/* =========================================================
   MOTORHOME PAYLOAD CHECKER
   Page-specific additions for the article template.
   Loaded after motorhome-guides.css.
   ========================================================= */


/* =========================================================
   BASE CHECKER
   ========================================================= */

.payload-checker-shell {
  margin-top: 1.5rem;
  overflow: hidden;
  background: rgba(255,255,255,.86);
  border: 1px solid rgba(12,105,128,.14);
  box-shadow: var(--shadow);
}

.payload-form {
  padding:
    1rem
    clamp(1.1rem,3vw,2rem)
    clamp(1.5rem,3vw,2rem);
}

.payload-question {
  min-width: 0;
  margin: 0;
  padding: clamp(1.4rem,3vw,2rem) 0;
  border: 0;
  border-bottom: 1px solid rgba(63,71,80,.12);
}

.payload-question legend {
  width: 100%;
  margin: 0 0 .7rem;
  padding: 0;
  color: #20262d;
  font-family: var(--nav-font);
  font-size: clamp(1.15rem,2vw,1.5rem);
  font-weight: 700;
  line-height: 1.2;
}

.payload-question legend > span {
  display: inline-block;
  margin-right: .55rem;
  color: #0c6980;
  font-size: .78em;
}

.article-content .payload-help {
  margin: 0 0 1rem;
  color: #6f7f8f;
  font-size: .95rem;
  line-height: 1.55;
}

.payload-weight-field {
  max-width: 360px;
}

.payload-weight-field > label,
.payload-select-grid label {
  display: block;
  margin-bottom: .45rem;
  color: #3f4750;
  font-family: var(--nav-font);
  font-size: .9rem;
  font-weight: 600;
}


/* =========================================================
   INPUTS
   ========================================================= */

.payload-input-with-unit {
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  border: 1px solid rgba(12,105,128,.25);
  background: #fff;
}

.payload-input-with-unit:focus-within {
  border-color: #0c6980;
  box-shadow: 0 0 0 4px rgba(92,225,230,.16);
}

.payload-input-with-unit input {
  min-width: 0;
  min-height: 58px;
  padding: .85rem 1rem;
  border: 0;
  background: transparent;
  color: #20262d;
  font: inherit;
  font-size: 1.05rem;
  outline: 0;
}

.payload-input-with-unit span {
  display: grid;
  place-items: center;
  min-width: 62px;
  padding: 0 1rem;
  background: rgba(12,105,128,.06);
  color: #0c6980;
  font-family: var(--nav-font);
  font-weight: 700;
}

.article-content .payload-field-error {
  min-height: 1.25em;
  margin: .5rem 0 0;
  color: #9f3434;
  font-size: .88rem;
  font-weight: 700;
  line-height: 1.4;
}


/* =========================================================
   CHOICE LAYOUT
   ========================================================= */

.payload-choice-grid {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: .8rem;
}

.payload-inline-choices {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}

.payload-choice {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: .9rem;

  min-width: 0;
  min-height: 78px;

  padding: 1rem 1.05rem;

  border: 1px solid rgba(229,233,238,.75);
  border-radius: 10px;

  background: #f8fafc;
  color: #20262d;

  cursor: pointer;

  box-shadow:
    inset 1px 1px 0 rgba(255,255,255,.95),
    -5px -5px 10px rgba(255,255,255,.96),
     6px 7px 12px rgba(43,52,62,.16);

  transform: translateY(0);

  transition:
    box-shadow .16s ease,
    transform .16s ease,
    background-color .16s ease,
    border-color .16s ease,
    color .16s ease;

  -webkit-tap-highlight-color: transparent;
}

.payload-choice input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}

.payload-choice > span {
  display: block;
  width: 100%;
  min-width: 0;
}

.payload-choice strong {
  display: block;
  color: #20262d;
  font-size: .98rem;
  font-weight: 800;
  line-height: 1.35;
  transition: color .16s ease;
}

.payload-choice small {
  display: block;
  margin-top: .3rem;
  color: #6f7f8f;
  font-size: .86rem;
  line-height: 1.45;
}

.payload-choice:hover {
  background: #f3f6f9;
  border-color: rgba(12,105,128,.22);

  box-shadow:
    inset 3px 3px 7px rgba(43,52,62,.12),
    inset -4px -4px 8px rgba(255,255,255,.96),
    1px 1px 2px rgba(43,52,62,.05);
}

