.page-products {
  --pf-gap: clamp(20px, 3.4vw, 40px);
  --pf-quiet: clamp(48px, 7vw, 96px);
}

.page-products .anchor-index {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-products .pf-link {
  color: var(--c-orange-deep);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 160ms linear;
}

.page-products .pf-link:hover {
  color: var(--c-blue);
}

/* ---------- hero ---------- */
.page-products .pf-hero {
  padding-block: clamp(22px, 3.5vw, 48px) 0;
}

.page-products .pf-hero__grid {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 60px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  margin: 12px 0 20px;
  max-width: 17ch;
}

.page-products .pf-hero .lede {
  max-width: 56ch;
  color: var(--c-gray);
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
}

.page-products .pf-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-products .pf-hero__aside {
  border-top: 2px solid var(--c-blue);
  padding-top: 14px;
}

.page-products .pf-hero__aside > p {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-gray);
  margin: 0;
}

.page-products .pf-hero__aside ol {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-products .pf-hero__aside li {
  border-bottom: var(--hair);
}

.page-products .pf-hero__aside a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  color: var(--c-ink);
  text-decoration: none;
  transition: color 160ms linear, padding-left 160ms linear;
}

.page-products .pf-hero__aside a:hover {
  color: var(--c-orange-deep);
  padding-left: 6px;
}

.page-products .pf-hero__media {
  margin: clamp(28px, 4vw, 56px) 0 0;
}

/* ---------- shared section rhythm ---------- */
.page-products .pf-section {
  padding-block: var(--pf-quiet);
}

.page-products .pf-section--mist {
  background: var(--c-mist);
}

.page-products .sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  border-top: 2px solid var(--c-blue);
  padding-top: 14px;
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-products .sec-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

.page-products .sec-title {
  font-family: var(--font-sans);
  font-size: clamp(23px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
  color: var(--c-ink);
  margin: 0;
}

.page-products .pf-intro {
  max-width: 62ch;
  color: var(--c-gray);
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 clamp(22px, 3vw, 36px);
}

.page-products .pf-note {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-gray);
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-gold);
}

.page-products .media {
  margin: 0;
}

.page-products .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--hair);
}

.page-products .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-gray);
}

/* ---------- tools ---------- */
.page-products .pf-tools {
  display: grid;
  grid-template-columns: 1fr;
  border-top: var(--hair);
  border-left: var(--hair);
  background: var(--c-snow);
}

.page-products .pf-tool {
  border-right: var(--hair);
  border-bottom: var(--hair);
  padding: clamp(20px, 3vw, 32px);
  background: var(--c-snow);
  transition: background 160ms linear;
}

.page-products .pf-tool:hover {
  background: var(--c-mist);
}

.page-products .pf-tool__num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-gold);
  margin-bottom: 10px;
}

.page-products .pf-tool h3 {
  font-size: clamp(19px, 1.8vw, 23px);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--c-ink);
  margin: 0 0 10px;
}

.page-products .pf-tool p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-ink);
  margin: 0;
}

.page-products .pf-tool__scene {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: var(--hair);
  font-size: 13px !important;
  color: var(--c-gray) !important;
  line-height: 1.7 !important;
}

/* ---------- event flow ---------- */
.page-products .pf-flow {
  list-style: none;
  margin: 0 0 clamp(24px, 3.5vw, 44px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-products .pf-flow li {
  position: relative;
}

.page-products .pf-step {
  border: var(--hair);
  background: var(--c-snow);
  padding: 14px 16px;
  transition: border-color 160ms linear;
}

.page-products .pf-step[open] {
  border-color: var(--c-blue);
}

.page-products .pf-step summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-ink);
}

.page-products .pf-step summary::-webkit-details-marker {
  display: none;
}

.page-products .pf-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--c-orange);
}

.page-products .pf-step[open] summary::after {
  content: "−";
  color: var(--c-orange-deep);
}

