:root {
  --bg: #f6f2eb;
  --bg-alt: #fffdf8;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --ink: #151821;
  --muted: #5e6680;
  --outline: rgba(21, 24, 33, 0.08);
  --accent: #22a7b8;
  --accent-soft: #def8fb;
  --accent-deep: #0a7383;
  --accent-ink: #151821;
  --shadow: 0 30px 80px rgba(30, 38, 61, 0.14);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max-width: 1180px;
  color-scheme: light;
  font-family: "Onest", "Noto Sans JP", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100svh;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 10%, rgba(255, 255, 255, 0.95) 0, rgba(255, 255, 255, 0) 34%),
    linear-gradient(180deg, #f8f4ee 0%, #f5f1ea 42%, #eef7f7 100%);
  line-height: 1.55;
  overflow-x: hidden;
}

body[data-locale="ja"] {
  font-feature-settings: "palt" 1;
}

a {
  color: inherit;
}

button,
select,
input {
  font: inherit;
}

.ambient {
  position: fixed;
  inset: auto;
  border-radius: 999px;
  filter: blur(26px);
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
  animation: drift 16s ease-in-out infinite;
}

.ambient-a {
  width: 18rem;
  height: 18rem;
  top: -4rem;
  right: -3rem;
  background: linear-gradient(135deg, rgba(56, 214, 186, 0.6), rgba(255, 115, 150, 0.42));
}

.ambient-b {
  width: 15rem;
  height: 15rem;
  left: -4rem;
  top: 18rem;
  background: linear-gradient(135deg, rgba(255, 204, 107, 0.46), rgba(69, 189, 255, 0.34));
  animation-delay: -4s;
}

.ambient-c {
  width: 20rem;
  height: 20rem;
  right: 8%;
  bottom: -7rem;
  background: linear-gradient(135deg, rgba(255, 154, 194, 0.4), rgba(146, 234, 227, 0.42));
  animation-delay: -8s;
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.1rem 0 2.5rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 1rem;
  background: linear-gradient(145deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: white;
  box-shadow: 0 18px 36px rgba(34, 167, 184, 0.25);
  font-family: "Onest", "Noto Sans JP", sans-serif;
  font-size: 1.02rem;
  font-weight: 800;
}

.brand-text {
  font-family: "Onest", "Noto Sans JP", sans-serif;
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  letter-spacing: -0.02em;
  font-weight: 800;
}

.locale-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem;
  border: 1px solid rgba(21, 24, 33, 0.06);
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(18px);
  border-radius: 999px;
}

.locale-switch a {
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.locale-switch a:hover,
.locale-switch a:focus-visible {
  color: var(--ink);
  transform: translateY(-1px);
}

.locale-switch .is-active {
  background: var(--ink);
  color: white;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(22rem, 0.85fr);
  gap: 1.25rem;
  align-items: stretch;
}

.panel {
  position: relative;
  padding: clamp(1.15rem, 2vw, 1.8rem);
  border: 1px solid var(--outline);
  background: var(--surface);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.hero-copy h1,
.story-card h2,
.seo-copy h2,
.cta-panel h2,
.result-name {
  margin: 0;
  font-family: "Onest", "Noto Sans JP", sans-serif;
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.hero-copy h1 {
  font-size: clamp(2.1rem, 5vw, 4rem);
  max-width: 12ch;
  font-weight: 800;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--accent-deep);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.lead {
  margin: 1rem 0 0;
  max-width: 58ch;
  color: #2a3147;
  font-size: clamp(1rem, 1.7vw, 1.1rem);
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 2.35rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(21, 24, 33, 0.06);
  color: #31384d;
}

.picker-form {
  display: grid;
  gap: 1rem;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.mode-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.mode-chip {
  min-height: 2.9rem;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(21, 24, 33, 0.08);
  background: rgba(255, 255, 255, 0.8);
  color: #273046;
  font-weight: 800;
}

.mode-chip.is-active {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: white;
  box-shadow: 0 16px 32px rgba(34, 167, 184, 0.18);
}

.duo-fields {
  display: grid;
  gap: 0.9rem;
  padding: 0.95rem;
  border-radius: 1.4rem;
  border: 1px solid rgba(21, 24, 33, 0.06);
  background: rgba(255, 255, 255, 0.55);
}