.payload-choice:active {
  transform: translateY(2px);
  background: #e9eef2;

  box-shadow:
    inset 6px 6px 12px rgba(43,52,62,.20),
    inset -6px -6px 12px rgba(255,255,255,.98);
}

.payload-choice:has(input:checked) {
  transform: translateY(1px);
  background: #eef2f6;
  border-color: rgba(12,105,128,.34);

  box-shadow:
    inset 5px 5px 10px rgba(43,52,62,.18),
    inset -6px -6px 12px rgba(255,255,255,.98);
}

.payload-choice:has(input:checked) strong {
  color: #0c6980;
}

.payload-choice:has(input:focus-visible) {
  outline: 3px solid rgba(92,225,230,.38);
  outline-offset: 3px;
}

.payload-choice-small {
  min-width: 130px;
  min-height: 58px;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.payload-choice-small > span {
  width: auto;
}


/* =========================================================
   SELECTS
   ========================================================= */

.payload-select-grid {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: .9rem;
}

.payload-select-grid select {
  width: 100%;
  min-height: 56px;
  padding: .8rem 2.5rem .8rem .9rem;
  border: 1px solid rgba(12,105,128,.22);
  border-radius: 8px;
  background: #fff;
  color: #20262d;
  font: inherit;
  outline: 0;
}

.payload-select-grid select:focus {
  border-color: #0c6980;
  box-shadow: 0 0 0 4px rgba(92,225,230,.16);
}


/* =========================================================
   CHECKER ACTION BUTTONS
   Raised / indented Tip of the Day behaviour
   ========================================================= */

.payload-form-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .8rem;
  padding-top: .5rem;
}

.payload-primary-button,
.payload-reset-button {
  position: relative;

  min-height: 54px;
  padding: .85rem 1.25rem;

  border: 1px solid rgba(229,233,238,.8);
  border-radius: 9px;

  background: #f8fafc;
  color: #0c6980;

  cursor: pointer;

  font-family: var(--nav-font);
  font-weight: 800;

  box-shadow:
    inset 1px 1px 0 rgba(255,255,255,.95),
    -5px -5px 10px rgba(255,255,255,.96),
     6px 7px 12px rgba(43,52,62,.16);

  transform: translateY(0);

  transition:
    box-shadow .16s ease,
    transform .16s ease,
    background-color .16s ease,
    color .16s ease;

  -webkit-tap-highlight-color: transparent;
}

.payload-primary-button {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
}

.payload-primary-button span {
  color: #08a9c9;
}

.payload-primary-button:hover,
.payload-primary-button:focus-visible,
.payload-reset-button:hover,
.payload-reset-button:focus-visible {
  outline: 0;
  background: #f3f6f9;
  color: #058cab;

  box-shadow:
    inset 3px 3px 7px rgba(43,52,62,.15),
    inset -4px -4px 8px rgba(255,255,255,.96),
    1px 1px 2px rgba(43,52,62,.05);
}

.payload-primary-button:active,
.payload-reset-button:active {
  transform: translateY(1px);
  background: #eef2f6;
  color: #058cab;

  box-shadow:
    inset 5px 5px 10px rgba(43,52,62,.18),
    inset -6px -6px 12px rgba(255,255,255,.98);
}


/* =========================================================
   RESULT
   ========================================================= */

.payload-result {
  margin-top: 1.25rem;
  padding: clamp(1.25rem,3vw,2rem);

  border: 1px solid #e4e9ed;
  border-top: 4px solid #5ce1e6;
  border-radius: 18px;

  background: linear-gradient(145deg,#fff,#f5fafb);

  box-shadow:
    inset 7px 7px 14px rgba(52,62,73,.05),
    inset -8px -8px 16px rgba(255,255,255,.9);
}

.article-content .payload-result-label {
  margin: 0 0 .75rem;
  color: #6f7f8f;
  font-family: var(--nav-font);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  line-height: 1.2;
  text-transform: uppercase;
}

