:root {
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --bg-page: #f5f8f8;
  --bg-surface: #ffffff;
  --bg-subtle: #eef4f3;
  --bg-dark: #152628;
  --ink-primary: #1c3135;
  --ink-secondary: #4e6569;
  --ink-muted: #7b9094;
  --teal-600: #087f72;
  --teal-700: #06685d;
  --teal-50: #eaf5f3;
  --teal-100: #d1ebe6;
  --confluence-blue: #3668a6;
  --confluence-bg: #ebf2fa;
  --amber-600: #b37d40;
  --amber-bg: #fff8ee;
  --border-color: #dce5e7;
  --border-strong: #bfd0cf;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-window: 0 24px 60px rgba(18, 42, 45, 0.11), 0 2px 10px rgba(18, 42, 45, 0.06);
  --shadow-float: 0 12px 32px rgba(18, 42, 45, 0.14);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  color: var(--ink-primary);
  background-color: var(--bg-page);
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  overflow-x: hidden;
  line-height: 1.55;
  font-size: 14px;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  letter-spacing: 0;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--teal-600);
  outline-offset: 2px;
}

code,
pre {
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: 60px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 650;
  font-size: 15px;
  color: var(--ink-primary);
  flex-shrink: 0;
}

.brand-link img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.version-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--teal-600);
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 13px;
  color: var(--ink-secondary);
}

.nav-links a:hover {
  color: var(--teal-600);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: background-color 0.16s ease, border-color 0.16s ease, transform 0.12s ease;
  white-space: nowrap;
}

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

.btn-sm {
  height: 30px;
  padding: 0 12px;
  font-size: 12px;
  flex-shrink: 0;
}

.btn-lg {
  height: 48px;
  padding: 0 22px;
  font-size: 15px;
}

.btn-primary {
  background: var(--teal-600);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(8, 127, 114, 0.22);
}

.btn-primary:hover {
  background: var(--teal-700);
}

.btn-secondary {
  background: #ffffff;
  color: var(--ink-primary);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background: var(--teal-50);
  border-color: var(--teal-600);
  color: var(--teal-700);
}

.btn-ghost {
  height: 36px;
  padding: 0 10px;
  font-size: 13px;
  color: var(--ink-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  background: var(--bg-subtle);
  color: var(--ink-primary);
}

/* Hero Section - Full-width immersive workspace background without card nesting */
.hero-band {
  position: relative;
  padding: 28px 0 32px;
  background: linear-gradient(180deg, #eef6f4 0%, var(--bg-page) 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero-top {
  max-width: 880px;
  margin: 0 auto 26px;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--teal-700);
  background: #ffffff;
  border: 1px solid var(--teal-100);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #1ca68d;
  box-shadow: 0 0 0 3px rgba(28, 166, 141, 0.2);
}

.hero-title {
  margin: 0;
  font-size: 32px;
  line-height: 1.2;
  font-weight: 650;
  letter-spacing: 0;
  color: #203d40;
}

.hero-subtitle {
  margin: 10px auto 0;
  max-width: 34em;
  font-size: 15px;
  color: var(--ink-secondary);
  line-height: 1.65;
}

.download-panel {
  margin: 22px auto 0;
  max-width: 560px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-align: left;
  overflow: hidden;
}

.download-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px;
}

.download-row + .download-row {
  border-top: 1px solid var(--border-color);
}

.download-row.is-current {
  background: #f4faf8;
}

.download-copy {
  min-width: 0;
}

.download-title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  font-weight: 650;
  line-height: 1.4;
  color: var(--ink-primary);
}

.download-copy p {
  margin: 2px 0 0;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ink-muted);
}

.dl-file {
  font-family: var(--font-mono);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.recommend-tag {
  font-size: 10px;
  font-weight: 650;
  line-height: 1.4;
  padding: 0 6px;
  border-radius: 99px;
  background: var(--teal-50);
  color: var(--teal-700);
  border: 1px solid var(--teal-100);
}

.hero-alt {
  margin: 8px 0 0;
  font-size: 12px;
}

.hero-alt a {
  color: var(--teal-700);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.hero-download-bar {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.sha-row {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.hero-meta-strip {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 12px;
  color: var(--ink-muted);
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sha-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-secondary);
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.sha-copy-btn:hover {
  border-color: var(--teal-600);
  color: var(--teal-600);
}

