/* ============================================================
 * LucidWrite Landing page
 * 复用 styles.css 的 token，DESIGN.md §5 留白、§3 排印梯度
 * ============================================================ */

body.landing {
  display: block;
  position: relative;          /* 给 .lp-paper 当 absolute 锚点 */
  width: 100%;
  height: auto;
  min-height: 100vh;
  overflow: auto;
  background: var(--background);
}

/* ============================================================
 * Notebook paper + pencil — 横线背景 + canvas 接受铅笔拖动笔触
 * 跟 LucidWrite "写作工作台" 主题强绑定。无彩色,纯 editorial。
 * ============================================================ */

/* 全局淡蓝光斑层 —— fixed 跟随 viewport,鼠标走到 paper 区外依然跟着 */
.lp-shadow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
}

/* paper 容器:纯定位框,不创建 stacking context(无 z-index),
   让内部 canvas 的 z-index 在 body 上下文里直接生效 */
.lp-paper {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1200px;
  pointer-events: none;
}

/* 两层 canvas 共享尺寸,共享底部纵向渐隐 */
.lp-paper-bg,
.lp-paper-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 50%, transparent 80%);
  mask-image: linear-gradient(180deg, #000 0%, #000 50%, transparent 80%);
}

/* 横线层:额外叠一层横向渐隐(笔记本左右页边留白),
   两层 mask 取交集,横线只在中段满显;
   fg canvas 不动,鼠标/铅笔笔迹依旧覆盖全宽 */
.lp-paper-bg {
  -webkit-mask-image:
    linear-gradient(180deg, #000 0%, #000 50%, transparent 80%),
    linear-gradient(90deg, transparent 0%, #000 10%, #000 90%, transparent 100%);
  mask-image:
    linear-gradient(180deg, #000 0%, #000 50%, transparent 80%),
    linear-gradient(90deg, transparent 0%, #000 10%, #000 90%, transparent 100%);
  -webkit-mask-composite: source-in;     /* WebKit 老语法 */
  mask-composite: intersect;              /* 标准语法 */
}

/* 背景层:横线(笔扰动),沉到所有内容之下;光斑已抽到 .lp-shadow */
.lp-paper-bg {
  z-index: -1;
  pointer-events: none;
}

/* 前景层:铅笔笔迹,接收鼠标事件,显示铅笔光标 */
.lp-paper-canvas {
  z-index: 5;
  pointer-events: auto;
  cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 48 48'><g transform='rotate(-30 24 24)'><rect x='18' y='6' width='12' height='6' rx='1.5' fill='%23E8A0A0'/><rect x='18' y='12' width='12' height='3' fill='%23B0B0B8'/><rect x='18' y='15' width='12' height='20' fill='%23F0C040'/><line x1='24' y1='15' x2='24' y2='35' stroke='%23C9A040' stroke-width='0.5'/><polygon points='18,35 30,35 27,42 21,42' fill='%23F2DBAA'/><polygon points='21,42 27,42 24,46' fill='%23191919'/></g></svg>") 35 43, crosshair;
}

/* 交互元素(在 paper 区内的)单独抬到 canvas 之上,保证可点击。
   .lp-nav 已经 sticky + z:20,自动在 canvas 之上,不用动。
   注意:容器本身 pointer-events: none,免得空白处的长方形 hit-box 挡住
   canvas 的 pointermove,造成"画笔画不到的隐形矩形" bug。
   只让真正要点击的按钮 / 链接 / preview 内容恢复 auto。 */
.lp-hero-cta,
.lp-preview-wrap {
  position: relative;
  z-index: 10;
  pointer-events: none;
}
.lp-hero-cta > a,
.lp-hero-cta > button {
  pointer-events: auto;
}

/* CTA / 链接 / 输入框上恢复正常光标 —— 在 hero 内的按钮要能正常点 */
.lp-nav a,
.lp-nav button,
.lp-hero a,
.lp-hero button,
.lp-hero input,
.lp-preview a,
.lp-preview button,
.lp-preview input {
  cursor: pointer;
}

/* 触屏 / reduced-motion:不渲染 canvas,光标回归默认;横线仍可见作装饰 */
@media (prefers-reduced-motion: reduce), (hover: none) {
  .lp-paper-canvas,
  .lp-shadow {
    display: none;
  }
}

