/* ==========================================================================
   flip* beta download site
   Standalone static site — tokens sourced from flip* app palette
   ========================================================================== */

:root {
  /* Brand palette */
  --evergreen: #2c3a32;
  --parchment: #f2eadf;
  --mossbank: #2c5c47;
  --mulberry: #5a1f2e;
  --wisteria: #a692dd;
  --terracotta: #c65c39;
  --blossom: #eeb5a0;
  --acorn: #8f6a2c;
  --camellia: #f286b1;
  --harbour: #5193cf;
  --sagebrush: #b0cf9e;
  --sundown: #f0d359;
  --olive: #b6b433;
  --ember: #f0582e;
  --skylight: #bed2e9;
  --riverbed: #5d33bc;
  --glacier: #00b0a8;
  --springleaf: #e0e900;
  --starlight: #66d8dd;

  --card: #f8f2eb;
  --ink: var(--evergreen);

  --font-display: 'Montserrat Alternates', sans-serif;
  --font-body: 'Montserrat', sans-serif;

  --container-max: 1360px;
  --gutter: clamp(24px, 6vw, 96px);

  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-pill: 100px;

  --shadow-soft: 1px 1px 4px rgba(0, 0, 0, 0.2);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--parchment);
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 500;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

img { max-width: 100%; height: auto; display: block; }

main {
  flex: 1 0 auto;
  margin-bottom: -60px;
}

a {
  color: inherit;
  text-decoration: none;
}

:focus-visible {
  outline: 3px solid var(--riverbed);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Ambient background ---------- */

.bg-scene {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.22;
}

.blob--wisteria {
  width: 620px;
  height: 620px;
  top: -220px;
  right: -160px;
  background: var(--wisteria);
}

.blob--sundown {
  width: 480px;
  height: 480px;
  bottom: -180px;
  left: -140px;
  background: var(--sundown);
  opacity: 0.18;
}

/* ---------- Header ---------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 40px var(--gutter) 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.logo-mark-img {
  height: 40px;
  width: auto;
  flex-shrink: 0;
}

.contact-cta {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 18px;
}

.contact-cta__label {
  font-weight: 600;
}

.contact-cta__link {
  font-weight: 700;
  color: var(--terracotta);
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s var(--ease-out);
}

.contact-cta__link:hover,
.contact-cta__link:focus-visible {
  border-color: var(--terracotta);
}

/* ---------- Hero ---------- */

.hero {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(20px, 3vw, 45px) var(--gutter) 76px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 40px;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(42px, 5.2vw, 76px);
  line-height: 1.05;
  margin: 0 0 20px;
  color: var(--evergreen);
}

.hero__title-accent {
  color: var(--wisteria);
}

.hero__subtitle {
  font-size: clamp(18px, 1.6vw, 24px);
  font-weight: 500;
  max-width: 46ch;
  margin: 0 0 36px;
  color: var(--evergreen);
}

.platform-select {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.platform-btn {
  --accent: var(--riverbed);
  --accent-text: var(--riverbed);
  width: 168px;
  height: 168px;
  border-radius: var(--radius-lg);
  border: 1.9px solid var(--accent);
  background: var(--card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background 0.22s var(--ease-out), transform 0.15s var(--ease-out), box-shadow 0.22s var(--ease-out);
  box-shadow: var(--shadow-soft);
  color: var(--evergreen);
}

.platform-btn:hover {
  transform: translateY(-3px);
}

.platform-btn:active {
  transform: translateY(0);
}

.platform-btn--android {
  --accent: var(--mossbank);
  --accent-text: var(--mossbank);
}

.platform-btn__icon {
  width: 46px;
  height: 46px;
  margin-bottom: 6px;
  color: var(--accent);
}

.platform-btn__icon--apple {
  fill: var(--accent-text);
}

.platform-btn__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  color: var(--accent-text);
}

.platform-btn__subtitle {
  font-weight: 500;
  font-size: 14px;
  color: var(--evergreen);
}

