:root {
    /* Background colors */
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-card: #1e2130;
    --bg-input: #252838;
    --bg-hover: #2a2d3e;

    /* Text colors */
    --text-primary: #e4e6f0;
    --text-secondary: #8b8fa3;
    --text-muted: #949ab0;

    /* Accent colors */
    --accent-primary: #6366f1;
    --accent-primary-hover: #818cf8;
    --accent-success: #22c55e;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #3b82f6;

    /* Border */
    --border-color: #2a2d3e;
    --border-radius: 8px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
}

/* Base */
html, body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    margin: 0;
    min-height: 100vh;
}

/* Page layout */
.page {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    overflow-y: auto;
    z-index: 100;
}

main {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
}

.content {
    padding: 2rem;
}

/* Cards */
.card, .bg-dark-card {
    --bs-card-color: var(--text-primary);
    --bs-card-title-color: var(--text-primary);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.card-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* Forms */
.form-control, .form-select {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-input);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 0.35rem;
}

.form-check-input {
    background-color: var(--bg-input);
    border-color: var(--border-color);
}

.form-check-input:checked {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.form-control:disabled,
.form-control[readonly],
.form-select:disabled {
    background-color: var(--bg-primary) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
    border-style: dashed !important;
    opacity: 0.75;
    cursor: not-allowed;
}

.form-check-label {
    color: var(--text-primary);
}

.form-check-inline .form-check-label {
    color: var(--text-primary);
}

.report-grouping-option {
    color: var(--text-primary);
}

/* Buttons */
.btn-primary {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    font-weight: 500;
    border-radius: 6px;
    padding: 0.5rem 1.25rem;
    transition: all 0.2s;
}

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    border-color: var(--accent-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background-color: var(--accent-danger);
    border-color: var(--accent-danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
    border-color: #dc2626;
}

.btn-warning {
    background-color: var(--accent-warning);
    border-color: var(--accent-warning);
    color: #1a1d27;
}

.btn-success {
    background-color: var(--accent-success);
    border-color: var(--accent-success);
    color: white;
}

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline-secondary:hover {
    background-color: var(--bg-hover);
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.8125rem;
}

/* Searchable model selection */
.model-combobox {
    position: relative;
}

.model-combobox-toggle {
    width: 100%;
    min-height: calc(1.5em + 1rem + 2px);
    text-align: left;
}

.model-dropdown-backdrop {
    position: fixed;
    z-index: 29;
    inset: 0;
    background: transparent;
}

.model-dropdown {
    position: absolute;
    z-index: 30;
    top: calc(100% + 6px);
    right: 0;
    left: 0;
    max-height: 360px;
    padding: 6px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
}

.model-dropdown-search {
    position: sticky;
    z-index: 1;
    top: 0;
    margin-bottom: 6px;
}

.model-dropdown-item {
    width: 100%;
    margin: 0;
    padding: 10px 12px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--text-primary);
    text-align: left;
    overflow-wrap: anywhere;
}

.model-dropdown-item:hover,
.model-dropdown-item.is-selected,
.model-dropdown-item.is-highlighted {
    background: var(--bg-hover);
    color: var(--accent-primary-hover);
}

.model-dropdown-item:disabled {
    color: var(--text-muted);
    cursor: not-allowed;
}

.model-dropdown-empty {
    margin: 0;
    padding: 14px 12px;
    color: var(--text-secondary);
}

/* Tables */
.table {
    color: var(--text-primary);
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-primary);
    --bs-table-striped-bg: rgba(255, 255, 255, 0.03);
    --bs-table-striped-color: var(--text-primary);
    --bs-table-hover-bg: rgba(255, 255, 255, 0.05);
    --bs-table-hover-color: var(--text-primary);
}

.table thead th {
    background-color: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.75rem;
}

.table td,
.table th {
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem;
    vertical-align: middle;
}

.table tbody tr {
    color: var(--text-primary);
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: var(--bs-table-striped-bg);
    color: var(--text-primary);
}

.table-striped > tbody > tr:nth-of-type(even) > * {
    color: var(--text-primary);
}

/* Alerts */
.alert-danger {
    background-color: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-success {
    background-color: rgba(34, 197, 94, 0.15);
    border-color: rgba(34, 197, 94, 0.3);
    color: #86efac;
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.3);
    color: #fcd34d;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

