:root {
  --color-bg: #F4F8FF;
  --color-surface: #FFFFFF;
  --color-surface-soft: #EAF0FF;
  --color-primary: #4285F4;
  --color-primary-hover: #3367D6;
  --color-primary-soft: #E5EDFF;
  --color-accent: #FBBC05;
  --color-accent-soft: #FFF3C4;
  --color-text: #1F2A44;
  --color-text-soft: #4A556D;
  --color-muted: #6B748E;
  --color-faint: #98A2B3;
  --color-border: #D7E0F3;
  --color-success: #3BAA7A;
  --color-danger: #D96B6B;
  --color-warning: #F0A74B;
  --color-google-blue: #4285F4;
  --color-google-red: #EA4335;
  --color-google-yellow: #FBBC05;
  --color-google-green: #34A853;

  --space-xs: 6px;
  --space-sm: 12px;
  --space-md: 18px;
  --space-lg: 24px;
  --space-xl: 30px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --card-shadow: 0 12px 28px rgba(66, 84, 149, 0.12);

  --container-padding: clamp(16px, 4vw, 34px);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "PingFang SC",
    "Microsoft YaHei",
    "Helvetica Neue",
    Arial,
    sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
}

body {
  min-height: 100vh;
}

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

button,
input {
  font: inherit;
}

.page-shell {
  width: min(1200px, 100% - 32px);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgb(246 248 255 / 0.95);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  padding-top: 14px;
  padding-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  flex: 1;
  min-width: 0;
}

.brand-avatar {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: white;
  box-shadow: var(--card-shadow);
  display: grid;
  place-items: center;
}

.brand-title {
  margin: 0;
  font-size: 16px;
}

.brand-subtitle {
  margin: 0;
  font-size: 12px;
  color: var(--color-muted);
}

.menu-toggle {
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.menu-toggle span {
  height: 2px;
  background: var(--color-text);
  display: block;
}

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

.main-nav a {
  padding: 8px 10px;
  color: var(--color-text-soft);
  font-size: 14px;
  border-radius: 10px;
}

.main-nav a:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.header-action {
  border-radius: 10px;
  border: 1px solid var(--color-primary);
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 600;
}

.main-content {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
  display: grid;
  gap: var(--space-lg);
}

.hero {
  background:
    radial-gradient(760px 280px at 8% -10%, #EAF0FF 0%, transparent 70%),
    radial-gradient(700px 260px at 94% 12%, #FFF4D1 0%, transparent 75%),
    linear-gradient(180deg, #F9FCFF 0%, #FFFFFF 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 4vw, 34px);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: var(--space-xl);
}

.eyebrow {
  color: var(--color-primary);
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.hero p {
  margin: 0;
  color: var(--color-text-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  letter-spacing: 0.02em;
}

.btn-primary {
  color: #fff;
  background: var(--color-primary);
  box-shadow: 0 8px 18px rgba(91, 108, 255, 0.28);
}

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

.btn-secondary {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: #d9e2ff;
}

.btn-ghost {
  color: var(--color-text);
  background: var(--color-surface-soft);
  border-color: #dce4ff;
}

.hero-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.hero-meta li {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed var(--color-border);
  padding-bottom: 6px;
}

.hero-meta span {
  color: var(--color-text-soft);
}

.phone-mock {
  justify-self: center;
  width: min(280px, 100%);
  border-radius: 28px;
  padding: 12px;
  background: #161E2B;
  color: #fff;
  box-shadow: 0 18px 45px rgba(28, 33, 53, 0.3);
}

.phone-mock-inner {
  border-radius: 20px;
  background: #fff;
  color: var(--color-text);
  padding: 16px;
}

.phone-top {
  margin: 0;
  font-size: 12px;
  color: var(--color-text-soft);
}

.phone-content {
  margin-top: 12px;
  display: grid;
  gap: 12px;
}

.phone-badge {
  display: inline-block;
  width: fit-content;
  background: var(--color-surface-soft);
  color: var(--color-primary);
  font-size: 12px;
  border-radius: 999px;
  padding: 6px 10px;
  border: 1px solid var(--color-primary-soft);
}

