:root {
    --blue: #0d6efd;
    --blue-dark: #0b3d91;
    --blue-soft: #eef5ff;
    --border: #dbe6f3;
    --text: #1f2a44;
    --muted: #6c7a91;
    --bg: #f4f8fc;
    --sidebar: #ffffff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Sarabun', sans-serif;
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
}

a {
    text-decoration: none;
}

.app-shell {
    min-height: 100vh;
    display: flex;
}

.sidebar {
    width: 278px;
    min-height: 100vh;
    position: fixed;
    inset: 0 auto 0 0;
    background: var(--sidebar);
    border-right: 1px solid var(--border);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    transition: width .2s ease, transform .2s ease;
}

.brand {
    min-height: 90px;
    padding: 18px;
    display: flex;
    gap: 12px;
    align-items: center;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

.brand-logo {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: var(--blue-soft);
    color: var(--blue);
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    overflow: hidden;
}

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

.brand-title {
    font-weight: 700;
    line-height: 1.35;
}

.brand-subtitle {
    color: var(--muted);
    font-size: 12px;
    margin-top: 2px;
}

.brand-text {
    min-width: 0;
}

.sidebar-menu {
    padding: 12px;
    overflow-y: auto;
}

.sidebar-link {
    min-height: 42px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    margin-bottom: 4px;
    border-radius: 8px;
    color: #42526e;
    font-weight: 500;
    white-space: nowrap;
}

.sidebar-link i {
    width: 20px;
    text-align: center;
    color: #6b7c93;
}

.sidebar-link:hover,
.sidebar-link.active {
    background: var(--blue-soft);
    color: var(--blue-dark);
}

.sidebar-link:hover i,
.sidebar-link.active i {
    color: var(--blue);
}

.main {
    margin-left: 278px;
    min-height: 100vh;
    width: calc(100% - 278px);
    transition: margin-left .2s ease, width .2s ease;
}

body.sidebar-collapsed .sidebar {
    width: 76px;
}

body.sidebar-collapsed .main {
    margin-left: 76px;
    width: calc(100% - 76px);
}

body.sidebar-collapsed .brand {
    justify-content: center;
    padding: 14px;
}

body.sidebar-collapsed .brand-text,
body.sidebar-collapsed .sidebar-link span {
    display: none;
}

body.sidebar-collapsed .sidebar-link {
    justify-content: center;
    padding: 10px;
}

.topbar {
    min-height: 72px;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 24px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.topbar h1 {
    font-size: 20px;
    font-weight: 700;
    margin: 0;
}

.topbar-school {
    color: var(--muted);
    font-size: 12px;
    margin-top: 2px;
}

.user-box {
    display: flex;
    align-items: center;
    gap: 14px;
}

.user-name {
    font-weight: 600;
}

.content {
    padding: 24px;
}

.panel {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}

.panel-title {
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 16px;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.panel-header .panel-title {
    margin: 0;
}

.table-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-bar {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
}

.help-list {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
}

.help-list li {
    margin-bottom: 4px;
}

.action-cell {
    width: 1%;
    white-space: nowrap;
}

.advisor-page {
    display: grid;
    gap: 16px;
}

.advisor-grade-stack {
    display: grid;
    gap: 16px;
}

.advisor-grade-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
}

.advisor-grade-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.advisor-grade-header h2 {
    font-size: 18px;
    font-weight: 700;
    margin: 0;
}

.advisor-grade-header p {
    color: var(--muted);
    margin: 2px 0 0;
}

.advisor-room-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
}

.advisor-room-card {
    min-height: 164px;
    width: 100%;
    text-align: left;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    color: var(--text);
    display: flex;
    flex-direction: column;
    gap: 8px;
    appearance: none;
    cursor: pointer;
    transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}

.advisor-room-card:hover,
.advisor-room-card:focus {
    border-color: var(--blue);
    box-shadow: 0 10px 24px rgba(13, 110, 253, .12);
    transform: translateY(-1px);
    outline: none;
}

.room-title {
    font-weight: 700;
    font-size: 16px;
}

.room-plan {
    color: var(--muted);
    min-height: 20px;
    line-height: 1.35;
}

