:root {
  --layout-max: 1080px;
  --layout-pad: 28px;
  --header-h: 64px;
  --bg: #f4f6fb;
  --bg-elevated: #ffffff;
  --text: #1d1d1f;
  --muted: #5c5c66;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --border: rgba(0, 0, 0, 0.08);
  --radius: 16px;
  --shadow: 0 20px 50px rgba(30, 45, 90, 0.12);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Segoe UI", sans-serif;
  --hero-bg: linear-gradient(155deg, #eef2fa 0%, #e2e9f6 42%, #d6dff0 100%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background: var(--bg);
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* One width for header, main, footer */
.layout {
  width: 100%;
  max-width: var(--layout-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--layout-pad);
  padding-right: var(--layout-pad);
}

/* Header — fixed lang switch slot on the right */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(244, 246, 251, 0.82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(1.25);
}

.site-header__bar {
  height: var(--header-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.22);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 20px;
  font-size: 0.92rem;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.lang-switch a {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
}

.lang-switch a:hover {
  text-decoration: none;
  color: var(--text);
}

.lang-switch a.is-active {
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Legacy floating hero icon — must not appear */
.icon-float,
.icon-orb {
  display: none !important;
}

/* Hero — light studio, glass screenshots + reflection */
.hero {
  position: relative;
  width: 100%;
  min-height: calc(100svh - var(--header-h));
  min-height: calc(100vh - var(--header-h));
  padding: 40px 0 56px;
  overflow: hidden;
  background: var(--hero-bg);
}

.hero__mosaic {
  position: relative;
  width: min(1040px, 92vw);
  height: min(560px, 58vh);
  margin: 0 auto;
  perspective: 1600px;
  perspective-origin: 50% 40%;
}

.glass-panel {
  position: absolute;
  margin: 0;
  transform-style: preserve-3d;
}

.glass-panel__frame {
  border-radius: 22px;
  padding: 11px;
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(22px) saturate(1.35);
  -webkit-backdrop-filter: blur(22px) saturate(1.35);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.95) inset,
    0 28px 70px rgba(40, 55, 100, 0.18),
    0 10px 28px rgba(40, 55, 100, 0.1);
}

.glass-panel__body {
  border-radius: 14px;
  overflow: hidden;
  line-height: 0;
  background: #fff;
}

.glass-panel__body img {
  display: block;
  width: 100%;
  height: auto;
}

.glass-panel__shine {
  position: absolute;
  inset: 0;
  border-radius: 22px;
  pointer-events: none;
  background: linear-gradient(
    125deg,
    rgba(255, 255, 255, 0.55) 0%,
    transparent 42%,
    transparent 70%,
    rgba(255, 255, 255, 0.15) 100%
  );
}

.glass-panel__reflection {
  margin-top: 10px;
  padding: 0 11px 0;
  transform: scaleY(-1);
  opacity: 0.26;
  filter: blur(0.3px);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55) 0%, transparent 72%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55) 0%, transparent 72%);
}

.glass-panel__reflection img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
}

.glass-panel--main {
  left: 50%;
  top: 6%;
  width: 62%;
  transform: translateX(-50%) rotateY(-7deg) rotateX(7deg) translateZ(30px);
  z-index: 2;
}

.glass-panel--memo {
  right: -2%;
  bottom: 2%;
  width: 44%;
  transform: rotateY(11deg) rotateX(-3deg) translateZ(80px);
  z-index: 4;
}

.glass-panel--tags {
  left: -4%;
  top: 18%;
  width: 42%;
  transform: rotateY(-12deg) rotateX(4deg) translateZ(50px);
  z-index: 3;
}

.hero__tagline {
  margin: 36px auto 0;
  text-align: center;
  font-size: clamp(1.45rem, 3.8vw, 2.35rem);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: #1a1a22;
  max-width: 16em;
}

.hero__tagline-sub {
  margin: 12px auto 0;
  text-align: center;
  font-size: 1.02rem;
  color: var(--muted);
  max-width: 28em;
}

/* Main content */
.page-main {
  padding: 56px 0 72px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 32px;
  margin-bottom: 22px;
}

.card h2 {
  margin: 0 0 14px;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
}

.card-cta {
  text-align: center;
}

.card-cta p {
  margin: 0 0 16px;
  color: var(--muted);
}

.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.compare th,
.compare td {
  text-align: left;
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.compare th {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.compare tr:last-child td {
  border-bottom: none;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.feature {
  padding: 15px 17px;
  border-radius: 12px;
  background: #f8f9fd;
  border: 1px solid var(--border);
}

.feature strong {
  display: block;
  margin-bottom: 5px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.94rem;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 113, 227, 0.28);
}

.btn-primary:hover {
  background: var(--accent-hover);
  text-decoration: none;
  color: #fff;
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  text-decoration: none;
}

.site-footer {
  padding: 28px 0 48px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.88rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0 0 8px;
}

.prose h1 {
  margin-top: 0;
}

.prose h2 {
  margin-top: 1.5em;
}

.prose h3 {
  margin-top: 1.2em;
}

kbd {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.82em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #f0f2f8;
  border: 1px solid var(--border);
}

@media (max-width: 860px) {
  .site-header__bar {
    grid-template-columns: auto auto;
    grid-template-rows: auto auto;
  }

  .site-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    order: 3;
  }

  .lang-switch {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  .hero__mosaic {
    height: min(480px, 52vh);
  }

  .glass-panel--main {
    width: 78%;
    top: 4%;
  }

  .glass-panel--memo {
    width: 52%;
    right: -6%;
    bottom: 0;
  }

  .glass-panel--tags {
    width: 50%;
    left: -8%;
    top: 28%;
  }
}

@media (max-width: 560px) {
  :root {
    --layout-pad: 18px;
  }

  .hero {
    padding-bottom: 40px;
  }

  .hero__mosaic {
    height: 400px;
  }

  .glass-panel--memo,
  .glass-panel--tags {
    opacity: 0.92;
  }
}