/* ===================================================
   RDC Lab Expense Dashboard — Modern Premium Stylesheet
   =================================================== */

:root {
    --primary:      #4361EE;
    --primary-dark: #3A0CA3;
    --secondary:    #4CC9F0;
    --success:      #10B981;
    --danger:       #EF4444;
    --warning:      #F59E0B;
    
    --dark:         #0F172A;
    --mid:          #334155;
    --muted:        #64748B;
    --bg:           #F8FAFC;
    --card-bg:      #FFFFFF;
    --border:       #E2E8F0;
    --shadow-sm:    0 1px 3px rgba(0,0,0,0.05);
    --shadow:       0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
    --shadow-lg:    0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.02);
    --radius:       16px;
    --radius-sm:    8px;
    --font:         'Inter', system-ui, -apple-system, sans-serif;
}

/* ── Reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--dark); min-height: 100vh; display: flex; flex-direction: column; line-height: 1.5; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Navbar ────────────────────────────────────────── */
.navbar {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    height: 70px;
    gap: 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border);
}
.navbar-brand { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }
.nav-logo { height: 40px; width: auto; object-fit: contain; }
.nav-title { color: var(--dark); font-size: 1.25rem; font-weight: 800; letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 0.5rem; flex: 1; }
.nav-links a {
    color: var(--muted);
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.2s ease;
}
.nav-links a:hover {
    color: var(--primary);
    background: rgba(67, 97, 238, 0.08);
}
.nav-links a.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 10px rgba(67, 97, 238, 0.3);
}
.nav-toggle { display: none; background: none; border: none; color: var(--dark); font-size: 1.5rem; cursor: pointer; margin-left: auto; }

/* ── Main Content ──────────────────────────────────── */
.main-content { flex: 1; padding: 2rem; }
.container { max-width: 1200px; margin: 0 auto; }

/* ── Page Header ───────────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}
.page-header h1 { font-size: 1.8rem; font-weight: 800; color: var(--dark); letter-spacing: -0.5px; }
.month-filter-form { display: flex; align-items: center; gap: 0.75rem; background: var(--card-bg); padding: 0.5rem; border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); border: 1px solid var(--border); }
.month-filter-form label { font-size: 0.85rem; font-weight: 600; color: var(--muted); padding-left: 0.5rem; }
.month-filter-form input[type=month],
.month-filter-form select {
    border: none;
    padding: 0.4rem;
    font-size: 0.95rem;
    font-weight: 500;
    background: transparent;
    color: var(--dark);
    font-family: var(--font);
    cursor: pointer;
}
.month-filter-form input:focus, .month-filter-form select:focus { outline: none; }
.filter-row { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }

/* ── KPI Grid ──────────────────────────────────────── */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}
.kpi-grid.mini { margin-bottom: 1.5rem; }
.kpi-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
    border: 1px solid rgba(0,0,0,0.02);
}
.kpi-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}
.kpi-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; z-index: 2;
}
.kpi-blue::before { background: linear-gradient(90deg, var(--primary), var(--secondary)); }
.kpi-red::before { background: linear-gradient(90deg, #FF6B6B, var(--danger)); }
.kpi-green::before { background: linear-gradient(90deg, #20C997, var(--success)); }
.kpi-dark::before { background: linear-gradient(90deg, var(--dark), var(--mid)); }
.kpi-loss { background: #FEF2F2; }
.kpi-loss::before { background: var(--danger); }
.kpi-label { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); margin-bottom: 0.5rem; }
.kpi-value { font-size: 1.8rem; font-weight: 800; color: var(--dark); letter-spacing: -0.5px; }
.kpi-sub { font-size: 0.85rem; color: var(--muted); margin-top: 0.5rem; font-weight: 500; }
.text-loss { color: var(--danger) !important; font-weight: 700; }

/* ── Cards ─────────────────────────────────────────── */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}
.card:hover { box-shadow: var(--shadow-lg); }
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: rgba(248, 250, 252, 0.5);
}
.card-header h2 { font-size: 1.15rem; font-weight: 700; color: var(--dark); }
.card-footer-link { padding: 1rem 1.5rem; border-top: 1px solid var(--border); background: rgba(248, 250, 252, 0.5); }

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}
@media (max-width: 900px) { .dashboard-grid { grid-template-columns: 1fr; } }

/* ── Tables ────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.data-table th, .data-table td { padding: 1rem 1.5rem; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { background: rgba(248, 250, 252, 0.8); font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); }
.data-table tbody tr { transition: background 0.2s; }
.data-table tbody tr:hover { background: #F8FAFC; }
.data-table .num { text-align: right; font-variant-numeric: tabular-nums; font-weight: 500; }
.data-table .actions-cell { text-align: right; white-space: nowrap; }
.row-highlight { background: #EEF2FF !important; }

/* ── Badges ────────────────────────────────────────── */
.badge { display: inline-block; padding: 0.35rem 0.75rem; border-radius: 999px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; }
.badge-ok { background: #D1FAE5; color: #065F46; }
.badge-loss { background: #FEE2E2; color: #991B1B; }

