/* ============================================================
   FIREADER — Application Styles (app.css)
   ============================================================ */

/* ── App Layout ───────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  padding-top: var(--sai-top);
  padding-bottom: var(--sai-bottom);
}

/* ── Header / Tabs ────────────────────────────────────────── */
header {
  height: var(--header-h);
  background: var(--bg-default);
  display: flex;
  align-items: flex-end;
  border-bottom: 1px solid var(--border);
  padding-left: 16px;
  gap: 8px;
  flex-shrink: 0;
}

.tab {
  height: var(--tab-h);
  background: var(--bg-canvas);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 0;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 13px;
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 0;
  max-width: fit-content;
}

.tab.active {
  color: var(--text-primary);
  border-bottom: 1px solid var(--bg-canvas);
  margin-bottom: -1px;
}

.tab-icon {
  color: var(--accent);
  font-size: 10px;
  flex-shrink: 0;
}

#tab-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  height: var(--tab-h);
  color: var(--text-muted);
  flex-shrink: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.header-actions::-webkit-scrollbar {
  display: none;
}

.btn-icon {
  color: inherit;
  transition: color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  flex-shrink: 0;
}
.btn-icon:hover { color: var(--text-primary); }

/* ── Main Workspace ───────────────────────────────────────── */
main {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
  background: var(--bg-canvas);
}

/* ── Line Numbers ─────────────────────────────────────────── */
#gutter {
  width: var(--gutter-w);
  flex-shrink: 0;
  border-right: 1px solid var(--border-light);
  background: var(--bg-default);
  padding: 16px 0;
  overflow: hidden;
  text-align: right;
  color: var(--text-line-num);
  font-size: 13px;
  line-height: 1.6;
  user-select: none;
}
.line-num {
  padding-right: 12px;
  height: calc(13px * 1.6);
}

/* ── Editor Area ──────────────────────────────────────────── */
#editor-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px;
  position: relative;
}

#editor-content {
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  max-width: 800px;
  margin: 0 auto;
  user-select: text;
  -webkit-user-select: text;
}

/* Syntax Classes */
.syn-tag { color: var(--syn-tag); }
.syn-str { color: var(--syn-str); }
.syn-num { color: var(--syn-num); }
.syn-name { color: var(--syn-name); }
.syn-kw { color: var(--syn-kw); }
.syn-comment { color: var(--syn-comment); font-style: italic; }
.syn-muted { color: var(--syn-muted); }

/* ── Status Bar ───────────────────────────────────────────── */
footer {
  height: var(--status-h);
  background: var(--accent);
  color: var(--bg-canvas);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-size: 11px;
  font-weight: 500;
  flex-shrink: 0;
  z-index: 10;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}
.status-btn:hover { opacity: 0.8; }

/* ── Splash / Empty State ─────────────────────────────────── */
#splash {
  position: absolute;
  inset: 0;
  background: var(--bg-canvas);
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  transition: opacity var(--dur-mid) var(--ease-out);
}

#splash.hidden {
  opacity: 0;
  pointer-events: none;
}

.logo-ascii {
  color: var(--accent);
  font-weight: 700;
  font-size: clamp(5px, 1.4vw, 16px);
  line-height: 1.1;
  margin-bottom: 24px;
  text-shadow: 0 0 10px var(--accent-glow);
  white-space: pre;
}

.splash-menu {
  width: 100%;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 2; /* Keep menu above books */
}

.ascii-books-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 16px;
  pointer-events: none;
  color: var(--border);
  opacity: 1; /* Match the border color directly */
  box-sizing: border-box;
  z-index: 1;
}

.ascii-book {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.8vw, 16px);
  font-weight: 600;
  line-height: 1.1;
  white-space: pre;
  margin: 0;
}

@media (max-width: 800px) {
  .ascii-books-container {
    justify-content: center;
  }
  .ascii-book.right {
    display: none;
  }
}

.cmd-btn {
  background: var(--bg-default);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 12px 16px;
  border-radius: 0;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all var(--dur-fast) var(--ease-out);
  font-size: 14px;
}

.cmd-btn:hover, .cmd-btn:active {
  background: var(--bg-hover);
  border-color: var(--text-muted);
}

.cmd-btn .key {
  color: var(--accent);
  font-weight: 700;
}

.cmd-desc {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.domain-selector {
  display: flex;
  gap: 12px;
  padding: 4px;
  font-size: 11px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.domain-selector label {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color var(--dur-fast);
}

