/* ────────────────────────────────────────────────────
   Design System — Daily Expenses
   ──────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --pri:        #6366f1;
    --pri-dark:   #4f46e5;
    --pri-deep:   #3730a3;
    --sec:        #8b5cf6;
    --ok:         #10b981;
    --err:        #ef4444;

    --bg:         #f1f5f9;
    --surface:    #ffffff;
    --surface-2:  #f8fafc;

    --t1:  #1e293b;
    --t2:  #475569;
    --t3:  #94a3b8;
    --bdr: #e2e8f0;

    --r-xl: 22px;
    --r-lg: 14px;
    --r-md: 10px;
    --r-sm: 7px;

    --sh:   0 2px 4px rgba(0,0,0,.04), 0 12px 32px rgba(99,102,241,.08);
    --sh-2: 0 8px 24px rgba(0,0,0,.07), 0 32px 56px rgba(99,102,241,.13);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--t1);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ─────────────────────────────────────────────────────
   Navbar
   ───────────────────────────────────────────────────── */
.app-nav {
    background: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
    height: 64px;
    padding: 0 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 300;
    box-shadow: 0 4px 24px rgba(67,56,202,.3);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: .55rem;
    text-decoration: none;
    color: #fff;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: -.02em;
}

.brand-icon {
    width: 34px; height: 34px;
    background: rgba(255,255,255,.18);
    border-radius: var(--r-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
    backdrop-filter: blur(4px);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: .25rem;
}

.nav-link-item {
    color: rgba(255,255,255,.72);
    text-decoration: none;
    font-size: .84rem;
    font-weight: 600;
    padding: .45rem 1rem;
    border-radius: var(--r-md);
    display: flex;
    align-items: center;
    gap: .4rem;
    transition: all .18s;
}

.nav-link-item:hover { color: #fff; background: rgba(255,255,255,.14); }
.nav-link-item.active { color: #fff; background: rgba(255,255,255,.22); }

.nav-toggler {
    display: none;
    background: rgba(255,255,255,.14);
    border: 1px solid rgba(255,255,255,.22);
    border-radius: var(--r-sm);
    color: #fff;
    font-size: 1.2rem;
    padding: .3rem .6rem;
    cursor: pointer;
    line-height: 1;
}

/* ─────────────────────────────────────────────────────
   Layout
   ───────────────────────────────────────────────────── */
.page-wrap {
    max-width: 1060px;
    margin: 0 auto;
    padding: 2rem 1.25rem 4rem;
}

.page-wrap-wide { max-width: 1060px; }

.two-col {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* ─────────────────────────────────────────────────────
   App Card
   ───────────────────────────────────────────────────── */
.app-card {
    background: var(--surface);
    border-radius: var(--r-xl);
    box-shadow: var(--sh);
    border: 1px solid rgba(99,102,241,.07);
    overflow: hidden;
}

.card-stripe {
    height: 4px;
    background: linear-gradient(90deg, var(--pri), var(--sec));
}

.card-inner { padding: 1.75rem; }

/* ─────────────────────────────────────────────────────
   Card heading
   ───────────────────────────────────────────────────── */
.card-heading {
    display: flex;
    align-items: center;
    gap: .9rem;
    margin-bottom: 1.5rem;
}

.heading-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--pri), var(--sec));
    border-radius: var(--r-md);
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    font-size: 1rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(99,102,241,.3);
}

.heading-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--t1);
    line-height: 1.2;
}

.heading-sub {
    font-size: .78rem;
    color: var(--t3);
    margin-top: .1rem;
}

/* ─────────────────────────────────────────────────────
   Form fields
   ───────────────────────────────────────────────────── */
.field-group { margin-bottom: 1.1rem; }

.field-label {
    display: flex;
    align-items: center;
    gap: .35rem;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--t2);
    margin-bottom: .45rem;
}

.field-input {
    width: 100%;
    padding: .78rem 1.05rem;
    border: 2px solid var(--bdr);
    border-radius: var(--r-lg);
    font-size: .94rem;
    font-family: 'Inter', inherit;
    color: var(--t1);
    background: var(--surface-2);
    outline: none;
    transition: border-color .2s, box-shadow .2s, background .2s;
    appearance: auto;
}

.field-input:focus {
    border-color: var(--pri);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(99,102,241,.1);
}

