.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  border-color: var(--gray-200);
  box-shadow: var(--shadow);
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--black);
  text-decoration: none;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.03);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--gray-200);
  border-radius: 100px;
  padding: 0.2rem;
}

.lang-btn {
  border: none;
  background: transparent;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: 100px;
  cursor: pointer;
  color: var(--gray-600);
  transition: all var(--transition);
}

.lang-btn.active {
  background: var(--white);
  color: var(--black);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.lang-btn:hover:not(.active) {
  color: var(--black);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  padding: 1rem 2.25rem;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--black);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--gray-900);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary .arrow {
  transition: transform var(--transition);
}

.btn-primary:hover .arrow {
  transform: translateX(4px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--black);
  color: var(--white);
  padding: 1rem 1.75rem;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 200;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background: #22c55e;
}

.toast.error {
  background: #e53e3e;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: blobFloat 8s ease-in-out infinite;
  pointer-events: none;
}

.hero-blob--1 {
  width: 500px;
  height: 500px;
  background: var(--pink);
  top: -10%;
  right: -10%;
  animation-delay: 0s;
}

.hero-blob--2 {
  width: 400px;
  height: 400px;
  background: #ffd6e8;
  bottom: -5%;
  left: -8%;
  animation-delay: -3s;
}

.hero-blob--3 {
  width: 250px;
  height: 250px;
  background: var(--pink-dark);
  top: 40%;
  left: 50%;
  opacity: 0.15;
  animation-delay: -5s;
}