.domain-selector label:hover {
  color: var(--text-primary);
}

.domain-selector input[type="radio"] {
  accent-color: var(--accent);
}

/* ── Loaders ──────────────────────────────────────────────── */
.loader-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 30;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

#pixel-loader-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.loader-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--text-muted);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 12px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Modals / Command Palette ─────────────────────────────── */
.modal-wrapper {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 40;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 60px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast);
}

.modal-wrapper.active {
  opacity: 1;
  pointer-events: auto;
}

.cmd-palette {
  background: var(--bg-default);
  border: 1px solid var(--border);
  border-radius: 0;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  overflow: hidden;
  transform: translateY(-10px);
  transition: transform var(--dur-fast);
}
.modal-wrapper.active .cmd-palette {
  transform: translateY(0);
}

.cmd-input {
  width: 100%;
  padding: 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--text-primary);
}

.cmd-results {
  max-height: 300px;
  overflow-y: auto;
}

.cmd-item {
  padding: 12px 16px;
  cursor: pointer;
  border-left: 2px solid transparent;
}
.cmd-item:hover, .cmd-item.selected {
  background: var(--bg-hover);
  border-left-color: var(--accent);
}
.cmd-title { font-weight: 500; color: var(--text-primary); margin-bottom: 4px; }
.cmd-desc { font-size: 11px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Hide file input */
#file-input, #folder-input { display: none; }

.modal-wrapper.active {
  display: flex;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
  padding: 16px;
  max-height: 60vh;
  overflow-y: auto;
}

.topic-tag[data-val="any"] {
  grid-column: 1 / -1;
}

.topic-tag {
  background: transparent;
  text-align: left;
  font-family: inherit;
  padding: 8px;
  border: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--dur-fast);
}

@media (hover: hover) {
  .topic-tag:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--bg-hover);
  }
}

.topic-tag.active {
  border-color: var(--accent);
  color: var(--bg-default);
  background: var(--accent);
}

/* ── Annotations ──────────────────────────────────────────── */
.inline-annotation {
  color: var(--accent);
  font-style: italic;
  font-size: 13px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
  margin-top: 4px;
  margin-bottom: 4px;
  background: var(--bg-hover);
  padding: 4px 16px;
  word-break: break-word;
}

.line-num {
  cursor: pointer;
  transition: color var(--dur-fast);
}
.line-num:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

/* ── Utilities ────────────────────────────────────────────── */
.d-none { display: none !important; }

/* ── Shortcut Legend ───────────────────────────────────────── */
.shortcut-legend {
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
  font-family: var(--font-mono);
  opacity: 0.7;
  padding: 4px 16px;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-default);
  text-align: right;
  flex-shrink: 0;
}
@media (max-width: 600px) {
  .shortcut-legend {
    display: none;
  }
}

/* ── Toast Notifications ──────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: calc(var(--status-h) + 16px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
  pointer-events: none;
}
.toast {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 13px;
  font-family: var(--font-mono);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  animation: toast-in 0.2s ease-out forwards;
}
.toast.error {
  border-color: #ff5555;
  color: #ff5555;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-10px); }
}

/* ── Mobile Bottom Action Bar ─────────────────────────────── */
.mobile-actions {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 1px;
  padding: 0;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--bg-canvas);
  border-top: 1px solid var(--border);
  z-index: 50;
  height: 32px;
}

.mob-btn {
  flex: 0 0 auto;
  padding: 6px 14px;
  background: transparent;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  cursor: pointer;
  transition: all var(--dur-fast);
  text-align: center;
  height: 100%;
}

.mob-btn:last-child {
  border-right: none;
}

.mob-btn:active {
  background: var(--bg-hover);
  color: var(--accent);
}

#mob-next {
  color: var(--accent);
  font-weight: 600;
}

.mob-progress {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  overflow: hidden;
  gap: 6px;
}

.mob-progress-bar {
  letter-spacing: -1px;
  white-space: nowrap;
  overflow: hidden;
}

/* Desktop: always hide */
@media (min-width: 601px) {
  .mobile-actions { display: none !important; }
}

/* Mobile: make room for the fixed action bar */
@media (max-width: 600px) {
  .app-wrapper {
    padding-bottom: calc(32px + env(safe-area-inset-bottom, 0px));
  }
}

/* ── Wiki Links ────────────────────────────────────────── */
.wiki-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed var(--accent);
  cursor: pointer;
  transition: all 0.2s ease;
}

.wiki-link:hover {
  background-color: var(--bg-hover);
  color: #fff;
  border-bottom-style: solid;
}