/* NavMenu */
.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary) !important;
    padding: 1.25rem 1rem;
}

.nav-section-title {
    color: var(--text-muted);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 1rem 1rem 0.35rem;
    margin-top: 0.5rem;
}

.nav-link {
    color: var(--text-secondary) !important;
    padding: 0.5rem 1rem !important;
    border-radius: 6px;
    margin: 1px 0.5rem;
    font-size: 0.875rem;
    transition: all 0.15s;
}

.nav-link:hover {
    color: var(--text-primary) !important;
    background-color: var(--bg-hover);
}

.nav-link.active {
    color: white !important;
    background-color: var(--accent-primary) !important;
}

/* Login page */
.login-page {
    background-color: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    width: 100%;
}

.login-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

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

.login-header h1 {
    color: var(--accent-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.login-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Top row */
.top-row {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    height: 50px;
    padding: 0 1.5rem;
}

.top-row a, .top-row .btn-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
}

.top-row a:hover, .top-row .btn-link:hover {
    color: var(--text-primary);
}

/* Badges */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.25em 0.65em;
    border-radius: 4px;
}

.badge.bg-primary { background-color: var(--accent-primary) !important; }
.badge.bg-success { background-color: var(--accent-success) !important; }
.badge.bg-danger { background-color: var(--accent-danger) !important; }
.badge.bg-warning { background-color: var(--accent-warning) !important; color: #1a1d27 !important; }

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-muted);
}

/* Modal */
.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
}

.btn-close {
    filter: invert(1);
}

/* Dropdown */
.dropdown-menu {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
}

.dropdown-item {
    color: var(--text-primary);
}

.dropdown-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

/* Selection */
::selection {
    background-color: rgba(99, 102, 241, 0.4);
}

/* Spinner */
.spinner-border {
    color: var(--accent-primary);
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
}

/* Horizontal rule */
hr {
    border-color: var(--border-color);
    opacity: 1;
}

/* Text utilities */
.text-muted {
    color: var(--text-muted) !important;
}

/* Blazor error UI */
#blazor-error-ui {
    background: var(--accent-danger);
    color: white;
    bottom: 0;
    box-shadow: var(--shadow-lg);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

/* Active timer list & cards */
.timer-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.timer-card {
    border-left: 4px solid var(--accent-primary);
    background: var(--bg-secondary, #1e2130);
}

.timer-add-btn {
    border-style: dashed !important;
    width: auto;
    padding: 0.6rem 1.5rem;
}

.timer-new-panel {
    border: 1px solid var(--border-color, #333);
}

/* Suggestion dropdown (e.g. Trello card search) — explicit colors so the text
   stays readable regardless of Bootstrap cascade order or browser defaults. */
.suggestion-dropdown {
    background: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
}

.suggestion-dropdown .suggestion-item {
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.suggestion-dropdown .suggestion-item:hover {
    background: var(--bg-hover);
}

/* Responsive shell and shared presentation; business state stays in one DOM. */
main, .content, .card, .card-body, .flex-grow-1, .input-group {
    min-width: 0;
}

.content, .modal-content, .responsive-dialog {
    overflow-wrap: anywhere;
}

.header-user {
    color: var(--text-secondary);
    font-size: .875rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mobile-menu-toggle, .mobile-menu-close, .mobile-brand, .navigation-backdrop, .compact-only {
    display: none;
}

.responsive-dialog {
    width: min(var(--dialog-width, 40rem), calc(100vw - 1.5rem));
    min-width: 0;
    max-width: calc(100vw - 1.5rem);
    max-height: calc(100dvh - 1.5rem);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.modal-dialog {
    max-width: calc(100vw - 1rem);
}

@media (min-width: 576px) {
    .modal-dialog { max-width: min(var(--bs-modal-width, 500px), calc(100vw - 2rem)); }
}