.platform-btn.is-selected {
  background: var(--accent);
}

.platform-btn.is-selected .platform-btn__title,
.platform-btn.is-selected .platform-btn__subtitle {
  color: var(--parchment);
}

.platform-btn.is-selected .platform-btn__icon {
  color: var(--parchment);
}

.platform-btn.is-selected .platform-btn__icon--apple {
  fill: var(--parchment);
}

.platform-btn--android .platform-btn__icon {
  --platform-android-mark-dot: var(--card);
}

.platform-btn--android.is-selected .platform-btn__icon {
  --platform-android-mark-dot: var(--mossbank);
}

.hero__image {
  position: relative;
  z-index: 1;
  justify-self: center;
  width: min(100%, 420px);
}

/* ---------- Install panel ---------- */

.install-panel {
  position: relative;
  z-index: 3;
  max-width: var(--container-max);
  margin: -116px auto 0;
  padding: 0 var(--gutter);
}

.install-panel__inner {
  background: var(--card);
  border: none;
  box-shadow: var(--shadow-soft);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: clamp(28px, 4vw, 56px) clamp(20px, 4vw, 56px) calc(clamp(28px, 4vw, 56px) + 60px);

  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transform: translateY(-8px);
  transition: max-height 0.5s var(--ease-out), opacity 0.4s var(--ease-out), transform 0.45s var(--ease-out), padding 0.5s var(--ease-out);
}

.install-panel.is-open .install-panel__inner {
  max-height: 4000px;
  opacity: 1;
  transform: translateY(0);
  padding-top: clamp(28px, 4vw, 56px);
}

.install-panel__heading {
  text-align: center;
  margin-bottom: 40px;
}

.install-panel__heading h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 48px);
  margin: 0 0 8px;
  color: var(--evergreen);
}

.install-panel__heading .accent {
  transition: color 0.2s;
}

.install-panel__heading p {
  margin: 0;
  font-weight: 600;
  font-size: clamp(16px, 1.4vw, 22px);
}

.install-panel__heading strong {
  color: var(--wisteria);
}

.install-panel.platform-android .install-panel__heading strong {
  color: var(--mossbank);
}

/* Steps track */

.steps {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 24px;
  margin-bottom: 20px;
}

.step {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step__badge {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--riverbed);
  color: var(--parchment);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  flex-shrink: 0;
}

.install-panel.platform-android .step__badge {
  background: var(--mossbank);
}

.step__title {
  font-weight: 700;
  font-size: 15px;
  margin: 0 0 6px;
}

.step__desc {
  font-size: 14px;
  margin: 0 0 16px;
  max-width: 30ch;
}

.step__screenshot {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  width: 100%;
  max-width: 220px;
  aspect-ratio: 864 / 1821;
  object-fit: cover;
}

/* Carousel nav — hidden on desktop, shown on mobile */

.steps-nav {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 32px;
}

.steps-nav__btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.9px solid var(--riverbed);
  background: var(--parchment);
  color: var(--riverbed);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s;
}

.install-panel.platform-android .steps-nav__btn {
  border-color: var(--mossbank);
  color: var(--mossbank);
}

.steps-nav__btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.steps-nav__btn:not(:disabled):hover {
  background: var(--card);
}

.steps-nav__dots {
  display: flex;
  gap: 8px;
}

.steps-nav__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blossom);
  padding: 0;
  border: none;
  cursor: pointer;
}

.steps-nav__dot.is-active {
  background: var(--riverbed);
  width: 22px;
  border-radius: 5px;
  transition: width 0.25s var(--ease-out);
}

.install-panel.platform-android .steps-nav__dot.is-active {
  background: var(--mossbank);
}

/* Next steps */

.next-steps {
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--parchment), var(--sundown));
  box-shadow: var(--shadow-soft);
  margin: 40px 0 0;
  padding: clamp(24px, 3vw, 40px);
  display: grid;
  grid-template-columns: auto 1fr auto 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.next-steps__hero {
  width: 130px;
  flex-shrink: 0;
}

