:root {
    --app-bg: #f4f5f7;
    --app-surface: #ffffff;
    --app-surface-muted: #f8f9fb;
    --app-border: #d8dde6;
    --app-border-strong: #c6ced8;
    --app-text: #111827;
    --app-muted: #5f6b7a;
    --app-primary: #204f96;
    --app-primary-dark: #183d73;
    --app-success-bg: #eef6f0;
    --app-success-text: #1f5132;
    --app-warning-bg: #fff7e6;
    --app-warning-text: #7a5316;
    --app-danger-bg: #fff1f0;
    --app-danger-text: #8e2f2b;
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.05);
    --shadow-md: 0 10px 24px rgba(17, 24, 39, 0.05);
    --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html {
    scroll-behavior: smooth;
}

body.app-body {
    margin: 0;
    background: var(--app-bg);
    color: var(--app-text);
    font-family: var(--font-sans);
    line-height: 1.5;
}

a {
    color: var(--app-primary);
    text-decoration: none;
}

a:hover {
    color: var(--app-primary-dark);
}

.app-container {
    width: min(1180px, calc(100% - 2rem));
}

.app-navbar {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(17, 24, 39, 0.08);
}

.navbar-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    color: var(--app-text);
}

.navbar-brand:hover {
    color: var(--app-text);
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 0.85rem;
    border: 1px solid var(--app-border);
    background: var(--app-surface-muted);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.navbar-brand strong {
    font-size: 0.98rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.navbar-brand small {
    font-size: 0.76rem;
}

.section-card {
    background: var(--app-surface);
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem;
}

.hero-card {
    padding: 1.5rem;
}

.hero-title {
    font-size: clamp(1.9rem, 3vw, 2.75rem);
    line-height: 1.08;
    letter-spacing: -0.04em;
    margin: 0;
}

.hero-copy {
    color: var(--app-muted);
    font-size: 1rem;
    max-width: 56rem;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.32rem 0.65rem;
    border-radius: 999px;
    background: var(--app-surface-muted);
    border: 1px solid var(--app-border);
    color: var(--app-muted);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.hero-summary-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.85rem;
}

.hero-summary-list > div {
    background: var(--app-surface-muted);
    border: 1px solid var(--app-border);
    border-radius: var(--radius-md);
    padding: 0.95rem 1rem;
}

.summary-label {
    display: block;
    color: var(--app-muted);
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.hero-summary-list strong {
    display: block;
    margin-top: 0.25rem;
    font-size: 1.2rem;
    letter-spacing: -0.03em;
}

.app-alert {
    border: 1px solid rgba(17, 24, 39, 0.08);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.alert-success.app-alert {
    background: var(--app-success-bg);
    color: var(--app-success-text);
}

.alert-warning.app-alert {
    background: var(--app-warning-bg);
    color: var(--app-warning-text);
}

.alert-secondary.app-alert {
    background: var(--app-surface-muted);
    color: var(--app-text);
}

.section-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.section-header h2 {
    margin: 0;
    font-size: 1.08rem;
    letter-spacing: -0.03em;
}

.section-header p {
    margin: 0.3rem 0 0;
    color: var(--app-muted);
    font-size: 0.92rem;
}

.section-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2rem;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--app-border);
    background: var(--app-surface-muted);
    color: var(--app-muted);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.form-label {
    font-size: 0.84rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.form-control,
.form-select {
    min-height: 2.85rem;
    border-radius: 0.8rem;
    border: 1px solid var(--app-border);
    background: #fff;
    color: var(--app-text);
    padding: 0.7rem 0.85rem;
    box-shadow: none;
}

textarea.form-control {
    min-height: 7.25rem;
    resize: vertical;
}

.form-control::placeholder,
.form-select::placeholder {
    color: #8a95a4;
}

.form-control:focus,
.form-select:focus,
.filter-pill:focus,
.btn-app:focus,
.search-form .form-control:focus {
    border-color: rgba(32, 79, 150, 0.48);
    box-shadow: 0 0 0 0.22rem rgba(32, 79, 150, 0.12);
}

.form-helper {
    color: var(--app-muted);
    font-size: 0.88rem;
}

.btn-app {
    border-radius: 0.8rem;
    padding: 0.7rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    box-shadow: none;
}

.btn-primary.btn-app {
    background: var(--app-primary);
    border-color: var(--app-primary);
}

.btn-primary.btn-app:hover,
.btn-primary.btn-app:focus {
    background: var(--app-primary-dark);
    border-color: var(--app-primary-dark);
}

.btn-outline-secondary.btn-app {
    border-color: var(--app-border-strong);
    color: var(--app-text);
    background: #fff;
}

.btn-outline-secondary.btn-app:hover,
.btn-outline-secondary.btn-app:focus {
    background: var(--app-surface-muted);
    border-color: var(--app-border-strong);
    color: var(--app-text);
}

.priority-card {
    border: 1px solid var(--app-border);
    border-radius: var(--radius-md);
    background: var(--app-surface-muted);
    padding: 1rem;
}

.priority-card-overdue {
    border-color: rgba(142, 47, 43, 0.22);
    background: var(--app-danger-bg);
}