.amount-wrap { position: relative; }

.amount-prefix {
    position: absolute;
    left: 1.05rem;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 800;
    color: var(--pri);
    font-size: .95rem;
    pointer-events: none;
    z-index: 1;
}

.amount-input { padding-left: 2rem; }

/* ─────────────────────────────────────────────────────
   Save Button
   ───────────────────────────────────────────────────── */
.save-btn {
    width: 100%;
    margin-top: 1.4rem;
    padding: .9rem;
    background: linear-gradient(135deg, var(--pri) 0%, var(--sec) 100%);
    color: #fff;
    border: none;
    border-radius: var(--r-lg);
    font-size: .95rem;
    font-weight: 700;
    font-family: 'Inter', inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    transition: transform .18s, box-shadow .18s;
    box-shadow: 0 4px 16px rgba(99,102,241,.28);
    position: relative;
    overflow: hidden;
}

.save-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0);
    transition: background .18s;
}

.save-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99,102,241,.38);
}

.save-btn:active:not(:disabled) { transform: translateY(0); }
.save-btn:disabled { opacity: .65; cursor: not-allowed; }

.btn-content, .btn-spinner { display: flex; align-items: center; gap: .45rem; }

.spinner {
    width: 16px; height: 16px;
    border: 2.5px solid rgba(255,255,255,.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .7s linear infinite;
    display: inline-block;
}

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

/* ─────────────────────────────────────────────────────
   Alert
   ───────────────────────────────────────────────────── */
.form-alert {
    padding: .75rem 1rem;
    border-radius: var(--r-md);
    font-size: .875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.form-alert.success { background: #dcfce7; color: #166534; border-left: 3px solid #16a34a; }
.form-alert.error   { background: #fee2e2; color: #991b1b; border-left: 3px solid var(--err); }
.form-alert.hidden  { display: none; }

/* ─────────────────────────────────────────────────────
   Expenses panel
   ───────────────────────────────────────────────────── */
.expenses-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.5rem 1.75rem 1rem;
    border-bottom: 1px solid var(--bdr);
}

.expenses-eyebrow {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--t3);
    display: block;
    margin-bottom: .2rem;
}

.expenses-date {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--t1);
}

.day-total {
    background: linear-gradient(135deg, var(--ok), #059669);
    color: #fff;
    font-size: .88rem;
    font-weight: 800;
    padding: .4rem 1.1rem;
    border-radius: 99px;
    box-shadow: 0 3px 10px rgba(16,185,129,.25);
    white-space: nowrap;
}

.expenses-body { padding: 1rem 1.5rem 1.5rem; }

/* ─────────────────────────────────────────────────────
   Expense rows
   ───────────────────────────────────────────────────── */
.exp-row {
    display: flex;
    align-items: center;
    gap: .85rem;
    background: var(--surface-2);
    border: 1px solid var(--bdr);
    border-radius: var(--r-lg);
    padding: .85rem 1rem;
    margin-bottom: .6rem;
    transition: box-shadow .15s, transform .15s;
}

.exp-row:last-child { margin-bottom: 0; }
.exp-row:hover { box-shadow: 0 4px 16px rgba(99,102,241,.1); transform: translateY(-1px); }

.exp-ava {
    width: 40px; height: 40px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: .82rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,.15);
}

.exp-info { flex: 1; min-width: 0; }

.exp-who {
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--t3);
    margin-bottom: .15rem;
}

.exp-what {
    font-size: .9rem;
    font-weight: 600;
    color: var(--t1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.exp-right {
    display: flex;
    align-items: center;
    gap: .55rem;
    flex-shrink: 0;
}

.exp-amt {
    background: #ede9fe;
    color: var(--pri-dark);
    font-size: .84rem;
    font-weight: 800;
    padding: .3rem .75rem;
    border-radius: 99px;
}

.exp-del {
    width: 32px; height: 32px;
    border-radius: var(--r-sm);
    border: 1.5px solid #fecaca;
    background: #fff;
    color: var(--err);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: .8rem;
    transition: all .15s;
}

.exp-del:hover { background: #fee2e2; border-color: var(--err); }

/* ─────────────────────────────────────────────────────
   Empty state
   ───────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--t3);
}