.payload-result-category {
  display: inline-grid;
  place-items: center;

  min-width: 82px;
  min-height: 82px;

  margin-bottom: 1rem;
  padding: .65rem;

  border-radius: 12px;

  background: #3f4750;
  color: #5ce1e6;

  font-family: var(--nav-font);
  font-size: 1.8rem;
  font-weight: 700;
}

.payload-result h3 {
  margin: 0 0 .75rem;
}

.article-content .payload-result-lead {
  margin-bottom: 0;
}

.payload-result-details {
  display: grid;
  gap: .65rem;
  margin-top: 1.3rem;
}

.article-content .payload-result-detail {
  margin: 0;
  padding-left: .9rem;
  border-left: 3px solid rgba(12,105,128,.38);
  color: #46535d;
  font-size: .98rem;
  line-height: 1.6;
}

.payload-result-warning {
  margin-top: 1.4rem;
  padding: 1rem 1.05rem;

  border: 1px solid rgba(63,71,80,.14);
  border-radius: 10px;

  background: #fff;
}

.payload-result-warning strong {
  font-family: var(--nav-font);
}

.article-content .payload-result-warning p {
  margin: .3rem 0 0;
  color: #4f5c66;
  font-size: .92rem;
  line-height: 1.55;
}

.payload-result-links {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem 1.4rem;
  margin-top: 1.4rem;
}


/* =========================================================
   CHECKER - TIP OF THE DAY PANEL PRESENTATION
   ========================================================= */

#checker {
  position: relative;
  isolation: isolate;
  
}

#checker::before {
  content: "";
  position: absolute;
  inset: .25rem -1rem -1rem;

  background:
    url("../images/topology-background.svg")
    center / 850px auto repeat;

  opacity: .18;

  pointer-events: none;
  z-index: -1;
}

#checker > h3 {
  margin-bottom: 1.25rem;
}

.payload-checker-shell {
  position: relative;

  margin-top: 0;

  padding: clamp(1.25rem,3vw,2rem);

  overflow: visible;

  background:
    linear-gradient(
      145deg,
      #fff,
      #f8fafc
    );

  border: 1px solid #edf0f3;
  border-radius: 14px;

  box-shadow:
    -9px -9px 20px rgba(255,255,255,.9),
    14px 18px 34px rgba(43,52,62,.16);
}

.payload-checker-icon {
  width: 56px;
  height: 56px;

  margin: 0 auto 1rem;

  color: #08a9c9;

  filter:
    drop-shadow(
      0 8px 8px rgba(8,169,201,.08)
    );
}

.payload-checker-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.payload-form {
  display: grid;
  gap: 1rem;
  padding: 0;
}

.payload-question {
  min-width: 0;

  margin: 0;

  padding:
    clamp(1.2rem,2.5vw,1.6rem);

  border: 1px solid #eef1f4;
  border-radius: 18px;

  background:
    linear-gradient(
      145deg,
      #fff,
      #f9fbfd
    );

  box-shadow:
    -6px -6px 12px rgba(255,255,255,.96),
    7px 9px 16px rgba(43,52,62,.12);
}

.payload-question legend {
  padding: 0 .25rem;
}

.payload-input-with-unit {
  border-radius: 8px;
}

.article-content .payload-powered {
  margin: 1.2rem 0 0;

  text-align: right;

  color: #939aa3;

  font-size: .8rem;
}

.article-content .payload-powered b {
  color: #2e3135;
}


/* =========================================================
   MOTORHOME LICENCE WEIGHT LIMIT CARDS
   ========================================================= */

.payload-weight-cards {
  display: grid;
  grid-template-columns:
    repeat(2,minmax(0,1fr));

  gap: 1rem;

  margin: 1.5rem 0;
}

.payload-weight-card {
  position: relative;

  min-width: 0;

  padding: 1.35rem;

  border: 1px solid #eef1f4;
  border-radius: 18px;

  background:
    linear-gradient(
      145deg,
      #ffffff,
      #f8fafc
    );

  box-shadow:
    -6px -6px 14px rgba(255,255,255,.96),
    8px 10px 22px rgba(43,52,62,.11);

  overflow: hidden;
}

.payload-weight-card::before {
  content: "";

  position: absolute;

  top: 0;
  left: 0;

  width: 5px;
  height: 100%;

  background:
    linear-gradient(
      180deg,
      #5ce1e6 0%,
      #0c6980 100%
    );
}