.phone-photo {
  height: 110px;
  border-radius: 12px;
  background: linear-gradient(135deg, #dfe7ff, #f8faff);
}

.phone-footer {
  font-size: 12px;
  text-align: center;
  color: var(--color-text-soft);
  border-top: 1px solid var(--color-border);
  padding-top: 8px;
}

.section {
  display: grid;
  gap: var(--space-md);
}

.section-heading h2 {
  margin: 0 0 5px;
  font-size: clamp(22px, 3vw, 32px);
}

.tiny-label {
  margin: 0;
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.google-style-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.google-ribbon-card .module-sub {
  margin: 0;
}

.google-ribbon {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-radius: 14px;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.google-ribbon span {
  color: #fff;
  text-align: center;
  padding: 14px 10px;
  font-weight: 700;
  font-size: 13px;
}

.google-state-grid {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.google-state-grid div {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
}

.google-state-grid strong {
  font-size: 14px;
  color: var(--color-text);
}

.google-state-grid small {
  color: var(--color-text-soft);
  font-size: 12px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
}

.google-blue {
  background: var(--color-google-blue);
}

.google-red {
  background: var(--color-google-red);
}

.google-yellow {
  color: #1f2937;
  background: var(--color-google-yellow);
}

.google-green {
  background: var(--color-google-green);
}

.google-bullet-list {
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.google-bullet-list li {
  list-style: none;
  border: 1px dashed var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: 12px;
  padding: 10px;
  color: var(--color-text-soft);
}

.google-bullet-list li span {
  color: var(--color-text);
}

.overview-grid,
.module-grid,
.code-layout,
.template-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: #fff;
  border: 1px solid #dce4ff;
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  padding: 18px;
}

.card h3 {
  margin-top: 0;
}

.palette {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.swatch {
  min-width: 112px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px;
}

.swatch.bg-bg {
  background: var(--color-bg);
}

.swatch.bg-surface {
  background: var(--color-surface);
}

.swatch.bg-surface-soft {
  background: var(--color-surface-soft);
}

.swatch.bg-primary {
  color: #fff;
  background: var(--color-primary);
}

.swatch.bg-accent {
  background: var(--color-accent);
  color: #3d3100;
}

.swatch strong,
.swatch small {
  display: block;
}

.module-card .module-demo {
  margin: 12px 0 14px;
}

.module-head .tag {
  margin: 0 0 4px;
  font-size: 12px;
  color: var(--color-muted);
}

.module-card p {
  margin: 8px 0 0;
  color: var(--color-text-soft);
}

.demo-nav,
.demo-form {
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.mini-card {
  background: #fff;
  border: 1px dashed var(--color-border);
  border-radius: 12px;
  padding: 12px;
}

.mini-card p {
  margin: 0;
  color: var(--color-text-soft);
}

.mini-card strong {
  display: block;
  margin-top: 10px;
  font-size: 22px;
}

.demo-form input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 10px 12px;
  background: #fff;
}

.demo-form button {
  border: 0;
  background: var(--color-primary);
  color: #fff;
  border-radius: 12px;
  padding: 10px 14px;
}

.module-card pre,
.code-layout pre {
  margin: 0;
  max-height: 110px;
  overflow: auto;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: #111827;
  color: #e5e7eb;
  font-size: 13px;
  line-height: 1.5;
  padding: 10px;
}

.copy-btn {
  margin-top: 8px;
  border: 0;
  border-radius: 10px;
  background: #111827;
  color: #f8fafc;
  padding: 8px 12px;
  cursor: pointer;
}

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

.pipeline-shell {
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.pipeline-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(210px, 1fr);
  gap: 12px;
  padding: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}

.pipeline-item {
  scroll-snap-align: start;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 14px;
}

.pipeline-item .tiny {
  margin: 0;
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
}

.pipeline-item p {
  margin: 8px 0 0;
  color: var(--color-text-soft);
}

.step-note {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--color-text-soft);
}

.template-switch {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pill {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 12px;
  background: #fff;
  color: var(--color-text-soft);
  cursor: pointer;
}

