/* login.css - 登录页面专属样式 */
/* CSS变量定义 */
:root {
  --coffee-brown: #4e342e;
  --secondary-color: #d7ccc8;
  --primary-color: #3e2723;
  --accent-cream: #fff8e1;
  --text-color: #2e1d19;
  --hover-color: #8d6e63;
}
/* 背景全屏咖啡纹理图 */
.login-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--coffee-dark) 0%, var(--coffee-brown) 100%);
  z-index: -1;
}

.login-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 2px, transparent 2px),
    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.1) 1px, transparent 1px),
    radial-gradient(circle at 40% 20%, rgba(255,255,255,0.05) 3px, transparent 3px);
  background-size: 100px 100px, 150px 150px, 200px 200px;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

/* 登录框居中 */
.login-container {
  width: 380px;
  margin: 0 auto;
  padding: 2.5rem;
  background: rgba(255, 248, 225, 0.95);
  border-radius: 12px;
  box-shadow: 0 15px 35px rgba(0,0,0,0.3);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  animation: fadeInScale 1.2s ease-out forwards;
  backdrop-filter: blur(10px);
}

.login-container h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--coffee-dark);
  font-size: 1.8rem;
  position: relative;
}

.login-container h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background: var(--coffee-brown);
  border-radius: 2px;
}

/* 输入框样式 */
.input-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--coffee-dark);
  font-weight: 500;
  transition: color 0.3s;
}

.input-group input {
  width: 100%;
  padding: 0.8rem;
  border: 2px solid var(--coffee-light);
  border-radius: 6px;
  outline: none;
  transition: all 0.3s;
  font-size: 1rem;
  background: rgba(255,255,255,0.9);
}

.input-group input:focus {
  border-color: var(--coffee-brown);
  box-shadow: 0 0 0 3px rgba(78, 52, 46, 0.1);
  transform: translateY(-2px);
}

.input-group input:focus + label {
  color: var(--coffee-brown);
}

/* 登录按钮 */
.login-btn {
  width: 100%;
  margin-top: 1rem;
  background: linear-gradient(135deg, var(--coffee-dark) 0%, var(--coffee-brown) 100%);
  color: var(--accent-cream);
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  padding: 0.9rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 6px;
  position: relative;
  overflow: hidden;
}

.login-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.login-btn:hover::before {
  left: 100%;
}

.login-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.login-btn:active {
  transform: translateY(-1px);
}

/* 淡入缩放动画 */
@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

/* 额外装饰元素 */
.login-container::before {
  content: '☕';
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2rem;
  background: var(--coffee-brown);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* 响应式设计 */
@media (max-width: 480px) {
  .login-container {
    width: 90%;
    padding: 2rem;
  }
}