/* ────────────────────────────────────────────────────────────────────────
   Xpensic — Premium UI foundation
   Glassmorphism, custom cursor, ambient blobs, motion, FAB.
   ──────────────────────────────────────────────────────────────────────── */

/* ─── Inter / Poppins from Google Fonts ───────────────────────────────── */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@400;500;600;700;800&display=swap");

/* ─── Page background + ambient blobs ─────────────────────────────────── */
html, body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color var(--dur-med) var(--ease-out),
              color var(--dur-med) var(--ease-out);
}

body {
  position: relative;
  overflow-x: hidden;
  /* Ambient gradient blobs — premium fintech "depth" backdrop */
  background:
    radial-gradient(900px 600px at 8% -10%, rgba(99, 102, 241, 0.22), transparent 60%),
    radial-gradient(720px 520px at 100% 12%, rgba(20, 184, 166, 0.18), transparent 65%),
    radial-gradient(960px 700px at 50% 110%, rgba(99, 102, 241, 0.16), transparent 70%),
    var(--color-bg);
  background-attachment: fixed;
}

/* Dark: near-black page with only a whisper of colour in the corners. */
:root[data-theme="dark"] body {
  background:
    radial-gradient(900px 600px at 8% -10%, rgba(99, 102, 241, 0.10), transparent 60%),
    radial-gradient(720px 520px at 100% 12%, rgba(20, 184, 166, 0.06), transparent 65%),
    radial-gradient(960px 700px at 50% 110%, rgba(99, 102, 241, 0.06), transparent 70%),
    var(--color-bg);
}

:root[data-theme="light"] body {
  background:
    radial-gradient(900px 600px at 8% -10%, rgba(99, 102, 241, 0.12), transparent 60%),
    radial-gradient(720px 520px at 100% 12%, rgba(20, 184, 166, 0.10), transparent 65%),
    radial-gradient(960px 700px at 50% 110%, rgba(99, 102, 241, 0.08), transparent 70%),
    var(--color-bg);
}

/* When the user prefers reduced motion, freeze the ambient motion */
@media (prefers-reduced-motion: reduce) {
  body { background-attachment: scroll; }
}

/* ─── Headings ────────────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-strong);
  margin: 0;
}

h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-md); }

/* ─── Glass primitives ────────────────────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.glass--strong {
  background: var(--glass-bg-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  backdrop-filter: var(--glass-blur-strong);
  border-color: var(--glass-border-strong);
}

.glass--soft {
  background: var(--glass-bg-soft);
  -webkit-backdrop-filter: var(--glass-blur-soft);
  backdrop-filter: var(--glass-blur-soft);
}

.glass-card {
  position: relative;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--dur-med) var(--ease-out),
    box-shadow var(--dur-med) var(--ease-out),
    border-color var(--dur-med) var(--ease-out);
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--glass-border-strong);
}

/* Subtle inner highlight on every glass card for that "edge of light" feel */
.glass-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 30%);
  mix-blend-mode: screen;
  opacity: 0.6;
}

/* ─── Glass button ────────────────────────────────────────────────────── */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 18px;
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-pill);
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  color: var(--color-text);
  border: 1px solid var(--glass-border-strong);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color var(--dur-med) var(--ease-out),
    color var(--dur-med) var(--ease-out),
    border-color var(--dur-med) var(--ease-out),
    transform var(--dur-med) var(--ease-spring),
    box-shadow var(--dur-med) var(--ease-out);
}

.btn:hover {
  background: #000;
  color: #FFFFFF;
  border-color: #000;
  transform: scale(1.03);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

.btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

:root[data-theme="light"] .btn:hover {
  background: #0F172A;
  color: #FFFFFF;
  border-color: #0F172A;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.30);
}

/* Brand-coloured CTA — uses the gradient hero palette */
.btn--primary {
  background: var(--grad-primary);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: var(--shadow-glow-primary);
}
.btn--primary:hover {
  background: #000;
  color: #FFFFFF;
  border-color: #000;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}
:root[data-theme="light"] .btn--primary:hover {
  background: #0F172A;
  color: #FFFFFF;
  border-color: #0F172A;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.35);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
}
.btn--ghost:hover {
  background: rgba(0, 0, 0, 0.85);
  color: #FFFFFF;
  border-color: rgba(0, 0, 0, 0.85);
}
:root[data-theme="light"] .btn--ghost:hover {
  background: #0F172A;
  color: #FFFFFF;
  border-color: #0F172A;
}

