/* ==========================================================================
   OCSM Theme — design tokens + application shell
   Single source of truth for colors, spacing, typography and layout.
   Page-specific components live in main.css and build on these tokens.
   ========================================================================== */

:root {
    /* Brand / surfaces */
    --ocsm-brand: #2c3e50;
    --ocsm-brand-dark: #1f2d3a;
    --ocsm-brand-light: #3b5268;
    --ocsm-accent: #3498db;
    --ocsm-accent-dark: #2980b9;

    --ocsm-bg: #f5f7fa;
    --ocsm-surface: #ffffff;
    --ocsm-surface-alt: #f8f9fa;

    /* Text */
    --ocsm-text: #333333;
    --ocsm-text-muted: #6b7280;
    --ocsm-text-invert: #ffffff;
    --ocsm-link: #2471a3;

    /* Lines */
    --ocsm-border: #dee2e6;
    --ocsm-border-strong: #c7ced6;

    /* Status */
    --ocsm-success: #27ae60;
    --ocsm-success-dark: #1e8c4d;
    --ocsm-success-soft: #d4edda;
    --ocsm-success-text: #155724;
    --ocsm-danger: #e74c3c;
    --ocsm-danger-dark: #c0392b;
    --ocsm-danger-soft: #f8d7da;
    --ocsm-danger-text: #721c24;
    --ocsm-warning: #e67e22;
    --ocsm-warning-dark: #ca6f1e;
    --ocsm-warning-soft: #fff3cd;
    --ocsm-warning-text: #856404;
    --ocsm-info-soft: #d1ecf1;
    --ocsm-info-text: #0c5460;

    /* Spacing scale */
    --ocsm-space-1: 0.25rem;
    --ocsm-space-2: 0.5rem;
    --ocsm-space-3: 0.75rem;
    --ocsm-space-4: 1rem;
    --ocsm-space-5: 1.5rem;
    --ocsm-space-6: 2rem;

    /* Radii */
    --ocsm-radius-sm: 4px;
    --ocsm-radius: 8px;
    --ocsm-radius-lg: 12px;
    --ocsm-radius-pill: 999px;

    /* Elevation */
    --ocsm-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --ocsm-shadow: 0 2px 6px rgba(16, 24, 40, 0.09);
    --ocsm-shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.14);

    /* Typography */
    --ocsm-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
        Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
    --ocsm-fs-sm: 0.875rem;
    --ocsm-fs-base: 1rem;
    --ocsm-fs-lg: 1.125rem;
    --ocsm-fs-xl: 1.375rem;
    --ocsm-fs-2xl: 1.75rem;

    /* Shell metrics */
    --ocsm-header-h: 56px;
    --ocsm-sidebar-w: 232px;
    --ocsm-content-pad: var(--ocsm-space-5);

    /* Bootstrap alignment so BS components inherit the palette */
    --bs-primary: var(--ocsm-accent);
    --bs-link-color: var(--ocsm-link);
    --bs-body-font-family: var(--ocsm-font);
    --bs-body-color: var(--ocsm-text);
    --bs-border-radius: var(--ocsm-radius-sm);
}

/* --------------------------------------------------------------------------
   Reset & base typography
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--ocsm-font);
    font-size: var(--ocsm-fs-base);
    line-height: 1.55;
    color: var(--ocsm-text);
    background-color: var(--ocsm-bg);
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0 0 var(--ocsm-space-3);
    color: var(--ocsm-brand);
    font-weight: 600;
    line-height: 1.25;
}

h1 {
    font-size: var(--ocsm-fs-2xl);
}

h2 {
    font-size: var(--ocsm-fs-xl);
}

h3 {
    font-size: var(--ocsm-fs-lg);
}

h4,
h5,
h6 {
    font-size: var(--ocsm-fs-base);
}

p {
    margin: 0 0 var(--ocsm-space-4);
}

ul,
ol {
    margin: 0 0 var(--ocsm-space-4);
    padding-left: var(--ocsm-space-6);
}

li {
    margin-bottom: var(--ocsm-space-1);
}

a {
    color: var(--ocsm-link);
    text-decoration: none;
}

a:hover,
a:focus {
    color: var(--ocsm-accent-dark);
    text-decoration: underline;
}

hr,
.hrule {
    border: 0;
    border-top: 1px solid var(--ocsm-border);
    width: 100%;
    margin: var(--ocsm-space-5) 0;
    opacity: 1;
}

:focus-visible {
    outline: 3px solid rgba(52, 152, 219, 0.55);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Application shell: header / sidebar / content / footer
   -------------------------------------------------------------------------- */

.app-header {
    position: sticky;
    top: 0;
    z-index: 1040;
    display: flex;
    align-items: center;
    gap: var(--ocsm-space-3);
    min-height: var(--ocsm-header-h);
    padding: 0 var(--ocsm-space-4);
    background: var(--ocsm-brand);
    color: var(--ocsm-text-invert);
    box-shadow: var(--ocsm-shadow);
}