.priority-card h3 {
    margin: 0.25rem 0 0.35rem;
    font-size: 1rem;
    letter-spacing: -0.02em;
}

.priority-card p {
    color: var(--app-muted);
}

.priority-actions,
.table-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.9rem;
}

.empty-state {
    padding: 2.25rem 1.2rem;
    text-align: center;
    border: 1px dashed var(--app-border);
    border-radius: var(--radius-md);
    background: var(--app-surface-muted);
}

.compact-empty-state {
    padding: 1.6rem 1rem;
}

.empty-state h3 {
    margin: 0 0 0.45rem;
    font-size: 1rem;
    letter-spacing: -0.02em;
}

.empty-state p {
    margin: 0;
    color: var(--app-muted);
}

.search-form {
    display: flex;
    gap: 0.65rem;
    width: min(100%, 28rem);
}

.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.filter-pill {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.72rem 0.9rem;
    min-width: 8.75rem;
    border-radius: 0.85rem;
    border: 1px solid var(--app-border);
    color: var(--app-text);
    background: var(--app-surface-muted);
    transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.filter-pill:hover {
    border-color: var(--app-border-strong);
    transform: translateY(-1px);
}

.filter-pill strong {
    font-size: 0.95rem;
    letter-spacing: -0.03em;
}

.filter-pill.is-active {
    background: #eef3fb;
    border-color: rgba(32, 79, 150, 0.2);
    color: var(--app-primary-dark);
}

.app-table {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: transparent;
    --bs-table-hover-bg: rgba(17, 24, 39, 0.03);
    margin-top: 0.25rem;
}

.app-table thead th {
    color: var(--app-muted);
    border-bottom: 1px solid var(--app-border);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    padding: 0.9rem 0.8rem;
    white-space: nowrap;
}

.app-table tbody td {
    border-bottom: 1px solid rgba(17, 24, 39, 0.06);
    padding: 0.95rem 0.8rem;
    vertical-align: middle;
}

.loan-row-overdue {
    background: rgba(255, 241, 240, 0.7);
}

.loan-reference {
    color: var(--app-muted);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 1.9rem;
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    border: 1px solid transparent;
}

.badge-status-active {
    background: #eef4ff;
    color: var(--app-primary-dark);
    border-color: rgba(32, 79, 150, 0.16);
}

.badge-status-overdue {
    background: var(--app-danger-bg);
    color: var(--app-danger-text);
    border-color: rgba(142, 47, 43, 0.18);
}

.badge-status-returned {
    background: var(--app-success-bg);
    color: var(--app-success-text);
    border-color: rgba(31, 81, 50, 0.16);
}

.badge-status-neutral {
    background: var(--app-surface-muted);
    color: var(--app-muted);
    border-color: var(--app-border);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.detail-grid div {
    background: var(--app-surface-muted);
    border: 1px solid var(--app-border);
    border-radius: var(--radius-md);
    padding: 0.9rem 0.95rem;
}

.detail-grid dt {
    margin: 0 0 0.35rem;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--app-muted);
}

.detail-grid dd {
    margin: 0;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
}

.message-preview {
    border: 1px solid var(--app-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    background: var(--app-surface-muted);
    color: var(--app-text);
    white-space: pre-wrap;
}

.timeline-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.85rem;
}

.timeline-list li {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.9rem 0.95rem;
    border: 1px solid var(--app-border);
    border-radius: var(--radius-md);
    background: var(--app-surface-muted);
}

.timeline-list strong {
    font-size: 0.9rem;
    letter-spacing: -0.01em;
}

.timeline-list span {
    color: var(--app-muted);
    font-size: 0.9rem;
}

.loan-detail-summary {
    min-width: min(100%, 20rem);
}

.not-found-card {
    max-width: 42rem;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.toast {
    background: rgba(17, 24, 39, 0.92);
    color: #fff;
    border-radius: 0.9rem;
}

.app-footer {
    color: var(--app-muted);
    font-size: 0.88rem;
    padding: 0 0 1.5rem;
}

.app-footer a {
    font-weight: 600;
}

@media (max-width: 991.98px) {
    .app-container {
        width: min(100% - 1rem, 100%);
    }

    .search-form {
        width: 100%;
        flex-direction: column;
    }

    .detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767.98px) {
    .app-navbar {
        padding-top: 0.7rem;
        padding-bottom: 0.7rem;
    }

    .hero-card,
    .section-card {
        padding: 1rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .app-table thead {
        display: none;
    }

    .app-table,
    .app-table tbody,
    .app-table tr,
    .app-table td {
        display: block;
        width: 100%;
    }

    .app-table tbody tr {
        border: 1px solid rgba(17, 24, 39, 0.08);
        border-radius: var(--radius-md);
        margin-bottom: 0.85rem;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        background: #fff;
    }

    .app-table tbody td {
        padding: 0.85rem 1rem;
        border-bottom: 1px solid rgba(17, 24, 39, 0.05);
    }

    .app-table tbody td:last-child {
        border-bottom: none;
    }

    .table-actions {
        justify-content: flex-start;
    }
}