.modal-content { max-height: calc(100dvh - 2rem); }
.modal-body { overflow-y: auto; overscroll-behavior: contain; }
.modal-header, .modal-footer { flex-shrink: 0; }
.modal-header .modal-title { min-width: 0; }
.modal-header .btn-close { flex-shrink: 0; }
.modal-footer { gap: .5rem; }
.mobile-toolbar { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }
.mobile-card-actions { white-space: normal !important; }
.mobile-card-actions .btn { margin-block: .125rem; }
.responsive-form { width: min(var(--form-width, 100%), 100%); }
.responsive-overlay { padding: .75rem; }
.mobile-project-editor { min-width: 220px; }
.mobile-time-input { width: 110px; }
.mobile-description { max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.suggestion-item { display: block; width: 100%; border: 0; background: transparent; text-align: left; }
.suggestion-backdrop { position: fixed; inset: 0; z-index: 101; background: transparent; border: 0; cursor: default; }
.trello-selection.suggestions-open { position: relative; z-index: 102; }
.calendar-week-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; }
.calendar-month-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 4px; }
.calendar-month-day { color: var(--text-primary); text-align: left; }
.calendar-entry { display: block; width: 100%; background: var(--bg-input); color: var(--text-primary); text-align: left; border: 0; border-left: 3px solid var(--accent-primary); border-radius: 4px; font-size: .6875rem; }
.calendar-more { border: 0; background: transparent; color: var(--accent-primary-hover); text-align: left; padding: .5rem 0; }
.calendar-month-day { padding: 0; }
.calendar-month-day > div { width: 100%; min-width: 0; }
.calendar-month-day:disabled { cursor: default; }
.weekly-chart > div { min-width: 0; flex: 1 1 0 !important; height: 100%; justify-content: flex-end; }

@media (max-width: 991.98px) {
    main { margin-left: 0; width: 100%; }
    .sidebar {
        width: min(300px, calc(100vw - 3rem));
        z-index: 1040;
        transform: translateX(-100%);
        visibility: hidden;
        padding-bottom: env(safe-area-inset-bottom);
        overscroll-behavior: contain;
    }
    .sidebar.is-open { transform: translateX(0); visibility: visible; }
    .sidebar > .top-row { padding-right: 3rem; justify-content: flex-start; }
    .sidebar .navbar-brand { padding-left: 0; }
    .mobile-menu-close {
        display: inline-flex;
        position: absolute;
        right: .5rem;
        top: .25rem;
        z-index: 1;
        align-items: center;
        justify-content: center;
    }
    .app-header {
        position: sticky;
        top: 0;
        z-index: 200;
        height: auto;
        min-height: 60px;
        gap: .5rem;
        padding: .5rem max(.75rem, env(safe-area-inset-right)) .5rem max(.75rem, env(safe-area-inset-left)) !important;
    }
    .mobile-menu-toggle { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
    .mobile-brand { display: block; margin-right: auto; color: var(--accent-primary-hover) !important; font-weight: 700; }
    .header-user { max-width: 12rem; }
    .language-switcher { flex-shrink: 0; }
    .navigation-backdrop.is-visible { display: block; position: fixed; inset: 0; background: #0009; z-index: 1039; }
    body.navigation-open { overflow: hidden; }
    .nav-link, .btn, .btn-close { min-height: 44px; }
    .btn { min-width: 44px; }
    .report-grouping-label { min-height: 44px; }
    .report-grouping-label input { width: 20px; height: 20px; flex-shrink: 0; }
    .btn-close, .mobile-menu-toggle, .mobile-menu-close { min-width: 44px; }
    .nav-link { display: flex; align-items: center; }
    .form-control, .form-select { min-height: 44px; font-size: 1rem; }
    .form-check { min-height: 44px; display: flex; align-items: center; gap: .5rem; }
    .form-check-input { flex-shrink: 0; width: 1.25em; height: 1.25em; }
    .form-check-label { padding-block: .5rem; }
    .content { padding: 1rem !important; }
}

@media (max-width: 767.98px) {
    .header-user { display: none; }
    .content { padding: .75rem !important; padding-bottom: max(.75rem, env(safe-area-inset-bottom)) !important; }
    .content .card.p-4, .responsive-dialog.p-4 { padding: 1rem !important; }
    .card-body { padding: 1rem; }
    .login-container { padding: 1rem; min-height: 100dvh; }
    .login-card { padding: 1.25rem; margin-block: auto; }
    .login-page { min-height: 100dvh; }
    .timer-card .timer-clock { font-size: 1.75rem !important; }
    .timer-add-btn { width: 100%; }
    .compact-only { display: block !important; }
    .mobile-toolbar > .btn, .modal-footer > .btn { flex: 1 1 auto; }
    .modal-dialog { margin: .5rem; }
    .modal-content { max-height: calc(100dvh - 1rem); }
    .modal-header, .modal-body, .modal-footer { padding: 1rem; }
    .modal-footer .btn { white-space: normal; }
    .model-dropdown { max-height: min(360px, 50dvh); }
    .suggestion-item { min-height: 44px; white-space: normal; overflow-wrap: anywhere; }
    .input-group { max-width: 100%; }

