:root {
  /* ===== 主題配色（柔和植物系） ===== */
  --primary-dark: #b1d3c5; /* 薄荷綠 */
  --cyber-blue: #e1f1e7; /* 淡青綠 */
  --tech-blue: #cfdd8e; /* 嫩綠黃 */
  --purple-tech: #e4beb3; /* 柔粉紅 */
  --cyber-yellow: #cfdd8e; /* 黃綠 */
  --danger: #e8908a; /* 柔紅 */
  --success: #77c593; /* 草綠 */

  /* ===== 深色版（按鈕 & 強調用） ===== */
  --primary-dark-strong: #8faea2; /* 深薄荷綠 */
  --cyber-blue-dark: #b5cfc8; /* 深淡青綠 */
  --tech-blue-dark: #a5c76b; /* 深嫩綠黃 */
  --purple-tech-dark: #c48f87; /* 深粉紅 */
  --cyber-yellow-dark: #a6b85f; /* 深黃綠 */
  --danger-dark: #d66d64; /* 深紅 */
  --success-dark: #4d9c72; /* 深草綠 */

  /* ===== 背景與結構 ===== */
  --dark-bg: #e1f1e7; /* 全局背景 */
  --card-bg: #ffffff; /* 卡片底色 */
  --sidebar-bg: #b1d3c5; /* 側邊欄 */

  /* ===== 文字與邊框 ===== */
  --text-dark: #2e2e2e; /* 主文字 */
  --text-light: #ffffff; /* 白字 */
  --text-muted: #6b7280; /* 次要文字 */
  --border-color: #d1d5db; /* 邊框 */

  /* ===== 狀態色 ===== */
  --success: #77c593;
  --warning: #f6c96d;
  --danger: #e8908a;

  /* ===== 尺寸 ===== */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 70px;
  --header-height: 70px;
  --btn-radius: 25px;
}

/* 登入頁面樣式 - 植物清新設計 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-dark) 50%, var(--cyber-blue) 100%);
  color: var(--text-dark);
  overflow: hidden;
}

.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

/* 背景裝飾 */
.bg-decoration {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 1;
}

.bg-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.25;
}

.bg-circle-1 {
  top: 20%;
  left: 20%;
  width: 400px;
  height: 400px;
  background: var(--primary-dark);
}

.bg-circle-2 {
  bottom: 20%;
  right: 20%;
  width: 400px;
  height: 400px;
  background: var(--purple-tech);
}

/* 登入表單容器 */
.login-wrapper {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 450px;
}

.login-form-container {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px);
  border: 1px solid var(--primary-dark);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

/* Logo 區域 */
.logo-section {
  text-align: center;
  margin-bottom: 40px;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: 20px;
}

.logo-icon i {
  font-size: 30px;
  color: var(--text-dark);
  animation: pulse 2s infinite;
}

.system-title {
  font-size: 28px;
  font-weight: bold;
  color: var(--primary-dark-strong);
  margin-bottom: 8px;
}

.system-subtitle {
  color: var(--text-muted);
  font-size: 16px;
}

/* 表單樣式 */
.login-form {
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  color: var(--text-dark);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}

.form-label i {
  color: var(--primary-dark);
  margin-right: 8px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid var(--primary-dark);
  border-radius: 10px;
  color: var(--text-dark);
  font-size: 16px;
  transition: all 0.3s ease;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--tech-blue);
  background: #ffffff;
  box-shadow: 0 0 15px rgba(207, 221, 142, 0.4);
  transform: translateY(-2px);
}

/* 密碼輸入框 */
.password-input-wrapper {
  position: relative;
}

.password-input {
  padding-right: 50px;
}

.password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  transition: color 0.3s ease;
}

.password-toggle:hover {
  color: var(--primary-dark);
}

/* 表單選項 */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

.remember-me {
  display: flex;
  align-items: center;
  color: var(--text-dark);
  font-size: 14px;
  cursor: pointer;
}

.remember-checkbox {
  margin-right: 8px;
  width: 16px;
  height: 16px;
  accent-color: var(--primary-dark);
}

.forgot-password {
  color: var(--purple-tech);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

.forgot-password:hover {
  color: var(--danger);
}

/* 登入按鈕 */
.login-btn {
  width: 100%;
  background: var(--primary-dark-strong);
  border: none;
  color: var(--text-light);
  font-size: 16px;
  font-weight: 600;
  padding: 15px;
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition: all 0.3s ease;
}

.login-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(177, 211, 197, 0.5);
}

.login-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* 底部資訊 */
.footer-info {
  text-align: center;
  margin-top: 20px;
}

.security-info {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 15px;
}

.security-item {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 12px;
}

.security-item i {
  margin-right: 4px;
}

.security-item:first-child i {
  color: var(--success);
}

.security-item:last-child i {
  color: var(--primary-dark);
}

.copyright {
  color: var(--text-muted);
  font-size: 12px;
}

/* 動畫 */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* RWD 響應式設計 */
@media (max-width: 768px) {
  .login-form-container {
    padding: 30px 25px;
  }
  .logo-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 15px;
  }
  .logo-icon i {
    font-size: 24px;
  }
  .system-title {
    font-size: 24px;
  }
  .system-subtitle {
    font-size: 14px;
  }
  .form-input {
    padding: 12px 14px;
    font-size: 14px;
  }
  .login-btn {
    padding: 12px;
    font-size: 14px;
  }
  .security-info {
    flex-direction: column;
    gap: 8px;
  }
  .bg-circle-1,
  .bg-circle-2 {
    width: 250px;
    height: 250px;
  }
}

@media (max-width: 480px) {
  .login-form-container {
    padding: 25px 20px;
  }
  .form-options {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }
}