.app-header__brand {
    display: flex;
    align-items: center;
    gap: var(--ocsm-space-2);
    color: var(--ocsm-text-invert);
    font-size: var(--ocsm-fs-lg);
    font-weight: 600;
    white-space: nowrap;
}

.app-header__brand:hover,
.app-header__brand:focus {
    color: var(--ocsm-text-invert);
    text-decoration: none;
}

.app-header__brand-full {
    display: inline;
}

.app-header__brand-short {
    display: none;
}

.app-header__spacer {
    flex: 1 1 auto;
}

.app-header__user {
    display: flex;
    align-items: center;
    gap: var(--ocsm-space-3);
    font-size: var(--ocsm-fs-sm);
    color: rgba(255, 255, 255, 0.85);
    min-width: 0;
}

.app-header__username {
    color: var(--ocsm-text-invert);
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app-header__action {
    display: inline-flex;
    align-items: center;
    gap: var(--ocsm-space-1);
    padding: var(--ocsm-space-1) var(--ocsm-space-3);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--ocsm-radius-pill);
    background: rgba(255, 255, 255, 0.08);
    color: var(--ocsm-text-invert);
    font: inherit;
    font-size: var(--ocsm-fs-sm);
    line-height: 1.4;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.app-header__action:hover,
.app-header__action:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
    color: var(--ocsm-text-invert);
    text-decoration: none;
}

.app-header__logout-form {
    display: inline;
    margin: 0;
}

/* Hamburger — visible only on small screens */
.sidebar-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    margin: 0;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--ocsm-radius-sm);
    background: transparent;
    color: var(--ocsm-text-invert);
    font-size: 1.25rem;
    cursor: pointer;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
}

.page-container {
    flex: 1 1 auto;
    display: flex;
    align-items: stretch;
    width: 100%;
    min-height: 0;
}

/* Left navigation */
.left-menu {
    flex: 0 0 var(--ocsm-sidebar-w);
    width: var(--ocsm-sidebar-w);
    position: sticky;
    top: var(--ocsm-header-h);
    align-self: flex-start;
    min-height: calc(100vh - var(--ocsm-header-h));
    max-height: calc(100vh - var(--ocsm-header-h));
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: var(--ocsm-space-4) var(--ocsm-space-3);
    background: var(--ocsm-surface);
    border-right: 1px solid var(--ocsm-border);
}

.left-menu h2 {
    margin: 0 0 var(--ocsm-space-3);
    padding: 0 var(--ocsm-space-3);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ocsm-text-muted);
}

.left-menu a {
    display: flex;
    align-items: center;
    gap: var(--ocsm-space-2);
    padding: var(--ocsm-space-2) var(--ocsm-space-3);
    margin-bottom: 2px;
    border-radius: var(--ocsm-radius-sm);
    color: var(--ocsm-text);
    font-size: var(--ocsm-fs-base);
    font-weight: 500;
    text-decoration: none;
    transition: background 0.15s ease, color 0.15s ease;
}

.left-menu a:hover,
.left-menu a:focus {
    background: var(--ocsm-surface-alt);
    color: var(--ocsm-brand);
    text-decoration: none;
}

.left-menu a.is-active {
    background: var(--ocsm-brand);
    color: var(--ocsm-text-invert);
}

.left-menu__divider {
    margin: var(--ocsm-space-4) var(--ocsm-space-3) var(--ocsm-space-3);
    border-top: 1px solid var(--ocsm-border);
}

.left-menu__section-label {
    padding: 0 var(--ocsm-space-3) var(--ocsm-space-2);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ocsm-text-muted);
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1035;
    background: rgba(16, 24, 40, 0.45);
}

/* Content area — grows with the viewport in both directions */
.content {
    flex: 1 1 auto;
    min-width: 0;
    width: 100%;
    max-width: none;
    padding: var(--ocsm-content-pad);
    position: relative;
}

#content-child {
    width: 100%;
}

.app-footer {
    padding: var(--ocsm-space-3) var(--ocsm-space-4);
    background: var(--ocsm-surface);
    border-top: 1px solid var(--ocsm-border);
    color: var(--ocsm-text-muted);
    font-size: var(--ocsm-fs-sm);
    text-align: center;
}

.app-footer p {
    margin: 0;
}

/* Loading overlay */
.spinner-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    background-color: rgba(255, 255, 255, 0.8);
}

/* --------------------------------------------------------------------------
   Shared page components
   -------------------------------------------------------------------------- */

/* Page header bar used at the top of most views */
.content-top-navigation {
    display: block;
    width: 100%;
    margin-bottom: var(--ocsm-space-5);
}

