/* ============================================
   BIOMETRICS HOUSE — Brand Components
   Zdroj: bh-gradients-2026 + bh-buttons-showcase
   Sync: 2026-04-10
   ============================================ */

/* ── GRADIENT BACKGROUNDS ── */

/* 01 Aurora Mesh */
.bg-deep-ocean {
  background:
    radial-gradient(ellipse 140% 120% at 15% 15%, rgba(27,0,226,0.8) 0%, transparent 55%),
    radial-gradient(ellipse 100% 100% at 85% 85%, rgba(69,144,255,0.3) 0%, transparent 55%),
    var(--dark-blue);
}
.bg-midnight-pulse {
  background:
    radial-gradient(ellipse 130% 110% at 20% 20%, rgba(0,87,255,0.9) 0%, transparent 50%),
    radial-gradient(ellipse 80% 80% at 80% 80%, rgba(27,0,226,0.6) 0%, transparent 50%),
    var(--dark-blue);
}
.bg-nordic-blue {
  background:
    radial-gradient(ellipse 120% 100% at 10% 30%, rgba(27,0,226,0.4) 0%, transparent 55%),
    radial-gradient(ellipse 90% 90% at 90% 70%, rgba(69,144,255,0.25) 0%, transparent 55%),
    var(--dark-blue);
}
.bg-sapphire-glow {
  background:
    radial-gradient(ellipse 100% 100% at 50% 50%, rgba(27,0,226,0.5) 0%, transparent 50%),
    radial-gradient(ellipse 80% 80% at 80% 20%, rgba(0,87,255,0.3) 0%, transparent 50%),
    radial-gradient(ellipse 70% 70% at 20% 80%, rgba(69,144,255,0.3) 0%, transparent 50%),
    var(--dark-blue);
}

/* 02 Soft Flow (animated) */
@keyframes softFlow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.bg-ocean-breeze {
  background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue), var(--sky-blue));
  background-size: 300% 300%;
  animation: softFlow 10s ease infinite;
}
.bg-twilight {
  background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue), var(--azure-blue));
  background-size: 300% 300%;
  animation: softFlow 12s ease infinite;
}
.bg-steel-wave {
  background: linear-gradient(135deg, var(--dark-blue), var(--azure-blue), var(--primary-blue));
  background-size: 300% 300%;
  animation: softFlow 14s ease infinite;
}

/* 04 Radial Glow (animated) */
@keyframes glowPulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.7; }
}
@keyframes glowShift {
  0%, 100% { background-position: 0% 0%; }
  50%      { background-position: 100% 100%; }
}
.bg-core {
  background:
    radial-gradient(circle at 50% 50%, rgba(27,0,226,0.4), rgba(3,28,64,0.6) 50%, var(--dark-blue));
  animation: glowPulse 6s ease-in-out infinite;
}
.bg-beam {
  background:
    radial-gradient(ellipse 100% 50% at 50% 0%, rgba(27,0,226,0.35), transparent 50%),
    radial-gradient(ellipse 100% 50% at 50% 100%, rgba(3,28,64,0.5), transparent 50%),
    var(--dark-blue);
  animation: glowShift 8s ease-in-out infinite;
}

/* ── BUTTONS ── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Montserrat', sans-serif;
  font-weight: var(--btn-weight);
  font-size: 0.875rem;
  letter-spacing: var(--btn-tracking);
  border: none;
  cursor: pointer;
  padding: 0 1.25rem;
  height: 44px;
  border-radius: var(--btn-radius);
  /* Emil: scoped props (nie `all`) + snappy press. Transform 160ms = okamžitá odozva na
     stlačenie; box-shadow 300ms = mäkký hover lift. `all` by animoval aj nechcené vlastnosti. */
  transition: transform 160ms cubic-bezier(0.16, 1, 0.3, 1), box-shadow 300ms cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}
.btn:hover  { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(0.97); }

/* Sizes */
.btn-lg   { height: 52px; padding: 0 1.75rem; font-size: 1rem; border-radius: var(--btn-radius); }
.btn-pill { border-radius: 999px; }
.btn-icon { width: 44px; height: 44px; padding: 0; border-radius: 50%; justify-content: center; }

/* 01 — Solid */
.btn-primary { background: var(--primary-blue); color: #fff; }
.btn-primary:hover { box-shadow: 0 8px 30px rgba(27,0,226,0.4); }

.btn-azure { background: var(--azure-blue); color: #fff; }
.btn-azure:hover { box-shadow: 0 8px 30px rgba(0,87,255,0.4); }

.btn-sky { background: var(--sky-blue); color: #fff; }
.btn-sky:hover { box-shadow: 0 8px 30px rgba(69,144,255,0.4); }

.btn-dark { background: var(--dark-blue); color: #fff; border: 1px solid rgba(255,255,255,0.1); }
.btn-dark:hover { box-shadow: 0 8px 30px rgba(0,0,0,0.5); }