.pill.active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: #d8deff;
}

.template-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 14px;
}

.template-card[data-hide="true"] {
  display: none;
}

.template-card p {
  margin: 8px 0 0;
  color: var(--color-text-soft);
}

.code-layout {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.code-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.final-placeholder {
  min-height: 110px;
  display: grid;
  place-content: center;
  text-align: center;
  color: var(--color-text-soft);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 20px;
  padding: 22px 0 30px;
  color: var(--color-muted);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .google-style-grid {
    grid-template-columns: 1fr;
  }

  .overview-grid,
  .module-grid,
  .code-layout,
  .template-grid {
    grid-template-columns: 1fr;
  }

  .template-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .page-shell {
    width: calc(100% - 20px);
    padding: 0 var(--space-sm);
  }

  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 64px;
    right: 16px;
    left: 16px;
    flex-direction: column;
    padding: 10px;
    border-radius: 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--card-shadow);
    display: none;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
  }

  .header-action {
    display: none;
  }

  .hero {
    padding: 16px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .card-row,
  .template-grid {
    grid-template-columns: 1fr;
  }
}

/* Google-inspired visual tightening for homepage and module previews */
.site-header {
  box-shadow: 0 8px 24px rgba(29, 47, 110, 0.08);
  border-bottom-color: #d8e2f7;
}

.header-inner {
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand-avatar {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  border: 1px solid #dce7ff;
  background: linear-gradient(135deg, #fff 35%, #f0f4ff 100%);
}

.main-nav a {
  position: relative;
  overflow: hidden;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 12px;
  bottom: 8px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 200ms ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  width: calc(100% - 24px);
}

.header-action {
  background: linear-gradient(180deg, #fff 0%, #f4f8ff 100%);
  border-color: #b9cdff;
  box-shadow: 0 8px 22px rgba(66, 133, 244, 0.18);
}

.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid #d6e1fa;
  background:
    radial-gradient(620px 230px at 4% -4%, #e8f0ff 0%, transparent 65%),
    radial-gradient(560px 210px at 100% 22%, #fff6d8 0%, transparent 65%),
    radial-gradient(420px 180px at 75% 86%, rgba(234, 67, 53, 0.12) 0%, transparent 68%),
    linear-gradient(180deg, #f9fcff 0%, #ffffff 100%);
  box-shadow: 0 22px 42px rgba(50, 70, 145, 0.14);
}

.hero::before,
.hero::after {
  content: '';
  position: absolute;
  z-index: -1;
  border-radius: 50%;
  pointer-events: none;
}

.hero::before {
  width: 330px;
  height: 330px;
  left: -90px;
  top: -120px;
  background: radial-gradient(circle, rgba(66, 133, 244, 0.24), transparent 65%);
  filter: blur(14px);
}

.hero::after {
  width: 220px;
  height: 220px;
  right: -70px;
  bottom: -90px;
  background: radial-gradient(circle, rgba(66, 133, 244, 0.18), transparent 67%);
  filter: blur(10px);
}

.hero-copy h1 {
  text-wrap: balance;
}

.hero-copy p {
  font-size: clamp(15px, 1.6vw, 17px);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.hero-meta li {
  border-radius: 12px;
  border: 1px solid #d7e2f8;
  padding: 8px 12px;
  background: var(--color-surface);
  box-shadow: 0 4px 10px rgba(66, 133, 244, 0.08);
}

.btn {
  letter-spacing: 0.04em;
  transition:
    transform 140ms ease,
    box-shadow 140ms ease,
    background-color 140ms ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(180deg, #4c74ff 0%, var(--color-primary) 100%);
  box-shadow: 0 12px 24px rgba(74, 109, 239, 0.35);
}

.btn-secondary {
  background: #fff;
  color: var(--color-primary);
  border-color: #c8d6ff;
}

.phone-mock {
  background: #161e2b;
  border: 0;
  position: static;
}

.phone-mock::before {
  display: none;
}

.phone-mock-inner {
  border: 0;
}

.section-heading h2 {
  font-size: clamp(24px, 3vw, 34px);
}

.card {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: #fff;
  box-shadow: var(--card-shadow);
}

