/* =========================================================
   Fixed Float (ff-io.io) — Global Stylesheet
   Palette: white, black, blue, orange
   ========================================================= */

:root {
  --color-white: #ffffff;
  --color-black: #0c111c;
  --color-ink: #1d2436;
  --color-muted: #5a6478;
  --color-line: #e5e9f2;
  --color-bg: #f6f8fc;
  --color-bg-soft: #fbfcff;
  --color-blue: #1f6feb;
  --color-blue-deep: #0b4cc1;
  --color-blue-soft: #e8f0ff;
  --color-orange: #ff7a1a;
  --color-orange-deep: #e35d00;
  --color-orange-soft: #fff1e6;
  --color-success: #1ea97c;
  --shadow-sm: 0 2px 6px rgba(15, 30, 60, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 30, 60, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 30, 60, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --container: 1200px;
  --header-h: 72px;
  --font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--color-blue); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-blue-deep); }
h1, h2, h3, h4 { line-height: 1.2; color: var(--color-black); margin-top: 0; }
h1 { font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -.01em; }
h3 { font-size: 1.3rem; }
p  { margin: 0 0 1em; color: var(--color-ink); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section--soft { background: var(--color-bg); }
.section--blue { background: linear-gradient(135deg, #eaf2ff 0%, #f7faff 100%); }
.section--orange { background: linear-gradient(135deg, #fff3e8 0%, #fffaf5 100%); }
.section--dark { background: var(--color-black); color: #d8dee9; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }

/* ========== HEADER ========== */
.site-header {
  position: sticky; top: 0; z-index: 999;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-line);
}
.site-header__inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.15rem; color: var(--color-black);
}
.brand__logo {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-orange));
  display: grid; place-items: center; color: #fff; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.nav { display: flex; align-items: center; gap: 28px; }
.nav__list {
  display: flex; gap: 22px; list-style: none; padding: 0; margin: 0;
}
.nav__list a {
  color: var(--color-ink); font-weight: 500; font-size: .95rem;
}
.nav__list a:hover { color: var(--color-blue); }
.nav__cta {
  background: var(--color-orange); color: #fff !important;
  padding: 10px 18px; border-radius: 999px; font-weight: 600;
  box-shadow: 0 6px 18px rgba(255,122,26,.35);
}
.nav__cta:hover { background: var(--color-orange-deep); color: #fff !important; }

.lang-switcher { position: relative; }
.lang-switcher__btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-bg); color: var(--color-ink);
  padding: 8px 12px; border-radius: 999px; font-weight: 600; font-size: .85rem;
  border: 1px solid var(--color-line); cursor: pointer;
}
.lang-switcher__menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: #fff; border: 1px solid var(--color-line);
  border-radius: 12px; padding: 8px; min-width: 220px;
  box-shadow: var(--shadow-md); display: none;
  max-height: 320px; overflow: auto;
}
.lang-switcher__menu.open { display: block; }
.lang-switcher__menu a {
  display: block; padding: 8px 12px; border-radius: 8px;
  color: var(--color-ink); font-size: .9rem;
}
.lang-switcher__menu a:hover { background: var(--color-bg); color: var(--color-blue); }

.menu-toggle { display: none; background: none; border: 0; cursor: pointer; }
.menu-toggle span {
  display: block; width: 24px; height: 2px; background: var(--color-ink); margin: 5px 0; border-radius: 2px;
}

/* ========== HERO ========== */
.hero {
  padding: 80px 0 60px;
  background:
    radial-gradient(900px 400px at 90% 0%, rgba(255,122,26,.10), transparent 60%),
    radial-gradient(700px 350px at 0% 100%, rgba(31,111,235,.10), transparent 60%),
    var(--color-bg-soft);
  position: relative; overflow: hidden;
}
.hero__grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center;
}
.hero__eyebrow {
  display: inline-block; font-weight: 700; font-size: .8rem;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--color-blue); background: var(--color-blue-soft);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 16px;
}
.hero__title { margin: 0 0 16px; }
.hero__title em { font-style: normal; color: var(--color-orange); }
.hero__lead { font-size: 1.15rem; color: var(--color-muted); max-width: 560px; }
.hero__ctas { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 600; font-size: .98rem;
  border: 0; cursor: pointer; transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn--primary {
  background: var(--color-orange); color: #fff;
  box-shadow: 0 10px 22px rgba(255,122,26,.35);
}
.btn--primary:hover { background: var(--color-orange-deep); color: #fff; transform: translateY(-1px); }
.btn--secondary {
  background: var(--color-blue); color: #fff;
  box-shadow: 0 10px 22px rgba(31,111,235,.30);
}
.btn--secondary:hover { background: var(--color-blue-deep); color: #fff; transform: translateY(-1px); }
.btn--ghost {
  background: transparent; color: var(--color-ink);
  border: 1px solid var(--color-line);
}
.btn--ghost:hover { border-color: var(--color-blue); color: var(--color-blue); }