.sha-copy-btn span {
  display: inline-block;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: bottom;
}

/* Interactive Walkthrough Controller */
.stage-wrapper {
  margin-top: 24px;
}

.walkthrough-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.step-trigger {
  position: relative;
  text-align: left;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.step-trigger:hover {
  background: #ffffff;
  border-color: var(--border-strong);
}

.step-trigger.active {
  background: #ffffff;
  border-color: var(--teal-600);
  box-shadow: 0 4px 14px rgba(8, 127, 114, 0.08);
}

.step-trigger-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 3px;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--teal-600);
  background: var(--teal-50);
  padding: 1px 6px;
  border-radius: 3px;
}

.step-trigger.active .step-num {
  background: var(--teal-600);
  color: #ffffff;
}

.step-time {
  font-size: 11px;
  color: var(--ink-muted);
}

.step-trigger strong {
  display: block;
  font-size: 13px;
  font-weight: 650;
  color: var(--ink-primary);
  line-height: 1.35;
}

.step-trigger span.step-desc {
  display: block;
  font-size: 11px;
  color: var(--ink-muted);
  line-height: 1.4;
  margin-top: 2px;
}

.step-progress-bar {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0%;
  background: var(--teal-600);
  transition: width 0.1s linear;
}

/* Live App Stage Window (1:1 macOS PagePort simulation) */
.app-stage-window {
  position: relative;
  background: #ffffff;
  border: 1px solid #cad6d8;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-window);
  overflow: hidden;
  user-select: none;
}

/* macOS Window Chrome + PagePort Topbar */
.stage-topbar {
  height: 40px;
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px 0 14px;
  font-size: 12px;
}

.stage-topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mac-traffic {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 4px;
}

.mac-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.mac-dot.close { background: #ff5f57; }
.mac-dot.min { background: #febc2e; }
.mac-dot.max { background: #28c840; }

.win-controls {
  display: none;
  align-items: stretch;
  align-self: stretch;
  height: 40px;
  margin-left: 8px;
}

.win-btn {
  width: 46px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #203d40;
  font-size: 13px;
  line-height: 1;
}

.win-btn.win-close {
  font-size: 16px;
}

.app-stage-window[data-os="windows"] .mac-traffic {
  display: none;
}

.app-stage-window[data-os="windows"] .stage-topbar {
  padding-right: 0;
}

.app-stage-window[data-os="windows"] .win-controls {
  display: flex;
}

.stage-os-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--teal-700);
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
  border-radius: 99px;
  padding: 1px 8px;
}

.stage-brand {
  display: flex;
  align-items: center;
  gap: 7px;
  font-weight: 700;
  color: #203d40;
}

.stage-brand img {
  width: 18px;
  height: 18px;
}

.stage-divider {
  width: 1px;
  height: 14px;
  background: var(--border-color);
}

.stage-sub {
  color: var(--ink-muted);
  font-size: 12px;
}

.stage-topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 11px;
  color: var(--ink-secondary);
}

.stage-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.stage-playback-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background: #f8fbfb;
  font-size: 11px;
  color: var(--ink-secondary);
}

.stage-playback-btn:hover {
  border-color: var(--teal-600);
  color: var(--teal-600);
}

/* 3-Column Workspace inside Stage */
.stage-workspace {
  position: relative;
  display: grid;
  grid-template-columns: 215px minmax(0, 1fr) 300px;
  height: 510px;
  background: #f5f8f9;
}

/* Left Sidebar */
.stage-sidebar {
  background: #f9fbfb;
  border-right: 1px solid var(--border-color);
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.3s ease;
}

.app-stage-window[data-step="0"] .stage-sidebar {
  box-shadow: inset 0 0 0 2px rgba(8, 127, 114, 0.25);
}

.stage-side-label {
  font-size: 10px;
  font-weight: 600;
  color: #90a0a4;
  padding: 0 4px;
  display: flex;
  justify-content: space-between;
}

