/* Flow Sites — retro arcade / Nintendo-inspired (original styling, no Nintendo assets) */
:root {
  --fs-sky: #5c94fc;
  --fs-sky-deep: #3a6fd8;
  --fs-cloud: #f8f8f8;
  --fs-brick: #b85c38;
  --fs-brick-dark: #8b3f24;
  --fs-grass: #00a800;
  --fs-grass-dark: #007800;
  --fs-gold: #f8d878;
  --fs-gold-shadow: #c8a028;
  --fs-red: #e4000b;
  --fs-red-dark: #a80008;
  --fs-white: #fcfcfc;
  --fs-black: #181010;
  --fs-panel: #f0d0a0;
  --fs-panel-border: #181010;
  --fs-pixel: "Press Start 2P", "Courier New", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body.fs-body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--fs-pixel);
  font-size: 10px;
  line-height: 1.6;
  color: var(--fs-black);
  background: linear-gradient(180deg, #7cb0ff 0%, var(--fs-sky) 38%, #4a7fd4 100%);
  overflow-x: hidden;
  cursor: default;
}

@media (min-width: 768px) {
  body.fs-body {
    font-size: 11px;
  }
}

/* Pixel frame utility */
.fs-pixel-box {
  background: var(--fs-panel);
  border: 4px solid var(--fs-panel-border);
  box-shadow:
    inset -4px -4px 0 rgba(0, 0, 0, 0.15),
    inset 4px 4px 0 rgba(255, 255, 255, 0.35),
    0 6px 0 var(--fs-panel-border);
}

.fs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 14px 20px;
  font-family: var(--fs-pixel);
  font-size: 9px;
  line-height: 1.4;
  text-decoration: none;
  text-align: center;
  color: var(--fs-white);
  background: var(--fs-red);
  border: 4px solid var(--fs-black);
  box-shadow: 0 6px 0 var(--fs-red-dark);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  cursor: pointer;
  touch-action: manipulation;
}

.fs-btn:hover,
.fs-btn:focus-visible {
  transform: translateY(2px);
  box-shadow: 0 4px 0 var(--fs-red-dark);
}

.fs-btn:active {
  transform: translateY(6px);
  box-shadow: none;
}

.fs-btn--gold {
  background: var(--fs-gold);
  color: var(--fs-black);
  box-shadow: 0 6px 0 var(--fs-gold-shadow);
}

.fs-btn--gold:hover,
.fs-btn--gold:focus-visible {
  box-shadow: 0 4px 0 var(--fs-gold-shadow);
}

.fs-btn--green {
  background: var(--fs-grass);
  box-shadow: 0 6px 0 var(--fs-grass-dark);
}

.fs-btn--green:hover,
.fs-btn--green:focus-visible {
  box-shadow: 0 4px 0 var(--fs-grass-dark);
}

.fs-btn--ghost {
  background: var(--fs-white);
  color: var(--fs-black);
  box-shadow: 0 6px 0 #c8c8c8;
}

/* Top nav */
.fs-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: max(8px, env(safe-area-inset-top)) 12px 8px;
  background: rgba(92, 148, 252, 0.92);
  border-bottom: 4px solid var(--fs-black);
  backdrop-filter: blur(6px);
}

.fs-nav__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.fs-nav__logo {
  font-size: 9px;
  color: var(--fs-white);
  text-decoration: none;
  text-shadow: 2px 2px 0 var(--fs-black);
  white-space: nowrap;
}

.fs-nav__links {
  display: none;
  align-items: center;
  gap: 12px;
}

@media (min-width: 640px) {
  .fs-nav__links {
    display: flex;
  }
}

.fs-nav__links a {
  font-size: 8px;
  color: var(--fs-white);
  text-decoration: none;
  text-shadow: 1px 1px 0 var(--fs-black);
}

