/* 认证页面样式 - 全屏个性化设计 */

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    background: #0f0f23;
}

/* 背景动画 */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        rgba(102, 126, 234, 0.8) 0%,
        rgba(118, 75, 162, 0.8) 25%,
        rgba(255, 154, 158, 0.8) 50%,
        rgba(250, 208, 196, 0.8) 75%,
        rgba(212, 252, 121, 0.8) 100%
    );
    animation: gradientShift 15s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% {
        opacity: 1;
        transform: translateX(0) translateY(0);
    }
    25% {
        opacity: 0.8;
        transform: translateX(-10px) translateY(-10px);
    }
    50% {
        opacity: 0.9;
        transform: translateX(10px) translateY(10px);
    }
    75% {
        opacity: 0.7;
        transform: translateX(-5px) translateY(5px);
    }
}

/* 浮动形状 */
.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite linear;
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
    animation-duration: 25s;
}

.shape-2 {
    width: 120px;
    height: 120px;
    top: 60%;
    left: 80%;
    animation-delay: -5s;
    animation-duration: 30s;
}

.shape-3 {
    width: 60px;
    height: 60px;
    top: 80%;
    left: 20%;
    animation-delay: -10s;
    animation-duration: 35s;
}

.shape-4 {
    width: 100px;
    height: 100px;
    top: 10%;
    left: 70%;
    animation-delay: -15s;
    animation-duration: 28s;
}

.shape-5 {
    width: 140px;
    height: 140px;
    top: 40%;
    left: 5%;
    animation-delay: -20s;
    animation-duration: 32s;
}

.shape-6 {
    width: 90px;
    height: 90px;
    top: 70%;
    left: 60%;
    animation-delay: -25s;
    animation-duration: 26s;
}

@keyframes float {
    0% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.7;
    }
    33% {
        transform: translateY(-30px) rotate(120deg);
        opacity: 0.4;
    }
    66% {
        transform: translateY(30px) rotate(240deg);
        opacity: 0.8;
    }
    100% {
        transform: translateY(0px) rotate(360deg);
        opacity: 0.7;
    }
}

/* 主容器 */
.auth-container {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* 品牌区域 */
.brand-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.brand-content {
    max-width: 500px;
    text-align: center;
    color: white;
}

.brand-logo {
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out;
}

.brand-logo i {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: block;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s infinite;
}

.brand-logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.brand-tagline {
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.brand-tagline h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.brand-tagline p {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.8;
}

.brand-features {
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.feature-item {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    padding: 0.8rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.feature-item i {
    margin-right: 0.8rem;
    font-size: 1.2rem;
    color: #ffd700;
}

.feature-item span {
    font-weight: 500;
}

/* 推荐语 */
.testimonial {
    animation: fadeInUp 1s ease-out 0.6s both;
}

.testimonial-content {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.testimonial-content p {
    font-style: italic;
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(45deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    color: white;
    font-size: 1.2rem;
}

.author-info {
    text-align: left;
}

.author-name {
    display: block;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.author-title {
    display: block;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* 表单区域 */
.form-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
}

.form-container {
    width: 100%;
    max-width: 480px;
    position: relative;
}

/* 返回首页按钮 */
.back-home {
    display: inline-flex;
    align-items: center;
    color: #666;
    text-decoration: none;
    margin-bottom: 2rem;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.back-home:hover {
    background: #f8f9fa;
    color: #333;
    transform: translateX(-5px);
}

.back-home i {
    margin-right: 0.5rem;
}

/* 认证表单 */
.auth-form {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    animation: slideInRight 0.8s ease-out;
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 0.5rem;
}

.form-header p {
    color: #666;
    font-size: 1rem;
}

/* 登录方式切换 */
.login-tabs {
    display: flex;
    margin-bottom: 2rem;
    background: #f8f9fa;
    border-radius: 12px;
    padding: 0.3rem;
}

.tab-btn {
    flex: 1;
    padding: 0.8rem 1rem;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    color: #666;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tab-btn i {
    margin-right: 0.5rem;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 标签页内容 */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* 步骤指示器 */
.step-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
    position: relative;
}

.step-indicator::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: #e9ecef;
    z-index: 1;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #e9ecef;
    color: #6c757d;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.step.active .step-number {
    background: #667eea;
    color: white;
}

