/* ─────────────────────────────────────────────────────────────────────────────
   FamilySplit — Mobile-first Design System
   ─────────────────────────────────────────────────────────────────────────────
   Color single source of truth: src/FamilySplit.Client/Theme/AppTheme.cs
   MudThemeProvider emits --mud-palette-* CSS variables from that theme.
   The --fs-* aliases below map to those variables so all CSS stays in sync
   with the theme automatically — change AppTheme.cs and everything updates.
   ───────────────────────────────────────────────────────────────────────────── */

/* ── Semantic aliases → MudBlazor palette vars ───────────────────────────── */
:root {
    /* Brand */
    --fs-primary:        var(--mud-palette-primary);
    --fs-primary-light:  var(--mud-palette-primary-lighten);
    --fs-primary-dark:   var(--mud-palette-primary-darken);

    /* Semantic colours */
    --fs-green:          var(--mud-palette-success);
    --fs-green-light:    var(--mud-palette-success-lighten);
    --fs-red:            var(--mud-palette-error);
    --fs-red-light:      var(--mud-palette-error-lighten);
    --fs-amber:          var(--mud-palette-warning);
    --fs-amber-light:    var(--mud-palette-warning-lighten);

    /* Surfaces */
    --fs-bg:             var(--mud-palette-background);
    --fs-surface:        var(--mud-palette-surface);
    --fs-surface-2:      var(--mud-palette-background-gray);
    --fs-border:         var(--mud-palette-divider);
    --fs-border-subtle:  var(--mud-palette-divider-light);

    /* Text */
    --fs-text-primary:   var(--mud-palette-text-primary);
    --fs-text-secondary: var(--mud-palette-text-secondary);
    --fs-text-tertiary:  var(--mud-palette-text-disabled);
    --fs-text-inverse:   var(--mud-palette-primary-text);

    /* Shadows — depth tokens stay fixed; only the branded FAB shadow uses
       color-mix() to derive the primary tint from the palette at runtime.    */
    --fs-shadow-sm:   0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --fs-shadow-md:   0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
    --fs-shadow-lg:   0 10px 30px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.05);
    --fs-shadow-fab:  0 6px 20px color-mix(in srgb, var(--mud-palette-primary) 40%, transparent);

    /* Geometry — not palette-derived; keep here for easy adjustment */
    --fs-radius-sm:   8px;
    --fs-radius-md:   12px;
    --fs-radius-lg:   16px;
    --fs-radius-xl:   20px;
    --fs-radius-full: 9999px;

    --fs-nav-height:    64px;
    --fs-appbar-height: 56px;
    --fs-fab-size:      54px;
}

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

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--fs-bg);
    color: var(--fs-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── MudBlazor font override ─────────────────────────────────────────────── */
.mud-typography,
.mud-button-label,
.mud-input,
.mud-chip-text,
.mud-nav-link,
.mud-list-item-text {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;
}

/* ── Loading screen ──────────────────────────────────────────────────────── */
.app-loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    gap: 16px;
    background: var(--fs-bg);
}

.app-loading-logo {
    animation: pulse 1.8s ease-in-out infinite;
}

.app-loading-text {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--fs-text-secondary);
    letter-spacing: -0.01em;
    margin: 0;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.7; transform: scale(0.96); }
}

/* ── Error UI ────────────────────────────────────────────────────────────── */
#blazor-error-ui {
    display: none;
    background: var(--fs-red);
    color: white;
    padding: 0.75rem 1.25rem;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
}

#blazor-error-ui .reload,
#blazor-error-ui .dismiss {
    color: white;
    text-decoration: underline;
    cursor: pointer;
    margin-left: 1rem;
}

/* ── AppBar overrides ────────────────────────────────────────────────────── */
.mud-appbar {
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
    border-bottom: 1px solid var(--fs-border) !important;
}

.fs-appbar-title {
    font-weight: 700 !important;
    letter-spacing: -0.02em !important;
    font-size: 1.125rem !important;
}

/* ── Drawer / Sidebar overrides ──────────────────────────────────────────── */
.mud-drawer {
    border-right: 1px solid var(--fs-border) !important;
}

.fs-sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 16px 8px;
}

.fs-sidebar-logo-mark {
    width: 32px;
    height: 32px;
    border-radius: 9px;
    background: var(--fs-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.fs-sidebar-logo-text {
    font-weight: 700;
    font-size: 1rem;
    color: var(--fs-text-primary);
    letter-spacing: -0.02em;
}