.fs-nav__links a:hover {
  color: var(--fs-gold);
}

.fs-nav__burger {
  display: flex;
  font-family: var(--fs-pixel);
  font-size: 14px;
  padding: 8px 12px;
  background: var(--fs-gold);
  border: 3px solid var(--fs-black);
  cursor: pointer;
}

@media (min-width: 640px) {
  .fs-nav__burger {
    display: none;
  }
}

.fs-mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  background: var(--fs-sky-deep);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.fs-mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
}

.fs-mobile-menu a {
  font-size: 11px;
  color: var(--fs-white);
  text-decoration: none;
  text-shadow: 2px 2px 0 var(--fs-black);
}

/* Hero */
.fs-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  padding: calc(72px + env(safe-area-inset-top)) 16px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  overflow: hidden;
}

.fs-clouds {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.fs-cloud {
  position: absolute;
  width: 64px;
  height: 24px;
  background: var(--fs-cloud);
  border-radius: 12px;
  box-shadow:
    -20px 6px 0 var(--fs-cloud),
    20px 6px 0 var(--fs-cloud),
    0 -8px 0 var(--fs-cloud);
  opacity: 0.95;
  animation: fs-cloud-drift linear infinite;
}

.fs-cloud:nth-child(1) { top: 12%; left: -80px; animation-duration: 28s; }
.fs-cloud:nth-child(2) { top: 22%; left: -120px; animation-duration: 36s; animation-delay: -8s; transform: scale(0.8); }
.fs-cloud:nth-child(3) { top: 8%; left: -60px; animation-duration: 22s; animation-delay: -14s; transform: scale(1.2); }

@keyframes fs-cloud-drift {
  to { transform: translateX(calc(100vw + 200px)); }
}

.fs-hero__title {
  position: relative;
  z-index: 2;
  margin: 24px 0 12px;
  font-size: clamp(18px, 6vw, 36px);
  color: var(--fs-white);
  text-shadow:
    4px 4px 0 var(--fs-black),
    -2px -2px 0 var(--fs-red-dark);
  animation: fs-title-bob 2s ease-in-out infinite;
}

@keyframes fs-title-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.fs-hero__tag {
  position: relative;
  z-index: 2;
  max-width: 420px;
  margin: 0 auto 24px;
  font-size: 8px;
  color: var(--fs-white);
  text-shadow: 2px 2px 0 var(--fs-black);
  line-height: 1.8;
}

.fs-hero__coins {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
}

.fs-coin {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff6a8, var(--fs-gold) 45%, var(--fs-gold-shadow));
  border: 3px solid var(--fs-black);
  animation: fs-coin-spin 1.2s steps(4) infinite;
}

.fs-coin:nth-child(2) { animation-delay: 0.2s; }
.fs-coin:nth-child(3) { animation-delay: 0.4s; }

@keyframes fs-coin-spin {
  0%, 100% { transform: scaleX(1); }
  50% { transform: scaleX(0.35); }
}

.fs-ground {
  position: relative;
  z-index: 2;
  width: 100%;
  margin-top: auto;
}

.fs-grass {
  height: 32px;
  background: repeating-linear-gradient(
    90deg,
    var(--fs-grass) 0,
    var(--fs-grass) 16px,
    var(--fs-grass-dark) 16px,
    var(--fs-grass-dark) 32px
  );
  border-top: 4px solid var(--fs-black);
}

.fs-dirt {
  height: 48px;
  background: repeating-linear-gradient(
    0deg,
    var(--fs-brick) 0,
    var(--fs-brick) 8px,
    var(--fs-brick-dark) 8px,
    var(--fs-brick-dark) 16px
  );
}

/* Sections */
.fs-section {
  position: relative;
  padding: 64px 16px;
  max-width: 1100px;
  margin: 0 auto;
}

.fs-section--dark {
  background: var(--fs-sky-deep);
  max-width: none;
  padding-left: 16px;
  padding-right: 16px;
}

