/* ==== SPOLEČNÝ GLASS ZÁKLAD ==== */
.glass-card {
  width: 100%;
  max-width: 420px;
  border-radius: 18px;
  padding: 35px 25px;
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25), 
              inset 0 1px 1px rgba(255,255,255,0.2);
  margin: 0 auto;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.glass-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(232, 165, 212, 0.15), transparent 40%),
              radial-gradient(circle at 70% 70%, rgba(201, 58, 138, 0.1), transparent 45%);
  animation: orbFloat 10s ease-in-out infinite;
  z-index: 0;
  pointer-events: none;
}
.glass-card > * {
  position: relative;
  z-index: 1;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 40px rgba(201, 58, 138, 0.3), 0 12px 40px rgba(0,0,0,0.3), 
              inset 0 1px 1px rgba(255,255,255,0.25);
}

.glass-card h2 {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 25px;
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

.glass-card form {
  display: flex;
  flex-direction: column;
}

.glass-card label {
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 0.95rem;
  color: #fff;
}

.glass-card input {
  padding: 12px 14px;
  margin-bottom: 18px;
  border: none;
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--transition-normal);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.25);
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

.glass-card input:focus {
  transform: scale(1.02);
  background: rgba(255, 255, 255, 0.28);
  box-shadow: 0 0 0 2px rgba(255, 180, 200, 0.35),
              0 4px 16px rgba(255, 150, 180, 0.22);
}

.glass-card input::placeholder {
  opacity: 0.7;
  color: #ddd;
}

.glass-card button {
  position: relative;
  overflow: hidden;
  padding: 12px;
  font-size: 1.05rem;
  font-weight: bold;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  background: linear-gradient(135deg, rgba(255, 150, 150, 0.4), rgba(255, 100, 100, 0.25));
  color: #fff;
}

.glass-card button:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg), 
              0 0 12px rgba(255,255,255,0.4);
  background: linear-gradient(135deg, rgba(255, 170, 170, 0.5), rgba(255, 120, 120, 0.35));
}

.glass-card button:active {
  transform: scale(0.96);
}

/* Ripple efekt */
.glass-card button .ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple-elegant 900ms cubic-bezier(0.4, 0, 0.2, 1);
  background-color: rgba(197, 2, 2, 0.747);
  pointer-events: none;
  opacity: 0.6;
  filter: blur(2px);
}

@keyframes ripple-elegant {
  0% { transform: scale(0); opacity: 0.6; }
  50% { opacity: 0.3; }
  100% { transform: scale(3.5); opacity: 0; }
}

.glass-card p {
  font-size: 0.9rem;
  text-align: center;
  margin-top: 15px;
  color: #fff;
}

.glass-card .link {
  font-weight: 500;
  text-decoration: underline;
  color: #ffd6d6;
  transition: color 0.25s ease;
}

.glass-card .link:hover {
  color: #ff6666;
}

/* ==== REGISTRACE ==== */
#registration .glass-card {
  margin-top: 180px;
  background: rgba(255, 245, 250, 0.18);
  border: 1px solid rgba(255, 180, 200, 0.22);
  color: #fff;
  box-shadow: 0 8px 32px rgba(220, 60, 100, 0.13),
              inset 0 1px 2px rgba(255, 255, 255, 0.22);
}

/* Checkbox */
.checkbox-container {
  margin: 10px 0;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  font-size: 0.9rem;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

.required {
  color: #fff;
}

.required-text {
  font-size: 0.8rem;
  color: #ddd;
  margin-left: 28px;
}

/* Error & Success hlášky */
.error {
  color: #fff;
  background: rgba(244, 67, 54, 0.85);
  padding: 10px 15px;
  border-radius: 8px;
  margin-bottom: 15px;
  font-weight: 500;
  text-align: center;
}

.success {
  color: #fff;
  background: rgba(76, 175, 80, 0.85);
  padding: 10px 15px;
  border-radius: 8px;
  margin-bottom: 15px;
  font-weight: 500;
  text-align: center;
}

/* Marketingový checkbox – decentní barva */
#marketing + span {
  color: #ccc;
  font-size: 0.9rem;
}

#marketing:checked + span {
  color: #ffbbbb;
  font-weight: 500;
}