.module-head {
  padding-bottom: 10px;
  border-bottom: 1px dashed #d9e1f5;
}

.card-row,
.template-grid,
.module-grid {
  row-gap: 14px;
}

.mini-card {
  background: #fff;
  border: 1px solid #dce6fa;
}

.module-demo {
  gap: 12px;
}

.demo-form button,
.module-demo button {
  background: var(--color-primary);
  color: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 18px rgba(66, 133, 244, 0.26);
}

.pipeline-shell {
  border: 1px solid #dae4fb;
  border-radius: 22px;
  padding: 16px;
  background: #fff;
}

.pipeline-item {
  background: #fff;
  border: 1px solid #d7e2fb;
  border-radius: 16px;
  box-shadow: none;
}

.pipeline-item h3 {
  margin-top: 6px;
}

.template-switch {
  align-items: stretch;
}

.template-switch .pill {
  border: 1px solid #d3e0ff;
  background: #fff;
  color: #3b4660;
  border-radius: 999px;
  transition: all 160ms ease;
}

.template-switch .pill:hover {
  color: #2d64ef;
  border-color: #95b1ff;
}

.template-switch .pill.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: #c8d6ff;
  box-shadow: none;
}

.template-card {
  border-radius: 18px;
  border: 1px solid #d7e3ff;
  background: #fff;
}

.template-card h3 {
  color: #25314a;
}

.copy-btn {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid #bed0ff;
  background: #fff;
  color: #2f5dd6;
  font-weight: 700;
}

.copy-btn:hover {
  background: #eef4ff;
}

.step-note {
  color: var(--color-text-soft);
}

.google-ribbon-card {
  border-left: none;
  overflow: hidden;
}

.google-ribbon-card::after {
  content: '';
  position: absolute;
  right: 20px;
  bottom: -16px;
  width: 120px;
  height: 80px;
  border-radius: 100px;
  background: radial-gradient(circle, rgba(52, 168, 83, 0.16), transparent 65%);
  pointer-events: none;
}

.google-state-grid > div {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid #dbe7fd;
  border-radius: 12px;
  background: #fff;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px rgba(30, 48, 122, 0.14);
}

.google-bullet-list li {
  border: 1px solid #d8e4ff;
  border-left: 5px solid #4285f4;
  background: #fff;
  border-radius: 10px;
}

code {
  background: #0f172a;
  border-color: #c9d6ef;
  color: #e6edf9;
}

pre {
  border-radius: 14px;
}

@media (max-width: 1024px) {
  .google-style-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .page-shell {
    width: min(1200px, 100% - 16px);
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }

  .google-style-grid {
    grid-template-columns: 1fr;
  }
}
/* Selective color accents: reserved for a few showcase windows only. */
#code-gallery .card:first-child {
  border-color: transparent;
  background:
    linear-gradient(var(--color-surface), var(--color-surface)) padding-box,
    linear-gradient(135deg, #4285f4 0%, #8ab4f8 48%, #d2e3fc 100%) border-box;
  box-shadow: 0 14px 32px rgba(66, 133, 244, 0.12);
}

#code-gallery .card:nth-child(2) {
  border-color: transparent;
  background:
    linear-gradient(var(--color-surface), var(--color-surface)) padding-box,
    linear-gradient(135deg, #fbbc05 0%, #ea4335 52%, #fce8e6 100%) border-box;
  box-shadow: 0 14px 32px rgba(234, 67, 53, 0.1);
}

.template-card:nth-child(2) {
  border-color: transparent;
  background:
    linear-gradient(var(--color-surface), var(--color-surface)) padding-box,
    linear-gradient(135deg, #34a853 0%, #8ad7ae 52%, #d9f2e3 100%) border-box;
  box-shadow: 0 12px 28px rgba(52, 168, 83, 0.1);
}

.pipeline-item:nth-child(3) {
  border-color: transparent;
  background:
    linear-gradient(var(--color-surface), var(--color-surface)) padding-box,
    linear-gradient(135deg, #4285f4 0%, #fbbc05 48%, #ea4335 100%) border-box;
  box-shadow: 0 12px 28px rgba(66, 133, 244, 0.1);
}