.content-top-navigation .wrapper {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--ocsm-space-3);
    width: 100%;
    padding-bottom: var(--ocsm-space-3);
    border-bottom: 1px solid var(--ocsm-border);
}

.content-top-navigation .left,
.content-top-navigation .right {
    flex: 0 0 auto;
    width: auto;
    display: flex;
    align-items: center;
    gap: var(--ocsm-space-2);
}

.content-top-navigation .center {
    flex: 1 1 260px;
    min-width: 0;
    margin: 0;
    font-size: var(--ocsm-fs-2xl);
    font-weight: 600;
    color: var(--ocsm-brand);
    text-align: center;
    line-height: 1.2;
}

/* Card surface */
.card {
    background: var(--ocsm-surface);
    border: 1px solid var(--ocsm-border);
    border-radius: var(--ocsm-radius);
    box-shadow: var(--ocsm-shadow-sm);
}

.card-title {
    color: var(--ocsm-brand);
}

/* Panel — lightweight card used to group content on a page */
.panel {
    background: var(--ocsm-surface);
    border: 1px solid var(--ocsm-border);
    border-radius: var(--ocsm-radius);
    box-shadow: var(--ocsm-shadow-sm);
    padding: var(--ocsm-space-5);
    margin-bottom: var(--ocsm-space-5);
}

/* Responsive flex row used for tiles, button groups and toolbars */
.tile-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--ocsm-space-5);
    width: 100%;
    margin-bottom: var(--ocsm-space-4);
}

.tile-row--center {
    justify-content: center;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--ocsm-space-2);
    margin-bottom: var(--ocsm-space-4);
}

/* Horizontal scroll container so wide tables stay usable on phones */
.table-scroll {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* --------------------------------------------------------------------------
   Buttons — Bootstrap variants remapped onto the palette
   -------------------------------------------------------------------------- */

.btn {
    --bs-btn-border-radius: var(--ocsm-radius-sm);
    --bs-btn-font-weight: 500;
    min-height: 40px;
}

.btn+.btn {
    margin-left: var(--ocsm-space-2);
}

.btn-primary {
    --bs-btn-bg: var(--ocsm-accent);
    --bs-btn-border-color: var(--ocsm-accent);
    --bs-btn-hover-bg: var(--ocsm-accent-dark);
    --bs-btn-hover-border-color: var(--ocsm-accent-dark);
    --bs-btn-active-bg: var(--ocsm-accent-dark);
    --bs-btn-active-border-color: var(--ocsm-accent-dark);
}

.btn-success {
    --bs-btn-bg: var(--ocsm-success);
    --bs-btn-border-color: var(--ocsm-success);
    --bs-btn-hover-bg: var(--ocsm-success-dark);
    --bs-btn-hover-border-color: var(--ocsm-success-dark);
    --bs-btn-active-bg: var(--ocsm-success-dark);
    --bs-btn-active-border-color: var(--ocsm-success-dark);
}

.btn-danger {
    --bs-btn-bg: var(--ocsm-danger);
    --bs-btn-border-color: var(--ocsm-danger);
    --bs-btn-hover-bg: var(--ocsm-danger-dark);
    --bs-btn-hover-border-color: var(--ocsm-danger-dark);
    --bs-btn-active-bg: var(--ocsm-danger-dark);
    --bs-btn-active-border-color: var(--ocsm-danger-dark);
}

.btn-warning {
    --bs-btn-bg: var(--ocsm-warning);
    --bs-btn-border-color: var(--ocsm-warning);
    --bs-btn-color: #fff;
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--ocsm-warning-dark);
    --bs-btn-hover-border-color: var(--ocsm-warning-dark);
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */

.form-control,
.form-select,
input[type='text'],
input[type='number'],
input[type='email'],
input[type='password'],
input[type='date'],
select,
textarea {
    font-family: inherit;
    font-size: var(--ocsm-fs-base);
}

/* Keep single-line fields readable instead of spanning the whole viewport */
.content .form-control,
.content .form-select {
    max-width: 520px;
}

.content textarea.form-control {
    max-width: 760px;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--ocsm-accent);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.2);
}

label,
.form-label {
    font-weight: 600;
    color: var(--ocsm-brand);
}

/* --------------------------------------------------------------------------
   Tables (plain + DataTables)
   -------------------------------------------------------------------------- */

table {
    border-collapse: collapse;
}

td,
th {
    font-size: var(--ocsm-fs-base);
}

.dataTable,
table.dataTable {
    width: 100% !important;
    background: var(--ocsm-surface);
    border: 1px solid var(--ocsm-border);
    border-radius: var(--ocsm-radius);
    overflow: hidden;
}

.dataTable th,
.dataTable td,
table.dataTable>tbody>tr>td,
table.dataTable>thead>tr>th {
    padding: var(--ocsm-space-3);
    border-bottom: 1px solid var(--ocsm-border);
    vertical-align: middle;
}