.payload-category {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-width: 68px;
  min-height: 58px;


  margin-bottom: 1rem;
  padding: .45rem .8rem;

  border-radius: 14px;

  background: #f7f9fb;
  color: #0c6980;

  font-family: var(--nav-font);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;

  box-shadow:
    inset 5px 5px 10px rgba(52,62,73,.08),
    inset -6px -6px 12px rgba(255,255,255,.95);
}

.payload-weight-card h4 {
  margin: 0 0 .55rem;

  color: #20262d;

  font-family: var(--nav-font);
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.3;
}

.article-content .payload-weight-card p {
  margin: 0;

  color: #46535d;

  font-size: 1rem;
  line-height: 1.6;
}


/* =========================================================
   FAQ
   ========================================================= */

.payload-faq-item {
  padding: 1.35rem 0;

  border-top:
    1px solid rgba(63,71,80,.14);
}

.payload-faq-item:last-child {
  border-bottom:
    1px solid rgba(63,71,80,.14);
}

.payload-faq-item h4 {
  margin: 0 0 .55rem;

  color: #20262d;

  font-family: var(--nav-font);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
}

.article-content .payload-faq-item p {
  margin: 0;

  color: #46535d;

  font-size: 1rem;
  line-height: 1.65;
}


/* =========================================================
   ARTICLE SECTION POSITIONING
   ========================================================= */

.article-content > section {
  scroll-margin-top: 180px;
}


/* =========================================================
   PAYLOAD PAGE HERO
   Full-bleed image + index-page text formatting
   ========================================================= */

:root {
  --payload-hero-split: max(390px,42vw);
}

.payload-hero {
  position: relative;

  padding: 0;

  overflow: hidden;
  isolation: isolate;

  background:
    radial-gradient(
      circle at 9% 6%,
      rgba(111,127,143,.10),
      transparent 24%
    ),
    radial-gradient(
      circle at 92% 8%,
      rgba(111,127,143,.08),
      transparent 22%
    ),
    linear-gradient(
      180deg,
      #2b3138 0%,
      #353c44 38%,
      #48515a 68%,
      #66717b 86%,
      #8e98a2 100%
    );

  color: #f7f8fa;

  scroll-margin-top: 88px;
}

.payload-hero::before,
.payload-hero::after {
  content: "";

  position: absolute;

  border-radius: 50%;

  pointer-events: none;

  z-index: 0;

  filter: blur(36px);

  opacity: .95;

  mix-blend-mode: screen;
}

.payload-hero::before {
  width: 520px;
  height: 520px;

  top: -120px;
  left: -80px;

  background:
    radial-gradient(
      circle,
      rgba(111,127,143,.42) 0%,
      rgba(111,127,143,.14) 38%,
      rgba(111,127,143,0) 72%
    );
}

.payload-hero::after {
  width: 460px;
  height: 460px;

  top: -40px;
  right: -120px;

  background:
    radial-gradient(
      circle,
      rgba(111,127,143,.30) 0%,
      rgba(111,127,143,.10) 36%,
      rgba(111,127,143,0) 72%
    );
}


/* Left topology section */

.payload-hero-topology {
  position: absolute;

  top: 0;
  bottom: 0;
  left: 0;

  width: var(--payload-hero-split);
  height: 100%;

  object-fit: cover;
  object-position: center;

  opacity: .28;

  mix-blend-mode: screen;

  pointer-events: none;

  z-index: 0;
}


/* Main hero container */

.payload-hero-container {
  position: relative;

  z-index: 2;

  width:
    min(
      calc(100% - 2rem),
      1240px
    );

  margin-inline: auto;
}

.payload-hero-grid {
  display: grid;

  grid-template-columns:
    minmax(0,42%)
    minmax(0,58%);

  gap: 0;

  align-items: center;

  padding:
    clamp(1.5rem,1.6vw,1.8rem)
    0;
}


/* =========================================================
   HERO COPY
   Matches index-page hero
   ========================================================= */

