/* Reusable UI pieces shared across the LP and content pages. */

/* ---------- Buttons ---------- */

.at-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--at-space-2);
  min-height: 40px;
  padding: 0 30px;
  border: 1px solid transparent;
  border-radius: var(--at-radius);
  font-size: var(--at-text-base);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  text-align: center;
  transition: background-color var(--at-transition), color var(--at-transition),
    border-color var(--at-transition), box-shadow var(--at-transition);
}

.at-button--primary {
  background-color: var(--at-color-primary);
  border-color: var(--at-color-primary);
  color: var(--at-color-fg-inverse);
  box-shadow: var(--at-shadow-cta);
}

.at-button--primary:hover {
  background-color: var(--at-color-primary-hover);
  color: var(--at-color-fg-inverse);
}

.at-button--outline {
  border-color: var(--at-color-line-strong);
  background-color: var(--at-color-bg);
  color: var(--at-color-fg-strong);
}

.at-button--outline:hover {
  border-color: var(--at-color-primary);
  color: var(--at-color-primary);
}

.at-button--accent {
  min-height: 0;
  padding: var(--at-space-3) var(--at-space-6);
  border-radius: var(--at-radius-pill);
  background-color: var(--at-color-accent);
  border-color: var(--at-color-accent);
  color: var(--at-color-fg-inverse);
  font-size: var(--at-text-sm);
  letter-spacing: 0.06em;
}

.at-button--accent:hover {
  background-color: var(--at-color-accent-hover);
  border-color: var(--at-color-accent-hover);
  color: var(--at-color-fg-inverse);
}

.at-button--gray {
  border-radius: var(--at-radius-pill);
  border-color: var(--at-color-neutral);
  background-color: var(--at-color-neutral);
  color: var(--at-color-fg-inverse);
  box-shadow: none;
}

.at-button--gray:hover {
  border-color: var(--at-color-neutral-hover);
  background-color: var(--at-color-neutral-hover);
  color: var(--at-color-fg-inverse);
}

.at-button--sm {
  font-size: var(--at-text-sm);
}

.at-button-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--at-space-3);
}

.at-button-group--center {
  justify-content: center;
}

@media (max-width: 600px) {
  .at-button-group {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- Text link ---------- */

.at-textlink {
  display: inline-flex;
  align-items: center;
  gap: var(--at-space-2);
  color: var(--at-color-primary);
  font-weight: 700;
}

.at-textlink::before {
  content: "＞";
  font-size: 0.85em;
}

.at-textlink--plain {
  color: var(--at-color-fg);
}

.at-textlink--plain::before {
  content: none;
}

/* ---------- Scroll reveal ---------- */

.at-reveal {
  opacity: 0;
  transition: opacity 700ms ease, transform 700ms ease;
}

.at-reveal--from-left {
  transform: translateX(-56px);
}

.at-reveal--from-right {
  transform: translateX(56px);
}

.at-reveal.is-in {
  opacity: 1;
  transform: translateX(0);
}

@media (prefers-reduced-motion: reduce) {
  .at-reveal,
  .at-reveal--from-left,
  .at-reveal--from-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- Heading gradient (articul.jp text-clip) ---------- */

.at-text-gradient {
  width: fit-content;
  max-width: 100%;
  background-image: var(--at-gradient-heading);
  background-clip: text;
  color: #ae684a;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Section heading ---------- */

.at-heading {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-4);
}

.at-heading--center {
  align-items: center;
  text-align: center;
}

.at-heading__eyebrow {
  color: var(--at-color-accent);
  font-size: var(--at-text-xs);
  font-weight: 700;
  letter-spacing: var(--at-tracking-wider);
  text-transform: uppercase;
}

.at-heading__title {
  font-size: var(--at-text-4xl);
}

.at-heading--center .at-heading__title {
  margin-inline: auto;
}

.at-heading__title--sm {
  font-size: var(--at-text-2xl);
}

.at-heading__lead {
  max-width: 46em;
  color: var(--at-color-fg-muted);
  font-size: var(--at-text-body);
}

/* ---------- Notes ---------- */

.at-notes {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-2);
  color: var(--at-color-fg-faint);
  font-size: var(--at-text-xs);
  line-height: var(--at-leading-normal);
}

/* ---------- Media frame ---------- */

.at-figure {
  margin: 0;
  border-radius: var(--at-radius-lg);
  overflow: hidden;
}

.at-figure--bordered {
  border: 1px solid var(--at-color-line);
  background-color: var(--at-color-bg);
}

.at-figure img {
  width: 100%;
}

/* ---------- Page hero (content pages) ---------- */

.at-page-hero {
  padding-block: var(--at-section-y);
  background-color: var(--at-color-bg-subtle);
  text-align: center;
}

.at-page-hero--plain {
  background-color: var(--at-color-bg);
}

.at-page-hero__eyebrow {
  color: var(--at-color-accent);
  font-size: var(--at-text-xs);
  font-weight: 700;
  letter-spacing: var(--at-tracking-wider);
}

