/* PowerPoint Anatomy - styles */

:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --panel: #111827;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #f472b6;
  --accent-3: #fbbf24;
  --success: #4ade80;
  --danger: #f87171;
  --border: #334155;
  --code-bg: #020617;
  --code-text: #e2e8f0;
  --tag: #7dd3fc;
  --attr: #a5f3fc;
  --val: #fca5a5;
  --str: #86efac;
  --comment: #64748b;
  --px-per-inch: 40;
  --slide-w: 13.33;
  --slide-h: 7.5;
  --touch-min: 44px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

button, input, select {
  font: inherit;
}

button {
  cursor: pointer;
}

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

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  margin: 0;
  color: var(--muted);
}

.stepper {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.stepper li {
  flex: 1 1 auto;
  min-width: 0;
}

.stepper button {
  width: 100%;
  min-height: var(--touch-min);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stepper button:hover, .stepper button:focus-visible {
  border-color: var(--accent);
  color: var(--text);
  outline: none;
}

.stepper li.active button {
  background: var(--accent);
  color: var(--panel);
  border-color: var(--accent);
}

.stepper li.visited button {
  color: var(--text);
  border-color: var(--success);
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.stage {
  display: none;
  animation: fadeIn 0.35s ease;
}

.stage.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.stage h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  color: var(--text);
}

.stage .lead {
  color: var(--muted);
  margin: 0 0 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  color: var(--accent-3);
}

.two-col, .three-col {
  display: grid;
  gap: 1rem;
  margin: 1rem 0;
}

.two-col {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.three-col {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

@media (max-width: 640px) {
  .two-col, .three-col {
    grid-template-columns: 1fr;
  }
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin: 1rem 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: var(--touch-min);
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 0.5rem;
  font-weight: 600;
  transition: transform 0.1s, border-color 0.2s, background 0.2s;
}

.btn:hover, .btn:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn.primary {
  background: var(--accent);
  color: var(--panel);
  border-color: var(--accent);
}

.btn.accent2 {
  background: var(--accent-2);
  color: var(--panel);
  border-color: var(--accent-2);
}

.btn.success {
  background: var(--success);
  color: var(--panel);
  border-color: var(--success);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.kbd {
  display: inline-block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0.1rem 0.35rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
}

/* Slide canvas */
.slide-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.slide-canvas-wrap {
  width: min(90vw, calc(var(--slide-w) * var(--px-per-inch) * 1px));
  aspect-ratio: var(--slide-w) / var(--slide-h);
  background: #000;
  border: 2px solid var(--border);
  border-radius: 0.5rem;
  overflow: hidden;
  position: relative;
  user-select: none;
  touch-action: none;
}

.slide-canvas {
  position: absolute;
  inset: 0;
  background: white;
  transform-origin: top left;
}

.slide-element {
  position: absolute;
  box-sizing: border-box;
  cursor: grab;
  touch-action: none;
}

.slide-element:active, .slide-element.dragging {
  cursor: grabbing;
}

.slide-element.selected {
  outline: 2px dashed var(--accent);
}

.slide-textbox {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  border: 1px solid transparent;
}

.slide-textbox .txt {
  width: 100%;
  pointer-events: none;
  line-height: 1.1;
}

.slide-circle {
  border-radius: 50%;
}

.slide-picture {
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

.slide-chart {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  padding: 0.25rem;
  gap: 0.125rem;
  background: #fff;
  border: 1px solid #cbd5e1;
}

.chart-bar {
  flex: 1 1 0;
  min-width: 0;
  border-radius: 0.125rem 0.125rem 0 0;
}

/* Property listings */
.property-list, .file-content, .xml-block, .pre-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--code-text);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.property-list .section { color: var(--accent-3); font-weight: 700; }
.property-list .key { color: var(--accent); }
.property-list .val { color: var(--str); }
.property-list .comment { color: var(--comment); }
.property-list .lifted {
  color: var(--comment);
  text-decoration: line-through;
  opacity: 0.7;
}

.shared-box {
  background: rgba(56, 189, 248, 0.08);
  border: 1px dashed var(--accent);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
}