.stage-import-btn {
  height: 32px;
  border: 1px solid #d5e2e0;
  border-radius: 5px;
  background: #ffffff;
  display: flex;
  align-items: center;
  padding: 0 10px;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-primary);
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease;
}

.app-stage-window[data-step="0"] .stage-import-btn {
  border-color: var(--teal-600);
  background: var(--teal-50);
}

.stage-file-card {
  padding: 10px 8px;
  border-radius: 5px;
  background: #eaf3f0;
  border: 1px solid #cbe2dc;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.stage-file-info strong {
  display: block;
  font-size: 11px;
  color: #234b44;
}

.stage-file-info small {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  color: #678780;
  margin-top: 3px;
}

.stage-outline {
  margin-top: 6px;
  padding: 8px 6px;
  border-top: 1px solid #e6eded;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11px;
  color: #687f83;
}

.stage-outline-title {
  font-weight: 600;
  color: #365257;
}

.stage-outline-item {
  padding-left: 8px;
  font-size: 11px;
  color: #798e92;
  border-left: 2px solid transparent;
}

.stage-outline-item.active {
  border-left-color: var(--teal-600);
  color: var(--teal-600);
  font-weight: 600;
}

.stage-formats {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid #e6eded;
}

.stage-format-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.stage-format-badges span {
  font-family: var(--font-mono);
  font-size: 9px;
  padding: 2px 5px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: #708488;
}

/* Center Editor & Preview Area */
.stage-center {
  display: flex;
  flex-direction: column;
  padding: 10px 14px 8px;
  min-width: 0;
  position: relative;
}

.stage-doc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.stage-doc-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-primary);
}

.stage-compat-tag {
  font-size: 10px;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: 4px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--ink-muted);
}

.stage-tabs {
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
  margin-bottom: 8px;
  font-size: 11px;
  color: var(--ink-muted);
}

.stage-tab {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding-bottom: 5px;
  margin-bottom: -7px;
  border-bottom: 2px solid transparent;
}

.stage-tab.active {
  color: var(--teal-600);
  border-bottom-color: var(--teal-600);
  font-weight: 600;
}

.stage-sync-indicator {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: #228b78;
}

/* Editor Toolbar inside Stage */
.stage-toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 8px;
  background: #f9fbfb;
  border: 1px solid var(--border-color);
  border-bottom: 0;
  border-radius: 6px 6px 0 0;
  flex-wrap: wrap;
}

.tool-pill {
  height: 24px;
  padding: 0 7px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: #4f666a;
  background: transparent;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.tool-pill.highlight-tool {
  background: var(--teal-50);
  border-color: #9fd1c7;
  color: var(--teal-700);
  font-weight: 600;
}

.tool-sep {
  width: 1px;
  height: 14px;
  background: var(--border-color);
  margin: 0 2px;
}

/* Document Paper Canvas */
.stage-paper {
  flex: 1;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 0 0 6px 6px;
  padding: 16px 20px;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.paper-confluence-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 8px;
  border-bottom: 1px solid #eef2f3;
  font-size: 10px;
  color: var(--ink-muted);
}

.c-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 700;
  color: var(--confluence-blue);
  background: var(--confluence-bg);
  padding: 2px 7px;
  border-radius: 4px;
}

/* Animated TOC Macro Block */
.paper-toc-box {
  background: #f7fbfa;
  border: 1px solid #d5e8e4;
  border-left: 3px solid var(--teal-600);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 11px;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: top center;
}

.app-stage-window[data-step="0"] .paper-toc-box {
  opacity: 0.45;
  transform: scale(0.98);
}

.app-stage-window[data-step="1"] .paper-toc-box {
  box-shadow: 0 0 0 3px rgba(8, 127, 114, 0.14);
}

.paper-toc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  color: #1f4f47;
  margin-bottom: 4px;
}

.paper-toc-list {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--teal-600);
  font-size: 11px;
}

.paper-h1 {
  font-size: 17px;
  font-weight: 750;
  color: var(--ink-primary);
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Status Macro Pill */
.macro-status {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0;
  background: #dff5eb;
  color: #0e6f53;
  border: 1px solid #a8e0c7;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-stage-window[data-step="1"] .macro-status {
  transform: scale(1.06);
  box-shadow: 0 0 0 3px rgba(14, 111, 83, 0.18);
}

