/* ----- 全局重置 ----- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[hidden] { display: none !important; }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 24px; border-bottom: 1px solid #dce5f0; }
.auth-tabs button { flex: 1; padding: 10px; cursor: pointer; background: transparent; border: 0; border-bottom: 2px solid transparent; color: #4a5a72; font-size: 15px; }
.auth-tabs button.active { border-bottom-color: #1a6dff; color: #1a6dff; font-weight: 600; }
.login-success { background: #f0f9eb; color: #287a16; border-radius: 8px; padding: 12px; margin-bottom: 16px; font-size: 14px; line-height: 1.6; overflow-wrap: anywhere; }
.login-form select { width: 100%; padding: 12px; border: 1.5px solid #dce5f0; border-radius: 8px; background: #fafcff; font-size: 14px; }

:root {
    --primary: #1a6dff;
    --primary-light: #4a8cff;
    --primary-lighter: #e6f0ff;
    --primary-dark: #0a4bbf;
    --sidebar-bg: #0a2540;
    --bg-page: #f5f9ff;
    --border-color: #dce5f0;
    --text-primary: #0a1a2e;
    --text-secondary: #4a5a72;
    --text-light: #8a9ab0;
    --white: #ffffff;
    --danger: #f56c6c;
    --success: #52c41a;
    --radius: 16px;
    --radius-sm: 8px;
    --shadow: 0 8px 40px rgba(10, 37, 64, 0.12);
    --transition: 0.3s ease;
}

body {
    background: var(--bg-page);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* ----- 登录容器 ----- */
.login-container {
    display: flex;
    max-width: 1000px;
    width: 100%;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    min-height: 560px;
}

/* ----- 左侧品牌区（鱼圈特色） ----- */
.login-brand {
    flex: 1.2;
    background: var(--sidebar-bg);
    padding: 48px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: #cddcec;
    position: relative;
    overflow: hidden;
}

.login-brand::after {
    content: '';
    position: absolute;
    top: -40%;
    right: -30%;
    width: 300px;
    height: 300px;
    background: rgba(26, 109, 255, 0.08);
    border-radius: 50%;
    pointer-events: none;
}

.login-brand .brand-icon {
    font-size: 48px;
    color: var(--primary-light);
    background: rgba(255, 255, 255, 0.06);
    width: 72px;
    height: 72px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}

.login-brand h1 {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
    position: relative;
    z-index: 1;
}

.login-brand h1 span {
    color: var(--primary-light);
}

.login-brand .sub {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
    font-weight: 400;
    position: relative;
    z-index: 1;
}

.login-brand .feature-list {
    margin-top: 36px;
    list-style: none;
    position: relative;
    z-index: 1;
}

.login-brand .feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.login-brand .feature-list li:last-child {
    border-bottom: none;
}

.login-brand .feature-list li i {
    color: var(--primary-light);
    font-size: 16px;
    width: 22px;
    text-align: center;
}

/* ----- 右侧登录表单 ----- */
.login-form {
    flex: 1;
    padding: 48px 44px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--white);
}

.login-form .form-header {
    margin-bottom: 32px;
}

.login-form .form-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.login-form .form-header p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

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

.login-form .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.login-form .form-group .input-wrap {
    position: relative;
    display: flex;
    align-items: center;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border var(--transition), box-shadow var(--transition);
    background: #fafcff;
}

.login-form .form-group .input-wrap:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(26, 109, 255, 0.08);
    background: var(--white);
}

.login-form .form-group .input-wrap i {
    padding: 0 14px;
    color: var(--text-light);
    font-size: 15px;
    flex-shrink: 0;
    transition: color var(--transition);
}

.login-form .form-group .input-wrap:focus-within i {
    color: var(--primary);
}

.login-form .form-group .input-wrap input {
    border: none;
    background: transparent;
    padding: 12px 14px 12px 0;
    font-size: 14px;
    width: 100%;
    outline: none;
    color: var(--text-primary);
}

.login-form .form-group .input-wrap input::placeholder {
    color: var(--text-light);
    font-weight: 400;
}

.login-form .form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    font-size: 13px;
}

.login-form .form-options label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    cursor: pointer;
}

.login-form .form-options label input[type="checkbox"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.login-form .form-options a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.login-form .form-options a:hover {
    text-decoration: underline;
}

.login-form .btn-login {
    width: 100%;
    padding: 13px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.login-form .btn-login:hover {
    background: var(--primary-dark);
}

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

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

.login-form .login-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 13px;
    color: var(--text-light);
}

.login-form .login-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.login-form .login-footer a:hover {
    text-decoration: underline;
}

/* ----- 错误提示 ----- */
.login-error {
    background: #fde8e8;
    color: var(--danger);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    display: none;
    margin-bottom: 16px;
    border-left: 3px solid var(--danger);
    align-items: center;
    gap: 8px;
}

.login-error.show {
    display: flex;
}

/* ----- 加载动画 ----- */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* ----- 响应式 ----- */
@media (max-width: 820px) {
    .login-container {
        flex-direction: column;
        max-width: 440px;
        min-height: auto;
    }

    .login-brand {
        padding: 32px 28px;
        align-items: center;
        text-align: center;
    }

    .login-brand .brand-icon {
        margin-bottom: 16px;
    }

    .login-brand .feature-list {
        display: none;
    }

    .login-form {
        padding: 32px 28px;
    }

    .login-form .form-header h2 {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .login-container {
        border-radius: var(--radius-sm);
    }

    .login-brand {
        padding: 24px 20px;
    }

    .login-brand h1 {
        font-size: 22px;
    }

    .login-form {
        padding: 24px 20px;
    }

    .login-form .form-options {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
}

/* ----- 品牌装饰小点 ----- */
.login-brand .deco-dots {
    position: absolute;
    bottom: 24px;
    right: 28px;
    display: flex;
    gap: 8px;
    z-index: 0;
}

.login-brand .deco-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
}

.login-brand .deco-dots span:nth-child(2) {
    background: rgba(255, 255, 255, 0.15);
    width: 8px;
    height: 8px;
}

.login-brand .deco-dots span:nth-child(3) {
    background: rgba(255, 255, 255, 0.05);
}