.room-advisors {
    display: grid;
    gap: 5px;
    margin-top: auto;
    max-height: 72px;
    overflow-y: auto;
    padding-right: 2px;
}

.room-advisors span {
    color: #344563;
    line-height: 1.35;
}

.room-advisors span.empty {
    color: var(--muted);
}

.advisor-picker {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
}

.advisor-picker-panel {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    min-height: 460px;
    min-width: 0;
    background: #fff;
}

.advisor-picker-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.advisor-picker-head h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
}

.advisor-picker-head p {
    color: var(--muted);
    margin: 2px 0 0;
}

.teacher-list,
.selected-teacher-list {
    display: grid;
    gap: 8px;
    max-height: 360px;
    overflow-y: auto;
    padding-right: 4px;
}

.teacher-item,
.selected-teacher-item {
    min-height: 58px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: #fff;
    min-width: 0;
}

.teacher-item > div,
.selected-teacher-item > div {
    min-width: 0;
}

.teacher-item.selected {
    border-color: #b8dfc7;
    background: #f1fbf5;
}

.teacher-name {
    font-weight: 600;
    overflow-wrap: anywhere;
}

.teacher-meta {
    color: var(--muted);
    font-size: 12px;
    overflow-wrap: anywhere;
}

.teacher-selected-mark {
    color: #198754;
    font-weight: 600;
    display: none;
    white-space: nowrap;
}

.teacher-item.selected .teacher-add-btn {
    display: none;
}

.teacher-item.selected .teacher-selected-mark {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.selected-empty {
    min-height: 220px;
    border: 1px dashed #b9c9dd;
    border-radius: 8px;
    color: var(--muted);
    display: grid;
    place-items: center;
    text-align: center;
    padding: 18px;
}

.fee-assignment-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.fee-assignment-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 9px 12px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    background: #fff;
    transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}

.fee-assignment-card:hover,
.fee-assignment-card.selected {
    border-color: var(--blue);
    background: #f7fbff;
    box-shadow: 0 8px 20px rgba(13, 110, 253, .10);
}

.fee-card-body {
    min-width: 0;
}

.fee-card-title {
    font-weight: 700;
    overflow-wrap: anywhere;
}

.fee-card-meta {
    color: var(--muted);
    margin-top: 1px;
    line-height: 1.25;
}

.fee-card-amount {
    font-weight: 700;
    color: var(--blue-dark);
    white-space: nowrap;
}

.fee-total-box {
    min-height: 38px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
}

.fee-total-box strong {
    color: var(--blue-dark);
    font-size: 18px;
}

.bulk-section {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    background: #fff;
}

.bulk-section-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.bulk-section-header h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
}

.bulk-section-header p {
    color: var(--muted);
    margin: 2px 0 0;
}

.bulk-room-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 4px;
}

.bulk-room-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: flex-start;
    gap: 9px;
    cursor: pointer;
    background: #fff;
    transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}

.bulk-room-card:hover,
.bulk-room-card.selected {
    border-color: var(--blue);
    background: #f7fbff;
    box-shadow: 0 8px 20px rgba(13, 110, 253, .10);
}

.bulk-room-card strong,
.bulk-room-card small {
    display: block;
    overflow-wrap: anywhere;
}

.bulk-room-card small {
    color: var(--muted);
    margin-top: 2px;
}

.enrollment-picker-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
    min-height: calc(100vh - 250px);
}

.enrollment-picker-panel {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    background: #fff;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.picker-panel-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.picker-panel-head h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
}

.picker-panel-head p {
    color: var(--muted);
    margin: 2px 0 0;
}

.student-picker-list {
    display: grid;
    gap: 5px;
    align-content: start;
    align-items: start;
    grid-auto-rows: max-content;
    overflow-y: auto;
    padding-right: 4px;
    flex: 1 1 auto;
    min-height: 280px;
    max-height: calc(100vh - 360px);
}

.student-picker-item {
    min-height: 32px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 4px 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    background: #fff;
    min-width: 0;
}