/* Info Panel Macro */
.macro-panel {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 11px;
  background: var(--confluence-bg);
  border: 1px solid #cde0f5;
  border-radius: 4px;
  font-size: 11px;
  color: #294e7a;
}

/* Table inside Paper */
.paper-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.paper-table th,
.paper-table td {
  border: 1px solid #dde6e8;
  padding: 6px 8px;
  text-align: left;
}

.paper-table th {
  background: #f3f7f8;
  color: #365055;
  font-weight: 600;
}

.paper-footer {
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 10px;
  color: var(--ink-muted);
  padding-top: 4px;
}

/* Right Publish Panel */
.stage-publish {
  background: #ffffff;
  border-left: 1px solid var(--border-color);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

.app-stage-window[data-step="2"] .stage-publish,
.app-stage-window[data-step="3"] .stage-publish {
  box-shadow: inset 0 0 0 2px rgba(8, 127, 114, 0.28);
}

.stage-pub-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
}

.stage-pub-icon {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--teal-50);
  color: var(--teal-600);
  display: grid;
  place-items: center;
}

.stage-stepper {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: var(--ink-muted);
  padding: 4px 0;
}

.stage-step-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 10px;
  font-weight: 700;
  background: #f0f4f4;
  color: #8fa0a3;
}

.stage-step-dot.done {
  background: var(--teal-600);
  color: #ffffff;
}

.stage-step-line {
  flex: 1;
  height: 1px;
  background: #dce5e6;
}

.stage-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stage-field label {
  font-size: 10px;
  font-weight: 600;
  color: var(--ink-secondary);
}

.stage-input-mock {
  height: 30px;
  padding: 0 9px;
  border: 1px solid #d5e0e2;
  border-radius: 4px;
  background: #fbfdfd;
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: #365055;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.stage-target-card {
  padding: 10px;
  border-radius: 6px;
  background: #f4faf8;
  border: 1px solid #bce0d6;
  font-size: 11px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  transition: all 0.3s ease;
}

.app-stage-window[data-step="0"] .stage-target-card,
.app-stage-window[data-step="1"] .stage-target-card {
  opacity: 0.55;
}

.stage-target-row {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: #4f6d67;
}

.stage-target-row strong {
  color: #1c3d37;
}

.stage-backup-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  color: var(--teal-700);
  background: #ffffff;
  border: 1px solid #bfe0d7;
  padding: 3px 7px;
  border-radius: 4px;
  margin-top: 2px;
}

.stage-publish-cta {
  margin-top: auto;
  height: 36px;
  border-radius: 5px;
  background: var(--teal-600);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background-color 0.25s ease, transform 0.25s ease;
}

.app-stage-window[data-step="3"] .stage-publish-cta {
  background: #0e9373;
  box-shadow: 0 0 0 4px rgba(14, 147, 115, 0.2);
}

/* Step Overlays inside Stage (Dropzone / Floating Bubble / Confirm Modal) */
.stage-drop-overlay {
  position: absolute;
  inset: 14px;
  z-index: 15;
  border: 2px dashed var(--teal-600);
  background: rgba(240, 250, 247, 0.92);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--teal-700);
  opacity: 0;
  pointer-events: none;
  transform: scale(0.98);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.app-stage-window[data-step="0"] .stage-drop-overlay.show-drop {
  opacity: 1;
  transform: scale(1);
}

.flying-doc-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: #ffffff;
  border: 1px solid var(--teal-600);
  border-radius: 6px;
  box-shadow: var(--shadow-float);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-primary);
  animation: floatPulse 2.2s ease-in-out infinite;
}

@keyframes floatPulse {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

/* Floating Bubble Toolbar on Step 2 */
.stage-floating-toolbar {
  position: absolute;
  top: 128px;
  right: 36px;
  z-index: 14;
  background: #1b2f32;
  color: #ffffff;
  padding: 5px 8px;
  border-radius: 6px;
  box-shadow: var(--shadow-float);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.app-stage-window[data-step="1"] .stage-floating-toolbar {
  opacity: 1;
  transform: translateY(0);
}

