/* ─────────────────────────────────────────────────────────────
   TripSplit — App Stylesheet
   Stack: Bootstrap 5.3 (light/dark via data-bs-theme) + custom
   ───────────────────────────────────────────────────────────── */

/* ── Fonts ─────────────────────────────────────────────────── */
:root {
    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

    /* Brand */
    --ts-primary:        #4f6ef7;
    --ts-primary-dark:   #3a56d4;
    --ts-success:        #22c55e;
    --ts-danger:         #ef4444;

    /* Surfaces */
    --ts-bg:             #f0f2f8;
    --ts-surface:        #ffffff;
    --ts-surface-2:      #f7f8fc;
    --ts-border:         rgba(0, 0, 0, .07);
    --ts-border-hover:   rgba(0, 0, 0, .14);

    /* Text */
    --ts-text:           #1e2330;
    --ts-muted:          #6b7280;

    /* Shadows */
    --ts-shadow-sm:      0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --ts-shadow:         0 4px 12px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.04);
    --ts-shadow-lg:      0 8px 24px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.05);

    /* Radius */
    --ts-radius:         .75rem;
    --ts-radius-sm:      .5rem;
    --ts-radius-xs:      .35rem;

    /* Transitions */
    --ts-transition:     150ms ease;
}

[data-bs-theme="dark"] {
    --ts-bg:           #0f1117;
    --ts-surface:      #1a1d27;
    --ts-surface-2:    #22263a;
    --ts-border:       rgba(255,255,255,.07);
    --ts-border-hover: rgba(255,255,255,.14);
    --ts-text:         #e8eaf0;
    --ts-muted:        #9ba3b8;
    --ts-shadow-sm:    0 1px 3px rgba(0,0,0,.3);
    --ts-shadow:       0 4px 12px rgba(0,0,0,.4);
    --ts-shadow-lg:    0 8px 24px rgba(0,0,0,.5);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--ts-bg);
    color: var(--ts-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ── Navbar ─────────────────────────────────────────────────── */
.navbar {
    background: linear-gradient(135deg, #4f6ef7 0%, #6c5ce7 100%) !important;
    box-shadow: 0 2px 12px rgba(79,110,247,.35);
    padding-top: .6rem;
    padding-bottom: .6rem;
}

.navbar-brand {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -.3px;
}

.navbar .nav-link {
    font-size: .875rem;
    font-weight: 500;
    border-radius: var(--ts-radius-xs);
    padding: .35rem .6rem;
    transition: background var(--ts-transition);
}

.navbar .nav-link:hover {
    background: rgba(255,255,255,.15);
}

#theme-toggle {
    color: rgba(255,255,255,.85) !important;
    border: none;
    background: none;
    line-height: 1;
}

#theme-toggle:hover {
    color: #fff !important;
    background: rgba(255,255,255,.15) !important;
    border-radius: var(--ts-radius-xs);
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
    background-color: var(--ts-surface);
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius);
    box-shadow: var(--ts-shadow-sm);
    transition: box-shadow var(--ts-transition), border-color var(--ts-transition);
}

.card:hover {
    box-shadow: var(--ts-shadow);
    border-color: var(--ts-border-hover);
}

.card-header {
    background-color: var(--ts-surface);
    border-bottom: 1px solid var(--ts-border);
    border-radius: var(--ts-radius) var(--ts-radius) 0 0 !important;
    padding: .85rem 1.1rem;
    font-size: .875rem;
}

[data-bs-theme="dark"] .card-header {
    background-color: var(--ts-surface-2);
}

.card-footer {
    background-color: var(--ts-surface-2);
    border-top: 1px solid var(--ts-border);
    border-radius: 0 0 var(--ts-radius) var(--ts-radius) !important;
}

[data-bs-theme="dark"] .card-footer {
    background-color: var(--ts-surface);
}

/* ── Dashboard trip cards ───────────────────────────────────── */
.card.h-100 {
    transition: transform var(--ts-transition), box-shadow var(--ts-transition);
}

.card.h-100:hover {
    transform: translateY(-2px);
    box-shadow: var(--ts-shadow-lg);
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
    border-radius: var(--ts-radius-xs);
    font-size: .875rem;
    font-weight: 500;
    transition: all var(--ts-transition);
}

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

.btn-primary:hover {
    background: var(--ts-primary-dark);
    border-color: var(--ts-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(79,110,247,.4);
}

.btn-success:hover { transform: translateY(-1px); }
.btn-danger:hover  { transform: translateY(-1px); }

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

[data-bs-theme="dark"] .btn-outline-secondary {
    color: var(--ts-muted);
    border-color: var(--ts-border-hover);
}

[data-bs-theme="dark"] .btn-outline-secondary:hover {
    background: var(--ts-surface-2);
    color: var(--ts-text);
}