/* ============================================================
 * Login modal — 复用 styles.css 里 .auth-* 全套(品牌一致)
 * 这里只定义 modal 自身的定位 / backdrop / close 按钮
 * ============================================================ */

.lp-auth-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.lp-auth-modal[hidden] { display: none; }

.lp-auth-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(25, 25, 25, 0.45);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  backdrop-filter: blur(8px) saturate(120%);
}

.lp-auth-card {
  position: relative;
  width: 100%;
  max-width: 400px;
  padding: 32px;
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-large);
  background: var(--background);
  box-shadow: 0 24px 64px rgba(25, 25, 25, 0.12);
}

.lp-auth-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  border-radius: var(--lp-radius-comfortable);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--lp-text-muted);
  transition: background 120ms ease, color 120ms ease;
}
.lp-auth-close:hover {
  background: var(--lp-surface-hover);
  color: var(--lp-text-strong);
}

html:has(body.landing) {
  width: 100%;
  height: auto;
  overflow: auto;
}

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

/* ============================================================
 * Sticky nav
 * ============================================================ */

.lp-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--lp-border-divider);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
}

.lp-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.lp-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--lp-text-strong);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.lp-brand-mark {
  display: inline-block;
  width: 22px;
  height: 22px;
  color: var(--lp-text-strong);     /* 内联 SVG 用 currentColor,跟品牌字色一致 */
  flex-shrink: 0;
}

.lp-nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lp-nav-links a {
  color: var(--lp-text-muted);
  font-size: 14px;
  font-weight: 400;
  transition: color 120ms ease;
}

.lp-nav-links a:hover {
  color: var(--lp-text-strong);
}

.lp-nav-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.lp-nav-actions .send-button,
.lp-nav-actions .secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  font-size: 13px;
}

/* ============================================================
 * Hero
 * ============================================================ */

.lp-hero {
  max-width: 1040px;
  margin: 0 auto;
  padding: 120px 24px 64px;
  text-align: center;
}

.lp-hero .eyebrow {
  display: inline-block;
  margin: 0 0 24px;
}

.lp-hero-title {
  margin: 0;
  font-size: 60px;
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--lp-text-strong);
  word-break: keep-all;
  text-wrap: pretty;
}

.lp-hero-title em {
  font-style: normal;
  color: var(--lp-text-subtle);
  font-weight: 500;
}

.lp-hero-sub {
  margin: 28px auto 0;
  max-width: 640px;
  color: var(--lp-text-muted);
  font-size: 18px;
  line-height: 1.6;
}

.lp-hero-cta {
  margin-top: 40px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.lp-hero-cta .send-button,
.lp-hero-cta .secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 22px;
  font-size: 14px;
}

.lp-hero-meta {
  margin: 20px 0 0;
  color: var(--lp-text-subtle);
  font-size: 12px;
  letter-spacing: 0.02em;
}

/* ============================================================
 * Hero process strip — 7 steps preview
 * ============================================================ */

.lp-hero-strip {
  max-width: 1100px;
  margin: 80px auto 0;
  padding: 0 24px;
}

.lp-strip-frame {
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-large);
  padding: 28px 24px;
  background: var(--background);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 4px;
}

.lp-strip-step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 14px;
  border-radius: var(--lp-radius-pill);
  background: var(--lp-bg);
  color: var(--lp-text-strong);
  font-size: 13px;
  font-weight: 400;
}

.lp-strip-step .lp-strip-num {
  color: var(--lp-text-subtle);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.lp-strip-step.is-active {
  background: var(--lp-accent);
  color: var(--background);
  font-weight: 500;
}

.lp-strip-step.is-active .lp-strip-num {
  color: rgba(255, 255, 255, 0.55);
}

.lp-strip-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 32px;
  color: var(--lp-text-subtle);
}

.lp-strip-arrow svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ============================================================
 * Section frame
 * ============================================================ */