.at-page-hero__eyebrow--lg {
  font-size: var(--at-text-xl);
  font-weight: 800;
  letter-spacing: 0.03em;
}

.at-page-hero__title {
  margin-top: var(--at-space-3);
  font-size: var(--at-text-4xl);
}

.at-page-hero__title--mark {
  position: relative;
  display: inline-block;
  padding-bottom: 25px;
  font-size: var(--at-text-3xl);
}

.at-page-hero__title--mark::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 50px;
  height: 5px;
  border-radius: 5px;
  background-color: var(--at-color-accent);
  transform: translateX(-50%);
}

.at-page-hero__lead {
  max-width: 44em;
  margin: var(--at-space-5) auto 0;
  color: var(--at-color-fg-muted);
}

/* ---------- Split media/text row ---------- */

.at-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(var(--at-space-6), 5vw, var(--at-space-10));
  overflow-x: clip;
}

.at-split__body {
  display: flex;
  flex-direction: column;
  gap: var(--at-space-4);
}

.at-split__label {
  color: var(--at-color-fg-muted);
  font-size: var(--at-text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.at-split__label--lg {
  font-size: var(--at-text-2xl);
}

.at-split__label img {
  width: auto;
  max-height: 24px;
}

@media (max-width: 600px) {
  .at-split {
    grid-template-columns: 1fr;
  }

  .at-split--media-first-stack .at-split__media {
    order: -1;
  }
}

/* ---------- Prose (legal and article bodies) ---------- */

.at-prose {
  color: var(--at-color-fg);
  font-size: var(--at-text-md);
  line-height: var(--at-leading-relaxed);
}

.at-prose > * + * {
  margin-top: var(--at-space-5);
}

.at-prose h2 {
  margin-top: var(--at-space-9);
  padding-bottom: var(--at-space-3);
  border-bottom: 1px solid var(--at-color-line);
  font-size: var(--at-text-xl);
}

.at-prose h3 {
  margin-top: var(--at-space-7);
  font-size: var(--at-text-lg);
}

.at-prose h4 {
  margin-top: var(--at-space-6);
  font-size: var(--at-text-md);
}

.at-prose ol,
.at-prose ul {
  padding-left: 1.6em;
}

.at-prose ol > li {
  list-style: decimal;
}

.at-prose ul > li {
  list-style: disc;
}

.at-prose li {
  margin-top: var(--at-space-2);
}

.at-prose li > ol {
  margin-top: var(--at-space-2);
  padding-left: 1.4em;
}

.at-prose li > ol > li {
  list-style: decimal;
}

.at-prose a {
  color: var(--at-color-primary);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.at-prose img {
  border-radius: var(--at-radius);
}

.at-prose blockquote {
  margin: 0;
  padding: var(--at-space-4) var(--at-space-6);
  border-left: 3px solid var(--at-color-accent);
  background-color: var(--at-color-bg-subtle);
  color: var(--at-color-fg-muted);
}

/* ---------- Closing CTA (shared by TOP and content pages) ---------- */

.at-closing {
  overflow-x: clip;
  padding-block: var(--at-section-y-loose) var(--at-section-y);
  background-color: var(--at-color-bg-cream);
  text-align: center;
}

.at-closing__stage {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.at-closing--with-art .at-closing__stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 22rem) minmax(0, 1fr);
  align-items: center;
  column-gap: var(--at-space-4);
}

.at-closing__main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--at-space-7);
}

.at-closing__title {
  font-size: var(--at-text-lg);
  font-weight: 700;
  line-height: var(--at-leading-tight);
}

.at-closing__url {
  width: min(380px, 88%);
}

.at-closing__url img {
  display: block;
  width: 100%;
  height: auto;
}

.at-closing__side img {
  display: block;
  width: 100%;
  max-width: 367px;
  height: auto;
  margin-inline: auto;
}

.at-closing__lead {
  margin-top: var(--at-space-5);
  margin-inline: auto;
  padding-inline: var(--at-gutter);
  font-size: var(--at-text-4xl);
  font-weight: 700;
  line-height: var(--at-leading-tight);
}

@media (min-width: 960px) {
  .at-closing__side--left {
    transform: translateX(clamp(-80px, -10vw, -144px));
  }

  .at-closing__side--right {
    transform: translateX(clamp(80px, 10vw, 144px));
  }

  .at-closing--with-art .at-closing__lead {
    margin-top: var(--at-space-3);
  }
}

@media (max-width: 959px) {
  .at-closing--with-art .at-closing__stage {
    display: flex;
  }

  .at-closing__side {
    display: none;
  }
}

@media (max-width: 600px) {
  .at-heading--center {
    align-items: flex-start;
    text-align: left;
  }

  .at-heading--center .at-heading__title,
  .at-heading--center .at-heading__lead {
    margin-inline: 0;
  }

  .at-button-group--center {
    justify-content: flex-start;
  }

  .at-closing .at-button-group--center {
    justify-content: center;
  }
}