:root {
    --app-bg: #f4f6f9;
    --app-surface: #ffffff;
    --app-text: #1f2937;
    --app-muted: #6c757d;
    --app-border: #dee2e6;
    --app-primary: #0d6efd;
    --app-info: #0dcaf0;
    --app-success: #198754;
    --app-warning: #ffc107;
    --app-danger: #dc3545;
    --app-radius: 12px;
    --app-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

body {
    background: var(--app-bg);
    color: var(--app-text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    margin: 0;
}

.app-shell {
    max-width: 1180px;
    margin-inline: auto;
}

.app-page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.app-page-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.app-page-subtitle {
    margin: .15rem 0 0;
    color: var(--app-muted);
    font-size: .9rem;
}

.app-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: .5rem;
    flex-wrap: wrap;
}

.card,
.login-card,
.module-card,
.status-card,
.loan-block,
.summary .box,
.chart-container {
    border: 0 !important;
    border-radius: var(--app-radius) !important;
    box-shadow: var(--app-shadow) !important;
    background: var(--app-surface) !important;
}

.btn,
button.btn-primary,
button.btn-secondary,
button.btn-success,
button.btn-danger,
button.btn-warning {
    border-radius: 9px;
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    font-weight: 700;
}

.btn-sm {
    min-height: 38px;
}

.btn-touch {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
}

button.btn-primary,
.btn-primary {
    background: var(--app-primary);
    border-color: var(--app-primary);
    color: #fff;
}

button.btn-secondary,
.btn-secondary {
    background: #343a40;
    border-color: #343a40;
    color: #fff;
}

button.btn-success,
.btn-success {
    background: var(--app-success);
    border-color: var(--app-success);
    color: #fff;
}

button.btn-warning,
.btn-warning {
    background: var(--app-warning);
    border-color: var(--app-warning);
    color: #212529;
}

button.btn-danger,
.btn-danger {
    background: var(--app-danger);
    border-color: var(--app-danger);
    color: #fff;
}

.form-control,
.form-select {
    border-radius: 9px;
}

.table {
    vertical-align: middle;
}

.modal-content {
    border: 0;
    border-radius: var(--app-radius);
    box-shadow: 0 12px 32px rgba(0, 0, 0, .18);
}

.module-card .icon-box,
.icon-box {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.module-link {
    color: inherit;
    text-decoration: none;
}

.module-link:focus .module-card,
.module-link:hover .module-card {
    outline: 2px solid var(--app-primary);
    outline-offset: 2px;
}

.app-back-link {
    color: var(--app-primary);
    font-weight: 700;
    text-decoration: none;
}

.app-back-link:hover {
    text-decoration: underline;
}

@media (max-width: 575.98px) {
    .app-page-header {
        align-items: stretch;
    }

    .app-actions,
    .app-actions .btn {
        width: 100%;
    }

    .app-actions .btn {
        justify-content: center;
    }
}