.payload-hero-copy {
  position: relative;

  z-index: 2;

  min-width: 0;

  margin-left:
    calc(
      -1 * (
        (100vw - min(100vw - 2rem,1240px)) / 2
      )
    );

  padding:
    clamp(1rem,2vw,1.5rem)
    clamp(2rem,3.4vw,4rem)
    clamp(1rem,2vw,1.5rem)
    clamp(4rem,7vw,6rem);

  display: flex;

  flex-direction: column;

  justify-content: center;
  align-items: flex-start;

  text-align: left;

  gap: 24px;
}

.payload-hero-text {
  display: flex;

  flex-direction: column;

  gap: 6px;
}

.payload-hero h1 {
  margin: 0;

  max-width: 9ch;

  color: #fff;

  font-size:
    clamp(2.8rem,6vw,5rem);

  line-height: .92;

  font-weight: 600;

  letter-spacing: -.04em;

  text-wrap: balance;
}

.payload-hero-copy p {
  max-width: 48ch;

  margin: 0;

  color: #fff;

  font-size: 1.25rem;

  line-height: 1.6;

  text-wrap: pretty;
}

.payload-hero-copy .payload-hero-intro {
  padding-top: 1.2rem;

  font-weight: 400;
}


/* =========================================================
   HERO CHECK LICENCE BUTTON
   Same formatting as index hero tools links
   ========================================================= */

.payload-hero .button-row {
  display: flex;

  flex-wrap: wrap;

  gap: .85rem;

  margin-bottom: 0;
}

.payload-hero .hero-tools-cta {
  position: relative;

  display: inline-flex;

  align-items: center;

  gap: .75rem;

  width: fit-content;

  padding:
    .15rem 0 .45rem;

  color: #fff;

  font-weight: 700;

  font-size:
    clamp(1rem,1.25vw,1.15rem);

  letter-spacing: -.02em;

  line-height: 1.1;
}

.payload-hero .hero-tools-label {
  position: relative;

  display: inline-block;

  padding-bottom: .35rem;
}

.payload-hero .hero-tools-label::before,
.payload-hero .hero-tools-label::after {
  content: "";

  position: absolute;

  left: 0;
  bottom: 0;

  width: 100%;
  height: 2px;

  border-radius: 999px;
}

.payload-hero .hero-tools-label::before {
  background:
    rgba(255,255,255,.9);
}

.payload-hero .hero-tools-label::after {
  background: #000;

  transform: scaleX(0);

  transform-origin:
    left center;

  transition:
    transform 280ms ease;
}

.payload-hero .hero-tools-cta:hover
.hero-tools-label::after,
.payload-hero .hero-tools-cta:focus-visible
.hero-tools-label::after {
  transform: scaleX(1);
}

.payload-hero .hero-tools-cta:focus-visible {
  outline: none;
}

.payload-hero .hero-tools-badge {
  display: inline-flex;

  align-items: center;
  justify-content: center;

  width: 54px;
  height: 34px;

  border:
    1px solid rgba(255,255,255,.18);

  border-radius: 999px;

  background:
    rgba(255,255,255,.12);

  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);

  box-shadow:
    0 10px 24px rgba(0,0,0,.12);

  transition:
    transform 220ms ease,
    background-color 220ms ease,
    border-color 220ms ease;
}

.payload-hero .hero-tools-cta:hover
.hero-tools-badge,
.payload-hero .hero-tools-cta:focus-visible
.hero-tools-badge {
  transform: translateY(-1px);

  background:
    rgba(255,255,255,.18);

  border-color:
    rgba(255,255,255,.28);
}

.payload-hero .hero-tools-badge svg {
  display: block;

  width: 24px;
  height: 24px;

  color: #fff;
}


/* =========================================================
   HERO IMAGE - FULL BLEED RIGHT SIDE
   ========================================================= */

.payload-hero-side {
  min-width: 0;
  min-height: 1px;
}

.payload-hero-side-bleed {
  position: absolute;

  top: 0;
  right: 0;
  bottom: 0;

  left:
    var(--payload-hero-split);

  margin: 0;
  padding: 0;

  overflow: hidden;

  z-index: 1;
}

.payload-hero-bleed-link,
.payload-hero-side-bleed picture,
.payload-hero-side-bleed img {
  display: block;

  width: 100%;
  height: 100%;
}

.payload-hero-bleed-link {
  position: relative;

  overflow: hidden;
}

.payload-hero-side-bleed img {
  object-fit: cover;

  object-position: center;

  transition:
    transform 220ms ease,
    filter 220ms ease;
}

.payload-hero-bleed-link:hover img,
.payload-hero-bleed-link:focus-visible img {
  transform: scale(1.01);

  filter: brightness(1.035);
}

.payload-hero-bleed-link:focus-visible {
  outline:
    3px solid rgba(255,255,255,.85);

  outline-offset: -6px;
}


/* =========================================================
   OFFICIAL SOURCES
   ========================================================= */