.next-steps__hero img {
  width: 100%;
  height: auto;
}

.next-steps__divider {
  align-self: stretch;
  width: 1px;
  background: var(--wisteria);
}

.next-steps__col h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  margin: 0 0 14px;
  color: var(--evergreen);
}

.checklist {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checklist li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
}

.checklist__mark {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--wisteria);
  color: var(--parchment);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.next-steps__note {
  font-size: 15px;
  font-weight: 500;
  margin: 0;
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 16px;
  padding: 16px 34px;
  border-radius: var(--radius-pill);
  background: var(--wisteria);
  color: var(--parchment);
  font-weight: 700;
  font-size: 17px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.15s var(--ease-out), background 0.2s;
}

.btn-pill:hover,
.btn-pill:focus-visible {
  transform: translateY(-2px);
  background: var(--riverbed);
}

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  z-index: 5;
  min-height: 94px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  flex-shrink: 0;
}

.site-footer picture {
  display: block;
  width: 100%;
}

.site-footer__hills {
  display: block;
  width: 100%;
  height: auto;
}

.site-footer__content {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 1;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(20px, 4vw, 38px);
  color: var(--parchment);
  display: flex;
  align-items: center;
  gap: 4px 18px;
  flex-wrap: wrap;
}

.site-footer__copyright {
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  margin: 0;
}

.site-footer__links {
  font-weight: 500;
  font-size: 15px;
  line-height: 1.2;
  margin: 0;
}

.site-footer__links a {
  font-weight: 700;
  color: var(--sundown);
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
  text-decoration: underline;
}

.site-footer__links .divider {
  margin: 0 8px;
  opacity: 0.7;
}

/* ==========================================================================
   Responsive — breakpoint aligned with flip* app (660px)
   ========================================================================== */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .platform-select {
    justify-content: center;
  }

  .hero__image {
    order: -1;
    width: min(70%, 320px);
    margin: 0 auto;
  }

  .install-panel {
    margin-top: -30px;
    margin-bottom: -60px;
  }

  .next-steps {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .next-steps__divider {
    display: none;
  }

  .next-steps__hero {
    margin: 0 auto;
  }

  .checklist li {
    justify-content: center;
  }
}

@media (max-width: 660px) {
  .site-footer {
    min-height: 130px;
  }

  .site-footer__content {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-bottom: clamp(40px, 10vw, 125px);
  }

  .site-header {
    padding-top: 28px;
  }

  .contact-cta {
    font-size: 15px;
    gap: 10px;
  }

  .logo-mark-img { height: 32px; }

  .platform-btn {
    width: 140px;
    height: 140px;
  }

  .platform-btn__icon { width: 38px; height: 38px; }
  .platform-btn__title { font-size: 20px; }

  .install-panel__inner {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
  }

  /* Steps become a horizontal snap-scroll carousel with prev/next controls */
  .steps {
    grid-auto-flow: column;
    grid-auto-columns: 100%;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin-inline: -4px;
    padding-inline: 4px;
  }

  .steps::-webkit-scrollbar { display: none; }

  .step__screenshot { max-width: 240px; }

  .steps-nav {
    display: flex;
  }

  .next-steps {
    padding: 24px 20px;
  }
}

@media (max-width: 420px) {
  .platform-select {
    gap: 16px;
  }

  .platform-btn {
    width: 130px;
    height: 130px;
  }
}

/* Below 1440px (down to the 660px mobile handoff), don't let the footer
   artwork shrink shorter than its 1440px height — freeze it and crop the
   extra width evenly from both sides so the copyright/links stay legible. */
@media (min-width: 661px) and (max-width: 1439px) {
  .site-footer__hills {
    height: 96px;
    object-fit: cover;
    object-position: center;
  }
}