/* 全局样式重置 & 基础变量 */
:root {
    --primary-color: #2d9b95;
    --secondary-color: #0e1329;
    --white: #ffffff;
    --gray-light: #f5f7fa;
    --gray: #94a3b8;
    --gray-dark: #64748b;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    --radius: 16px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* 现代风格渐变背景 */
body {
    min-height: 100vh;
    background: linear-gradient(135deg, #1a2980 0%, #26d0ce 100%);
    display: flex;
    align-items: center; /* 垂直居中 */
    justify-content: center; /* 水平居中 */
    padding: 20px;
}

/* 登录卡片 - 居中+现代质感 */
.login-card {
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 30px;
    color: var(--secondary-color);
    backdrop-filter: blur(10px); /* 毛玻璃效果 */
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.login-card h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-color);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 24px;
}

.form-input {
    width: 100%;
    padding: 16px 18px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
    background: var(--white);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(45, 155, 149, 0.1);
}

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

/* 记住密码开关 */
.switch-group {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--gray-dark);
}

.switch {
    position: relative;
    display: inline-block;
    width: 46px;
    height: 24px;
    margin-right: 8px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #e2e8f0;
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* 按钮样式 */
.btn-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.btn {
    padding: 14px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
}

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

.btn-primary:hover {
    background: #258680;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(45, 155, 149, 0.2);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background: rgba(45, 155, 149, 0.05);
}

/* 底部提示区域 */
.tips-area {
    margin-top: 20px;
}

.forgot-password {
    font-size: 13px;
    color: var(--gray);
    margin-bottom: 15px;
    line-height: 1.5;
}

.tg-contact {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: var(--gray-light);
    border-radius: 8px;
    font-size: 14px;
}

.copy-btn {
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.copy-btn:hover {
    background: rgba(45, 155, 149, 0.1);
}

.register-link {
    text-align: center;
    margin-top: 25px;
    font-size: 14px;
    color: var(--gray-dark);
}

.register-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.register-link a:hover {
    text-decoration: underline;
}

/* Toast提示样式 */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.85);
    color: var(--white);
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 9999;
}

.toast.active {
    opacity: 1;
    visibility: visible;
}