* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

:root {
    --primary-color: #42b983;
    --secondary-color: #35495e;
    --error-color: #ff6b6b;
    --success-color: #42b983;
    --background-color: #f4f5f7;
    --text-color: #2c3e50;
    --border-color: #e4e7ed;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--background-color);
    min-height: 100vh;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-color);
}

.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    padding: 20px;
    text-align: center;
    background: linear-gradient(135deg, #42b983 0%, #35495e 100%);
    color: white;
    position: relative;
}

.wave-container {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    transform: rotate(180deg);
}

.wave-container svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 46px;
}

.wave-container .shape-fill {
    fill: var(--background-color);
}

.header h1 {
    font-size: 24px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.header .logo-icon {
    font-size: 28px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.main-content {
    flex: 1;
    padding: 20px;
    margin-top: 40px;  /* 增加顶部边距 */
    display: flex;     /* 添加flex布局 */
    align-items: center;  /* 垂直居中 */
    min-height: calc(100vh - 250px);  /* 确保有足够的空间进行居中 */
}

.login-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

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

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

.input-container {
    position: relative;
}

.form-control {
    width: 100%;
    height: 48px;
    padding: 12px 16px;
    font-size: 16px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s;
    background: #f8f9fa;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(66, 185, 131, 0.1);
}

.input-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 18px;
}

.btn {
    width: 100%;
    height: 48px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.btn-github {
    background: #24292e;
    color: white;
    margin-top: 12px;
}

.btn:active {
    transform: scale(0.98);
}

.btn.disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.verification-group {
    display: grid;
    grid-template-columns: 1fr 1fr;  /* 将空间平均分成两列 */
    gap: 8px;
}

.verification-input {
    width: 100%;  /* 让输入框占满其列宽 */
}

.btn-send-code {
    width: 100%;  /* 让按钮占满其列宽 */
    background: linear-gradient(135deg, #00b4db 0%, #0083b0 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 180, 219, 0.2);
}

.btn-send-code:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 180, 219, 0.3);
    background: linear-gradient(135deg, #00c6db 0%, #0095b0 100%);
}

.btn-send-code:disabled {
    background: linear-gradient(135deg, #b0b0b0 0%, #8c8c8c 100%);
    cursor: not-allowed;
    box-shadow: none;
}

.tab-group {
    display: flex;
    margin-bottom: 20px;
    background: #f8f9fa;
    padding: 4px;
    border-radius: 12px;
}

.tab {
    flex: 1;
    padding: 10px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s;
}

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

.message {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.error-message {
    background: rgba(255, 107, 107, 0.1);
    color: var(--error-color);
}

.success-message {
    background: rgba(66, 185, 131, 0.1);
    color: var(--success-color);
}

.footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 12px;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 适配暗色模式 */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #1a1a1a;
        --text-color: #e0e0e0;
        --border-color: #333;
    }

    .login-card {
        background: #242424;
    }

    .form-control {
        background: #333;
        color: #e0e0e0;
    }

    .form-control:focus {
        background: #404040;
    }

    .tab-group {
        background: #333;
    }

    .message {
        background: rgba(0, 0, 0, 0.2);
    }
}

.forgot-password-link {
    display: block;
    text-align: center;
    margin-top: 16px;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

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

/* 模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.modal-overlay.show {
    display: flex;
}

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

.modal {
    background: white;
    border-radius: 16px;
    padding: 24px;
    max-width: 400px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
}

.modal-close:hover {
    background: #f5f5f5;
    color: var(--text-color);
}

.modal-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
    position: relative;
}

.modal-steps::before {
    content: '';
    position: absolute;
    top: 16px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--border-color);
    z-index: 1;
}

.modal-steps .progress-line {
    position: absolute;
    top: 16px;
    left: 16px;
    height: 2px;
    background: var(--primary-color);
    z-index: 2;
    transition: width 0.5s ease;
    width: 0;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
    z-index: 3;
}

.step-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: #999;
    transition: all 0.3s;
}

.step.active .step-circle {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

.step.completed .step-circle {
    border-color: var(--success-color);
    background: var(--success-color);
    color: white;
}

.step-label {
    font-size: 12px;
    color: #999;
    margin-top: 8px;
    text-align: center;
}

.step.active .step-label,
.step.completed .step-label {
    color: var(--text-color);
}

.reset-step {
    display: none;
}

.reset-step.active {
    display: block;
}

.step-description {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    color: #666;
    margin-bottom: 16px;
}

.modal-actions {
    display: flex;
    gap: 12px;
}

.btn-secondary {
    background: #f5f5f5;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-modal {
    height: 44px;
    border-radius: 8px;
    font-size: 14px;
    flex: 1;
}