/* ─────────────────────────────────────────
   Mashaweeri — UX CSS (Phase 12)
   Mobile nav, loading states, a11y
   ───────────────────────────────────────── */

:root {
    --bottom-nav-height: 68px;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100%;
    inset-inline-start: var(--space-4);
    z-index: 10000;
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: var(--space-2);
}

/* Mobile header menu */
.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    font-size: 1.25rem;
    -webkit-tap-highlight-color: transparent;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.mobile-menu-panel {
    display: none;
    position: absolute;
    top: var(--header-height);
    inset-inline: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-4);
    z-index: 99;
}

.mobile-menu-panel.open {
    display: block;
}

.mobile-menu-panel .user-nav,
.mobile-menu-panel .guest-nav {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
}

.mobile-menu-panel .guest-nav .btn {
    width: 100%;
    justify-content: center;
    min-height: 44px;
}

.mobile-menu-panel .lang-switcher {
    margin-top: var(--space-3);
    justify-content: center;
}

@media (max-width: 767px) {
    .mobile-menu-toggle {
        display: inline-flex;
    }

    .header-actions > .user-nav,
    .header-actions > .guest-nav,
    .header-actions > .lang-switcher {
        display: none;
    }

    .app-header {
        position: sticky;
    }

    .app-header .header-inner {
        position: relative;
    }
}

@media (min-width: 768px) {
    .mobile-menu-panel {
        display: none !important;
    }
}

/* Bottom navigation */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    inset-inline: 0;
    z-index: 200;
    height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.06);
}

@media (max-width: 767px) {
    .bottom-nav {
        display: flex;
        align-items: stretch;
        justify-content: space-around;
    }

    body.has-bottom-nav .app-main {
        padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px) + var(--space-4));
    }

    body.has-bottom-nav .fab-wrapper {
        bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px) + var(--space-3));
    }

    body.has-bottom-nav .fab:not(.fab-wrapper .fab-toggle) {
        bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px) + var(--space-3));
    }

    body.has-bottom-nav .toast-container {
        bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px) + var(--space-3));
    }
}

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: var(--space-1) var(--space-1);
    min-height: 48px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-xs);
    font-weight: 700;
    -webkit-tap-highlight-color: transparent;
    transition: color var(--transition);
}

.bottom-nav-item:hover,
.bottom-nav-item.active {
    color: var(--color-primary);
    text-decoration: none;
}

.bottom-nav-icon {
    font-size: 1.375rem;
    line-height: 1;
}

.bottom-nav-label {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.6875rem;
    line-height: 1.2;
}

/* Form loading state */
.btn.is-loading {
    opacity: 0.75;
    pointer-events: none;
    position: relative;
}

.btn.is-loading::after {
    content: '';
    display: inline-block;
    width: 1em;
    height: 1em;
    margin-inline-start: var(--space-2);
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 600ms linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Pagination UX */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-top: var(--space-4);
}

.pagination-info {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Empty state polish */
.empty-state {
    text-align: center;
    padding: var(--space-8) var(--space-4);
}

.empty-state p {
    margin-bottom: var(--space-4);
    color: var(--color-text-muted);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Net income colors — shared */
.net-positive { color: var(--color-success); }
.net-negative { color: var(--color-danger); }

/* Touch-friendly table scroll hint */
.table-wrap {
    -webkit-overflow-scrolling: touch;
}

/* Form actions row */
.form-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-top: var(--space-4);
}

.form-row {
    display: grid;
    gap: var(--space-3);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.form-check input {
    width: 18px;
    height: 18px;
}

.form-error {
    color: var(--color-danger);
    font-size: var(--font-size-xs);
    margin-top: var(--space-1);
}

/* FAB — floating action button (dashboard, trips, expenses) */
.fab-wrapper {
    position: fixed;
    bottom: calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
    inset-inline-end: var(--space-4);
    z-index: 250;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-3);
}

.fab-menu {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    min-width: 180px;
}

.fab-menu[hidden] {
    display: none;
}

.fab-menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    transition: background var(--transition);
}

.fab-menu-item:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    text-decoration: none;
}

.fab-menu-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.fab,
.fab-wrapper .fab-toggle {
    position: relative;
    bottom: auto;
    inset-inline-end: auto;
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 16px rgba(26, 86, 219, 0.45);
    cursor: pointer;
    transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
    -webkit-tap-highlight-color: transparent;
}

.fab:not(.fab-wrapper .fab-toggle) {
    position: fixed;
    bottom: calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
    inset-inline-end: var(--space-4);
    z-index: 250;
}

.fab:hover,
.fab-wrapper .fab-toggle:hover {
    background: var(--color-primary-dark);
    color: #fff;
    text-decoration: none;
    transform: scale(1.06);
    box-shadow: 0 6px 20px rgba(26, 86, 219, 0.5);
}

.fab:active,
.fab-wrapper .fab-toggle:active {
    transform: scale(0.96);
}

.fab-wrapper .fab-toggle.open {
    transform: rotate(45deg);
    background: var(--color-primary-dark);
}

.fab-wrapper .fab-toggle.open:hover {
    transform: rotate(45deg) scale(1.06);
}