.student-picker-item > div {
    min-width: 0;
}

.student-picker-item.selected {
    border-color: #b8dfc7;
    background: #f1fbf5;
}

.student-picker-item.readonly {
    background: #f8fbff;
}

.student-picker-name {
    font-weight: 600;
    font-size: 13px;
    line-height: 1.15;
    overflow-wrap: anywhere;
}

.student-picker-meta {
    color: var(--muted);
    font-size: 11px;
    line-height: 1.1;
    margin-top: 0;
    overflow-wrap: anywhere;
}

.student-picker-item .btn {
    padding: 2px 7px;
    line-height: 1.1;
    white-space: nowrap;
}

.student-picker-list .selected-empty {
    min-height: 32px;
    padding: 4px 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px;
}

.stat-card .icon {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: var(--blue-soft);
    color: var(--blue);
    display: grid;
    place-items: center;
    margin-bottom: 12px;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
}

.stat-label {
    color: var(--muted);
}

.empty-state {
    min-height: calc(100vh - 150px);
    display: grid;
    place-items: center;
    text-align: center;
    background: #fff;
    border: 1px dashed #b9c9dd;
    border-radius: 8px;
    padding: 32px;
}

.empty-state h2 {
    font-size: 22px;
    font-weight: 700;
    margin: 12px 0 6px;
}

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

.empty-icon {
    width: 58px;
    height: 58px;
    border-radius: 8px;
    background: var(--blue-soft);
    color: var(--blue);
    display: grid;
    place-items: center;
    margin: 0 auto;
    font-size: 24px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    display: grid;
    place-items: center;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background:
        linear-gradient(135deg, rgba(13, 110, 253, .13), rgba(255, 255, 255, .85)),
        var(--bg);
}

.login-card {
    width: min(100%, 420px);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 28px;
    box-shadow: 0 20px 50px rgba(31, 42, 68, .12);
}

.login-logo {
    width: 76px;
    height: 76px;
    border-radius: 8px;
    background: var(--blue-soft);
    color: var(--blue);
    display: grid;
    place-items: center;
    margin: 0 auto 16px;
    overflow: hidden;
    font-size: 32px;
}

.login-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.login-title {
    font-size: 20px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4px;
}

.login-school {
    color: var(--muted);
    text-align: center;
    margin-bottom: 22px;
}

.form-label {
    font-weight: 600;
}

.form-control,
.form-select,
.btn {
    font-size: 14px;
    border-radius: 8px;
}

.compact-datatable-page .table,
.compact-datatable-page .dataTables_wrapper,
.compact-datatable-page .dt-container,
.compact-datatable-page .form-control-sm,
.compact-datatable-page .form-select-sm,
.compact-datatable-page .btn-sm {
    font-size: 12px;
}

.payment-status-select.status-paid {
    background-color: #d1e7dd;
    border-color: #a3cfbb;
    color: #0f5132;
}

.payment-status-select.status-partial {
    background-color: #fff3cd;
    border-color: #ffda6a;
    color: #664d03;
}

.payment-status-select.status-unpaid {
    background-color: #f8d7da;
    border-color: #f1aeb5;
    color: #842029;
}

.payment-detail-modal-content {
    background: #fff;
}

.payment-modal-form {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 100%;
    background: #fff;
}

.payment-detail-modal-content > .modal-body,
.payment-modal-form > .modal-body {
    flex: 1 1 auto;
    overflow-y: auto;
}

.payment-detail-modal-content .modal-header,
.payment-detail-modal-content .modal-footer,
.payment-modal-form .modal-header,
.payment-modal-form .modal-footer {
    position: sticky;
    z-index: 5;
    flex-shrink: 0;
    background: #fff;
}

.payment-detail-modal-content .modal-header,
.payment-modal-form .modal-header {
    top: 0;
    box-shadow: 0 8px 18px rgba(15, 23, 42, .06);
}

.payment-detail-modal-content .modal-footer,
.payment-modal-form .modal-footer {
    bottom: 0;
    border-top: 1px solid var(--border);
    box-shadow: 0 -8px 18px rgba(15, 23, 42, .08);
}