.step.completed .step-number {
    background: #28a745;
    color: white;
}

.step-label {
    font-size: 0.8rem;
    color: #6c757d;
    text-align: center;
}

.step.active .step-label {
    color: #667eea;
    font-weight: 600;
}

/* 步骤内容 */
.step-content {
    display: none;
}

.step-content.active {
    display: block;
    animation: slideInUp 0.5s ease;
}

/* 表单组 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
    font-size: 0.9rem;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group i {
    position: absolute;
    left: 1rem;
    color: #999;
    z-index: 2;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-group input.error {
    border-color: #dc3545;
}

.input-group input.success {
    border-color: #28a745;
}

/* 输入状态指示器 */
.input-status {
    position: absolute;
    right: 1rem;
    font-size: 1.2rem;
}

.input-status.loading::after {
    content: '\f110';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: #667eea;
    animation: spin 1s linear infinite;
}

.input-status.success::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: #28a745;
}

.input-status.error::after {
    content: '\f00d';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: #dc3545;
}

/* 验证码按钮 */
.code-btn {
    position: absolute;
    right: 0.5rem;
    padding: 0.5rem 1rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.code-btn:hover {
    background: #5a6fd8;
}

.code-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* 密码切换按钮 */
.toggle-password {
    position: absolute;
    right: 1rem;
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.toggle-password:hover {
    color: #667eea;
}

/* 密码强度指示器 */
.password-strength {
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: #e9ecef;
    border-radius: 2px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.strength-fill.weak {
    width: 33%;
    background: #dc3545;
}

.strength-fill.medium {
    width: 66%;
    background: #ffc107;
}

.strength-fill.strong {
    width: 100%;
    background: #28a745;
}

.strength-text {
    font-size: 0.8rem;
    color: #666;
    min-width: 80px;
}

/* 表单提示 */
.form-hint {
    font-size: 0.8rem;
    color: #666;
    margin-top: 0.3rem;
}

/* 表单选项 */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* 复选框 */
.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    color: #666;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid #ddd;
    border-radius: 4px;
    margin-right: 0.5rem;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: #667eea;
    border-color: #667eea;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.7rem;
}

/* 单选框组 */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.radio-label {
    display: flex;
    align-items: center;
    padding: 1rem;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.radio-label:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-custom {
    width: 20px;
    height: 20px;
    border: 2px solid #ddd;
    border-radius: 50%;
    margin-right: 1rem;
    position: relative;
    transition: all 0.3s ease;
}

.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: #667eea;
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    width: 10px;
    height: 10px;
    background: #667eea;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.radio-content {
    flex: 1;
}

.radio-content i {
    margin-right: 0.5rem;
    color: #667eea;
}

.radio-content span {
    font-weight: 600;
    color: #333;
}

.radio-content small {
    display: block;
    color: #666;
    margin-top: 0.2rem;
}

.radio-label input[type="radio"]:checked ~ .radio-content {
    color: #667eea;
}

/* 忘记密码链接 */
.forgot-link {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-link:hover {
    color: #5a6fd8;
    text-decoration: underline;
}

/* 提交按钮 */
.submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

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

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

.btn-text {
    transition: opacity 0.3s ease;
}

.btn-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.submit-btn.loading .btn-text {
    opacity: 0;
}

.submit-btn.loading .btn-loader {
    display: block;
}

/* 步骤按钮 */
.step-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.back-btn {
    flex: 1;
    padding: 1rem;
    background: #f8f9fa;
    color: #666;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-btn:hover {
    background: #e9ecef;
    color: #333;
}

.back-btn i {
    margin-right: 0.5rem;
}

.outline-btn {
    padding: 1rem 2rem;
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.outline-btn:hover {
    background: #667eea;
    color: white;
}

/* 第三方登录 */
.social-login {
    margin-top: 2rem;
}

.divider {
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e9ecef;
}

.divider span {
    background: white;
    padding: 0 1rem;
    color: #666;
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

.social-buttons {
    display: flex;
    gap: 1rem;
}

.social-btn {
    flex: 1;
    padding: 0.8rem;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #666;
}

