/* --- GİRİŞ EKRANI (ULTRA PREMIUM) --- */
#login-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: linear-gradient(135deg, #ff9a9e 0%, #ff6b6b 50%, #ff4757 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  overflow: hidden;
  transition:
    opacity 1s ease,
    visibility 1s;
}

#login-screen::before {
  content: "❤️";
  position: absolute;
  font-size: 2rem;
  color: rgba(255, 255, 255, 0.3);
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: pulseBackground 3s infinite alternate;
  opacity: 0.1;
  pointer-events: none;
}

@keyframes pulseBackground {
  0% {
    transform: scale(1);
    opacity: 0.1;
  }
  100% {
    transform: scale(1.2);
    opacity: 0.3;
  }
}

.login-box {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  padding: 3rem;
  border-radius: 30px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
  text-align: center;
  max-width: 420px;
  width: 90%;
  border: 2px solid rgba(255, 255, 255, 1);
  transform: translateY(0);
  transition: transform 0.3s ease;
}

.login-box:hover {
  transform: translateY(-5px);
}

.login-box h1 {
  background: -webkit-linear-gradient(45deg, #ff4757, #ff6b81);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: "Poppins", sans-serif;
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  font-weight: 800;
  letter-spacing: -1px;
}

.login-box p {
  color: #555;
  margin-bottom: 2rem;
  font-size: 1rem;
  line-height: 1.5;
  font-weight: 500;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.input-group input {
  padding: 18px;
  border: 2px solid #f1f2f6;
  border-radius: 15px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: #f8f9fa;
  color: #333;
  width: 100%;
}

.input-group input:focus {
  outline: none;
  border-color: #ff4757;
  background: white;
  box-shadow: 0 0 20px rgba(255, 71, 87, 0.2);
}

.input-group button {
  padding: 18px;
  background: linear-gradient(45deg, #ff4757, #ff6b81);
  color: white;
  border: none;
  border-radius: 15px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 700;
  transition: all 0.3s ease;
  box-shadow: 0 10px 25px rgba(255, 71, 87, 0.4);
  width: 100%;
}

.input-group button:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 15px 30px rgba(255, 71, 87, 0.6);
}

.input-group button:active {
  transform: scale(0.98);
}

@media screen and (max-width: 768px) {
  .login-box {
    padding: 2rem;
    width: 85%;
  }
  .login-box h1 {
    font-size: 1.8rem;
  }
}