#sources ul {
  list-style: none;
  padding-left: 0;
}

#sources li {
  list-style: none;
}


/* =========================================================
   RESPONSIVE - 780PX
   Hero follows index page:
   text first, full-width image immediately below
   ========================================================= */

@media (max-width:780px) {

  .payload-hero {
    padding: 0;
    margin: 0;
  }

  .payload-hero-container {
    width: 100%;

    max-width: none;

    margin: 0;

    padding: 0;
  }

  .payload-hero-topology {
    display: none;
  }

  .payload-hero-grid {
    display: block;

    width: 100%;

    margin: 0;

    padding: 0;
  }

  .payload-hero-copy {
    position: relative;

    isolation: isolate;

    width: 100%;

    margin: 0;

    padding:
      clamp(3.75rem,14vw,5.25rem)
      clamp(1rem,5vw,1.5rem)
      .75rem;

    gap: 20px;
  }

  .payload-hero-copy::before {
    content: "";

    position: absolute;

    top: 0;
    bottom: 0;

    left: 50%;

    width: 100vw;

    transform:
      translateX(-50%);

    background-image:
      url("../images/topology-background.svg");

    background-size:
      700px auto;

    background-position:
      center;

    background-repeat:
      repeat;

    opacity: .28;

    mix-blend-mode: screen;

    pointer-events: none;

    z-index: -1;
  }

  .payload-hero-text {
    gap: 6px;
  }

  .payload-hero h1 {
    max-width: 9ch;
  }

  .payload-hero-copy p {
    font-size: 1.1rem;
  }

  .payload-hero .hero-tools-cta {
    gap: .65rem;

    font-size: 1rem;
  }

  .payload-hero .hero-tools-badge {
    width: 48px;
    height: 32px;
  }

  .payload-hero .hero-tools-badge svg {
    width: 22px;
    height: 22px;
  }

  .payload-hero-side {
    display: none;
  }

  .payload-hero-side-bleed {
    position: relative;

    inset: auto;

    display: block;

    width: 100vw;

    max-width: none;

    height:
      clamp(240px,62vw,440px);

    margin: 0;

    padding: 0;

    overflow: hidden;

    z-index: 1;
  }

  .payload-hero-bleed-link,
  .payload-hero-side-bleed picture,
  .payload-hero-side-bleed img {
    width: 100%;
    height: 100%;

    margin: 0;
    padding: 0;
  }

  .payload-hero-side-bleed img {
    display: block;

    object-fit: cover;

    object-position: center;
  }
}


/* =========================================================
   RESPONSIVE - 680PX
   ========================================================= */

@media (max-width:680px) {

  .payload-choice-grid,
  .payload-select-grid,
  .payload-weight-cards {
    grid-template-columns: 1fr;
  }

  .payload-inline-choices {
    display: grid;

    grid-template-columns:
      1fr 1fr;
  }

  .payload-choice-small {
    min-width: 0;
  }

  .payload-primary-button,
  .payload-reset-button {
    width: 100%;

    justify-content: center;
  }
}


/* =========================================================
   RESPONSIVE - 560PX
   ========================================================= */

@media (max-width:560px) {

  #checker::before {
    inset:
      .25rem -.5rem -.75rem;
  }

  .payload-checker-shell {
    padding: 1rem;
  }

  .payload-question {
    padding: 1.1rem;

    border-radius: 14px;
  }

  .article-content .payload-powered {
    text-align: center;
  }
}


/* =========================================================
   RESPONSIVE - 420PX
   ========================================================= */

@media (max-width:420px) {

  .payload-inline-choices {
    grid-template-columns: 1fr;
  }
}


/* =========================================================
   REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion:reduce) {

  .payload-hero-side-bleed img,
  .payload-choice,
  .payload-primary-button,
  .payload-reset-button,
  .payload-hero .hero-tools-label::after,
  .payload-hero .hero-tools-badge {
    transition: none;
  }
}