.lp-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 96px 24px;
}

.lp-section-header {
  max-width: 720px;
  margin-bottom: 56px;
}

.lp-section-header .eyebrow {
  margin: 0 0 16px;
}

.lp-section-title {
  margin: 0;
  font-size: 44px;
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--lp-text-strong);
  /* CJK 不在汉字之间拆词,只在空格 / 全角标点处断行,避免"输出"被劈成"输/出"。
     text-wrap: pretty 是现代浏览器的平衡换行兜底。 */
  word-break: keep-all;
  text-wrap: pretty;
}

.lp-section-sub {
  margin: 18px 0 0;
  max-width: 560px;
  color: var(--lp-text-muted);
  font-size: 15px;
  line-height: 1.6;
}

/* ============================================================
 * Process grid — 七步
 * grid 用 1px gap + 外层 border 做"分割线",卡内白底
 * ============================================================ */

.lp-process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--lp-border-subtle);
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-large);
  overflow: hidden;
  /* 子 cell 受 overflow:hidden 裁切,阴影加在容器上 */
  box-shadow: 0 1px 2px rgba(25, 25, 25, 0.03), 0 8px 20px rgba(25, 25, 25, 0.05);
}

/* 卡片节奏:大数字锚点 (32) → 小标签 (12) → 主体 (22) → 细节 (13)
   留白权重也分两组:header → h3 是 group break (24),h3 → p 是 group inner (10) */
.lp-step {
  padding: 36px 28px;
  background: var(--background);
  display: flex;
  flex-direction: column;
  min-height: 240px;
}

.lp-step-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 24px;
}

.lp-step-index {
  font-size: 32px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--lp-text-strong);
}

.lp-step-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--lp-text-subtle);
}

.lp-step h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--lp-text-strong);
  /* 卡片标题是纯 CJK 短句,没有标点 / 空格作断点 —— 让浏览器自由断行,
     不加 keep-all 免得无处可断顶出卡片。 */
  text-wrap: pretty;
}

.lp-step p {
  margin: 0;
  color: var(--lp-text-subtle);
  font-size: 13px;
  line-height: 1.75;
}

/* ============================================================
 * Why grid — 三/四张卡
 * ============================================================ */

.lp-why-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.lp-why-card {
  padding: 32px;
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-large);
  background: var(--background);
  box-shadow: 0 1px 2px rgba(25, 25, 25, 0.03), 0 8px 20px rgba(25, 25, 25, 0.05);
}

.lp-why-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--lp-text-strong);
}

.lp-why-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--lp-radius-panel);
  background: var(--lp-bg);
  color: var(--lp-text-strong);
}

.lp-why-card-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.lp-why-card h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.lp-why-card p {
  margin: 4px 0 0;
  color: var(--lp-text-muted);
  font-size: 14px;
  line-height: 1.75;
}

/* ============================================================
 * Spec table — 集成 / 模型 / 存储
 * ============================================================ */

.lp-spec {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--lp-border-subtle);
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-large);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(25, 25, 25, 0.03), 0 8px 20px rgba(25, 25, 25, 0.05);
}

.lp-spec-cell {
  padding: 28px;
  background: var(--background);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lp-spec-label {
  color: var(--lp-text-subtle);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lp-spec-value {
  color: var(--lp-text-strong);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.lp-spec-note {
  margin-top: 8px;
  color: var(--lp-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* ============================================================
 * Workspace preview — 3 列 shell 的静态视觉
 * ============================================================ */

.lp-preview-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.lp-preview {
  position: relative;
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-large);
  overflow: hidden;
  background: var(--background);
  box-shadow: 0 2px 4px rgba(25, 25, 25, 0.04), 0 16px 40px rgba(25, 25, 25, 0.06);
}

.lp-preview-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--lp-border-divider);
  background: var(--lp-bg);
}

.lp-preview-chrome i {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--color-black-a6);
  display: inline-block;
}

.lp-preview-chrome span {
  margin-left: 12px;
  color: var(--lp-text-subtle);
  font-size: 12px;
  font-family: var(--font-mono);
}

.lp-preview-shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 280px;
  min-height: 480px;
}

.lp-preview-side {
  border-right: 1px solid var(--lp-border-divider);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--background);
}

.lp-preview-side-title {
  color: var(--lp-text-muted);
  font-size: 12px;
  font-weight: 500;
}

.lp-preview-tree {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.lp-preview-file {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 8px;
  border-radius: var(--lp-radius-card);
  color: var(--lp-text-muted);
  font-size: 13px;
}

