabled {
  color: var(--theme-text-muted);
}

/* ============================================================
   Dialog body internals (save/restore UX, not part of the contract)
   ============================================================ */

.save-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.save-input-row label {
  white-space: nowrap;
}

#save-name-input {
  background: var(--theme-bg-alt);
  border: 1px solid var(--theme-border);
  color: var(--theme-text);
  padding: 4px 6px;
}

#save-name-input:focus {
  border-color: var(--theme-accent);
}

.saves-list-label {
  color: var(--theme-text-muted);
  margin-bottom: 8px;
  font-size: 0.9em;
}

.saves-list {
  background: var(--theme-bg-alt);
  border: 1px solid var(--theme-border);
  max-height: 200px;
  overflow-y: auto;
}

.save-slot {
  padding: 6px 8px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--theme-border);
}

.save-slot:last-child {
  border-bottom: none;
}

.save-slot:hover {
  background: var(--theme-menu-hover);
}

.save-slot.selected {
  background: var(--theme-accent);
  color: var(--theme-accent-text);
}

.save-slot-name {
  font-weight: bold;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.save-slot-info {
  color: var(--theme-text-muted);
  font-size: 0.85em;
  white-space: nowrap;
}

.save-slot.selected .save-slot-info {
  color: var(--theme-accent-text);
}

.no-saves-message {
  color: var(--theme-text-muted);
  font-style: italic;
  padding: 12px;
  text-align: center;
}

.startup-info {
  color: var(--theme-accent);
  margin: 0 0 12px 0;
  line-height: 1.4;
}

.startup-question {
  color: var(--theme-text);
  margin: 0;
}

.saves-list::-webkit-scrollbar,
.sharpee-dialog-body::-webkit-scrollbar {
  width: 8px;
}

.saves-list::-webkit-scrollbar-track,
.sharpee-dialog-body::-webkit-scrollbar-track {
  background: var(--theme-bg-alt);
}

.saves-list::-webkit-scrollbar-thumb,
.sharpee-dialog-body::-webkit-scrollbar-thumb {
  background: var(--theme-accent);
}

/* ============================================================
   Mobile
   ============================================================ */

@media (max-width: 600px) {
  body {
    font-size: 14px;
  }
  .sharpee-status-bar {
    font-size: 12px;
  }
  .sharpee-input-prompt {
    font-size: 16px;
  }
  .sharpee-dialog {
    min-width: 280px;
    margin: 12px;
  }
  .save-input-row {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .sharpee-dialog-buttons {
    gap: 12px;
  }
  .sharpee-dialog-button {
    flex: 1;
    padding: 10px 16px;
  }
}

@media (max-width: 380px) {
  body {
    font-size: 13px;
  }
  .sharpee-status-bar {
    font-size: 11px;
    flex-wrap: wrap;
    gap: 4px;
  }
  #location-name {
    flex: 1 1 100%;
    text-align: center;
  }
  #score-turns {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (max-height: 500px) and (orientation: landscape) {
  body {
    font-size: 13px;
    line-height: 1.3;
  }
  .sharpee-prose-pane p {
    margin-bottom: 0.5em;
  }
}