.page-products .pf-step__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-products .pf-step__body {
  padding-top: 12px;
  margin-top: 12px;
  border-top: var(--hair);
}

.page-products .pf-step__body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-ink);
  margin: 0;
}

.page-products .pf-step__tip {
  margin-top: 8px !important;
  color: var(--c-gray) !important;
  font-size: 13px !important;
}

.page-products .pf-events__media {
  margin-top: clamp(8px, 2vw, 20px);
}

/* ---------- clients ---------- */
.page-products .pf-clients {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-clients__body .sec-head {
  margin-top: 0;
}

.page-products .pf-client {
  border-top: var(--hair);
  padding-top: 16px;
  margin-top: 16px;
}

.page-products .pf-client h3 {
  font-size: clamp(18px, 1.7vw, 22px);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--c-blue);
  margin: 0 0 6px;
}

.page-products .pf-client__who {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-orange-deep);
  margin: 0 0 10px;
}

.page-products .pf-client p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-ink);
  margin: 0;
}

/* ---------- compat ---------- */
.page-products .pf-abbr {
  text-decoration: none;
  border-bottom: 1px dashed var(--c-orange);
  cursor: help;
  color: var(--c-orange-deep);
}

.page-products .pf-dlbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-products .pf-dl summary {
  list-style: none;
  cursor: pointer;
}

.page-products .pf-dl summary::-webkit-details-marker {
  display: none;
}

.page-products .pf-dl__list {
  margin: 12px 0 0;
  padding: 16px 18px 16px 34px;
  background: var(--c-snow);
  border: var(--hair);
  border-radius: 2px;
}

.page-products .pf-dl__list li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-ink);
  margin-bottom: 8px;
}

.page-products .pf-dl__list li:last-child {
  margin-bottom: 0;
}

.page-products .pf-compat-layout {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-filter__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-products .pf-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-products .pf-filter__tag {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-blue);
  background: var(--c-snow);
  cursor: pointer;
  transition: background 160ms linear, color 160ms linear, border-color 160ms linear;
}

.page-products .pf-filter__tag:hover {
  border-color: var(--c-orange-deep);
  color: var(--c-orange-deep);
}

.page-products #pf-os-all:checked ~ .pf-filter__bar label[for="pf-os-all"],
.page-products #pf-os-android:checked ~ .pf-filter__bar label[for="pf-os-android"],
.page-products #pf-os-ios:checked ~ .pf-filter__bar label[for="pf-os-ios"],
.page-products #pf-os-legacy:checked ~ .pf-filter__bar label[for="pf-os-legacy"] {
  background: var(--c-blue);
  border-color: var(--c-blue);
  color: var(--c-snow);
}

.page-products #pf-os-all:focus-visible ~ .pf-filter__bar label[for="pf-os-all"],
.page-products #pf-os-android:focus-visible ~ .pf-filter__bar label[for="pf-os-android"],
.page-products #pf-os-ios:focus-visible ~ .pf-filter__bar label[for="pf-os-ios"],
.page-products #pf-os-legacy:focus-visible ~ .pf-filter__bar label[for="pf-os-legacy"] {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}

.page-products #pf-os-android:checked ~ .pf-compat-wrap .is-ios,
.page-products #pf-os-android:checked ~ .pf-compat-wrap .is-legacy,
.page-products #pf-os-ios:checked ~ .pf-compat-wrap .is-android,
.page-products #pf-os-ios:checked ~ .pf-compat-wrap .is-legacy,
.page-products #pf-os-legacy:checked ~ .pf-compat-wrap .is-android,
.page-products #pf-os-legacy:checked ~ .pf-compat-wrap .is-ios {
  display: none;
}

.page-products .pf-compat-wrap {
  overflow-x: auto;
  border: var(--hair);
  background: var(--c-snow);
}

.page-products .pf-compat {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
}

.page-products .pf-compat__cap {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-gray);
}