.fs-section--dark .fs-section__inner {
  max-width: 1100px;
  margin: 0 auto;
}

.fs-section__label {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 10px;
  font-size: 8px;
  background: var(--fs-gold);
  border: 3px solid var(--fs-black);
}

.fs-section h2 {
  margin: 0 0 20px;
  font-size: clamp(12px, 3.5vw, 18px);
  color: var(--fs-white);
  text-shadow: 3px 3px 0 var(--fs-black);
}

.fs-section--light h2 {
  color: var(--fs-black);
  text-shadow: none;
}

/* Offer cards */
.fs-offers {
  display: grid;
  gap: 20px;
}

@media (min-width: 700px) {
  .fs-offers {
    grid-template-columns: 1fr 1fr;
  }
}

.fs-offer-card {
  position: relative;
  padding: 24px 20px;
  text-align: left;
  transition: transform 0.2s ease;
}

.fs-offer-card:hover {
  transform: translateY(-4px);
}

.fs-offer-card__badge {
  position: absolute;
  top: -12px;
  right: 16px;
  padding: 6px 10px;
  font-size: 7px;
  background: var(--fs-red);
  color: var(--fs-white);
  border: 3px solid var(--fs-black);
}

.fs-offer-card h3 {
  margin: 0 0 12px;
  font-size: 11px;
}

.fs-offer-card p {
  margin: 0 0 16px;
  font-size: 8px;
  line-height: 1.9;
  font-family: system-ui, sans-serif;
  font-weight: 600;
}

.fs-offer-card ul {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 7px;
  line-height: 2.2;
  font-family: system-ui, sans-serif;
}

.fs-offer-card--basic .fs-offer-card__icon::before { content: "★"; color: var(--fs-grass); }
.fs-offer-card--pro .fs-offer-card__icon::before { content: "◆"; color: var(--fs-red); }

.fs-offer-card__icon {
  font-size: 20px;
  margin-bottom: 8px;
}

/* Question blocks decoration */
.fs-blocks-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 32px;
}

.fs-qblock {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #f8b800 0%, #e89800 50%, #c87800 100%);
  border: 3px solid var(--fs-black);
  animation: fs-block-bounce 0.6s ease-in-out infinite;
}

.fs-qblock:nth-child(2) { animation-delay: 0.15s; }
.fs-qblock:nth-child(3) { animation-delay: 0.3s; }

@keyframes fs-block-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Playground / preview */
.fs-playground {
  padding: 32px 20px;
}

.fs-tier-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.fs-tier-tab {
  flex: 1;
  min-width: 140px;
  padding: 12px;
  font-family: var(--fs-pixel);
  font-size: 8px;
  background: var(--fs-white);
  border: 4px solid var(--fs-black);
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}

.fs-tier-tab.is-active {
  background: var(--fs-gold);
  transform: scale(1.02);
}

.fs-preview-frame-wrap {
  position: relative;
  background: var(--fs-black);
  border: 6px solid var(--fs-black);
  box-shadow: 0 8px 0 rgba(0, 0, 0, 0.35);
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  min-height: 220px;
}

@media (max-width: 639px) {
  .fs-preview-frame-wrap {
    aspect-ratio: 4 / 5;
  }
}

.fs-preview-frame {
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--fs-sky);
}

.fs-preview-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  align-items: center;
  justify-content: space-between;
}

.fs-preview-hint {
  font-size: 7px;
  color: var(--fs-white);
  text-shadow: 1px 1px 0 var(--fs-black);
  font-family: system-ui, sans-serif;
  max-width: 280px;
  line-height: 1.6;
}

/* Fullscreen overlay */
.fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(24, 16, 16, 0.92);
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.fs-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.fs-overlay__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: var(--fs-sky-deep);
  border-bottom: 4px solid var(--fs-black);
}

.fs-overlay__frame {
  flex: 1;
  margin: 12px;
  border: 4px solid var(--fs-black);
  background: #000;
  min-height: 0;
}