.empty-icon { font-size: 2.8rem; margin-bottom: .6rem; }
.empty-text { font-size: .9rem; font-weight: 500; }

/* ─────────────────────────────────────────────────────
   Monthly page
   ───────────────────────────────────────────────────── */
.monthly-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.page-title {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--t1);
    display: flex;
    align-items: center;
    gap: .55rem;
}

.page-title i { color: var(--pri); }

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.year-total-badge {
    display: flex;
    align-items: center;
    gap: .6rem;
    background: linear-gradient(135deg, var(--pri), var(--sec));
    color: #fff;
    padding: .55rem 1.2rem;
    border-radius: 99px;
    box-shadow: 0 4px 14px rgba(99,102,241,.3);
}

.ytb-label { font-size: .72rem; font-weight: 600; opacity: .85; }
.ytb-amount { font-size: .95rem; font-weight: 800; }

.year-form { display: flex; align-items: center; gap: .6rem; }

.year-label {
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--t2);
}

.year-select {
    padding: .55rem 1rem;
    border: 2px solid var(--bdr);
    border-radius: var(--r-md);
    font-size: .92rem;
    font-family: 'Inter', inherit;
    font-weight: 600;
    color: var(--t1);
    background: var(--surface);
    cursor: pointer;
    outline: none;
    transition: border-color .2s;
}

.year-select:focus { border-color: var(--pri); }

/* Month grid */
.month-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.1rem;
}

.month-tile {
    background: var(--surface);
    border: 2px solid var(--bdr);
    border-radius: var(--r-xl);
    padding: 1.3rem 1rem 1.1rem;
    text-align: center;
    transition: all .2s;
    position: relative;
    overflow: hidden;
}

.month-tile.tile-active {
    border-color: rgba(99,102,241,.35);
    background: linear-gradient(160deg, #f5f3ff 0%, #fff 70%);
    box-shadow: 0 4px 20px rgba(99,102,241,.1);
}

.month-tile:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(99,102,241,.13); }

.tile-bar {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--pri), var(--sec));
}

.tile-name {
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--t3);
    margin-bottom: .7rem;
}

.tile-amount {
    font-size: 1rem;
    font-weight: 800;
    color: var(--pri);
    margin-bottom: .25rem;
}

.tile-nil {
    font-size: .9rem;
    font-weight: 600;
    color: var(--t3);
    margin-bottom: .25rem;
}

.tile-count {
    font-size: .7rem;
    color: var(--t3);
    margin-bottom: .7rem;
}

.tile-link {
    font-size: .73rem;
    font-weight: 700;
    color: var(--pri);
    text-decoration: none;
    padding: .28rem .75rem;
    border: 1.5px solid rgba(99,102,241,.35);
    border-radius: 99px;
    display: inline-block;
    transition: all .15s;
}

.tile-link:hover {
    background: var(--pri);
    color: #fff;
    border-color: var(--pri);
}

/* ─────────────────────────────────────────────────────
   Day list page
   ───────────────────────────────────────────────────── */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    color: var(--t2);
    text-decoration: none;
    font-size: .84rem;
    font-weight: 600;
    padding: .45rem .9rem;
    border: 1.5px solid var(--bdr);
    border-radius: var(--r-md);
    margin-bottom: 1.25rem;
    transition: all .15s;
}

.back-btn:hover { color: var(--pri); border-color: var(--pri); background: #f5f3ff; }

.daylist-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--bdr);
}

.tbl-wrap { overflow-x: auto; }

.exp-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .9rem;
}

.exp-table th {
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--t3);
    font-weight: 700;
    padding: .5rem .75rem;
    border-bottom: 1.5px solid var(--bdr);
    text-align: left;
    white-space: nowrap;
}

.exp-table td {
    padding: .9rem .75rem;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.exp-table tr:last-child td { border-bottom: none; }
.exp-table tr:hover td { background: var(--surface-2); }

.tbl-date { font-weight: 700; color: var(--t1); }

.tbl-day {
    font-size: .7rem;
    font-weight: 600;
    background: var(--surface-2);
    color: var(--t2);
    padding: .15rem .4rem;
    border-radius: 4px;
    margin-left: .4rem;
}

.tbl-link {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .8rem;
    font-weight: 700;
    color: var(--pri);
    text-decoration: none;
    padding: .3rem .7rem;
    border: 1.5px solid rgba(99,102,241,.3);
    border-radius: var(--r-sm);
    transition: all .15s;
}