.duo-helper {
  margin: 0;
  color: #44506a;
  font-size: 0.94rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field span {
  font-size: 0.92rem;
  font-weight: 700;
  color: #2b3245;
}

.field select {
  width: 100%;
  min-height: 3.4rem;
  padding: 0 1rem;
  border-radius: 1.1rem;
  border: 1px solid rgba(21, 24, 33, 0.08);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--accent-deep) 50%),
    linear-gradient(135deg, var(--accent-deep) 50%, transparent 50%);
  background-position:
    calc(100% - 22px) calc(1.55rem),
    calc(100% - 16px) calc(1.55rem);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.text-input {
  width: 100%;
  min-height: 3.4rem;
  padding: 0 1rem;
  border-radius: 1.1rem;
  border: 1px solid rgba(21, 24, 33, 0.08);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
}

.primary-button,
.secondary-button {
  min-height: 3.5rem;
  border-radius: 1.2rem;
  border: 0;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease, background-color 160ms ease;
}

.primary-button:hover,
.primary-button:focus-visible,
.secondary-button:hover,
.secondary-button:focus-visible,
.metric-chip:hover,
.metric-chip:focus-visible {
  transform: translateY(-1px);
}

.primary-button {
  padding: 0 1.1rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: white;
  font-weight: 800;
  box-shadow: 0 22px 40px rgba(34, 167, 184, 0.22);
}

.helper-text,
.share-hint,
.footer,
.faq-item p,
.story-card p,
.seo-copy p,
.cta-panel p,
.result-meaning {
  color: var(--muted);
}

.helper-text {
  margin: 0;
  font-size: 0.94rem;
}

.result-panel {
  margin-top: 1.25rem;
  background:
    radial-gradient(circle at 15% 15%, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0) 28%),
    linear-gradient(140deg, var(--accent-soft) 0%, rgba(255, 255, 255, 0.92) 52%, rgba(255, 255, 255, 0.98) 100%);
}

.result-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 1.2rem;
  align-items: center;
}

.swatch-stage {
  position: relative;
  min-height: 100%;
  padding: 0.55rem;
}

.result-swatch {
  position: relative;
  min-height: 24rem;
  border-radius: calc(var(--radius-xl) - 6px);
  background: linear-gradient(145deg, var(--accent-soft), var(--accent), var(--accent-deep));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.34),
    0 26px 60px rgba(20, 29, 49, 0.18);
  overflow: hidden;
}

.result-swatch::before,
.result-swatch::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  opacity: 0.75;
}

.result-swatch::before {
  width: 52%;
  aspect-ratio: 1;
  top: 7%;
  left: -7%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.7) 0, rgba(255, 255, 255, 0) 68%);
}

.result-swatch::after {
  width: 64%;
  aspect-ratio: 1;
  right: -10%;
  bottom: -7%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.34) 0, rgba(255, 255, 255, 0) 68%);
}

.swatch-chip {
  position: absolute;
  left: 1.3rem;
  bottom: 1.3rem;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  color: white;
  background: rgba(8, 14, 24, 0.18);
  backdrop-filter: blur(14px);
  font-size: 0.88rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.result-copy {
  display: grid;
  gap: 1rem;
}

.result-date {
  margin: 0;
  color: #39405a;
  font-weight: 700;
}

.result-name {
  font-size: clamp(1.7rem, 3.4vw, 3rem);
}

.result-meaning {
  margin: 0;
  font-size: 1rem;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.metric-chip {
  display: grid;
  gap: 0.2rem;
  align-content: start;
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 1.2rem;
  border: 1px solid rgba(21, 24, 33, 0.07);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.metric-label {
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mini-title {
  margin: 0 0 0.65rem;
  font-size: 0.95rem;
  color: #252c3f;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.pill-row .pill {
  padding: 0.58rem 0.9rem;
  background: rgba(255, 255, 255, 0.8);
}

.usage-row .pill {
  background: rgba(255, 255, 255, 0.92);
}

.duo-summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.95rem;
  align-items: center;
  padding: 0.95rem 1rem;
  border-radius: 1.4rem;
  border: 1px solid rgba(21, 24, 33, 0.06);
  background: rgba(255, 255, 255, 0.64);
}