.lp-preview-file.is-active {
  background: var(--lp-surface-hover);
  color: var(--lp-text-strong);
}

.lp-preview-file-dot {
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: var(--lp-text-subtle);
}

.lp-preview-file.is-active .lp-preview-file-dot {
  background: var(--lp-accent);
}

.lp-preview-main {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  background: var(--background);
}

.lp-preview-process {
  display: flex;
  gap: 6px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--lp-border-divider);
  overflow: hidden;
}

.lp-preview-process span {
  height: 28px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--lp-radius-pill);
  color: var(--lp-text-muted);
  font-size: 12px;
  white-space: nowrap;
}

.lp-preview-process span.is-active {
  background: var(--lp-accent);
  color: var(--background);
  font-weight: 500;
}

.lp-preview-process span.is-done {
  background: var(--lp-accent-soft);
  color: var(--lp-text-strong);
}

.lp-preview-process span.is-done::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 6px;
  border-radius: 999px;
  background: var(--lp-text-strong);
}

.lp-preview-draft-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px 0;
}

.lp-preview-draft-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--lp-text-strong);
}

.lp-preview-draft-actions {
  display: flex;
  gap: 6px;
}

.lp-preview-pill {
  height: 28px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--lp-radius-comfortable);
  font-size: 12px;
  font-weight: 500;
  color: var(--lp-text-strong);
  border: 1px solid var(--lp-border-subtle);
  background: var(--background);
}

.lp-preview-pill.is-primary {
  background: var(--lp-accent);
  color: var(--background);
  border-color: var(--lp-accent);
}

.lp-preview-draft {
  padding: 16px 24px 24px;
  overflow: hidden;
}

.lp-preview-draft h4 {
  margin: 8px 0 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--lp-text-strong);
}

.lp-preview-draft p {
  margin: 0 0 10px;
  color: var(--foreground);
  font-size: 13px;
  line-height: 1.7;
}

.lp-preview-draft p:nth-child(3) { width: 96%; }
.lp-preview-draft p:nth-child(4) { width: 88%; }

.lp-preview-cursor {
  display: inline-block;
  width: 6px;
  height: 12px;
  vertical-align: -2px;
  background: var(--lp-accent);
  margin-left: 2px;
  animation: lp-blink 1.1s steps(1) infinite;
}

@keyframes lp-blink {
  50% { opacity: 0; }
}

.lp-preview-chat {
  border-left: 1px solid var(--lp-border-divider);
  display: flex;
  flex-direction: column;
}

.lp-preview-chat-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--lp-border-divider);
}

.lp-preview-chat-eyebrow {
  color: var(--lp-text-subtle);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.lp-preview-chat-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--lp-text-strong);
}

.lp-preview-chat-body {
  flex: 1;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
}

.lp-preview-msg {
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-card);
  padding: 10px 12px;
  background: var(--background);
}

.lp-preview-msg.is-user {
  background: var(--lp-bg);
}

.lp-preview-msg-meta {
  color: var(--lp-text-subtle);
  font-size: 11px;
  margin-bottom: 4px;
}

.lp-preview-msg-body {
  color: var(--foreground);
  font-size: 13px;
  line-height: 1.6;
}

.lp-preview-composer {
  border-top: 1px solid var(--lp-border-divider);
  padding: 10px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 56px;
  gap: 8px;
}

.lp-preview-composer-input {
  height: 64px;
  border: 1px solid var(--lp-border-subtle);
  border-radius: var(--lp-radius-card);
  padding: 8px 10px;
  color: var(--lp-text-subtle);
  font-size: 12px;
}

.lp-preview-composer-btn {
  height: 64px;
  border-radius: var(--lp-radius-card);
  background: var(--lp-accent);
  color: var(--background);
  font-size: 13px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
 * Pull quote — editorial 哲学陈述
 * ============================================================ */

.lp-quote {
  max-width: 920px;
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}

.lp-quote blockquote {
  margin: 0;
  font-size: 32px;
  line-height: 1.35;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--lp-text-strong);
}

.lp-quote blockquote em {
  font-style: normal;
  color: var(--lp-text-subtle);
}

