* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Montserrat', sans-serif;
}

body {
    background: #f6f5f7;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: 'Montserrat', sans-serif;
    height: 100vh;
    margin: -20px 0 50px;
    overflow: hidden;
    background: linear-gradient(to right, #141e30, #243b55);
}

#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

h1 {
    font-weight: bold;
    margin: 0;
}

h2 {
    text-align: center;
}

p {
    font-size: 14px;
    font-weight: 100;
    line-height: 20px;
    letter-spacing: 0.5px;
    margin: 20px 0 30px;
}

span {
    font-size: 12px;
}

a {
    color: #333;
    font-size: 14px;
    text-decoration: none;
    margin: 15px 0;
}

button {
    border-radius: 20px;
    border: 1px solid #ff4b2b;
    background-color: #ff4b2b;
    color: #ffffff;
    font-size: 12px;
    font-weight: bold;
    padding: 12px 45px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: transform 80ms ease-in;
    cursor: pointer;
}

button:active {
    transform: scale(0.95);
}

button:focus {
    outline: none;
}

button.ghost {
    background-color: transparent;
    border-color: #ffffff;
}

.btn-rounded {
    border-radius: 25px !important;
    padding: 8px 24px !important;
    font-weight: 600 !important;
    letter-spacing: 0.5px !important;
    transition: all 0.3s ease !important;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2) !important;
}

.btn-rounded:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 10px rgba(0,0,0,0.25) !important;
}

.btn-rounded.btn-danger {
    background: linear-gradient(45deg, #ff416c, #ff4b2b) !important;
    border: none !important;
}

.btn-rounded.btn-danger:hover {
    background: linear-gradient(45deg, #ff4b2b, #ff416c) !important;
}

.container form {
    background-color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 50px;
    height: 100%;
    text-align: center;
}

input {
    background-color: #eee;
    border: none;
    padding: 12px 15px;
    margin: 8px 0;
    width: 100%;
    border-radius: 5px;
}

.container {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 14px 28px rgba(0,0,0,0.25), 
                0 10px 10px rgba(0,0,0,0.22);
    position: relative;
    overflow: hidden;
    width: 768px;
    max-width: 100%;
    min-height: 480px;
}

.form-container {
    position: absolute;
    top: 0;
    height: 100%;
    transition: all 0.6s ease-in-out;
}

.sign-in-container {
    left: 0;
    width: 50%;
    z-index: 2;
}

.container.right-panel-active .sign-in-container {
    transform: translateX(100%);
}

.sign-up-container {
    left: 0;
    width: 50%;
    opacity: 0;
    z-index: 1;
}

.container.right-panel-active .sign-up-container {
    transform: translateX(100%);
    opacity: 1;
    z-index: 5;
    animation: show 0.6s;
}

@keyframes show {
    0%, 49.99% {
        opacity: 0;
        z-index: 1;
    }
    
    50%, 100% {
        opacity: 1;
        z-index: 5;
    }
}

.overlay-container {
    position: absolute;
    top: 0;
    left: 50%;
    width: 50%;
    height: 100%;
    overflow: hidden;
    transition: transform 0.6s ease-in-out;
    z-index: 100;
}

.container.right-panel-active .overlay-container{
    transform: translateX(-100%);
}

.overlay {
    background: #ff416c;
    background: -webkit-linear-gradient(to right, #ff4b2b, #ff416c);
    background: linear-gradient(to right, #ff4b2b, #ff416c);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 0 0;
    color: #ffffff;
    position: relative;
    left: -100%;
    height: 100%;
    width: 200%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.container.right-panel-active .overlay {
    transform: translateX(50%);
}

.overlay-panel {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0 40px;
    text-align: center;
    top: 0;
    height: 100%;
    width: 50%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.overlay-left {
    transform: translateX(-20%);
}

.container.right-panel-active .overlay-left {
    transform: translateX(0);
}

.overlay-right {
    right: 0;
    transform: translateX(0);
}

.container.right-panel-active .overlay-right {
    transform: translateX(20%);
}

.social-container {
    margin: 20px 0;
}

.social-container a {
    border: 1px solid #dddddd;
    border-radius: 50%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin: 0 5px;
    height: 40px;
    width: 40px;
}

/* 提示框样式 */
#toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px 25px;
    border-radius: 5px;
    color: #fff;
    font-size: 14px;
    z-index: 9999;
    display: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

#toast.success {
    background: #4caf50;
}

#toast.error {
    background: #f44336;
}
/* 炫酷发光边框动画 */
.form-container {
    box-shadow: 0 0 40px 10px #ff4b2b88, 0 0 80px 20px #416cff44;
    border: 2px solid #ff4b2b;
    animation: glow 2s infinite alternate;
}
@keyframes glow {
    0% { box-shadow: 0 0 20px #ff4b2b, 0 0 40px #416cff44; }
    100% { box-shadow: 0 0 60px #ff4b2b, 0 0 120px #416cff44; }
}
/* 按钮悬浮炫彩效果 */
button:hover {
    background: linear-gradient(90deg, #ff4b2b, #416cff, #ff416c);
    box-shadow: 0 0 20px #416cff, 0 0 40px #ff4b2b;
    color: #fff;
}
/* 输入框聚焦发光效果 */
input:focus {
    outline: none;
    box-shadow: 0 0 10px #416cff, 0 0 20px #ff4b2b;
    border: 1px solid #416cff;
}
/* 炫酷光圈样式 */
.glow-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    border-radius: 50%;
    box-shadow: 0 0 80px 40px #416cff88, 0 0 120px 60px #ff4b2b44;
    pointer-events: none;
    z-index: 1;
    animation: circleGlow 3s infinite alternate;
}
@keyframes circleGlow {
    0% { box-shadow: 0 0 40px 20px #416cff88, 0 0 60px 30px #ff4b2b44; }
    100% { box-shadow: 0 0 120px 60px #416cff88, 0 0 180px 90px #ff4b2b44; }
}
/* 登录页标签切换 */
.tab-switch {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 16px;
}
.tab {
    border-radius: 20px;
    border: 1px solid #1976d2;
    background: #1976d2;
    color: #fff;
    padding: 10px 24px;
    font-weight: 600;
}
.tab.active {
    background: #0b7dda;
}
.form-wrapper {
    width: 100%;
    padding: 10px 20px 30px;
}
/* 登录容器在小屏占满宽度，避免水平滚动 */
.container {
    width: 100%;
    max-width: 768px;
}

/* 登录页发光圈在小屏缩小尺寸 */
.glow-circle {
    width: 60vw;
    height: 60vw;
    max-width: 360px;
    max-height: 360px;
}

/* 额外的移动端细节优化 */
@media (max-width: 768px) {
    .tab { padding: 8px 16px; }
    .form-wrapper { padding: 10px 12px 24px; }
}

@media (max-width: 768px) {
    body {
        margin: 0;
        height: auto;
        overflow: auto;
    }
    .container {
        width: 100%;
        min-height: 100vh;
        border-radius: 0;
        box-shadow: none;
    }
    form {
        width: 100%;
        padding: 20px;
    }
    input, button {
        width: 100%;
    }
}
/* 去除左右滑动面板在登录页的影响 */
.overlay-container, .overlay { display: none !important; }
.sign-in-container, .sign-up-container { width: 100% !important; left: 0 !important; }
.container.right-panel-active .sign-in-container, .container.right-panel-active .sign-up-container { transform: none !important; }