    /* Keep one set of controls and bindings when a table becomes a card list. */
    .table-responsive:has(> .mobile-cards) { overflow: visible; }
    .mobile-cards { display: block; width: 100%; }
    .mobile-cards > thead {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip-path: inset(50%);
        white-space: nowrap;
    }
    .mobile-cards > tbody, .mobile-cards > tfoot { display: block; width: 100%; }
    .mobile-cards > tbody > tr, .mobile-cards > tfoot > tr {
        display: block;
        margin: .75rem;
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius);
        background: var(--bg-card);
        padding: .5rem;
    }
    .mobile-cards > tbody > tr > td, .mobile-cards > tfoot > tr > td,
    .mobile-cards > tbody > tr > th, .mobile-cards > tfoot > tr > th {
        display: block;
        width: 100% !important;
        min-width: 0 !important;
        max-width: none !important;
        height: auto;
        padding: .5rem;
        text-align: left !important;
        white-space: normal !important;
        overflow: visible !important;
        overflow-wrap: anywhere;
        border-bottom: 0;
    }
    .mobile-cards > tbody > tr > td[data-label]::before,
    .mobile-cards > tfoot > tr > td[data-label]::before {
        content: attr(data-label);
        display: block;
        margin-bottom: .25rem;
        font-size: .8125rem;
        font-weight: 600;
        color: var(--text-secondary);
    }
    .mobile-cards > tbody > tr > td.mobile-card-section::before,
    .mobile-cards > tbody > tr > td.mobile-card-empty::before { display: none; }
    .mobile-cards > tbody > tr.mobile-card-section { padding: 0; border: 0; margin: .75rem 0; }
    .mobile-cards > tbody > tr > td.mobile-card-section { padding: 0; }
    .mobile-cards .mobile-cards > tbody > tr { margin-inline: 0; }
    .mobile-cards input:not([type=checkbox]):not([type=radio]), .mobile-cards select, .mobile-cards textarea,
    .mobile-cards .input-group { width: 100% !important; min-width: 0 !important; max-width: 100% !important; }
    .mobile-cards .input-group > .form-control { width: 1% !important; }
    .mobile-cards .d-flex { flex-wrap: wrap; }
    .mobile-cards .text-truncate { white-space: normal; overflow: visible; max-width: 100% !important; }
    .mobile-cards input[type=checkbox], .mobile-cards input[type=radio] { width: 24px; height: 24px; margin: .5rem; }
    .mobile-card-actions .btn { min-width: 44px; }
    .mobile-details, .mobile-details tbody, .mobile-details tr, .mobile-details td { display: block; width: 100% !important; }
    .mobile-details td { white-space: normal; overflow-wrap: anywhere; }
    .mobile-details td:first-child { border-bottom: 0; padding-bottom: 0; color: var(--text-secondary); font-size: .875rem; }
    .calendar-week-grid { grid-template-columns: minmax(0, 1fr); }
    .calendar-week-day { min-height: 0 !important; }
    .calendar-week-day .card-body { padding: .75rem !important; }
    .calendar-entry { min-height: 44px; font-size: .875rem !important; padding: .5rem !important; }
    .calendar-entry > * { white-space: normal !important; }
    .calendar-month-day { min-width: 0; padding: 0; }
    .calendar-month-day > .p-2 { padding: .25rem !important; }
    .calendar-month-day .d-flex { flex-direction: column; align-items: center !important; gap: .25rem; }
    .calendar-month-preview { display: none; }
    .calendar-more { min-height: 44px; }
    .weekly-chart { gap: .375rem !important; }
    .mobile-help .accordion-button { padding: .875rem; }
    .mobile-help .accordion-body { padding: .875rem; }
}