.dataTable thead th,
table.dataTable>thead>tr>th {
    background: var(--ocsm-surface-alt);
    color: var(--ocsm-brand);
    font-weight: 600;
    white-space: nowrap;
}

.dataTable tbody tr:hover>td {
    background: var(--ocsm-surface-alt);
}

/* Legacy zebra striping removed in favour of hover rows */
.dataTable tr:not(:first-child):nth-child(odd) {
    background-color: transparent;
}

.statusActive {
    background-color: var(--ocsm-success-soft) !important;
}

.dt-container .dt-search input,
.dt-container .dt-length select {
    border: 1px solid var(--ocsm-border);
    border-radius: var(--ocsm-radius-sm);
    padding: var(--ocsm-space-2) var(--ocsm-space-3);
}

/* Wide tables stay usable on phones */
.dt-container {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.dt-container .dt-paging .dt-paging-button.current {
    background: var(--ocsm-brand) !important;
    border-color: var(--ocsm-brand) !important;
    color: var(--ocsm-text-invert) !important;
}

/* --------------------------------------------------------------------------
   Toasts
   -------------------------------------------------------------------------- */

.toast-container.ocsm-toasts {
    position: fixed;
    top: calc(var(--ocsm-header-h) + var(--ocsm-space-3));
    right: var(--ocsm-space-4);
    left: auto;
    z-index: 1080;
    max-width: min(400px, calc(100vw - 2 * var(--ocsm-space-4)));
}

.toast {
    border-radius: var(--ocsm-radius);
    box-shadow: var(--ocsm-shadow-lg);
}

.toast-header {
    border-top-left-radius: var(--ocsm-radius);
    border-top-right-radius: var(--ocsm-radius);
}

.toast-header--success {
    background-color: var(--ocsm-success);
    color: var(--ocsm-text-invert);
}

.toast-header--error {
    background-color: var(--ocsm-danger);
    color: var(--ocsm-text-invert);
}

.toast-header--success .btn-close,
.toast-header--error .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */

.text-muted-soft {
    color: var(--ocsm-text-muted);
}

.enabledDiv {
    pointer-events: all;
}

.disabledDiv {
    pointer-events: none;
    opacity: 0.55;
}

/* --------------------------------------------------------------------------
   Responsive — tablet & phone
   -------------------------------------------------------------------------- */

@media (max-width: 991.98px) {
    :root {
        --ocsm-content-pad: var(--ocsm-space-4);
    }

    .sidebar-toggle {
        display: inline-flex;
    }

    .app-header__brand-full {
        display: none;
    }

    .app-header__brand-short {
        display: inline;
    }

    .left-menu {
        position: fixed;
        top: var(--ocsm-header-h);
        left: 0;
        bottom: 0;
        z-index: 1036;
        width: min(280px, 82vw);
        flex-basis: auto;
        max-height: none;
        box-shadow: var(--ocsm-shadow-lg);
        transform: translateX(-100%);
        transition: transform 0.22s ease;
    }

    .left-menu a {
        /* Comfortable touch targets on phones and tablets */
        min-height: 44px;
    }

    body.sidebar-open .left-menu {
        transform: translateX(0);
    }

    body.sidebar-open .sidebar-backdrop {
        display: block;
    }

    body.sidebar-open {
        overflow: hidden;
    }

    .content-top-navigation .wrapper {
        gap: var(--ocsm-space-2);
    }

    .content-top-navigation .center {
        flex-basis: 100%;
        order: -1;
        font-size: var(--ocsm-fs-xl);
        text-align: left;
    }
}

@media (max-width: 575.98px) {
    :root {
        --ocsm-content-pad: var(--ocsm-space-3);
    }

    .app-header {
        padding: 0 var(--ocsm-space-3);
    }

    .app-header__user {
        gap: var(--ocsm-space-2);
    }

    .app-header__greeting {
        display: none;
    }

    .content-top-navigation .left,
    .content-top-navigation .right {
        flex: 1 1 100%;
    }

    .tile-row {
        gap: var(--ocsm-space-3);
    }

    .btn+.btn {
        margin-left: 0;
    }

    .toolbar .btn,
    .toolbar button {
        flex: 1 1 140px;
    }
}

/* --------------------------------------------------------------------------
   Print
   -------------------------------------------------------------------------- */

@media print {

    .app-header,
    .app-footer,
    .left-menu,
    .sidebar-backdrop,
    .sidebar-toggle,
    .toast-container,
    .content-top-navigation .left,
    .content-top-navigation .right {
        display: none !important;
    }

    body {
        background: #fff;
    }

    .content {
        padding: 0;
    }

    .panel,
    .card {
        border: 0;
        box-shadow: none;
    }
}