/* ── Bottom navigation ───────────────────────────────────────────────────── */
.fs-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--fs-nav-height);
    background: var(--fs-surface);
    border-top: 1px solid var(--fs-border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 1100;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
}

.fs-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    height: 100%;
    cursor: pointer;
    color: var(--fs-text-tertiary);
    text-decoration: none;
    font-size: 10px;
    font-weight: 500;
    gap: 3px;
    transition: color 0.15s ease;
    position: relative;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.fs-nav-item:hover {
    color: var(--fs-text-secondary);
}

.fs-nav-item.active {
    color: var(--fs-primary);
}

.fs-nav-icon {
    font-size: 22px;
    line-height: 1;
    transition: transform 0.15s ease;
}

.fs-nav-item.active .fs-nav-icon {
    transform: translateY(-1px);
}

.fs-nav-label {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.01em;
}

/* Active indicator dot */
.fs-nav-item.active::after {
    content: '';
    position: absolute;
    top: 6px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--fs-primary);
    opacity: 0;
}

/* ── FAB (center of bottom nav) ──────────────────────────────────────────── */
.fs-nav-fab-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.fs-nav-fab {
    width: var(--fs-fab-size);
    height: var(--fs-fab-size);
    border-radius: var(--fs-radius-md);
    background: var(--fs-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--fs-shadow-fab);
    cursor: pointer;
    border: none;
    outline: none;
    margin-top: -20px;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
}

.fs-nav-fab:hover {
    background: var(--fs-primary-dark);
    box-shadow: 0 8px 24px color-mix(in srgb, var(--mud-palette-primary) 50%, transparent);
    transform: translateY(-1px);
}

.fs-nav-fab:active {
    transform: scale(0.94) translateY(0);
    box-shadow: 0 3px 10px color-mix(in srgb, var(--mud-palette-primary) 35%, transparent);
}

.fs-nav-fab-icon {
    font-size: 26px;
    font-weight: 300;
    color: white;
}

/* ── Main content padding ────────────────────────────────────────────────── */
@media (max-width: 959px) {
    .fs-page-content {
        padding-bottom: calc(var(--fs-nav-height) + env(safe-area-inset-bottom, 0px) + 16px) !important;
    }
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.fs-card {
    background: var(--fs-surface);
    border-radius: var(--fs-radius-lg);
    border: 1px solid var(--fs-border);
    box-shadow: var(--fs-shadow-sm);
    overflow: hidden;
}

.fs-card-pressable {
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    -webkit-tap-highlight-color: transparent;
}

.fs-card-pressable:hover {
    transform: translateY(-1px);
    box-shadow: var(--fs-shadow-md);
}

.fs-card-pressable:active {
    transform: scale(0.99);
    box-shadow: var(--fs-shadow-sm);
}

/* ── Balance chip ────────────────────────────────────────────────────────── */
.fs-balance-positive {
    color: var(--fs-green) !important;
    background: var(--fs-green-light) !important;
}

.fs-balance-negative {
    color: var(--fs-red) !important;
    background: var(--fs-red-light) !important;
}

.fs-balance-neutral {
    color: var(--fs-text-secondary) !important;
    background: var(--fs-border-subtle) !important;
}

/* ── Avatar ──────────────────────────────────────────────────────────────── */
.fs-avatar {
    border-radius: var(--fs-radius-sm);
    background: var(--fs-primary-light);
    color: var(--fs-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    flex-shrink: 0;
}

/* ── Section header ──────────────────────────────────────────────────────── */
.fs-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.fs-section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--fs-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ── Hero banner ─────────────────────────────────────────────────────────── */
.fs-hero {
    background: linear-gradient(135deg, var(--fs-primary) 0%, var(--fs-primary-dark) 100%);
    border-radius: var(--fs-radius-xl);
    padding: 24px;
    color: white;
    position: relative;
    overflow: hidden;
}

.fs-hero::before {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
}

.fs-hero::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: 40px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255,255,255,0.04);
}

/* ── Stat pill ───────────────────────────────────────────────────────────── */
.fs-stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.15);
    border-radius: var(--fs-radius-full);
    padding: 4px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
}

/* ── Group card ──────────────────────────────────────────────────────────── */
.fs-group-card {
    background: var(--fs-surface);
    border-radius: var(--fs-radius-lg);
    border: 1px solid var(--fs-border);
    padding: 16px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    text-decoration: none;
    display: block;
    -webkit-tap-highlight-color: transparent;
}

.fs-group-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--fs-shadow-md);
}