.payment-detail-surface {
    background: #f4f8fc;
}

.payment-detail-top {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 12px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 14px;
}

.payment-detail-top > .col-md-2,
.payment-detail-top > .col-md-3,
.payment-detail-top > .col-md-6 {
    width: auto;
}

.payment-detail-top > .col-md-2 {
    grid-column: span 2;
}

.payment-detail-top > .col-md-3 {
    grid-column: span 3;
}

.payment-detail-top > .col-md-6 {
    grid-column: span 6;
}

.payment-detail-items {
    display: grid;
    gap: 8px;
}

.payment-detail-item {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) 150px 150px 110px minmax(260px, .95fr);
    gap: 10px;
    align-items: end;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px;
}

.payment-detail-item .form-label {
    margin-bottom: 4px;
}

.payment-item-name {
    align-self: center;
    min-width: 0;
    overflow-wrap: anywhere;
}

.payment-adjust-check {
    min-height: 38px;
    display: flex;
    align-items: center;
}

.adjustment-fields {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 10px;
}

.student-history-summary {
    display: grid;
    grid-template-columns: 1.1fr 2fr 1fr 1fr;
    gap: 14px;
    align-items: center;
}

.history-summary-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--blue-dark);
}

.logo-preview {
    width: 86px;
    height: 86px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--blue-soft);
    display: grid;
    place-items: center;
    color: var(--blue);
    overflow: hidden;
}

.logo-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sidebar-backdrop {
    display: none;
}

@media (max-width: 991.98px) {
    body.sidebar-collapsed .sidebar {
        width: 278px;
    }

    body.sidebar-collapsed .main,
    .main {
        margin-left: 0;
        width: 100%;
    }

    body.sidebar-collapsed .brand {
        justify-content: flex-start;
        padding: 18px;
    }

    body.sidebar-collapsed .brand-text,
    body.sidebar-collapsed .sidebar-link span {
        display: block;
    }

    body.sidebar-collapsed .sidebar-link {
        justify-content: flex-start;
        padding: 10px 12px;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .sidebar-backdrop.show {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, .45);
        z-index: 1030;
    }

    .topbar {
        padding: 12px 16px;
    }

    .content {
        padding: 16px;
    }

    .user-box {
        gap: 8px;
    }

    .user-box .text-end {
        display: none;
    }

    .stat-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .panel-header {
        align-items: flex-start;
        flex-direction: column;
    }

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

}

@media (max-width: 1399.98px) {
    .advisor-room-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 1199.98px) {
    .advisor-room-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .bulk-room-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .enrollment-picker-grid {
        grid-template-columns: 1fr;
        min-height: 0;
    }

    .student-picker-list {
        max-height: 360px;
    }

    .payment-detail-top {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    .payment-detail-top > .col-md-2,
    .payment-detail-top > .col-md-3,
    .payment-detail-top > .col-md-6 {
        grid-column: span 3;
    }

    .payment-detail-item {
        grid-template-columns: 1fr 140px 140px;
    }

    .student-history-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .adjustment-fields {
        grid-column: 1 / -1;
    }
}

@media (max-width: 991.98px) {

    .advisor-room-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .advisor-picker {
        grid-template-columns: 1fr;
    }

    .bulk-room-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .bulk-section-header {
        flex-direction: column;
    }

    .payment-detail-top,
    .payment-detail-item,
    .adjustment-fields {
        grid-template-columns: 1fr;
    }

    .payment-detail-top > .col-md-2,
    .payment-detail-top > .col-md-3,
    .payment-detail-top > .col-md-6,
    .adjustment-fields {
        grid-column: auto;
    }

}

@media (max-width: 575.98px) {
    .stat-grid {
        grid-template-columns: 1fr;
    }

    .login-card {
        padding: 22px;
    }

    .topbar h1 {
        font-size: 17px;
    }

    .advisor-room-grid {
        grid-template-columns: 1fr;
    }

    .bulk-room-grid {
        grid-template-columns: 1fr;
    }

    .student-history-summary {
        grid-template-columns: 1fr;
    }

}