/* =========================================================
   PAYLOAD ARTICLE CONTENTS - STICKY SCROLL MENU
   Uses the same behaviour as the main article pages.
   ========================================================= */

@media (min-width: 981px) {

  .article-page .article-template-inner {
    align-items: start;
  }

  .article-page .article-toc {
    position: sticky;
    top: 104px;
    align-self: start;

    min-width: 0;

    z-index: 20;
  }

  .article-page .article-toc-card {
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    overscroll-behavior: contain;

    scrollbar-width: thin;
    scrollbar-color: #0c6980 transparent;
  }

  .article-page .article-toc-card::-webkit-scrollbar {
    width: 6px;
  }

  .article-page .article-toc-card::-webkit-scrollbar-track {
    background: transparent;
  }

  .article-page .article-toc-card::-webkit-scrollbar-thumb {
    background: #0c6980;
    border-radius: 999px;
  }
}


/* Active section highlighting */

.article-page .article-toc a {
  position: relative;

  transition:
    background-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.article-page .article-toc a.is-active {
  color: #000;
  background: rgba(92, 225, 230, 0.16);
  transform: translateX(3px);
}

.article-page .article-toc a.is-active::before {
  background: #0c6980;
}


/* Tablet / mobile - TOC returns to normal document flow */

@media (max-width: 980px) {

  .article-page .article-toc {
    position: static;
    top: auto;
  }

  .article-page .article-toc-card {
    max-height: none;
    overflow: visible;
  }

  .article-page .article-toc-card[open] nav {
    max-height: 48vh;
    overflow-y: auto;
  }
}

/* =========================================================
   PAYLOAD-SPECIFIC FIELDS + RESULT METER
   ========================================================= */

.payload-number-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .9rem;
}

.payload-number-field > label {
  display: block;
  margin-bottom: .45rem;
  color: #3f4750;
  font-family: var(--nav-font);
  font-size: .9rem;
  font-weight: 600;
}

.payload-number-field .payload-input-with-unit {
  width: 100%;
}

.payload-result-meter {
  margin: 1.25rem 0 1.1rem;
}

.payload-meter-track {
  position: relative;
  height: 14px;
  overflow: hidden;
  border-radius: 999px;
  background: #e7ecef;
  box-shadow: inset 3px 3px 6px rgba(43,52,62,.10), inset -3px -3px 6px rgba(255,255,255,.85);
}

.payload-meter-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #5ce1e6 0%, #0c6980 100%);
  transition: width 420ms cubic-bezier(.22,1,.36,1), background 220ms ease;
}

.payload-result.is-warning .payload-meter-bar {
  background: linear-gradient(90deg, #f3c96b 0%, #c98b25 100%);
}

.payload-result.is-over .payload-meter-bar {
  background: linear-gradient(90deg, #d36a6a 0%, #9f3434 100%);
}

.payload-meter-labels {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: .5rem;
  color: #6f7f8f;
  font-size: .82rem;
  font-weight: 700;
}

.payload-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: .8rem;
  margin-top: 1.15rem;
}

.payload-summary-card {
  padding: 1rem;
  border: 1px solid #e8edf0;
  border-radius: 14px;
  background: #fff;
  box-shadow: inset 4px 4px 9px rgba(52,62,73,.04), inset -5px -5px 10px rgba(255,255,255,.9);
}

.payload-summary-card span {
  display: block;
  margin-bottom: .3rem;
  color: #6f7f8f;
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.payload-summary-card strong {
  display: block;
  color: #20262d;
  font-family: var(--nav-font);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.15;
}

.payload-result.is-over .payload-result-category {
  color: #fff;
  background: #9f3434;
}

.payload-result.is-warning .payload-result-category {
  color: #20262d;
  background: #f3c96b;
}

.payload-result.is-safe .payload-result-category {
  color: #5ce1e6;
  background: #3f4750;
}

.payload-optional-note {
  margin-top: .9rem;
  padding: .85rem 1rem;
  border-left: 3px solid rgba(12,105,128,.38);
  background: rgba(12,105,128,.045);
  color: #46535d;
  font-size: .92rem;
  line-height: 1.55;
}

@media (max-width: 680px) {
  .payload-number-grid,
  .payload-summary-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .payload-meter-bar { transition: none; }
}