/* ========== EXCHANGE WIDGET ========== */
.exchange-card {
  background: #fff; border-radius: var(--radius-xl);
  padding: 28px; box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-line);
  position: relative;
}
.exchange-card__row {
  background: var(--color-bg); border-radius: 18px;
  padding: 18px 18px; display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px; align-items: center; margin-bottom: 12px;
  border: 1px solid var(--color-line);
}
.exchange-card__label { font-size: .8rem; color: var(--color-muted); margin-bottom: 4px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }
.exchange-card__amount {
  width: 100%; border: 0; background: transparent;
  font-size: 1.6rem; font-weight: 700; color: var(--color-black);
  outline: none;
}
.exchange-card__coin {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--color-line); border-radius: 999px;
  padding: 8px 14px; font-weight: 700; cursor: pointer;
}
.exchange-card__coin img { width: 22px; height: 22px; }
.exchange-card__swap {
  display: grid; place-items: center; width: 44px; height: 44px;
  background: var(--color-blue); color: #fff; border-radius: 50%;
  margin: -22px auto; cursor: pointer; box-shadow: var(--shadow-md);
  border: 4px solid #fff; position: relative; z-index: 1;
}
.exchange-card__rate {
  display: flex; justify-content: space-between; padding: 8px 4px;
  font-size: .85rem; color: var(--color-muted); margin-top: 4px;
}
.exchange-card__cta { width: 100%; justify-content: center; margin-top: 12px; }

/* ========== FEATURES / CARDS ========== */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--color-line);
  border-radius: var(--radius-lg); padding: 28px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(31,111,235,.3); }
.card__icon {
  width: 56px; height: 56px; border-radius: 16px;
  background: var(--color-blue-soft); color: var(--color-blue);
  display: grid; place-items: center; margin-bottom: 16px;
}
.card__icon--orange { background: var(--color-orange-soft); color: var(--color-orange-deep); }
.card h3 { margin: 0 0 8px; font-size: 1.2rem; }
.card p { color: var(--color-muted); margin: 0; }

/* ========== STATS ========== */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat {
  background: #fff; border: 1px solid var(--color-line);
  border-radius: var(--radius-md); padding: 24px; text-align: center;
}
.stat__num { font-size: 2rem; font-weight: 800; color: var(--color-blue); }
.stat__label { color: var(--color-muted); font-size: .9rem; }

/* ========== STEPS / HOW IT WORKS ========== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: #fff; border-radius: var(--radius-lg);
  padding: 28px; border: 1px solid var(--color-line); position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: -16px; left: 24px;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-orange); color: #fff;
  display: grid; place-items: center; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.step h3 { margin-top: 12px; }

/* ========== COIN GRID ========== */
.coin-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px;
}
.coin-tile {
  display: flex; align-items: center; gap: 10px;
  background: #fff; border: 1px solid var(--color-line);
  border-radius: var(--radius-md); padding: 14px 16px;
  font-weight: 600; color: var(--color-ink);
  transition: all .2s;
}
.coin-tile:hover { border-color: var(--color-blue); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.coin-tile img { width: 32px; height: 32px; }
.coin-tile small { display: block; color: var(--color-muted); font-weight: 500; font-size: .8rem; }

/* ========== FAQ (native <details><summary>) ========== */
.faq__item {
  background: #fff; border: 1px solid var(--color-line);
  border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden;
}
.faq__q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 22px; cursor: pointer; font-weight: 600;
  list-style: none;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q::after { content: "+"; color: var(--color-blue); font-size: 1.4rem; transition: transform .2s ease; }
details.faq__item[open] .faq__q::after { content: "−"; }
.faq__a { padding: 0 22px 18px; color: var(--color-muted); }
/* legacy fallback for div-based markup */
div.faq__item .faq__a { display: none; }
div.faq__item.open .faq__a { display: block; }

/* ========== CONTENT (article) ========== */
.article { max-width: 880px; margin: 0 auto; }
.article p { font-size: 1.05rem; }
.article h2 { margin-top: 2.4em; }
.article h3 { margin-top: 1.8em; }
.article ul, .article ol { padding-left: 1.4em; color: var(--color-ink); }
.article li { margin-bottom: .5em; }
.article blockquote {
  margin: 1.5em 0; padding: 16px 22px;
  border-left: 4px solid var(--color-orange);
  background: var(--color-orange-soft);
  border-radius: 0 12px 12px 0;
  color: var(--color-ink);
  font-style: italic;
}

.toc {
  background: var(--color-bg); border: 1px solid var(--color-line);
  border-radius: var(--radius-md); padding: 20px 24px; margin-bottom: 32px;
}
.toc h4 { margin: 0 0 10px; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--color-muted); }
.toc ol { margin: 0; padding-left: 1.2em; }
.toc a { color: var(--color-ink); }
.toc a:hover { color: var(--color-blue); }