.fs-group-card:active {
    transform: scale(0.99);
}

/* ── Stat chips (group/activity stats row) ───────────────────────────────── */
.fs-stat-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--fs-text-secondary);
    background: var(--fs-surface-2);
    border-radius: 6px;
    padding: 3px 8px;
}

.fs-stat-chip--positive {
    font-weight: 600;
    color: var(--fs-green);
    background: var(--fs-green-light);
}

.fs-stat-chip--negative {
    font-weight: 600;
    color: var(--fs-red);
    background: var(--fs-red-light);
}

.fs-stat-chip--warning {
    font-weight: 600;
    color: var(--fs-amber);
    background: var(--fs-amber-light);
}

/* ── Empty state ─────────────────────────────────────────────────────────── */
.fs-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    text-align: center;
    gap: 8px;
}

.fs-empty-icon {
    font-size: 48px;
    opacity: 0.25;
    margin-bottom: 8px;
}

/* ── Sign-in card ────────────────────────────────────────────────────────── */
.fs-signin-card {
    background: var(--fs-surface);
    border-radius: var(--fs-radius-xl);
    border: 1px solid var(--fs-border);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--fs-shadow-sm);
}

/* ── Animations ──────────────────────────────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.fs-fade-in {
    animation: fadeInUp 0.3s ease both;
}

.fs-fade-in-delay-1 { animation-delay: 0.05s; }
.fs-fade-in-delay-2 { animation-delay: 0.10s; }
.fs-fade-in-delay-3 { animation-delay: 0.15s; }
.fs-fade-in-delay-4 { animation-delay: 0.20s; }

/* ── Responsive show/hide (CSS-only, no JS flash) ───────────────────────── */
/* MudBlazor md breakpoint = 960px */
@media (min-width: 960px) {
    .fs-mobile-only { display: none !important; }
}
@media (max-width: 959px) {
    .fs-desktop-only { display: none !important; }
}

/* ── Utility ─────────────────────────────────────────────────────────────── */
.fs-text-money {
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.01em;
}

.fs-truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Bottom-sheet dialog (mobile) ───────────────────────────────────────── */
@media (max-width: 959px) {
    .mud-dialog-container {
        align-items: flex-end !important;
        padding: 0 !important;
    }
    .mud-dialog {
        border-radius: 20px 20px 0 0 !important;
        max-height: 92dvh !important;
        overflow-y: auto !important;
        width: 100% !important;
        max-width: 100% !important;
        padding-top: 8px !important;
    }
    /* drag-handle pip */
    .mud-dialog::before {
        content: '';
        display: block;
        width: 36px;
        height: 4px;
        border-radius: 2px;
        background: var(--fs-border);
        margin: 0 auto 4px;
    }
    .mud-dialog-title {
        padding: 12px 20px 8px !important;
    }
    .mud-dialog-content {
        padding: 8px 20px 16px !important;
    }
    .mud-dialog-actions {
        padding: 8px 16px calc(env(safe-area-inset-bottom, 0px) + 12px) !important;
        gap: 8px !important;
    }
    /* Full-width, thumb-friendly action buttons */
    .mud-dialog-actions .mud-button-root {
        flex: 1 !important;
        height: 48px !important;
        font-size: 1rem !important;
    }
}

/* ── MudBlazor component overrides ──────────────────────────────────────── */
.mud-paper {
    border-radius: var(--fs-radius-lg) !important;
}

.mud-button {
    font-family: 'Inter', sans-serif !important;
    font-weight: 500 !important;
    letter-spacing: 0 !important;
    text-transform: none !important;
    border-radius: var(--fs-radius-md) !important;
}

.mud-chip {
    border-radius: var(--fs-radius-full) !important;
    font-family: 'Inter', sans-serif !important;
    font-size: 0.75rem !important;
    font-weight: 500 !important;
}

.mud-nav-link {
    border-radius: var(--fs-radius-md) !important;
    margin: 2px 8px !important;
    font-weight: 500 !important;
}

.mud-nav-link.active {
    background: var(--fs-primary-light) !important;
    color: var(--fs-primary) !important;
}

/* Scrollbar styling (desktop) */
@media (pointer: fine) {
    ::-webkit-scrollbar {
        width: 6px;
        height: 6px;
    }
    ::-webkit-scrollbar-track {
        background: transparent;
    }
    ::-webkit-scrollbar-thumb {
        background: var(--fs-border);
        border-radius: 3px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: var(--fs-text-tertiary);
    }
}