/**
 * 登录 / 注册页样式（原 Tailwind 工具类迁移为语义化 class）。
 */
.auth-page {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, #f1f5f9 0%, #eef2ff 50%, #f1f5f9 100%);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.auth-main {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    max-width: 72rem;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.auth-card {
    display: grid;
    width: 100%;
    max-width: 56rem;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    border-radius: 1rem;
    background: #fff;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
    .auth-card {
        grid-template-columns: 1fr 1.2fr;
    }
}

.auth-brand {
    display: none;
    padding: 2rem;
    color: #fff;
    background: linear-gradient(135deg, #4f46e5 0%, #3730a3 100%);
}

@media (min-width: 768px) {
    .auth-brand {
        display: block;
    }
}

.auth-brand-logo-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 5rem;
    height: 5rem;
    margin-bottom: 1.25rem;
    padding: 0.5rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.auth-brand-logo-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.auth-brand-tag {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #c7d2fe;
}

.auth-brand-title {
    margin: 0.75rem 0 0;
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.375;
}

.auth-brand-meta {
    margin: 0.5rem 0 0;
    font-size: 0.75rem;
    color: rgba(199, 210, 254, 0.9);
}

.auth-brand-desc {
    margin: 1rem 0 0;
    font-size: 0.875rem;
    color: rgba(224, 231, 255, 0.9);
}

.auth-brand-copy {
    margin: 0.75rem 0 0;
    font-size: 0.75rem;
    color: rgba(199, 210, 254, 0.9);
}

.auth-panel {
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .auth-panel {
        padding: 2rem;
    }
}

.auth-mobile-header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .auth-mobile-header {
        display: none;
    }
}

.auth-mobile-logo {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    padding: 0.25rem;
    border-radius: 0.75rem;
    background: #eef2ff;
    box-shadow: 0 0 0 1px #e0e7ff;
}

.auth-mobile-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.auth-mobile-title-wrap {
    min-width: 0;
}

.auth-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
}

.auth-subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.875rem;
    color: #64748b;
}

.auth-desktop-subtitle {
    display: none;
}

@media (min-width: 768px) {
    .auth-desktop-subtitle {
        display: block;
    }
}

.auth-tab-bar {
    display: flex;
    margin-top: 1.25rem;
    padding: 0.25rem;
    border-radius: 0.75rem;
    background: #f1f5f9;
    font-size: 0.875rem;
}

.auth-tab {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: 0.5rem;
    background: transparent;
    font-size: inherit;
    font-weight: 500;
    color: #64748b;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.auth-tab--active {
    background: #fff;
    color: #334155;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.auth-form {
    margin-top: 1rem;
}

.auth-form > * + * {
    margin-top: 1rem;
}

.auth-field-group > * + * {
    margin-top: 0.75rem;
}

.auth-field {
    display: block;
}

.auth-label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    color: #334155;
}

.auth-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.auth-input:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

.auth-captcha-row {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 0.5rem;
}

.auth-captcha-box {
    padding: 0.25rem;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    background: #f8fafc;
}

.auth-captcha-box img {
    display: block;
    width: 8rem;
    height: 2.5rem;
    border: 1px solid #cbd5e1;
    border-radius: 0.375rem;
    background: #fff;
    object-fit: contain;
    cursor: pointer;
}

.auth-code-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
}

.auth-btn-secondary {
    margin-top: 1.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid #c7d2fe;
    border-radius: 0.5rem;
    background: #eef2ff;
    font-size: 0.875rem;
    font-weight: 500;
    color: #4338ca;
    cursor: pointer;
    transition: background 0.15s;
}

.auth-btn-secondary:hover:not(:disabled) {
    background: #e0e7ff;
}

.auth-btn-secondary:disabled {
    border-color: #e2e8f0;
    background: #f1f5f9;
    color: #94a3b8;
    cursor: not-allowed;
}

.auth-remember {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #475569;
    cursor: pointer;
}

.auth-remember input {
    width: 1rem;
    height: 1rem;
    border-radius: 0.25rem;
    border: 1px solid #cbd5e1;
}

.auth-btn-primary {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: none;
    border-radius: 0.5rem;
    background: #4f46e5;
    font-size: 0.875rem;
    font-weight: 500;
    color: #fff;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    transition: background 0.15s;
}

.auth-btn-primary:hover {
    background: #4338ca;
}

.auth-footer {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    text-align: center;
    color: #475569;
}

.auth-footer a {
    font-weight: 500;
    color: #4f46e5;
    text-decoration: none;
}

.auth-footer a:hover {
    color: #4338ca;
}

.auth-alert {
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    border: 1px solid;
    font-size: 0.875rem;
}

.auth-alert--success {
    border-color: #a7f3d0;
    background: #ecfdf5;
    color: #047857;
}

.auth-alert--error {
    border-color: #fecdd3;
    background: #fff1f2;
    color: #be123c;
}