.duo-mini-swatches {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.mini-swatch {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.55);
}

.mini-swatch.is-mixed {
  width: 2.35rem;
  height: 2.35rem;
}

.duo-summary-title,
.duo-summary-text {
  margin: 0;
}

.duo-summary-title {
  font-weight: 800;
  color: #232b3e;
}

.duo-summary-text {
  color: var(--muted);
  font-size: 0.93rem;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.7rem;
}

.secondary-button {
  padding: 0.85rem 0.9rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(21, 24, 33, 0.08);
  color: #273046;
  font-weight: 700;
}

.secondary-button:hover,
.secondary-button:focus-visible {
  background: white;
  box-shadow: 0 16px 35px rgba(20, 29, 49, 0.08);
}

.share-hint {
  margin: 0;
  font-size: 0.92rem;
}

.social-kit {
  display: grid;
  gap: 0.8rem;
  padding: 1rem;
  border-radius: 1.5rem;
  border: 1px solid rgba(21, 24, 33, 0.06);
  background: rgba(255, 255, 255, 0.66);
}

.social-kit-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.social-copy-button {
  min-height: 2.7rem;
  padding-inline: 1rem;
  width: auto;
  white-space: nowrap;
}

.tone-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tone-pill {
  min-height: 2.6rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(21, 24, 33, 0.08);
  background: rgba(255, 255, 255, 0.8);
  color: #293148;
  font-weight: 700;
}

.tone-pill.is-active {
  background: rgba(21, 24, 33, 0.92);
  color: white;
}

.caption-output {
  width: 100%;
  min-height: 8.75rem;
  resize: vertical;
  padding: 0.95rem 1rem;
  border-radius: 1.2rem;
  border: 1px solid rgba(21, 24, 33, 0.08);
  background: rgba(255, 255, 255, 0.9);
  color: #1e2638;
  font: inherit;
  line-height: 1.55;
}

.hashtags-head {
  margin-top: 0.1rem;
}

.hashtags-row .pill {
  background: rgba(255, 255, 255, 0.9);
}

.story-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.story-card h2,
.seo-copy h2,
.cta-panel h2 {
  font-size: clamp(1.24rem, 2.4vw, 2rem);
  font-weight: 800;
}

.story-card p,
.seo-copy p,
.cta-panel p,
.faq-item p {
  margin-bottom: 0;
}

.seo-copy,
.cta-panel {
  margin-top: 1.25rem;
}

.faq {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.85rem;
}

.faq-item {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  font-weight: 800;
  color: #22293b;
  padding-right: 2rem;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  color: var(--accent-deep);
  font-size: 1.35rem;
  line-height: 1;
}

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

.footer {
  padding: 1.5rem 0 0.5rem;
  text-align: center;
  font-size: 0.94rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.35rem;
  transform: translate(-50%, 140%);
  min-width: min(22rem, calc(100vw - 2rem));
  padding: 0.9rem 1.1rem;
  border-radius: 999px;
  background: rgba(18, 24, 39, 0.9);
  color: white;
  text-align: center;
  box-shadow: 0 20px 40px rgba(9, 12, 20, 0.22);
  transition: transform 220ms ease;
  z-index: 20;
}

.toast.is-visible {
  transform: translate(-50%, 0);
}

@keyframes drift {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(0, 16px, 0) scale(1.04);
  }
}

@media (max-width: 980px) {
  .hero,
  .result-layout,
  .story-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: 13ch;
  }

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

  .result-swatch {
    min-height: 21rem;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(var(--max-width), calc(100% - 1rem));
    padding-top: 0.7rem;
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .brand {
    justify-content: center;
  }

  .locale-switch {
    justify-content: center;
  }

  .panel {
    border-radius: 1.7rem;
    padding: 1rem;
  }

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

  .duo-summary {
    grid-template-columns: 1fr;
  }

  .social-kit-head {
    flex-direction: column;
    align-items: stretch;
  }

  .secondary-button,
  .primary-button,
  .field select {
    min-height: 3.2rem;
  }

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

  .result-swatch {
    min-height: 18.5rem;
  }

  .swatch-chip {
    left: 1rem;
    right: auto;
    bottom: 1rem;
  }
}