/* ── Backdrop: soft corner glows + four drifting boards ─────────────── */

.backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.backdrop__glow {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(38% 26% at 8% 6%, rgba(226, 86, 106, .14), transparent 70%),
    radial-gradient(38% 26% at 94% 8%, rgba(106, 163, 239, .14), transparent 70%),
    radial-gradient(40% 28% at 4% 88%, rgba(87, 193, 132, .15), transparent 70%),
    radial-gradient(40% 28% at 96% 94%, rgba(171, 134, 228, .15), transparent 70%);
}

.grid-field {
  position: absolute;
  inset: 0;
}

/* keeps the middle of the screen calm, whatever the boards drift over */
.backdrop__veil {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    74% 36% at 50% 51%,
    rgba(251, 251, 253, .93) 0%,
    rgba(251, 251, 253, .82) 42%,
    rgba(251, 251, 253, 0) 76%
  );
}

.grid-slot {
  position: absolute;
  /* one knob scales every board: --bw is the board's desktop size */
  --w: min(56vw, calc(var(--bw) * var(--board-scale, 1)));
  width: var(--w);
  transform: rotate(var(--tilt)) skewY(var(--skew, 0deg));
  transform-origin: 50% 50%;
  will-change: transform;
}

.grid-float {
  animation: drift var(--dur, 24s) ease-in-out var(--delay, 0s) infinite;
  will-change: translate, rotate;
}

.grid-float > svg {
  width: 100%;
  height: auto;
}

@keyframes drift {
  0%   { translate: 0 0;                                          rotate: 0deg; }
  25%  { translate: var(--dx) calc(var(--dy) * -.65);              rotate: var(--dr); }
  50%  { translate: calc(var(--dx) * -.45) var(--dy);              rotate: calc(var(--dr) * -.6); }
  75%  { translate: calc(var(--dx) * -.85) calc(var(--dy) * .35);  rotate: calc(var(--dr) * .75); }
  100% { translate: 0 0;                                           rotate: 0deg; }
}

/* ── Screen shell ───────────────────────────────────────────────────── */

.screen--home {
  justify-content: center;
  gap: clamp(22px, 5.2vh, 46px);
  padding:
    calc(var(--sat) + 9vh)
    calc(var(--sar) + 22px)
    calc(var(--sab) + 3.5vh)
    calc(var(--sal) + 22px);
}

/* ── Brand ──────────────────────────────────────────────────────────── */

.brand {
  position: relative;
  text-align: center;
  user-select: none;
}

/* keeps a drifting board label from landing on the wordmark */
.brand::before {
  content: '';
  position: absolute;
  inset: -34% -14%;
  z-index: -1;
  background: radial-gradient(
    58% 56% at 50% 50%,
    var(--bg) 0%,
    rgba(251, 251, 253, .86) 48%,
    rgba(251, 251, 253, 0) 74%
  );
}

.brand__title {
  margin: 0;
  font-size: clamp(46px, 16.8vw, 88px);
  font-weight: 830;
  letter-spacing: -.035em;
  line-height: .95;
  color: var(--ink);
}

.brand__tagline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 2.6vw, 13px);
  margin: clamp(10px, 2.2vh, 18px) 0 0;
  font-size: clamp(11px, 3.3vw, 15px);
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.brand__tagline > span { display: block; }

.brand__dot {
  width: .34em;
  height: .34em;
  border-radius: 50%;
  background: currentColor;
  opacity: .75;
}

.brand--compact .brand__title { font-size: clamp(34px, 12vw, 58px); }

.brand--compact .brand__tagline {
  margin-top: clamp(6px, 1.4vh, 12px);
  font-size: clamp(9.5px, 2.9vw, 13px);
}

/* ── Menu ───────────────────────────────────────────────────────────── */

.menu {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2.3vh, 20px);
  width: min(282px, 74vw);
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 3vw, 14px);
  width: 100%;
  min-height: clamp(54px, 7.4vh, 64px);
  padding: 0 18px;
  border: 0;
  border-radius: var(--radius-btn);
  background: var(--surface);
  box-shadow: var(--shadow-btn);
  font-size: clamp(18px, 5vw, 22px);
  font-weight: 650;
  letter-spacing: -.01em;
  transition: transform .16s cubic-bezier(.2, .8, .3, 1), box-shadow .16s ease,
    background-color .16s ease, color .16s ease;
}

.btn__icon {
  display: block;
  width: clamp(22px, 6vw, 26px);
  flex: none;
}

.btn__icon svg {
  width: 100%;
  height: auto;
}

.btn__label { display: block; }

.btn:active {
  transform: scale(.972);
  box-shadow: var(--shadow-btn-press);
}

@media (hover: hover) {
  .btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(17, 24, 39, .06), 0 12px 26px rgba(17, 24, 39, .12);
  }
  .btn:active { transform: scale(.98); }
}

/* ── Wider screens: keep the phone proportions, let the board breathe ── */

:root { --board-scale: 1; }

@media (min-width: 900px)  { :root { --board-scale: 1.3; } }
@media (min-width: 1300px) { :root { --board-scale: 1.55; } }

@media (min-width: 720px) {
  .brand__title { font-size: clamp(76px, 8vw, 104px); }
  .brand__tagline { font-size: 16px; letter-spacing: .24em; }
  .menu { width: 340px; }
  .btn { min-height: 66px; font-size: 23px; }
}

@media (prefers-reduced-motion: reduce) {
  .grid-float { animation: none; }
  .btn { transition: none; }
}