.btn-outline-primary { background: transparent; color: var(--primary-blue); border: 2px solid var(--primary-blue); }
.btn-outline-primary:hover { background: rgba(27,0,226,0.08); }

.btn-outline-azure { background: transparent; color: var(--azure-blue); border: 2px solid var(--azure-blue); }
.btn-outline-azure:hover { background: rgba(0,87,255,0.08); }

.btn-ghost { background: transparent; color: var(--sky-blue); }
.btn-ghost:hover { background: rgba(69,144,255,0.08); }

/* 02 — Gradient */
.btn-grad-ocean   { background: var(--btn-grad-ocean); color: #fff; }
.btn-grad-ocean:hover { box-shadow: 0 8px 30px rgba(0,87,255,0.4); }

.btn-grad-violet  { background: var(--btn-grad-primary); color: #fff; }
.btn-grad-violet:hover { box-shadow: 0 8px 30px rgba(27,0,226,0.4); }

.btn-grad-electric { background: linear-gradient(135deg, var(--primary-blue), var(--sky-blue)); color: #fff; }
.btn-grad-electric:hover { box-shadow: 0 8px 30px rgba(27,0,226,0.3); }

.btn-grad-aurora  { background: linear-gradient(135deg, var(--primary-blue), var(--azure-blue), var(--sky-blue)); color: #fff; }
.btn-grad-aurora:hover { box-shadow: 0 8px 30px rgba(69,144,255,0.3); }

.btn-grad-deep    { background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue)); color: #fff; }
.btn-grad-midnight { background: linear-gradient(135deg, var(--dark-blue), var(--azure-blue)); color: #fff; }

/* 03 — Liquid Glass */
.btn-glass {
  background: rgba(255,255,255,0.2);
  color: var(--dark-blue);
  border: 1px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow:
    inset 0 2px 10px rgba(255,255,255,0.2),
    inset 0 -1px 4px rgba(0,0,0,0.06),
    0 4px 16px rgba(0,0,0,0.1);
}
.btn-glass:hover {
  background: rgba(255,255,255,0.3);
  border-color: rgba(255,255,255,0.5);
  box-shadow:
    inset 0 2px 12px rgba(255,255,255,0.25),
    0 8px 32px rgba(0,0,0,0.15);
}

.btn-glass-blue {
  background: rgba(0,87,255,0.15);
  color: #fff;
  border: 1px solid rgba(0,87,255,0.35);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: inset 0 2px 10px rgba(69,144,255,0.15), 0 4px 16px rgba(0,0,0,0.1);
}
.btn-glass-blue:hover {
  background: rgba(0,87,255,0.22);
  border-color: rgba(0,87,255,0.5);
  box-shadow: inset 0 2px 12px rgba(69,144,255,0.2), 0 0 24px rgba(0,87,255,0.2);
}

.btn-glass-neon {
  background: rgba(27,0,226,0.12);
  color: #fff;
  border: 1.5px solid var(--primary-blue);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: 0 0 20px rgba(27,0,226,0.25), 0 0 40px rgba(27,0,226,0.1);
}
.btn-glass-neon:hover {
  box-shadow: 0 0 28px rgba(27,0,226,0.4), 0 0 56px rgba(27,0,226,0.15);
  background: rgba(27,0,226,0.18);
}

/* ── CARDS ── */

/* Solid card */
.card-solid {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 1.75rem;
  transition: transform 0.4s cubic-bezier(0.16,1,0.3,1), box-shadow 0.4s;
}
.card-solid:hover { transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,0.3); }
.card-solid.c-primary { border-color: rgba(27,0,226,0.3); background: rgba(27,0,226,0.06); }
.card-solid.c-azure   { border-color: rgba(0,87,255,0.3); background: rgba(0,87,255,0.06); }
.card-solid.c-sky     { border-color: rgba(69,144,255,0.3); background: rgba(69,144,255,0.06); }

/* Glass card — Apple Liquid Glass */
.card-glass {
  background: rgba(255,255,255,0.22);
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 20px;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow:
    inset 0 4px 20px rgba(255,255,255,0.2),
    inset 0 -2px 8px rgba(0,0,0,0.06),
    0 8px 32px rgba(0,0,0,0.12);
  transition: transform 0.4s cubic-bezier(0.16,1,0.3,1), box-shadow 0.4s, background 0.3s;
}
.card-glass:hover {
  background: rgba(255,255,255,0.3);
  border-color: rgba(255,255,255,0.5);
  box-shadow:
    inset 0 4px 24px rgba(255,255,255,0.25),
    inset 0 -2px 10px rgba(0,0,0,0.08),
    0 16px 48px rgba(0,0,0,0.18);
  transform: translateY(-4px);
}