/* StashNote LP - shared design system (ja / en) */

:root {
  color-scheme: light dark;
  --bg: #f5f7fb;
  --bg-soft: #eef1f8;
  --text: #111827;
  --sub: #5b6472;
  --card: rgba(255, 255, 255, .74);
  --card-solid: #ffffff;
  --line: rgba(17, 24, 39, .09);
  --blue: #2478ff;
  --purple: #7b61ff;
  --shadow: 0 24px 64px rgba(31, 72, 140, .14);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --maxw: 1160px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; margin: 0; padding: 0; }

.wrap {
  width: min(var(--maxw), calc(100% - 40px));
  margin: 0 auto;
}

/* Skip link for keyboard/screen reader users */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--blue);
  color: #fff;
  padding: 12px 18px;
  border-radius: 0 0 10px 0;
  z-index: 100;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

/* ---------- Header ---------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(245, 247, 251, .78);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
}

.nav {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.02em;
  flex-shrink: 0;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(36, 120, 255, .28);
}

.nav-links {
  display: flex;
  gap: 22px;
  color: var(--sub);
  font-size: 14px;
  font-weight: 600;
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-switch {
  display: flex;
  gap: 4px;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  background: var(--card);
  flex-shrink: 0;
  white-space: nowrap;
}

.lang-switch a {
  padding: 5px 11px;
  border-radius: 999px;
  color: var(--sub);
  white-space: nowrap;
}

.lang-switch a[aria-current="true"] {
  background: var(--text);
  color: var(--bg);
}

/* ---------- Buttons ---------- */
.btn {
  min-height: 48px;
  padding: 0 22px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -.01em;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
}

.btn.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 14px 30px rgba(36, 120, 255, .30);
}

.btn.secondary {
  background: var(--card);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: var(--text);
}

.btn.small {
  min-height: 38px;
  padding: 0 16px;
  font-size: 13px;
  border-radius: 11px;
}

.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ---------- Hero ---------- */
.hero {
  padding: 56px 0 64px;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--sub);
  font-size: 13px;
  font-weight: 600;
}

h1 {
  margin: 20px 0 18px;
  font-size: clamp(36px, 5.4vw, 60px);
  line-height: 1.12;
  letter-spacing: -.04em;
  font-weight: 800;
}

.lead {
  margin: 0 0 28px;
  max-width: 560px;
  color: var(--sub);
  font-size: clamp(16px, 1.8vw, 19px);
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.hero-secondary {
  display: inline-flex;
  margin-top: 14px;
}

.hero-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--sub);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
}

.iphone-frame {
  width: 270px;
  border-radius: 44px;
  padding: 12px;
  background: #111827;
  box-shadow: var(--shadow);
}

.iphone-frame img {
  border-radius: 32px;
  width: 100%;
  height: auto;
}

/* ---------- Sections ---------- */
section { padding: 76px 0; }
section.tight { padding: 56px 0; }

.section-head {
  max-width: 720px;
  margin: 0 auto 40px;
  text-align: center;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.18;
  letter-spacing: -.03em;
  font-weight: 800;
}

.section-head p, .section-lead {
  margin: 0;
  color: var(--sub);
  font-size: 17px;
}

.eyebrow {
  display: block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}

/* Problem cards */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.problem-card {
  padding: 26px;
  border-radius: var(--radius-md);
  background: var(--card);
  border: 1px solid var(--line);
}

.problem-card .mark {
  font-size: 22px;
  margin-bottom: 10px;
}

.problem-card p {
  margin: 0;
  font-size: 15.5px;
  color: var(--text);
  font-weight: 600;
}

/* Solution */
.solution {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
}

.solution .shot-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  max-width: 320px;
  margin: 0 0 0 auto;
}

.solution .shot-card img { width: 100%; height: auto; }

/* Feature rows */
.feature-rows {
  display: grid;
  gap: 64px;
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
}

.feature-row.reverse .feature-copy { order: 2; }
.feature-row.reverse .feature-shot { order: 1; }

.feature-num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 14px;
}

.feature-copy h3 {
  margin: 0 0 10px;
  font-size: clamp(21px, 2.4vw, 28px);
  letter-spacing: -.02em;
}

.feature-copy p {
  margin: 0;
  color: var(--sub);
  font-size: 16px;
}

.feature-aside {
  margin-top: 10px !important;
  font-size: 14px !important;
}

.feature-aside a { text-decoration: underline; }

.feature-shot {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  max-width: 300px;
  margin: 0 auto;
}

.feature-row.reverse .feature-shot { margin-left: auto; margin-right: 0; }
.feature-row:not(.reverse) .feature-shot { margin-left: 0; margin-right: auto; }

.feature-shot img { width: 100%; height: auto; }

/* Small benefit cards under features */
.mini-cards {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.mini-card {
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--card);
  border: 1px solid var(--line);
}

.mini-card .mark { font-size: 22px; margin-bottom: 10px; }
.mini-card h4 { margin: 0 0 6px; font-size: 16px; letter-spacing: -.01em; }
.mini-card p { margin: 0; font-size: 14px; color: var(--sub); }

/* Cross platform */
.device-row {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.device-item { text-align: center; }

.device-item .label {
  margin-top: 12px;
  font-weight: 700;
  color: var(--sub);
  font-size: 14px;
}

.ipad-frame, .mac-frame {
  border-radius: 22px;
  padding: 9px;
  background: #111827;
  box-shadow: var(--shadow);
}