/* ── Category bars ─────────────────────────────────── */
.cat-list { padding: 1.5rem; display: flex; flex-direction: column; gap: 1.25rem; }
.cat-bar-row { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 0.4rem; }
.cat-name { font-size: 0.95rem; font-weight: 600; color: var(--dark); }
.cat-pct { font-size: 0.85rem; font-weight: 600; color: var(--primary); }
.progress-bar { height: 10px; background: #E2E8F0; border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--secondary), var(--primary)); border-radius: 999px; transition: width 1s cubic-bezier(0.4, 0, 0.2, 1); }
.cat-amount { font-size: 0.85rem; color: var(--muted); margin-top: 0.3rem; font-weight: 500; }

/* ── Forms ─────────────────────────────────────────── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; padding: 1.5rem; }
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group label { font-size: 0.9rem; font-weight: 700; color: var(--mid); }
.form-group small { font-size: 0.8rem; color: var(--muted); }
.form-group input,
.form-group select,
.form-group textarea {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-family: var(--font);
    background: #fff;
    color: var(--dark);
    transition: all 0.2s;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.02);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.15);
}
.req { color: var(--danger); }
.optional { font-size: 0.8rem; color: var(--muted); font-weight: 500; margin-left: 0.25rem; }
.form-actions { padding: 1.5rem; border-top: 1px solid var(--border); display: flex; gap: 1rem; align-items: center; background: rgba(248, 250, 252, 0.5); }

/* Inline add form (edit page) */
.inline-add-form { padding: 1.25rem 1.5rem; border-top: 1px solid var(--border); background: #F8FAFC; }
.inline-form-row { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }
.inline-form-row input,
.inline-form-row select {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
    flex: 1;
    min-width: 140px;
    background: #fff;
}
.inline-form-row input:focus,
.inline-form-row select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15); }

/* Table form fields */
.data-table input,
.data-table select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    background: #fff;
}

/* ── Buttons ────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: 0 4px 10px rgba(67, 97, 238, 0.25); }
.btn-primary:hover { background: linear-gradient(135deg, var(--primary-dark), var(--primary-dark)); box-shadow: 0 6px 15px rgba(67, 97, 238, 0.35); color: #fff; transform: translateY(-1px); }
.btn-outline { background: #fff; color: var(--mid); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.btn-outline:hover { background: #F8FAFC; color: var(--dark); border-color: var(--muted); }
.btn-danger { background: linear-gradient(135deg, var(--danger), #B91C1C); color: #fff; box-shadow: 0 4px 10px rgba(239, 68, 68, 0.25); }
.btn-danger:hover { background: linear-gradient(135deg, #B91C1C, #991B1B); color: #fff; transform: translateY(-1px); }
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.85rem; }
.btn-link { font-size: 0.9rem; color: var(--primary); font-weight: 600; background: none; border: none; cursor: pointer; padding: 0; }
.btn-link:hover { color: var(--primary-dark); text-decoration: underline; }
.btn-remove {
    background: #FEE2E2;
    border: none;
    color: var(--danger);
    cursor: pointer;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.2s;
    font-size: 0.85rem;
}
.btn-remove:hover { background: var(--danger); color: #fff; }

/* ── Alerts ─────────────────────────────────────────── */
.alert { padding: 1rem 1.5rem; border-radius: var(--radius-sm); margin-bottom: 1.5rem; font-size: 0.95rem; font-weight: 500; display: flex; align-items: center; gap: 1rem; }
.alert-error { background: #FEF2F2; color: #991B1B; border-left: 4px solid var(--danger); }
.alert-success { background: #ECFDF5; color: #065F46; border-left: 4px solid var(--success); }
.alert ul { margin-left: 1.5rem; list-style: disc; }

/* ── Misc ───────────────────────────────────────────── */
.empty-state { text-align: center; color: var(--muted); padding: 3rem 1rem; font-size: 1rem; font-weight: 500; }
.actions-bar { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2rem; }
.danger-zone {
    margin-top: 3rem;
    padding: 1.5rem;
    border: 1px solid #FECACA;
    border-radius: var(--radius);
    background: #FEF2F2;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* ── Footer ─────────────────────────────────────────── */
.footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--muted);
    background: #fff;
    margin-top: auto;
    border-top: 1px solid var(--border);
}

/* ── Mobile Nav & Responsive Adjustments ─────────────────────────────────────── */
@media (max-width: 768px) {
    .navbar { padding: 0 1.5rem; }
    .main-content { padding: 1.5rem; }
    .nav-toggle { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
        z-index: 200;
        box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border);
    }
    .nav-links.open { display: flex; animation: slideDown 0.3s ease forwards; }
    .nav-links a { padding: 0.85rem 1rem; font-size: 1rem; text-align: center; }
    .kpi-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
    .form-actions { flex-direction: column; align-items: stretch; }
    .form-actions .btn { width: 100%; justify-content: center; }
    .data-table th, .data-table td { padding: 0.75rem 1rem; }
}

@media (max-width: 480px) { 
    .kpi-grid { grid-template-columns: 1fr; } 
    .page-header h1 { font-size: 1.5rem; }
    .navbar { padding: 0 1rem; }
    .main-content { padding: 1rem; }
    .actions-bar .btn { flex: 1; justify-content: center; }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}