:root {
  --primary-color: #1ecf9f;
  --bg-body: #f3f4f6;
  --card-bg: #ffffff;
  --text-main: #333333;
  --text-sub: #888888;
  --border-color: #eeeeee;
  --shadow-float: 0 8px 30px rgba(0,0,0,0.12);
}

body {
  margin: 0; padding: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-body);
  display: flex; justify-content: center; align-items: center;
  height: 100vh; color: var(--text-main);
}

.login-container {
  background: var(--card-bg);
  padding: 50px 40px;
  border-radius: 24px;
  box-shadow: var(--shadow-float);
  width: 100%; max-width: 400px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* 顶部装饰条 */
.login-container::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 6px;
    background: linear-gradient(90deg, #1ecf9f, #2bd9d9);
}

.logo {
  font-size: 28px; font-weight: 800; color: var(--primary-color);
  margin-bottom: 40px; letter-spacing: 2px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
}

.form-group { margin-bottom: 24px; text-align: left; }

.input-wrapper { position: relative; }
.input-wrapper input {
  width: 100%; padding: 14px 15px 14px 44px;
  border: 1px solid transparent; background: #f8f8f8;
  border-radius: 12px; font-size: 14px; color: var(--text-main);
  transition: all 0.3s; box-sizing: border-box;
}
.input-wrapper input:focus {
  background: white; border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(30,207,159,0.1); outline: none;
}
.input-icon {
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  color: #bbb; font-size: 16px; transition: color 0.3s;
}
.input-wrapper input:focus + .input-icon { color: var(--primary-color); } /* 需要HTML调整顺序才能生效CSS选择器，或者用JS。这里简单处理 */

.btn-primary {
  width: 100%; padding: 14px;
  background: var(--primary-color); color: white;
  border: none; border-radius: 12px;
  font-size: 16px; font-weight: 600; cursor: pointer;
  transition: all 0.2s; margin-top: 10px;
  box-shadow: 0 4px 12px rgba(30,207,159,0.3);
}
.btn-primary:hover { background: #15b38a; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(30,207,159,0.4); }
.btn-primary:active { transform: translateY(0); }

/* 次要按钮样式 */
.btn-secondary {
  background: #f0f0f0 !important;
  color: #666 !important;
  box-shadow: none !important;
}
.btn-secondary:hover {
  background: #e0e0e0 !important;
  transform: translateY(-2px);
}

.footer-links { margin-top: 25px; font-size: 13px; color: var(--text-sub); }
.footer-links a { color: var(--primary-color); text-decoration: none; font-weight: 500; cursor: pointer; margin-left: 5px; }
.footer-links a:hover { text-decoration: underline; }

/* Toast 提示 (顶部居中, 绿色) */
.toast-container {
    position: fixed; top: 40px; left: 50%; transform: translateX(-50%);
    z-index: 3000; display: flex; flex-direction: column; gap: 10px;
    pointer-events: none;
}
.toast {
    padding: 16px 32px; border-radius: 50px;
    background: white; color: #333;
    font-size: 15px; font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    display: flex; align-items: center; gap: 12px;
    animation: slideDown 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    min-width: 260px; justify-content: center;
}
/* 成功: 绿底白字 或 白底绿字+边框 */
.toast.success, .toast.login-success, .toast.register-success {
    background: #e6fffa; color: #1ecf9f; 
    border: 2px solid #1ecf9f;
}
.toast.error {
    background: #fff5f5; color: #ff5252;
    border: 2px solid #ff5252;
}
.toast i { font-size: 20px; }

/* 登录/注册成功 大尺寸样式 */
.toast.login-success, .toast.register-success {
    padding: 20px 50px;
    font-size: 18px;
    box-shadow: 0 15px 40px rgba(30,207,159,0.3);
}

@keyframes slideDown {
    from { transform: translateY(-30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* 模态框背景 */
.dialog-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.6);
    z-index: 2000; display: none; align-items: center; justify-content: center;
    backdrop-filter: blur(5px);
}
.dialog-overlay.show { display: flex; }
.dialog-box {
    background: white; border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    overflow: hidden;
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
@keyframes popIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}