.swatch-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

/* Confirmation & Readback Modal on Step 4 */
.stage-confirm-modal {
  position: absolute;
  inset: 0;
  z-index: 18;
  background: rgba(21, 38, 40, 0.38);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.app-stage-window[data-step="3"] .stage-confirm-modal {
  opacity: 1;
}

.stage-modal-card {
  width: 100%;
  max-width: 410px;
  background: #ffffff;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-float);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stage-modal-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stage-modal-badge {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: var(--teal-50);
  color: var(--teal-600);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.stage-modal-head h4 {
  margin: 0;
  font-size: 15px;
  color: var(--ink-primary);
}

.stage-modal-head p {
  margin: 2px 0 0;
  font-size: 11px;
  color: var(--ink-muted);
}

.stage-verify-list {
  background: #f6faf9;
  border: 1px solid #d5e6e2;
  border-radius: 6px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11px;
  color: #284f47;
}

.stage-verify-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Guided Coach Callout Bar below Stage */
.stage-caption-bar {
  background: #182c2f;
  color: #e9f3f2;
  padding: 11px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
}

.caption-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.caption-step-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--teal-600);
  color: #ffffff;
  flex-shrink: 0;
}

.caption-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.caption-nav-btn {
  height: 28px;
  padding: 0 10px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  font-size: 12px;
}

.caption-nav-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Full-Width Bands for Sections (No nested floating section cards) */
.section-band {
  padding: 36px 0;
  border-bottom: 1px solid var(--border-color);
}

.section-band.surface-white {
  background: #ffffff;
}

.section-band.surface-subtle {
  background: var(--bg-page);
}

.section-header {
  max-width: 680px;
  margin-bottom: 18px;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--teal-600);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

.section-title-h2 {
  margin: 0;
  font-size: 22px;
  line-height: 1.35;
  font-weight: 650;
  color: #203d40;
}

.section-lead {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-secondary);
}

/* Feature Grid (Individual repeated items only, max 8px border-radius) */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 14px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.feature-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--teal-50);
  color: var(--teal-600);
  display: grid;
  place-items: center;
}

.feature-icon-box.blue {
  background: var(--confluence-bg);
  color: var(--confluence-blue);
}

.feature-icon-box.amber {
  background: var(--amber-bg);
  color: var(--amber-600);
}

.feature-card h3 {
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.4;
  font-weight: 650;
  color: var(--ink-primary);
}

.feature-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-secondary);
}

.feature-meta-tag {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  border-top: 1px solid #eef2f3;
}

/* Format Matrix & Security Comparison Table */
.matrix-layout {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 28px;
  align-items: start;
}

.data-table-wrap {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  background: #ffffff;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th,
.data-table td {
  padding: 8px 10px;
  border-bottom: 1px solid #eaeff0;
  text-align: left;
  vertical-align: top;
  line-height: 1.5;
}

.data-table th {
  background: #f4f8f8;
  font-weight: 650;
  color: var(--ink-primary);
  font-size: 12px;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.status-chip.ok {
  background: var(--teal-50);
  color: var(--teal-700);
}

.status-chip.guard {
  background: var(--amber-bg);
  color: var(--amber-600);
}

.security-checklist {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.security-item {
  padding: 16px 18px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: #ffffff;
}

.security-item h4 {
  margin: 0 0 6px;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-primary);
}

.security-item p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-secondary);
  line-height: 1.6;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.install-panel {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 14px 16px 16px;
  min-width: 0;
}

.install-panel.is-current {
  border-color: var(--teal-600);
}

.install-panel-head h3 {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.4;
  font-weight: 650;
}

.install-steps {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.install-steps li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-secondary);
}

.install-steps strong {
  color: var(--ink-primary);
  font-size: 14px;
}

.install-steps .cmd-box {
  margin-top: 8px;
}

.package-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.package-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #f8fbfb;
}

.package-row strong {
  display: block;
  font-size: 14px;
}

.package-row div div {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-muted);
}

.package-note {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--ink-muted);
}

.os-switch {
  display: inline-flex;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  overflow: hidden;
  background: #ffffff;
}

.os-switch-btn {
  height: 28px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 650;
  color: var(--ink-secondary);
}