.lp-quote-cite {
  display: block;
  margin-top: 24px;
  color: var(--lp-text-subtle);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ============================================================
 * FAQ
 * ============================================================ */

.lp-faq {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--lp-border-subtle);
}

.lp-faq details {
  border-bottom: 1px solid var(--lp-border-subtle);
}

.lp-faq summary {
  list-style: none;
  cursor: pointer;
  padding: 24px 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  color: var(--lp-text-strong);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: color 120ms ease;
}

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

.lp-faq summary:hover {
  color: var(--lp-text-primary);
}

.lp-faq-icon {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--lp-text-muted);
  transition: transform 200ms ease;
}

.lp-faq-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.lp-faq details[open] .lp-faq-icon {
  transform: rotate(45deg);
}

.lp-faq-answer {
  padding: 0 0 24px;
  max-width: 720px;
  color: var(--lp-text-muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ============================================================
 * Reveal animation — DESIGN.md §7
 * ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 400ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
 * Final CTA
 * ============================================================ */

.lp-final {
  max-width: 1040px;
  margin: 0 auto;
  padding: 128px 24px;
  text-align: center;
}

.lp-final h2 {
  margin: 0;
  font-size: 44px;
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--lp-text-strong);
  word-break: keep-all;
  text-wrap: pretty;
}

.lp-final p {
  margin: 20px auto 32px;
  max-width: 520px;
  color: var(--lp-text-muted);
  font-size: 16px;
  line-height: 1.65;
}

.lp-final .send-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 500;
}

/* ============================================================
 * Footer
 * ============================================================ */

.lp-footer {
  border-top: 1px solid var(--lp-border-divider);
}

.lp-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--lp-text-subtle);
  font-size: 13px;
  flex-wrap: wrap;
}

.lp-footer a {
  color: var(--lp-text-muted);
  transition: color 120ms ease;
}

.lp-footer a:hover {
  color: var(--lp-text-strong);
}

.lp-footer-meta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

/* ============================================================
 * Responsive
 * ============================================================ */

@media (max-width: 1024px) {
  .lp-process {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lp-spec {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .lp-preview-shell {
    grid-template-columns: 180px minmax(0, 1fr);
    min-height: 420px;
  }

  .lp-preview-chat {
    display: none;
  }
}

@media (max-width: 720px) {
  .lp-nav-inner {
    padding: 12px 16px;
  }

  .lp-preview-shell {
    grid-template-columns: 1fr;
    min-height: 360px;
  }

  .lp-preview-side {
    display: none;
  }

  .lp-quote {
    padding: 64px 20px;
  }

  .lp-quote blockquote {
    font-size: 22px;
    letter-spacing: -0.01em;
  }

  .lp-faq summary {
    font-size: 15px;
    padding: 20px 0;
  }

  .lp-faq-answer {
    font-size: 14px;
  }


  .lp-nav-links {
    display: none;
  }

  .lp-hero {
    padding: 72px 20px 48px;
  }

  .lp-hero-title {
    font-size: 36px;
    letter-spacing: -0.02em;
  }

  .lp-hero-sub {
    font-size: 16px;
  }

  .lp-hero-strip {
    margin-top: 56px;
    padding: 0 16px;
  }

  .lp-strip-frame {
    padding: 20px 16px;
  }

  .lp-section {
    padding: 64px 20px;
  }

  .lp-section-title {
    font-size: 28px;
    font-weight: 500;
    letter-spacing: -0.015em;
  }

  .lp-section-sub {
    font-size: 14px;
    line-height: 1.65;
    margin-top: 14px;
  }

  .lp-step h3,
  .lp-why-card h3 {
    font-size: 20px;
    letter-spacing: -0.01em;
  }

  .lp-step {
    padding: 28px 22px;
    min-height: 0;
  }

  .lp-step-header {
    margin-bottom: 18px;
  }

  .lp-step-index {
    font-size: 26px;
  }

  .lp-step p {
    font-size: 13px;
    line-height: 1.7;
  }

  .lp-spec-value {
    font-size: 18px;
  }

  .lp-process {
    grid-template-columns: 1fr;
  }

  .lp-why-grid {
    grid-template-columns: 1fr;
  }

  .lp-final {
    padding: 80px 20px;
  }

  .lp-final h2 {
    font-size: 32px;
  }
}