/* 登录页样式。调整 templates/static 后需同步更新 bin/core/config.py 的 UI_RESOURCE_VERSION。 */
:root {
    --login-card-width: 480px;
    --login-input-height: 52px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif);
    background: linear-gradient(135deg, var(--gray-50, #FAFAFA) 0%, var(--gray-100, #F5F5F5) 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
    position: relative;
    overflow-x: hidden;
}

.login-wrapper {
    width: 100%;
    max-width: var(--login-card-width);
    position: relative;
    z-index: 1;
}

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

.brand-logo {
    width: 80px;
    height: 80px;
    background: var(--white, #fff);
    border-radius: var(--radius-xl, 1.5rem);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    box-shadow: var(--shadow-xl, 0 20px 25px -5px rgba(0, 0, 0, 0.08));
    animation: float 3s ease-in-out infinite;
    overflow: hidden;
    padding: 0.5rem;
}

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.brand-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900, #111827);
    margin-bottom: 0;
    letter-spacing: 0;
}

.login-card {
    background-color: var(--white, #fff);
    border-radius: var(--radius-xl, 1.5rem);
    box-shadow: var(--shadow-xl, 0 20px 25px -5px rgba(0, 0, 0, 0.08));
    padding: 2.5rem;
    border: 1px solid var(--gray-200, #E5E7EB);
    transition: box-shadow var(--transition-base, 250ms cubic-bezier(0.4, 0, 0.2, 1));
}

.login-card:hover {
    box-shadow: 0 25px 35px -5px rgba(0, 0, 0, 0.1);
}

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

.login-icon {
    width: 56px;
    height: 56px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg, 1.25rem);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.75rem;
    color: var(--primary-color, #6366F1);
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900, #111827);
    margin-bottom: 0.5rem;
    letter-spacing: 0;
}

.login-subtitle {
    font-size: 0.875rem;
    color: var(--gray-600, #4B5563);
}

.login-form {
    width: 100%;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700, #374151);
    margin-bottom: 0.5rem;
}

.form-label i {
    color: var(--primary-color, #6366F1);
    margin-right: 0.5rem;
}

.form-control {
    width: 100%;
    min-height: var(--login-input-height);
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 1.5px solid var(--gray-200, #E5E7EB);
    border-radius: var(--radius-lg, 1.25rem);
    transition: border-color var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1)),
                box-shadow var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1));
    background-color: var(--white, #fff);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color, #6366F1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control::placeholder {
    color: var(--gray-400, #9CA3AF);
}

.form-control.is-invalid {
    border-color: var(--danger-color, #EF4444);
    background-image: none;
}

.form-control.is-invalid:focus {
    border-color: var(--danger-color, #EF4444);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.password-field {
    position: relative;
}

.password-field .form-control {
    padding-right: 3.25rem;
}

.password-toggle {
    width: 42px;
    height: 42px;
    position: absolute;
    top: 5px;
    right: 5px;
    border: 0;
    border-radius: var(--radius-md, 0.75rem);
    background: transparent;
    color: var(--gray-500, #6B7280);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1)),
                background-color var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1));
}

.password-toggle:hover,
.password-toggle:focus {
    color: var(--primary-color, #6366F1);
    background-color: rgba(99, 102, 241, 0.08);
    outline: none;
}

.field-message,
.caps-hint {
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    line-height: 1.4;
}

.field-message {
    color: #991B1B;
}

.caps-hint {
    color: #92400E;
}

.caps-hint i {
    margin-right: 0.375rem;
}

.btn-login {
    width: 100%;
    min-height: var(--login-input-height);
    padding: 0.875rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--white, #fff);
    background: linear-gradient(135deg, var(--primary-color, #6366F1), var(--secondary-color, #8B5CF6));
    border: none;
    border-radius: var(--radius-lg, 1.25rem);
    cursor: pointer;
    transition: transform var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1)),
                box-shadow var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1));
    box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.08));
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl, 0 20px 25px -5px rgba(0, 0, 0, 0.08));
}

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

.btn-login:disabled {
    cursor: not-allowed;
    opacity: 0.82;
    transform: none;
}

.session-policy {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    color: var(--gray-600, #4B5563);
    font-size: 0.8125rem;
    margin: 0.875rem 0 0;
    text-align: center;
}

.session-policy i {
    color: var(--primary-color, #6366F1);
}

.btn-reset {
    width: 100%;
    padding: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700, #374151);
    background-color: transparent;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1));
    margin-top: 0.75rem;
    text-decoration: none;
    display: inline-block;
}

.btn-reset:hover,
.btn-reset:focus {
    color: var(--primary-color, #6366F1);
    outline: none;
}

.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg, 1.25rem);
    border: 1.5px solid;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.05);
    border-color: rgba(16, 185, 129, 0.2);
    color: #065F46;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.05);
    border-color: rgba(239, 68, 68, 0.2);
    color: #991B1B;
}

.btn-close {
    margin-left: auto;
}

.login-footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--gray-600, #4B5563);
    font-size: 0.875rem;
}

.modal-content {
    border-radius: var(--radius-xl, 1.5rem);
    border: none;
    box-shadow: var(--shadow-xl, 0 20px 25px -5px rgba(0, 0, 0, 0.08));
}

.modal-header {
    border-bottom: 1px solid var(--gray-200, #E5E7EB);
    padding: 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--gray-200, #E5E7EB);
    padding: 1.5rem;
}

.close-btn-custom {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-600, #4B5563);
    cursor: pointer;
    transition: color var(--transition-fast, 150ms cubic-bezier(0.4, 0, 0.2, 1));
}

.close-btn-custom:hover,
.close-btn-custom:focus {
    color: var(--gray-900, #111827);
    outline: none;
}