.ipad-frame { width: 300px; }
.mac-frame { width: 380px; }

.ipad-frame img, .mac-frame img { border-radius: 14px; width: 100%; height: auto; }

.device-item .iphone-frame { width: 200px; }

.sync-note {
  max-width: 640px;
  margin: 28px auto 0;
  text-align: center;
  font-size: 14px;
  color: var(--sub);
}

/* Use cases */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.usecase-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background:
    linear-gradient(135deg, rgba(36, 120, 255, .10), rgba(123, 97, 255, .08)),
    var(--card);
  border: 1px solid var(--line);
}

.usecase-card .mark { font-size: 22px; margin-bottom: 12px; }
.usecase-card p { margin: 0; font-size: 15px; font-weight: 600; }

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: stretch;
}

.price-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--card);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}

.price-card.pro {
  background:
    linear-gradient(135deg, rgba(36, 120, 255, .14), rgba(123, 97, 255, .16)),
    var(--card);
  box-shadow: var(--shadow);
}

.price-card h3 {
  margin: 0 0 4px;
  font-size: 22px;
  letter-spacing: -.02em;
}

.price-card .price-tag {
  margin: 0 0 18px;
  color: var(--sub);
  font-size: 14px;
}

.price-card ul {
  display: grid;
  gap: 11px;
  margin-bottom: 20px;
}

.price-card li {
  font-size: 15px;
  padding-left: 26px;
  position: relative;
}

.price-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 900;
}

.price-fine {
  margin-top: auto;
  padding-top: 14px;
  font-size: 12.5px;
  color: var(--sub);
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--card);
  padding: 4px 22px;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 28px 18px 0;
  font-weight: 700;
  font-size: 16px;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 16px;
  font-size: 22px;
  color: var(--sub);
  font-weight: 400;
}

.faq-item[open] summary::after { content: "−"; }

.faq-item p {
  margin: 0 0 20px;
  color: var(--sub);
  font-size: 15px;
}

/* Final CTA */
.final-cta {
  text-align: center;
  padding: 64px 40px;
  border-radius: 36px;
  background:
    linear-gradient(135deg, rgba(36, 120, 255, .90), rgba(123, 97, 255, .90));
  color: #fff;
}

.final-cta h2 { color: #fff; }
.final-cta p { color: rgba(255, 255, 255, .86); margin-bottom: 26px; }
.final-cta .buttons { justify-content: center; }
.final-cta .btn.primary {
  background: #fff;
  color: #111827;
  box-shadow: 0 14px 30px rgba(0, 0, 0, .22);
}
.final-cta .btn.secondary {
  background: rgba(255, 255, 255, .14);
  border-color: rgba(255, 255, 255, .32);
  color: #fff;
}

/* Footer */
footer.site-footer {
  padding: 40px 0 52px;
  border-top: 1px solid var(--line);
  color: var(--sub);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
}

.footer-brand img { width: 26px; height: 26px; border-radius: 7px; }

/* ---------- Sticky mobile CTA ---------- */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: rgba(245, 247, 251, .92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-top: 1px solid var(--line);
  display: none;
  gap: 10px;
}

.sticky-cta .btn { flex: 1; padding: 0 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 36px;
  }
  .lead { margin-left: auto; margin-right: auto; }
  .buttons { justify-content: center; }
  .hero-visual { order: -1; margin-bottom: 8px; }
  .iphone-frame { width: 230px; }

  .problem-grid, .mini-cards { grid-template-columns: 1fr; }
  .usecase-grid { grid-template-columns: 1fr 1fr; }
  .solution { grid-template-columns: 1fr; text-align: center; }
  .solution .lead { margin-left: auto; margin-right: auto; }

  .feature-row, .feature-row.reverse {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .feature-row .feature-copy, .feature-row.reverse .feature-copy { order: 2; }
  .feature-row .feature-shot, .feature-row.reverse .feature-shot { order: 1; }
  .feature-shot { max-width: 320px; margin: 0 auto; }

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

  .nav-links { display: none; }

  body { padding-bottom: 64px; }
  .sticky-cta { display: flex; }
}

@media (max-width: 640px) {
  .usecase-grid { grid-template-columns: 1fr 1fr; }
  .final-cta { padding: 48px 24px; border-radius: 26px; }
}

@media (max-width: 480px) {
  .wrap { width: min(100% - 28px, var(--maxw)); }
  h1 { letter-spacing: -.03em; }
  .device-row { flex-direction: column; align-items: center; }
  .ipad-frame, .mac-frame { width: min(92vw, 340px); }
  .faq-item { padding: 4px 16px; }

  .nav { height: auto; padding: 10px 0; flex-wrap: wrap; row-gap: 8px; }
  .brand { font-size: 16px; }
  .brand img { width: 30px; height: 30px; }
  .lang-switch { display: none; }
  .nav-right { gap: 0; margin-left: auto; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #07080b;
    --bg-soft: #0d0f14;
    --text: #f5f7fa;
    --sub: #a4acba;
    --card: rgba(26, 30, 38, .68);
    --line: rgba(255, 255, 255, .09);
    --shadow: 0 24px 64px rgba(0, 0, 0, .5);
  }
  header.site-header { background: rgba(7, 8, 11, .78); }
  .sticky-cta { background: rgba(7, 8, 11, .92); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* Subtle reveal animation (respects reduced motion above) */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}