:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --text: #1e293b;
    --border: #e2e8f0;
    --bg: #f8fafc;
    --shadow: rgba(0, 0, 0, 0.05);
    --success: #16a34a;
    --error: #dc2626;
}

.login-container {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 2rem;
    background: var(--bg);
}

.login-card {
    width: 100%;
    max-width: 28rem;
    padding: 2.5rem;
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 10px 25px var(--shadow);
}

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

.login-logo {
    width: 5rem;
    height: auto;
    margin-bottom: 1.25rem;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
    line-height: 1.25;
}

/* 修正输入框样式 */
.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-group input {
    width: 100%;
    height: 3rem;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 1rem;
    background: white;
    color: var(--text);
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    font-size: 1rem;
    pointer-events: none;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

.form-group input:focus + .input-icon {
    color: var(--primary);
}

.login-button {
    width: 100%;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.login-button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.spinner {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.login-links {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
}

.login-links a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.login-links a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.divider {
    color: var(--border);
    margin: 0 0.75rem;
}

.message {
    margin-top: 1.25rem;
    padding: 0.875rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    text-align: center;
}

.message.success {
    background-color: rgba(22, 163, 74, 0.1);
    color: var(--success);
}

.message.danger {
    background-color: rgba(220, 38, 38, 0.1);
    color: var(--error);
}

.captcha-container {
    margin: 1.5rem 0;
    display: flex;
    justify-content: center;
}

@media (max-width: 640px) {
    .login-card {
        padding: 2rem 1.5rem;
    }

    .login-container {
        padding: 1.5rem;
    }
}
.social-login {
    margin: 20px 0;
    text-align: center;
}

.divider {
    display: flex;
    align-items: center;
    margin: 15px 0;
}

.divider::before,
.divider::after {
    content: "";
    flex: 1;
    border-bottom: 1px solid #e0e0e0;
}

.divider span {
    padding: 0 15px;
    color: #666;
    font-size: 14px;
    background: #fff;
}

.social-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 15px;
}

.social-login-btn.google-btn {
    width: 40px;
    height: 40px;
    background: white;
    border: 1px solid #dadce0;
    border-radius: 50%;
    padding: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-login-btn.google-btn:hover {
    background: #f8f9fa;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border-color: #4285f4;
}

.social-login-btn.google-btn i {
    color: #4285f4;
    font-size: 20px;
}

.telegram-login {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid #e0e0e0;
    background: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.telegram-login:hover {
    background: #f6f9fe;
    border-color: #1a73e8;
}

.telegram-login i {
    font-size: 20px;
    color: #0088cc;
}

.auth-switch {
    display: flex;
    margin: 15px 0;
    border-bottom: 1px solid #eee;
}

.auth-tab {
    flex: 1;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #666;
    position: relative;
}

.auth-tab.active {
    color: #0088cc;
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #0088cc;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.terms-container {
    margin: 15px 0;
    font-size: 14px;
}

.terms-container a {
    color: #0088cc;
    text-decoration: none;
}

.verification-group {
    display: flex;
    gap: 10px;
}

.verification-group input {
    flex: 1;
}

.send-code-btn {
    padding: 8px 15px;
    background-color: #1a73e8;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}

.send-code-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    background-color: #cccccc;
}

.send-code-btn .spinner {
    width: 16px;
    height: 16px;
}

.social-login-btn svg {
    width: 1.25rem; /* 20px */
    height: 1.25rem; /* 20px */
    fill: #64748b;
    transition: fill 0.2s ease;
}

.social-login-btn:hover svg {
    fill: var(--primary);
}

/* --- 添加响应式调整 --- */

/* 平板和较小桌面 (例如 <= 768px) */
@media (max-width: 768px) {
    .login-card {
        padding: 2rem; /* 减小内边距 */
        max-width: 26rem; /* 可选：稍微减小最大宽度 */
    }

    .login-title {
        font-size: 1.375rem; /* 22px */
    }

    .form-group input {
        height: 2.75rem; /* 44px */
        padding: 0.75rem 1rem 0.75rem 2.75rem; /* 调整内边距 */
        font-size: 0.9375rem; /* 15px */
    }

    .input-icon {
        left: 0.875rem; /* 14px */
        font-size: 0.9375rem; /* 15px */
    }

    .login-button,
    .register-button,
    #sendCodeBtn {
        height: 2.75rem; /* 44px */
        font-size: 0.9375rem; /* 15px */
    }

    .verification-code-group {
        gap: 0.5rem; /* 8px */
    }

    #sendCodeBtn {
        padding: 0 0.75rem; /* 12px */
    }

    .social-login-btn {
        width: 2.5rem; /* 40px */
        height: 2.5rem; /* 40px */
    }

    .social-login-btn svg {
        width: 1.125rem; /* 18px */
        height: 1.125rem; /* 18px */
    }
}

/* 手机 (例如 <= 480px) */
@media (max-width: 480px) {
    .login-container {
        padding: 1rem; /* 减小容器边距 */
        min-height: 0; /* 允许内容决定高度 */
        display: block; /* 取消 grid 居中，让卡片自然流动 */
    }

    .login-card {
        padding: 1.5rem; /* 进一步减小内边距 */
        margin-top: 2rem; /* 增加顶部间距 */
        margin-bottom: 2rem; /* 增加底部间距 */
        box-shadow: none; /* 移除阴影 */
        border: 1px solid var(--border); /* 可选：添加边框 */
    }

    .login-header {
        margin-bottom: 1.5rem; /* 24px */
    }

    .login-logo {
        width: 4rem; /* 64px */
        margin-bottom: 1rem; /* 16px */
    }

    .login-title {
        font-size: 1.25rem; /* 20px */
    }

    .auth-tab {
        padding: 0.625rem 0.5rem; /* 10px 8px */
        font-size: 0.9375rem; /* 15px */
        flex-grow: 1; /* 让标签平分宽度 */
        text-align: center;
    }

    .form-group {
        margin-bottom: 1.25rem; /* 20px */
    }

    .form-group input {
        height: 2.75rem; /* 44px */
        font-size: 1rem; /* 确保字体足够大，易于输入 */
    }

    .verification-code-group {
        flex-direction: column; /* 验证码输入框和按钮垂直排列 */
        gap: 0.75rem; /* 12px */
    }



    .login-button,
    .register-button {
        font-size: 1rem; /* 16px */
    }

    .login-links {
        flex-direction: column; /* 链接垂直排列 */
        align-items: center; /* 居中对齐 */
        gap: 0.5rem; /* 8px */
        margin-top: 1.25rem; /* 20px */
    }

    .social-buttons {
        gap: 0.75rem; /* 12px */
    }
}