/* ========== TABLES ========== */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--color-line); }
table { width: 100%; border-collapse: collapse; background: #fff; }
table th, table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--color-line); }
table th { background: var(--color-bg); font-weight: 700; color: var(--color-black); font-size: .9rem; }
table tr:last-child td { border-bottom: 0; }

/* ========== CALLOUT / CTA ========== */
.cta-banner {
  background: linear-gradient(135deg, var(--color-blue), var(--color-orange));
  color: #fff; border-radius: var(--radius-xl); padding: 48px;
  display: grid; grid-template-columns: 1.4fr auto; gap: 24px; align-items: center;
}
.cta-banner h2 { color: #fff; margin: 0 0 8px; }
.cta-banner p { color: rgba(255,255,255,.92); margin: 0; }
.cta-banner .btn--primary { background: #fff; color: var(--color-black); }
.cta-banner .btn--primary:hover { background: #f5f5f5; color: var(--color-black); }

/* ========== FOOTER ========== */
.site-footer {
  background: var(--color-black); color: #aab3c5; padding: 64px 0 24px;
}
.site-footer h4 { color: #fff; font-size: .95rem; margin: 0 0 14px; text-transform: uppercase; letter-spacing: .08em; }
.site-footer a { color: #aab3c5; font-size: .92rem; }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 32px;
  padding-bottom: 32px; border-bottom: 1px solid #1f2738;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-bottom {
  padding-top: 24px; display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between;
  font-size: .85rem;
}
.footer-brand p { margin-top: 12px; color: #aab3c5; max-width: 320px; font-size: .92rem; }

/* ========== BACK TO TOP ========== */
.back-to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 998;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-blue); color: #fff;
  border: 0; cursor: pointer; display: grid; place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none; transition: opacity .25s ease, transform .25s ease;
  transform: translateY(8px);
}
.back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* ========== COOKIE BANNER ========== */
.cookie-banner {
  position: fixed; left: 22px; right: 22px; bottom: 22px; z-index: 1000;
  background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--color-line);
  box-shadow: var(--shadow-lg); padding: 20px 24px;
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between;
  max-width: 980px; margin: 0 auto;
  transform: translateY(140%); transition: transform .35s cubic-bezier(.2,.8,.2,1);
}
.cookie-banner.show { transform: translateY(0); }
.cookie-banner p { margin: 0; color: var(--color-ink); font-size: .92rem; }
.cookie-banner__actions { display: flex; gap: 10px; }

/* ========== BREADCRUMBS ========== */
.breadcrumbs {
  font-size: .85rem; color: var(--color-muted);
  padding: 14px 0; border-bottom: 1px solid var(--color-line);
  background: var(--color-bg-soft);
}
.breadcrumbs a { color: var(--color-muted); }
.breadcrumbs a:hover { color: var(--color-blue); }
.breadcrumbs span { margin: 0 8px; }

/* ========== HERO ALT (subpages) ========== */
.page-hero {
  padding: 70px 0 50px;
  background:
    radial-gradient(700px 300px at 100% 0%, rgba(31,111,235,.10), transparent 60%),
    radial-gradient(500px 250px at 0% 100%, rgba(255,122,26,.10), transparent 60%),
    var(--color-bg-soft);
  text-align: left;
}
.page-hero__grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center;
}
.page-hero__lead { color: var(--color-muted); font-size: 1.1rem; max-width: 620px; }

/* ========== ILLUSTRATION FRAMES ========== */
.illu-frame {
  background: linear-gradient(135deg, #f0f5ff, #fff5ec);
  border-radius: var(--radius-xl); padding: 24px;
  border: 1px solid var(--color-line);
}

/* ========== UTILITIES ========== */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0 !important; }
.mb-2 { margin-bottom: 16px !important; }
.mb-4 { margin-bottom: 32px !important; }
.mt-4 { margin-top: 32px !important; }
.muted { color: var(--color-muted); }
.tag { display: inline-block; padding: 4px 10px; border-radius: 999px; background: var(--color-blue-soft); color: var(--color-blue); font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.tag--orange { background: var(--color-orange-soft); color: var(--color-orange-deep); }

.section-title { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-title p { color: var(--color-muted); font-size: 1.05rem; }

/* ========== RESPONSIVE ========== */
@media (max-width: 980px) {
  .hero__grid, .page-hero__grid { grid-template-columns: 1fr; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-banner { grid-template-columns: 1fr; text-align: center; }
}
@media (max-width: 640px) {
  .nav__list { display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--color-line);
    padding: 16px 24px; flex-direction: column; gap: 14px; }
  .nav__list.open { display: flex; }
  .menu-toggle { display: block; }
  .grid--3, .grid--4, .grid--2, .stats, .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero { padding: 56px 0 36px; }
  .cta-banner { padding: 32px; }
  .cookie-banner { left: 12px; right: 12px; bottom: 12px; padding: 14px; }
}

/* ========== ANIMATIONS ========== */
@keyframes float-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.float { animation: float-soft 5s ease-in-out infinite; }