/* ============================================================
   SOLBEAM — solbeam.me
   Single stylesheet, no build step.
   ============================================================ */

:root {
  /* Solana brand palette */
  --sol-purple: #9945FF;
  --sol-green:  #14F195;
  --sol-blue:   #00D1FF;

  /* BSV face */
  --bsv-gold: #E4A11B;

  /* Surfaces */
  --bg:     #05060A;
  --panel:  rgba(255, 255, 255, 0.045);
  --border: rgba(255, 255, 255, 0.10);
  --text:   #EAF0FF;
  --muted:  #98A2B3;

  /* Coin tuning: zoom the BSV image so its gold disc fills the round face.
     The source is a gold disc on a WHITE background, so this must be large
     enough to keep the white margin outside the circle. Increase if you ever
     see a pale rim. (Disc is ~50% of the source frame.) */
  --bsv-zoom: 2.35;

  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ---------- Background ---------- */

.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; }

.bg__glow {
  position: absolute;
  display: block;
  width: 60vmax;
  height: 60vmax;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.30;
  will-change: transform;
}
.bg__glow--purple {
  background: radial-gradient(circle, var(--sol-purple), transparent 68%);
  top: -22vmax; left: -14vmax;
  animation: drift-a 26s ease-in-out infinite alternate;
}
.bg__glow--green {
  background: radial-gradient(circle, var(--sol-green), transparent 68%);
  bottom: -26vmax; right: -16vmax;
  animation: drift-b 32s ease-in-out infinite alternate;
}
.bg__glow--blue {
  background: radial-gradient(circle, var(--sol-blue), transparent 70%);
  top: 32%; left: 46%;
  width: 42vmax; height: 42vmax;
  opacity: 0.18;
  animation: drift-c 38s ease-in-out infinite alternate;
}
.bg__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.030) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.030) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 72%);
}

@keyframes drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(8vmax, 6vmax, 0) scale(1.12); }
}
@keyframes drift-b {
  from { transform: translate3d(0, 0, 0) scale(1.08); }
  to   { transform: translate3d(-7vmax, -5vmax, 0) scale(1); }
}
@keyframes drift-c {
  from { transform: translate3d(-4vmax, 0, 0) scale(1); }
  to   { transform: translate3d(5vmax, -4vmax, 0) scale(1.15); }
}

/* ---------- Layout ---------- */

.wrap {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(32px, 8vh, 88px) 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 22px;
}

/* ---------- The coin ---------- */

.coin {
  position: relative;
  width: clamp(140px, 38vw, 208px);
  aspect-ratio: 1 / 1;
  margin-top: 8px;
}

.coin__halo {
  position: absolute;
  inset: -14%;
  border-radius: 50%;
  background: conic-gradient(from 140deg,
              var(--sol-purple), var(--sol-blue), var(--sol-green),
              var(--bsv-gold), var(--sol-purple));
  filter: blur(26px);
  opacity: 0.45;
  animation: halo 9s linear infinite;
}

@keyframes halo { to { transform: rotate(360deg); } }

/* Deliberately 2D — no perspective, no preserve-3d, no backface-visibility.
   The coin squashes to edge-on, the faces swap, and it grows back, which
   reads as a spin and renders identically in every browser. (The earlier 3D
   version rendered differently in Firefox.) */
.coin__inner {
  position: relative;
  width: 100%;
  height: 100%;
  animation: coin-spin 9s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

.coin__face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.65);
  background-repeat: no-repeat;
  background-position: 50% 50%;
}

/* Logos are painted as face backgrounds so border-radius clips them.
   The <img> tags stay in the markup as a static fallback and are hidden. */
.coin__face img { display: none; }

/* The old fallback glyph. It MUST stay hidden: the BSV logo is now painted as
   the face background, so leaving this visible draws a SECOND ₿ on top of the
   image (a ghosted/doubled logo). Prefer deleting the <span> from index.html. */
.coin__glyph { display: none; }