.os-switch-btn.is-on {
  background: var(--teal-600);
  color: #ffffff;
}

/* macOS / Windows install panels */
.install-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.install-step-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.install-step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--teal-600);
  background: var(--teal-50);
  width: fit-content;
  padding: 2px 8px;
  border-radius: 4px;
}

.install-step-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}

.install-step-card p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-secondary);
}

.install-visual {
  margin-top: auto;
  padding: 12px;
  background: #f6f9f9;
  border: 1px solid #e1eaeb;
  border-radius: var(--radius-md);
  font-size: 12px;
}

.drag-anim-row {
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 6px 0;
}

.drag-arrow {
  color: var(--teal-600);
  animation: slideRight 1.6s ease-in-out infinite;
}

@keyframes slideRight {
  0%, 100% { transform: translateX(-4px); opacity: 0.6; }
  50% { transform: translateX(5px); opacity: 1; }
}

.cmd-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: #172a2d;
  color: #e4f2f0;
  padding: 8px 10px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.cmd-box code {
  overflow-x: auto;
  white-space: nowrap;
}

.cmd-copy {
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  font-size: 11px;
  flex-shrink: 0;
}

.cmd-copy:hover {
  background: var(--teal-600);
}

/* Release Notes & Real Screenshot Preview Band */
.release-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 16px;
  align-items: start;
}

.release-heading {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
  font-weight: 650;
}

.release-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px 16px 14px;
  min-width: 0;
}

.release-box-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid #eaeff0;
  margin-bottom: 14px;
}

.release-list {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-secondary);
}

.screenshot-frame {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-window);
  background: #ffffff;
}

.screenshot-frame img {
  display: block;
  width: 100%;
  height: auto;
}

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: #b7c8ca;
  padding: 40px 0;
  font-size: 13px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  font-weight: 700;
}

.footer-brand img {
  width: 24px;
  height: 24px;
}

.footer-links {
  display: flex;
  gap: 20px;
  color: #8fa6a9;
}

.footer-links a:hover {
  color: #ffffff;
}

/* Responsive Breakpoints */
@media (max-width: 1040px) {
  .stage-workspace {
    grid-template-columns: 185px minmax(0, 1fr) 250px;
  }
  .feature-grid,
  .install-grid,
  .platform-grid,
  .download-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .matrix-layout,
  .release-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .nav-links {
    display: none;
  }
  .nav-actions .btn-ghost span {
    display: none;
  }
  .site-header {
    height: auto;
  }
  .nav-inner {
    min-height: 60px;
  }
  .hero-title {
    font-size: 22px;
  }
  .section-title-h2 {
    font-size: 18px;
  }
  .download-row {
    align-items: flex-start;
  }
  .walkthrough-controls {
    grid-template-columns: 1fr;
  }
  .app-stage-window,
  .stage-workspace,
  .stage-center,
  .stage-publish {
    min-width: 0;
    max-width: 100%;
  }
  .stage-workspace {
    grid-template-columns: 1fr;
    height: auto;
  }
  .stage-topbar,
  .stage-tabs,
  .stage-doc-header,
  .stage-caption-bar,
  .caption-right {
    flex-wrap: wrap;
    height: auto;
    row-gap: 6px;
  }
  .stage-topbar {
    min-height: 40px;
    align-items: center;
    padding-top: 0;
    padding-bottom: 0;
  }
  .app-stage-window[data-os="windows"] .stage-topbar {
    flex-wrap: nowrap;
    align-items: stretch;
    height: 40px;
    padding-right: 0;
  }
  .app-stage-window[data-os="windows"] .stage-os-label,
  .app-stage-window[data-os="windows"] .stage-playback-btn {
    display: none;
  }
  .win-btn {
    width: 40px;
    height: 40px;
  }
  .stage-sidebar {
    display: none;
  }
  .stage-publish {
    border-left: 0;
    border-top: 1px solid var(--border-color);
  }
  .feature-grid,
  .install-grid,
  .platform-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .stage-topbar-right .stage-badge {
    display: none;
  }

  .package-row {
    align-items: flex-start;
    flex-direction: column;
  }
  .stage-caption-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

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