/* ── Forms ──────────────────────────────────────────────────── */
.form-control, .form-select {
    border-radius: var(--ts-radius-xs);
    border-color: var(--ts-border-hover);
    background-color: var(--ts-surface);
    color: var(--ts-text);
    font-size: .875rem;
    transition: border-color var(--ts-transition), box-shadow var(--ts-transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--ts-primary);
    box-shadow: 0 0 0 3px rgba(79,110,247,.15);
    background-color: var(--ts-surface);
    color: var(--ts-text);
}

[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background-color: var(--ts-surface-2);
    border-color: var(--ts-border-hover);
    color: var(--ts-text);
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    background-color: var(--ts-surface-2);
}

.form-label {
    font-size: .8125rem;
    font-weight: 600;
    color: var(--ts-muted);
    margin-bottom: .3rem;
    text-transform: uppercase;
    letter-spacing: .03em;
}

.form-text {
    font-size: .78rem;
    color: var(--ts-muted);
}

/* ── Tables ─────────────────────────────────────────────────── */
.table {
    font-size: .875rem;
    color: var(--ts-text);
}

.table-light {
    --bs-table-bg: var(--ts-surface-2);
    color: var(--ts-muted);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .04em;
}

[data-bs-theme="dark"] .table-light {
    --bs-table-bg: var(--ts-surface-2);
    color: var(--ts-muted);
}

.table > :not(caption) > * > * {
    border-bottom-color: var(--ts-border);
}

/* ── List groups ────────────────────────────────────────────── */
.list-group-item {
    background-color: var(--ts-surface);
    border-color: var(--ts-border);
    color: var(--ts-text);
    font-size: .875rem;
    transition: background-color var(--ts-transition);
}

.list-group-item:hover {
    background-color: var(--ts-surface-2);
}

[data-bs-theme="dark"] .list-group-item {
    background-color: var(--ts-surface);
    border-color: var(--ts-border);
}

[data-bs-theme="dark"] .list-group-item:hover {
    background-color: var(--ts-surface-2);
}

.trip-expense-filters .form-label {
    margin-bottom: .25rem;
}

.trip-expense-filters .btn {
    min-width: 5.75rem;
}

/* ── Badges ─────────────────────────────────────────────────── */
.badge {
    font-size: .72rem;
    font-weight: 600;
    border-radius: var(--ts-radius-xs);
    padding: .28em .55em;
}

.badge.rounded-pill {
    font-size: .82rem;
    padding: .35em .7em;
}

/* ── Alerts ─────────────────────────────────────────────────── */
.alert {
    border-radius: var(--ts-radius-sm);
    border-width: 0;
    font-size: .875rem;
}

.alert-danger  { background: #fef2f2; color: #b91c1c; }
.alert-success { background: #f0fdf4; color: #15803d; }
.alert-warning { background: #fffbeb; color: #92400e; }
.alert-info    { background: #eff6ff; color: #1d4ed8; }

[data-bs-theme="dark"] .alert-danger  { background: rgba(239,68,68,.12);  color: #fca5a5; }
[data-bs-theme="dark"] .alert-success { background: rgba(34,197,94,.12);  color: #86efac; }
[data-bs-theme="dark"] .alert-warning { background: rgba(234,179,8,.12);  color: #fde047; }
[data-bs-theme="dark"] .alert-info    { background: rgba(59,130,246,.12); color: #93c5fd; }

/* ── Breadcrumb ─────────────────────────────────────────────── */
.breadcrumb {
    font-size: .8125rem;
    background: none;
    padding: 0;
    margin-bottom: 1rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--ts-muted);
}

.breadcrumb-item a {
    color: var(--ts-primary);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--ts-muted);
}

/* ── Dropdowns ──────────────────────────────────────────────── */
.dropdown-menu {
    border-radius: var(--ts-radius-sm);
    border: 1px solid var(--ts-border);
    box-shadow: var(--ts-shadow-lg);
    background-color: var(--ts-surface);
    padding: .35rem;
    font-size: .875rem;
}

[data-bs-theme="dark"] .dropdown-menu {
    background-color: var(--ts-surface-2);
    border-color: var(--ts-border-hover);
}

.dropdown-item {
    border-radius: var(--ts-radius-xs);
    padding: .45rem .75rem;
    color: var(--ts-text);
    transition: background var(--ts-transition);
}

.dropdown-item:hover {
    background-color: var(--ts-surface-2);
    color: var(--ts-text);
}

[data-bs-theme="dark"] .dropdown-item:hover {
    background-color: rgba(255,255,255,.07);
}

.dropdown-divider {
    border-color: var(--ts-border);
    margin: .3rem 0;
}

/* ── Page headings ──────────────────────────────────────────── */
h1.h3 {
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -.3px;
}

/* ── Settlement badges ──────────────────────────────────────── */
.settlement-arrow {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .6rem 0;
    border-bottom: 1px solid var(--ts-border);
}