.coin__face--sol {
  background-color: #000;
  background-image: url("/assets/solana.webp");
  background-size: cover;
  animation: face-sol 9s steps(1, end) infinite;
}

.coin__face--bsv {
  background-color: var(--bsv-gold);
  background-image: url("/assets/bsv.jpg");
  /* Zoom past the white margin so the gold disc fills the round face.
     Tune with --bsv-zoom in :root (2.35 = 235%). */
  background-size: calc(var(--bsv-zoom) * 100%) calc(var(--bsv-zoom) * 100%);
  animation: face-bsv 9s steps(1, end) infinite;
}

/* Squash to edge-on, swap, grow back. */
@keyframes coin-spin {
  0%,  40%  { transform: scaleX(1); }
  48%       { transform: scaleX(0); }
  56%, 78%  { transform: scaleX(1); }
  86%       { transform: scaleX(0); }
  94%, 100% { transform: scaleX(1); }
}

/* The swap happens exactly when the coin is edge-on (zero width). */
@keyframes face-sol {
  0%   { opacity: 1; }
  48%  { opacity: 0; }
  86%  { opacity: 1; }
  100% { opacity: 1; }
}
@keyframes face-bsv {
  0%   { opacity: 0; }
  48%  { opacity: 1; }
  86%  { opacity: 0; }
  100% { opacity: 0; }
}

/* ---------- Type ---------- */

.title {
  margin: 4px 0 0;
  font-size: clamp(44px, 13vw, 92px);
  line-height: 0.95;
  letter-spacing: 0.02em;
  font-weight: 800;
  background: linear-gradient(100deg,
              var(--sol-purple) 0%, var(--sol-blue) 34%,
              var(--sol-green) 62%, var(--bsv-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-wrap: balance;
}

.tagline {
  margin: 0;
  font-size: clamp(15px, 4vw, 19px);
  color: var(--muted);
  letter-spacing: 0.01em;
}

.tick { color: var(--bsv-gold); font-weight: 600; }

/* ---------- Steps ---------- */

.steps {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
  width: 100%;
  margin-top: 6px;
}

.step {
  flex: 1 1 0;
  min-width: 0;
  padding: 16px 12px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
}

.step__num {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sol-green);
  font-weight: 600;
}

.step__label {
  font-size: clamp(18px, 5vw, 24px);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.step__sub {
  font-size: 12px;
  color: var(--muted);
}

.step__arrow {
  display: flex;
  align-items: center;
  color: var(--muted);
  flex: 0 0 auto;
}

/* ---------- CTA ---------- */

.cta { margin-top: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 650;
  text-decoration: none;
  color: #05060A;
  background: linear-gradient(100deg, var(--sol-green), var(--sol-blue) 55%, var(--sol-purple));
  box-shadow: 0 10px 30px rgba(20, 241, 149, 0.22);
  transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
}
.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 16px 38px rgba(20, 241, 149, 0.30);
}
.btn:focus-visible { outline: 2px solid var(--sol-blue); outline-offset: 3px; }

.fineprint {
  margin: 6px 0 0;
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.01em;
}

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

.footer {
  padding: 18px 24px 26px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--muted);
}
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--text); text-decoration: underline; }
.dot { opacity: 0.5; }

/* ---------- Motion preferences ---------- */

@media (prefers-reduced-motion: reduce) {
  .coin__inner { animation: none; }
  .coin__halo { animation: none; }
  .bg__glow { animation: none; }
  /* Cross-fade the two faces instead of spinning */
  .coin__face--sol { animation: none; opacity: 1; }
  .coin__face--bsv { animation: coin-fade 9s ease-in-out infinite; }
  @keyframes coin-fade {
    0%, 40%   { opacity: 0; }
    52%, 76%  { opacity: 1; }
    88%, 100% { opacity: 0; }
  }
}

/* ---------- Small screens ---------- */

@media (max-width: 480px) {
  .steps { flex-direction: column; }
  .step__arrow { transform: rotate(90deg); }
}