/* Text link — ghost button that looks like an inline link. Used for
   secondary actions on the login / unlock gates ("Use recovery phrase",
   "Link this device"). */
.btn--link {
  background: none;
  border: none;
  box-shadow: none;
  padding: 4px 8px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
}
.btn--link:hover {
  background: none;
  color: var(--color-text);
  border-color: transparent;
  box-shadow: none;
  transform: none;
}
:root[data-theme="light"] .btn--link:hover {
  background: none;
  color: var(--color-text);
  border-color: transparent;
  box-shadow: none;
}

/* Inline text-link button — compact, no pill chrome. Used inside OTP /
   forgot-password rows (e.g. "Copy"). */
.btn--inline {
  padding: 2px 6px;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn--danger {
  color: var(--color-danger);
  border-color: var(--color-danger-soft);
  background: var(--color-danger-soft);
}
.btn--danger:hover {
  background: var(--color-danger);
  color: #FFFFFF;
  border-color: var(--color-danger);
}

.btn--sm {
  padding: 6px 12px;
  font-size: var(--text-sm);
}

.btn--lg {
  padding: 14px 26px;
  font-size: var(--text-md);
}

.btn--icon {
  padding: 0;
  width: 38px;
  height: 38px;
}

.btn--block { width: 100%; }

/* ─── Cursor spotlight ────────────────────────────────────────────────── */
/* The native OS cursor is always visible. A soft radial glow trails
   behind it as ambient light. The element (#cursor-spotlight) is created
   and positioned by js/cursor.js; it is decorative only (pointer-events:
   none) and never repaints the elements underneath. It sits above normal
   content but below modals/overlays so it can't wash out dialog text. */
.cursor-spotlight {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  pointer-events: none;
  z-index: 400;
  opacity: 0;
  transition: opacity 320ms var(--ease-out);
  will-change: transform;
}
.cursor-spotlight.is-visible { opacity: 1; }
.cursor-spotlight::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(1);
  background: radial-gradient(
    circle,
    var(--cursor-spotlight-color) 0%,
    transparent 62%
  );
  transition: transform 280ms var(--ease-out);
}
/* Bloom a little larger over interactive controls as hover feedback. */
.cursor-spotlight.is-expanded::before {
  transform: translate(-50%, -50%) scale(1.22);
}
@media (prefers-reduced-motion: reduce) {
  .cursor-spotlight { display: none; }
}

/* ─── FAB (Floating Action Button) ────────────────────────────────────── */
.fab {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 80;
  display: none;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--grad-hero);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: var(--shadow-glow-primary);
  cursor: pointer;
  font-size: 24px;
  transition:
    transform var(--dur-med) var(--ease-spring),
    box-shadow var(--dur-med) var(--ease-out);
}
.fab:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 18px 48px rgba(99, 102, 241, 0.50);
}
.fab:active { transform: scale(0.96); }

@media (max-width: 720px) {
  .fab { display: inline-flex; }
}

/* ─── Skip-link stays accessible, themed ──────────────────────────────── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  z-index: 1000;
}
.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

/* ─── Selection color ─────────────────────────────────────────────────── */
::selection {
  background: var(--color-primary-soft);
  color: var(--color-text-strong);
}

/* ─── Scrollbar (subtle, themed) ──────────────────────────────────────── */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 8px;
}
*::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-faint);
}

/* ─── Skeleton loader ─────────────────────────────────────────────────── */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-2);
  border-radius: var(--radius-sm);
}
.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.06) 50%,
    transparent 100%
  );
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%); }
}

/* ─── Subtle ambient pulse on key brand chips ─────────────────────────── */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 var(--color-primary-soft); }
  50%      { box-shadow: 0 0 0 8px transparent; }
}

/* ─── Dark theme: hover states ────────────────────────────────────────────
   The base hover (black fill) vanishes on a black page, so in dark the
   hover lifts to a lighter surface instead. */
:root[data-theme="dark"] .btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.38);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
}
:root[data-theme="dark"] .btn--primary:hover {
  background: linear-gradient(135deg, #818CF8 0%, #6366F1 100%);
  border-color: transparent;
  box-shadow: var(--shadow-glow-primary);
}
:root[data-theme="dark"] .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.10);
  border-color: rgba(255, 255, 255, 0.20);
}

/* ─── Print: tone down the glass for paper ───────────────────────────── */
@media print {
  body { background: #fff !important; color: #000 !important; }
  .glass, .glass-card, .glass--strong, .glass--soft {
    background: #fff !important;
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
}