/* ═══════════════════════════════════════════════════════════════════════
   HYPERFLEX — shared mobile design system
   ────────────────────────────────────────────────────────────────────────
   Single source of truth for mobile tokens + base polish.
   Load AFTER any page's inline <style> so these tokens win on the cascade.

   Goals:
   • One breakpoint to rule them all: `max-width: 640px`.
   • iOS-first: safe-area insets, 16px minimum input font (no zoom),
     -webkit-text-size-adjust pinned at 100%.
   • Typography scale uses CSS vars so rewrites only touch one place.
   • Spacing tokens replace ad-hoc padding/margin values.
   • Modern mobile patterns: drag-handle bottom sheets, large touch
     targets (44px min, 52px for primary CTAs), soft shadows.

   Rules:
   • All new mobile CSS should reference these tokens, not raw pixel values.
   • Prefer class-based selectors (.hfx-*) over tag or ID selectors so the
     system composes without specificity wars.
   • No !important unless fighting inline styles written by someone else.
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Global tokens (available everywhere, even on desktop) ─────────── */
:root {
  /* Type scale — numeric steps that compose with line-height multipliers */
  --hfx-fs-2xs: 10px;
  --hfx-fs-xs:  11px;
  --hfx-fs-sm:  13px;
  --hfx-fs-md:  15px;
  --hfx-fs-lg:  17px;
  --hfx-fs-xl:  20px;
  --hfx-fs-2xl: 24px;
  --hfx-fs-3xl: 30px;
  --hfx-fs-4xl: 36px;

  /* Spacing — 4px base grid */
  --hfx-s-1: 4px;
  --hfx-s-2: 8px;
  --hfx-s-3: 12px;
  --hfx-s-4: 16px;
  --hfx-s-5: 20px;
  --hfx-s-6: 24px;
  --hfx-s-7: 32px;
  --hfx-s-8: 40px;

  /* Radii */
  --hfx-r-sm: 6px;
  --hfx-r-md: 10px;
  --hfx-r-lg: 14px;
  --hfx-r-xl: 20px;

  /* Touch targets */
  --hfx-touch-min: 44px;   /* iOS HIG min */
  --hfx-touch-lg:  52px;   /* primary CTA */

  /* Shadows — soft, modern */
  --hfx-shadow-sm:  0 1px 2px rgba(0,0,0,0.12), 0 0 0 1px rgba(255,255,255,0.04);
  --hfx-shadow-md:  0 4px 16px rgba(0,0,0,0.18), 0 0 0 1px rgba(255,255,255,0.05);
  --hfx-shadow-lg:  0 12px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(255,255,255,0.06);

  /* Safe-area insets — default to 0 on browsers without env() */
  --hfx-safe-top:    env(safe-area-inset-top,    0px);
  --hfx-safe-right:  env(safe-area-inset-right,  0px);
  --hfx-safe-bottom: env(safe-area-inset-bottom, 0px);
  --hfx-safe-left:   env(safe-area-inset-left,   0px);
}

/* ── Base: viewport polish applies on ALL screens but quietly ─────── */
html {
  -webkit-text-size-adjust: 100%;  /* iOS Safari: don't auto-inflate after rotate */
  text-size-adjust: 100%;
}
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ── Reusable mobile-friendly components (opt-in via class) ──────── */

/* Modern card — soft shadow, generous padding, consistent radius */
.hfx-card {
  background: var(--cream, #141420);
  border: 1px solid var(--border, #1e1e2a);
  border-radius: var(--hfx-r-lg);
  padding: var(--hfx-s-5);
  box-shadow: var(--hfx-shadow-sm);
}

/* Bottom-sheet modal — mobile-native feel with drag handle */
.hfx-bottom-sheet {
  position: fixed; inset: auto 0 0 0;
  max-height: 92vh;
  overflow-y: auto;
  background: var(--cream, #141420);
  border-radius: var(--hfx-r-xl) var(--hfx-r-xl) 0 0;
  padding-bottom: calc(var(--hfx-s-6) + var(--hfx-safe-bottom));
  box-shadow: var(--hfx-shadow-lg);
  -webkit-overflow-scrolling: touch;
  animation: hfx-sheet-in .24s cubic-bezier(.4,0,.2,1);
}
.hfx-bottom-sheet::before {
  content: '';
  display: block;
  width: 40px; height: 4px;
  margin: 10px auto 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.2);
}
@keyframes hfx-sheet-in {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

/* Primary CTA — large, tappable, confident */
.hfx-btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--hfx-s-2);
  min-height: var(--hfx-touch-lg);
  padding: 0 var(--hfx-s-5);
  border-radius: var(--hfx-r-md);
  font-size: var(--hfx-fs-md);
  font-weight: 700;
  letter-spacing: 0.01em;
  border: none;
  background: var(--gold, #c9920d);
  color: #0a0a0f;
  cursor: pointer;
  transition: transform .1s, box-shadow .15s;
}
.hfx-btn-cta:active { transform: scale(0.98); }
.hfx-btn-cta:focus-visible { outline: 2px solid var(--gold, #c9920d); outline-offset: 2px; }

/* Utility: prevent horizontal overflow at the document root */
.hfx-no-overflow-x { overflow-x: hidden; max-width: 100vw; }

/* ── Phone (≤640px) — where the real work happens ─────────────────── */
@media (max-width: 640px) {
  /* Global baseline */
  html, body { overflow-x: hidden; }
  body { font-size: var(--hfx-fs-sm); line-height: 1.5; }

  /* Any input can't drop below 16px or iOS Safari zooms on focus */
  input, select, textarea { font-size: 16px; }

  /* Any tap target at least 44px without us having to remember */
  button, a[role="button"], [onclick] {
    min-height: var(--hfx-touch-min);
  }

  /* Modern bottom-sheet modal upgrade — applied to existing .modal-overlay patterns */
  .hfx-sheet-active .modal {
    border-radius: var(--hfx-r-xl) var(--hfx-r-xl) 0 0;
    padding-bottom: calc(var(--hfx-s-5) + var(--hfx-safe-bottom));
  }
  .hfx-sheet-active .modal::before {
    content: '';
    display: block;
    width: 40px; height: 4px;
    margin: 10px auto 2px;
    border-radius: 999px;
    background: rgba(255,255,255,0.18);
  }
}