.tbl-link:hover { background: var(--pri); color: #fff; border-color: var(--pri); }

/* ─────────────────────────────────────────────────────
   Select2 custom theme
   ───────────────────────────────────────────────────── */
.select2-container { width: 100% !important; }

.select2-container--default .select2-selection--single {
    height: auto;
    padding: .78rem 1.05rem;
    border: 2px solid var(--bdr) !important;
    border-radius: var(--r-lg) !important;
    background: var(--surface-2) !important;
    display: flex;
    align-items: center;
    outline: none;
    transition: border-color .2s, box-shadow .2s;
}

.select2-container--default.select2-container--open .select2-selection--single,
.select2-container--default.select2-container--focus .select2-selection--single {
    border-color: var(--pri) !important;
    background: #fff !important;
    box-shadow: 0 0 0 4px rgba(99,102,241,.1);
}

.select2-container--default .select2-selection--single .select2-selection__rendered {
    padding: 0;
    line-height: 1;
    color: var(--t1);
    font-size: .94rem;
    font-weight: 500;
    font-family: 'Inter', inherit;
}

.select2-container--default .select2-selection--single .select2-selection__arrow {
    top: 50%;
    right: .85rem;
    transform: translateY(-50%);
    height: auto;
    width: auto;
}

.select2-container--default .select2-selection--single .select2-selection__arrow b {
    border-color: var(--t2) transparent transparent;
    border-width: 6px 5px 0;
    margin-top: -3px;
}

.select2-container--default.select2-container--open .select2-selection--single .select2-selection__arrow b {
    border-color: transparent transparent var(--pri);
    border-width: 0 5px 6px;
}

.select2-dropdown {
    border: 2px solid var(--pri) !important;
    border-radius: var(--r-lg) !important;
    box-shadow: 0 10px 40px rgba(99,102,241,.2) !important;
    overflow: hidden;
    margin-top: 6px;
    font-family: 'Inter', inherit;
}

.select2-results__option {
    padding: .7rem 1rem !important;
    font-size: .92rem;
    font-weight: 500;
    color: var(--t1) !important;
    transition: background .12s;
    cursor: pointer;
}

.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background: #f5f3ff !important;
    color: var(--pri) !important;
}

.select2-container--default .select2-results__option[aria-selected=true] {
    background: #ede9fe !important;
    color: var(--pri-dark) !important;
    font-weight: 700;
}

/* Member avatar row in Select2 */
.s2-row {
    display: flex;
    align-items: center;
    gap: .7rem;
}

.s2-dot {
    width: 28px; height: 28px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: .72rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}

/* ─────────────────────────────────────────────────────
   Utility
   ───────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ─────────────────────────────────────────────────────
   Responsive
   ───────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .two-col { grid-template-columns: 1fr; }
    .month-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .app-nav { padding: 0 1rem; }
    .nav-toggler { display: flex; }

    .nav-menu {
        display: none;
        position: absolute;
        top: 64px; left: 0; right: 0;
        background: linear-gradient(180deg, #4338ca, #6d28d9);
        flex-direction: column;
        padding: .75rem 1rem 1rem;
        gap: .2rem;
        box-shadow: 0 8px 24px rgba(67,56,202,.3);
        z-index: 299;
    }

    .nav-menu.open { display: flex; }

    .nav-link-item {
        padding: .65rem 1rem;
        border-radius: var(--r-md);
        width: 100%;
    }

    .page-wrap { padding: 1.25rem .9rem 3rem; }

    .monthly-toolbar { flex-direction: column; align-items: flex-start; }
    .toolbar-right { flex-direction: column; align-items: flex-start; gap: .75rem; }

    .month-grid { grid-template-columns: repeat(2, 1fr); gap: .75rem; }

    .card-inner { padding: 1.25rem; }
    .expenses-head { padding: 1.25rem 1.25rem .75rem; }
    .expenses-body { padding: .75rem 1rem 1rem; }
}

@media (max-width: 480px) {
    .month-grid { grid-template-columns: repeat(2, 1fr); gap: .6rem; }
    .tile-amount { font-size: .9rem; }
    .two-col { gap: 1rem; }
}