/* Syntax highlighting for XML */
.xml-block .tag { color: var(--tag); }
.xml-block .tag-name { color: var(--tag); }
.xml-block .attr { color: var(--attr); }
.xml-block .val { color: var(--val); }
.xml-block .str { color: var(--str); }
.xml-block .comment { color: var(--comment); }
.xml-block .pi { color: var(--accent-3); }

/* File tree */
.file-tree {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
  max-height: 420px;
  overflow-y: auto;
}

.file-tree ul {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.25rem;
}

.file-tree > ul { padding-left: 0; }

.file-tree li {
  position: relative;
  padding: 0.15rem 0;
}

.file-tree .folder, .file-tree .file {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.45rem;
  border-radius: 0.25rem;
  cursor: pointer;
  min-height: 44px;
}

.file-tree .folder:hover, .file-tree .file:hover,
.file-tree .folder:focus-visible, .file-tree .file:focus-visible {
  background: rgba(56,189,248,0.12);
  outline: none;
}

.file-tree .folder::before { content: "📁"; }
.file-tree .file::before { content: "📄"; }
.file-tree .image::before { content: "🖼️"; }
.file-tree .binary::before { content: "🔢"; }

.file-tree .selected > .folder,
.file-tree .selected > .file {
  background: rgba(56,189,248,0.2);
  color: var(--accent);
}

.file-tree .new {
  animation: popIn 0.3s ease;
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

/* Package reveal */
.package-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.package-icon {
  font-size: 3rem;
}

.package-name {
  font-family: ui-monospace, monospace;
  font-size: 1.2rem;
  background: var(--panel);
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
}

.package-name .ext {
  color: var(--accent);
  font-weight: 800;
}

/* XML viewer tabs */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.tab-bar button {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 0.5rem 0.75rem;
  border-bottom: 2px solid transparent;
  min-height: var(--touch-min);
}

.tab-bar button.active, .tab-bar button:hover, .tab-bar button:focus-visible {
  color: var(--text);
  border-bottom-color: var(--accent);
  outline: none;
}

/* EMU playground */
.emu-playground {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(260px, 1fr);
  gap: 1rem;
  align-items: start;
}

@media (max-width: 720px) {
  .emu-playground {
    grid-template-columns: 1fr;
  }
}

.emu-ruler {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
}

.emu-ruler .ruler-top, .emu-ruler .ruler-left {
  position: relative;
  color: var(--muted);
  font-size: 0.7rem;
  font-family: monospace;
}

.emu-ruler .ruler-top {
  height: 1rem;
  margin-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
}

.emu-ruler .ruler-left {
  width: 1.5rem;
  float: left;
  height: 100%;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: right;
  padding-right: 0.25rem;
}

.emu-ruler .canvas-area {
  overflow: hidden;
}

.emu-converter {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.emu-converter .row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.emu-converter label {
  color: var(--muted);
  min-width: 3.5rem;
}

.emu-converter input {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 0.35rem;
  padding: 0.4rem 0.6rem;
  font-family: monospace;
  min-width: 8rem;
  min-height: 44px;
}

.emu-converter .arrow {
  color: var(--accent);
  font-weight: 800;
}

/* Spec visualization */
.spec-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1rem;
  background: var(--panel);
  border-radius: 0.5rem;
  border: 1px solid var(--border);
}

.spec-ream {
  height: 12px;
  width: min(90%, 260px);
  background: linear-gradient(90deg, #e2e8f0, #f8fafc, #e2e8f0);
  border: 1px solid #94a3b8;
  border-radius: 1px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.book-shelf {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.book-set {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 60px;
}

.book-spine {
  width: 44px;
  height: 90px;
  background: linear-gradient(90deg, #1e3a8a, #3b82f6, #1e3a8a);
  border: 1px solid #60a5fa;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.55rem;
  text-align: center;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.book-set span {
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.35rem;
}

/* Navigation */
.nav-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0 0;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.nav-footer .progress {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.hidden { display: none !important; }

/* Small mobile tweaks */
@media (max-width: 420px) {
  #app { padding: 0.75rem; }
  .card { padding: 0.75rem; }
  .stepper button { font-size: 0.75rem; padding: 0.4rem; }
  .property-list, .xml-block, .pre-block, .file-tree { font-size: 0.75rem; }
}

/* Inline helpers */
.pill {
  display: inline-block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}