.page-products .pf-compat th,
.page-products .pf-compat td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: var(--hair);
  vertical-align: middle;
  font-size: 14px;
}

.page-products .pf-compat thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-gray);
  background: var(--c-mist);
}

.page-products .pf-compat tbody tr:hover {
  background: var(--c-mist);
}

.page-products .pf-compat tbody tr:last-child td {
  border-bottom: 0;
}

.page-products .pf-compat td .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-blue);
}

.page-products .pf-os-tag {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-snow);
}

.page-products .pf-os-tag--ok {
  background: var(--c-blue);
}

.page-products .pf-os-tag--alt {
  background: var(--c-orange);
}

.page-products .pf-trouble {
  margin-top: 20px;
  border: var(--hair);
  border-left: 3px solid var(--c-orange);
  background: var(--c-snow);
  padding: 14px 18px;
}

.page-products .pf-trouble summary {
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-ink);
}

.page-products .pf-trouble summary::-webkit-details-marker {
  display: none;
}

.page-products .pf-trouble summary::before {
  content: "▸";
  color: var(--c-orange);
  margin-right: 8px;
}

.page-products .pf-trouble[open] summary::before {
  content: "▾";
}

.page-products .pf-trouble__list {
  margin: 12px 0 0;
  padding-left: 22px;
}

.page-products .pf-trouble__list li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.page-products .pf-compat__media .pf-note {
  margin-top: 16px;
}

/* ---------- legacy ---------- */
.page-products .pf-legacy__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-products .pf-legacy__grid {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-legacy__check h3 {
  font-size: clamp(18px, 1.7vw, 22px);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--c-ink);
  margin: 0 0 14px;
}

.page-products .pf-legacy__check ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .pf-legacy__check li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  margin-bottom: 12px;
}

.page-products .pf-legacy__check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--c-gold);
}

/* ---------- api ---------- */
.page-products .pf-api {
  display: grid;
  gap: var(--pf-gap);
}

.page-products .pf-api__body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
  margin: 0;
}

.page-products .pf-api__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--c-blue);
}

.page-products .pf-api__steps li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: var(--hair);
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-ink);
}

.page-products .pf-api__steps .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

/* ---------- cta ---------- */
.page-products .pf-cta {
  padding-block: clamp(40px, 6vw, 76px);
}

.page-products .pf-cta__inner {
  display: grid;
  gap: var(--pf-gap);
  align-items: end;
}

.page-products .pf-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--c-snow);
  margin: 0 0 14px;
}

.page-products .pf-cta p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
  margin: 0;
  max-width: 56ch;
}

.page-products .pf-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- responsive ---------- */
@media (min-width: 640px) {
  .page-products .pf-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-products .pf-hero__grid {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: end;
  }

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

  .page-products .pf-tool:nth-child(2),
  .page-products .pf-tool:nth-child(4) {
    margin-top: 32px;
  }

  .page-products .pf-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
  }

  .page-products .pf-flow li::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--c-blue);
  }

  .page-products .pf-flow li::after {
    content: "";
    position: absolute;
    top: -5px;
    right: -1px;
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 8px solid var(--c-blue);
  }

  .page-products .pf-flow li:last-child::after {
    display: none;
  }

  .page-products .pf-step {
    padding: 18px 16px;
    height: 100%;
  }

  .page-products .pf-step summary {
    flex-wrap: wrap;
    align-items: baseline;
  }

  .page-products .pf-step summary::after {
    margin-left: 0;
  }

  .page-products .pf-clients {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .pf-compat-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .pf-legacy__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .pf-api {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .pf-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1100px) {
  .page-products .pf-hero h1 {
    max-width: 16ch;
  }

  .page-products .pf-clients {
    gap: clamp(32px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pf-link,
  .page-products .pf-hero__aside a,
  .page-products .pf-tool,
  .page-products .pf-step,
  .page-products .pf-filter__tag {
    transition: none;
  }
}