.fs-overlay__frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* Scroll reveal */
.fs-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fs-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Marquee */
.fs-marquee-wrap {
  overflow: hidden;
  background: var(--fs-red);
  border-block: 4px solid var(--fs-black);
  padding: 12px 0;
}

.fs-marquee {
  display: flex;
  white-space: nowrap;
  animation: fs-marquee 18s linear infinite;
}

.fs-marquee span {
  padding-right: 48px;
  font-size: 9px;
  color: var(--fs-white);
  text-shadow: 2px 2px 0 var(--fs-black);
}

@keyframes fs-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* CTA footer */
.fs-cta {
  text-align: center;
  padding: 48px 16px 80px;
}

.fs-footer {
  padding: 24px 16px;
  text-align: center;
  background: var(--fs-black);
  color: var(--fs-white);
  font-size: 7px;
}

.fs-footer a {
  color: var(--fs-gold);
}

/* Preview page (fullscreen route) */
.fs-preview-page {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--fs-black);
}

.fs-preview-page__bar {
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: max(10px, env(safe-area-inset-top)) 12px 10px;
  background: var(--fs-sky-deep);
  border-bottom: 4px solid var(--fs-black);
}

.fs-preview-page__main {
  flex: 1;
  min-height: 0;
  padding: 8px;
}

.fs-preview-page__main iframe {
  width: 100%;
  height: 100%;
  min-height: calc(100dvh - 72px);
  border: 4px solid var(--fs-gold);
  background: var(--fs-sky);
}

/* Starfield */
.fs-starfield {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.fs-star {
  position: absolute;
  width: 4px;
  height: 4px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 6px #fff8;
  animation: fs-star-twinkle ease-in-out infinite;
}

@keyframes fs-star-twinkle {
  0%, 100% { opacity: 0.25; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

.fs-hero {
  background: linear-gradient(180deg, transparent 0%, transparent 70%, rgba(0, 168, 0, 0.15) 100%);
}

.fs-offer-card {
  animation: fs-card-float 4s ease-in-out infinite;
}

.fs-offer-card--pro {
  animation-delay: 0.6s;
}

@keyframes fs-card-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.fs-preview-launch {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.fs-preview-frame-wrap {
  box-shadow:
    0 0 0 4px var(--fs-black),
    0 12px 0 var(--fs-black),
    inset 0 0 0 2px var(--fs-gold);
  min-height: 280px;
}

.fs-preview-frame-wrap.is-loading .fs-preview-loader {
  opacity: 1;
  visibility: visible;
}

.fs-preview-loader {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: linear-gradient(180deg, #060816 0%, #1a2a5e 100%);
  color: var(--fs-white);
  font-size: 8px;
  text-shadow: 2px 2px 0 var(--fs-black);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease;
}

.fs-preview-loader-coin {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff6a8, var(--fs-gold));
  border: 3px solid var(--fs-black);
  animation: fs-coin-spin 0.9s steps(4) infinite;
}

.fs-preview-toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.fs-btn {
  position: relative;
  overflow: hidden;
}

.fs-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.35) 50%, transparent 60%);
  transform: translateX(-120%);
  transition: transform 0.45s ease;
}

.fs-btn:hover::after {
  transform: translateX(120%);
}

.fs-section--dark {
  background: linear-gradient(180deg, var(--fs-sky-deep) 0%, #2a4a9a 50%, var(--fs-sky-deep) 100%);
}

.fs-playground {
  background: linear-gradient(145deg, #f5e6c8 0%, var(--fs-panel) 40%, #e8c890 100%);
}

@media (prefers-reduced-motion: reduce) {
  .fs-cloud,
  .fs-coin,
  .fs-qblock,
  .fs-hero__title,
  .fs-marquee,
  .fs-offer-card,
  .fs-star {
    animation: none !important;
  }
  .fs-reveal {
    opacity: 1;
    transform: none;
  }
  .fs-btn::after {
    display: none;
  }
}