.settlement-arrow:last-child { border-bottom: none; }

/* ── Participant checkboxes ─────────────────────────────────── */
#participants-box {
    max-height: 220px;
    overflow-y: auto;
    border-radius: var(--ts-radius-xs);
    border-color: var(--ts-border-hover) !important;
    background-color: var(--ts-surface);
}

[data-bs-theme="dark"] #participants-box {
    background-color: var(--ts-surface-2);
    border-color: var(--ts-border-hover) !important;
}

.participant-split-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    padding: .35rem 0;
    border-bottom: 1px solid var(--ts-border);
}

.participant-split-row:last-child {
    border-bottom: none;
}

.participant-split-row.is-inactive {
    opacity: .65;
}

.participant-split-member {
    flex: 1 1 auto;
    min-width: 0;
    margin-bottom: 0;
}

.participant-split-amount {
    width: 170px;
    flex: 0 0 170px;
}

.participant-share-currency {
    min-width: 4.25rem;
    justify-content: center;
}

[data-bs-theme="dark"] .participant-share-currency {
    background-color: var(--ts-surface);
    color: var(--ts-muted);
    border-color: var(--ts-border-hover);
}

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

/* ── Footer ─────────────────────────────────────────────────── */
footer {
    font-size: .8125rem;
    background-color: var(--ts-surface) !important;
    border-top-color: var(--ts-border) !important;
    color: var(--ts-muted);
}

[data-bs-theme="dark"] footer {
    background-color: var(--ts-surface) !important;
}

/* ── Balance badges ─────────────────────────────────────────── */
.balance-badge {
    font-size: .8rem;
    font-weight: 600;
    padding: .3em .65em;
    border-radius: var(--ts-radius-xs);
}

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,.18); border-radius: 3px; }
[data-bs-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255,255,255,.18); }

/* ── Mobile ─────────────────────────────────────────────────── */
@media (max-width: 576px) {
    h1.h3 { font-size: 1.2rem; }

    .card { border-radius: var(--ts-radius-sm); }

    .btn-group.flex-wrap { width: 100%; }
    .btn-group.flex-wrap .btn { flex: 1 1 auto; }

    .participant-split-row {
        flex-direction: column;
        align-items: stretch;
    }

    .participant-split-amount {
        width: 100%;
        flex-basis: auto;
        padding-left: 1.7rem;
    }
}

/* ── Utility: muted text ────────────────────────────────────── */
.text-muted { color: var(--ts-muted) !important; }

/* ── Table-light dark override ──────────────────────────────── */
[data-bs-theme="dark"] .table-light,
[data-bs-theme="dark"] tfoot.table-light {
    --bs-table-color: var(--ts-muted);
    --bs-table-bg: var(--ts-surface-2);
    --bs-table-border-color: var(--ts-border);
}

/* ── Admin sidebar layout ───────────────────────────────────── */
.admin-sidebar-title {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--ts-muted);
    padding: .4rem .5rem .2rem;
}

.admin-sidebar-nav {
    gap: 1px;
}

.admin-sidebar-link {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    padding: .55rem .6rem;
    border-radius: var(--ts-radius-xs);
    color: var(--ts-text);
    text-decoration: none;
    transition: background var(--ts-transition), color var(--ts-transition);
    line-height: 1.35;
}

.admin-sidebar-link:hover {
    background: var(--ts-surface-2);
    color: var(--ts-text);
}

.admin-sidebar-link.is-active {
    background: rgba(79,110,247,.12);
    color: var(--ts-primary);
}

[data-bs-theme="dark"] .admin-sidebar-link.is-active {
    background: rgba(79,110,247,.2);
}

.admin-sidebar-icon {
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: .1rem;
    color: var(--ts-muted);
}

.admin-sidebar-link.is-active .admin-sidebar-icon {
    color: var(--ts-primary);
}

.admin-sidebar-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.admin-sidebar-label {
    font-size: .8125rem;
    font-weight: 600;
}

.admin-sidebar-desc {
    font-size: .72rem;
    color: var(--ts-muted);
    white-space: normal;
    line-height: 1.3;
    display: none;
}

@media (min-width: 992px) {
    .admin-sidebar-desc { display: block; }
}

/* ── Admin section intro card ───────────────────────────────── */
.admin-section-intro {
    border-left: 3px solid var(--ts-primary);
}

/* ── Admin user actions ─────────────────────────────────────── */
.admin-user-actions-cell {
    white-space: nowrap;
    vertical-align: top;
}

.admin-user-actions {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    align-items: flex-start;
}

.admin-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: .3rem;
    align-items: center;
}

.admin-inline-form {
    display: inline-flex;
    align-items: center;
}

.admin-ban-form {
    display: flex;
    align-items: center;
    gap: .3rem;
    flex-wrap: wrap;
}

.admin-current-account {
    font-size: .72rem;
    color: var(--ts-muted);
    font-style: italic;
}