.social-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.social-btn i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.social-btn span {
    font-size: 0.8rem;
    font-weight: 500;
}

.social-btn.wechat:hover {
    border-color: #07c160;
    color: #07c160;
}

.social-btn.qq:hover {
    border-color: #12b7f5;
    color: #12b7f5;
}

.social-btn.weibo:hover {
    border-color: #e6162d;
    color: #e6162d;
}

/* 认证切换 */
.auth-switch {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e9ecef;
    color: #666;
}

.switch-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    margin-left: 0.5rem;
    transition: color 0.3s ease;
}

.switch-link:hover {
    color: #5a6fd8;
    text-decoration: underline;
}

/* 验证信息 */
.verification-info,
.completion-info {
    text-align: center;
    margin-bottom: 2rem;
}

.verification-icon,
.completion-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    animation: pulse 2s infinite;
}

.verification-info h3,
.completion-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.verification-info p,
.completion-info p {
    color: #666;
    line-height: 1.6;
}

/* 协议 */
.agreement {
    margin-bottom: 2rem;
}

.agreement-link {
    color: #667eea;
    text-decoration: none;
}

.agreement-link:hover {
    text-decoration: underline;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideInUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e9ecef;
}

.modal-header h3 {
    margin: 0;
    color: #333;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #999;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: #f8f9fa;
    color: #333;
}

/* 成功模态框 */
.success-modal .modal-content {
    text-align: center;
}

.success-animation {
    margin-bottom: 2rem;
}

.success-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto;
    background: linear-gradient(45deg, #28a745, #20c997);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    animation: successPulse 1s ease-out;
}

.success-content h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #333;
}

.success-content p {
    color: #666;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.success-actions {
    display: flex;
    gap: 1rem;
}

/* 提示消息 */
.success-toast,
.error-toast {
    position: fixed;
    top: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    color: white;
    font-weight: 500;
    z-index: 1001;
    display: flex;
    align-items: center;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    max-width: 400px;
}

.success-toast {
    background: linear-gradient(45deg, #28a745, #20c997);
}

.error-toast {
    background: linear-gradient(45deg, #dc3545, #e74c3c);
}

.success-toast.show,
.error-toast.show {
    transform: translateX(0);
}

.success-toast i,
.error-toast i {
    margin-right: 0.8rem;
    font-size: 1.2rem;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes successPulse {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .auth-container {
        flex-direction: column;
    }
    
    .brand-section {
        min-height: 40vh;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .brand-content {
        max-width: 600px;
    }
    
    .brand-features {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1rem;
    }
    
    .testimonial {
        display: none;
    }
}

@media (max-width: 768px) {
    .auth-container {
        min-height: 100vh;
    }
    
    .brand-section {
        min-height: 30vh;
        padding: 1.5rem;
    }
    
    .brand-logo h1 {
        font-size: 2rem;
    }
    
    .brand-tagline h2 {
        font-size: 1.5rem;
    }
    
    .form-section {
        padding: 1.5rem;
    }
    
    .auth-form {
        padding: 2rem 1.5rem;
    }
    
    .form-header h2 {
        font-size: 1.8rem;
    }
    
    .social-buttons {
        flex-direction: column;
    }
    
    .step-buttons {
        flex-direction: column;
    }
    
    .success-actions {
        flex-direction: column;
    }
    
    .success-toast,
    .error-toast {
        top: 1rem;
        right: 1rem;
        left: 1rem;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .brand-section {
        min-height: 25vh;
        padding: 1rem;
    }
    
    .brand-logo i {
        font-size: 3rem;
    }
    
    .brand-logo h1 {
        font-size: 1.8rem;
    }
    
    .brand-tagline h2 {
        font-size: 1.3rem;
    }
    
    .brand-features {
        grid-template-columns: 1fr;
    }
    
    .form-section {
        padding: 1rem;
    }
    
    .auth-form {
        padding: 1.5rem 1rem;
    }
    
    .form-header h2 {
        font-size: 1.6rem;
    }
    
    .step-indicator {
        margin-bottom: 1.5rem;
    }
    
    .step-label {
        display: none;
    }
    
    .radio-group {
        gap: 0.8rem;
    }
    
    .radio-label {
        padding: 0.8rem;
    }
    
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
    }
}