/* ============================================================
   FINANCE TRACKER — Complete Stylesheet
   Dark theme with emerald accent
   ============================================================ */

:root {
    --bg-deep: #080d18;
    --bg-main: #0c1220;
    --bg-card: #131b2e;
    --bg-card-hover: #182240;
    --bg-input: #0f1628;
    --border: #1c2840;
    --border-light: #253352;
    --text-primary: #e4eaf4;
    --text-secondary: #6b7fa0;
    --text-muted: #3d5070;
    --accent: #00d68f;
    --accent-hover: #00c07f;
    --accent-glow: rgba(0, 214, 143, 0.15);
    --red: #ff4757;
    --red-glow: rgba(255, 71, 87, 0.12);
    --amber: #ffb142;
    --amber-glow: rgba(255, 177, 66, 0.12);
    --cyan: #00d2d3;
    --cyan-glow: rgba(0, 210, 211, 0.12);
    --purple: #a55eea;
    --sidebar-w: 260px;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: 'Space Grotesk', sans-serif; font-weight: 700; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== LOGIN OVERLAY ===== */
.login-overlay {
    position: fixed; inset: 0; z-index: 9999;
    background: var(--bg-deep);
    display: flex; align-items: center; justify-content: center;
}
.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px 40px;
    width: 400px;
    max-width: 90vw;
    text-align: center;
}
.login-box h1 { color: var(--accent); font-size: 26px; margin-bottom: 6px; }
.login-box p { color: var(--text-secondary); font-size: 14px; margin-bottom: 28px; }
.login-box input {
    width: 100%; padding: 14px 16px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    font-size: 15px; margin-bottom: 16px; outline: none;
    transition: border-color var(--transition);
}
.login-box input:focus { border-color: var(--accent); }
.login-box .login-error { color: var(--red); font-size: 13px; margin-bottom: 12px; display: none; }

/* ===== LAYOUT ===== */
.app-layout { display: flex; min-height: 100vh; }

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-main);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100;
    transition: transform var(--transition);
}
.sidebar-brand {
    padding: 28px 24px 20px;
    border-bottom: 1px solid var(--border);
}
.sidebar-brand h2 {
    font-size: 18px;
    background: linear-gradient(135deg, var(--accent), var(--cyan));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.sidebar-brand span { font-size: 12px; color: var(--text-muted); display: block; margin-top: 4px; }

.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.nav-section { margin-bottom: 8px; }
.nav-section-title {
    font-size: 10px; font-weight: 700; text-transform: uppercase;
    letter-spacing: 1.2px; color: var(--text-muted);
    padding: 8px 12px 6px; margin-top: 8px;
}
.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 14px; border-radius: var(--radius-sm);
    color: var(--text-secondary); font-size: 14px; font-weight: 500;
    cursor: pointer; transition: all var(--transition);
    text-decoration: none; user-select: none;
}
.nav-item:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-item.active {
    background: var(--accent-glow);
    color: var(--accent);
    font-weight: 600;
}
.nav-item i { width: 20px; text-align: center; font-size: 15px; }
.nav-badge {
    margin-left: auto; background: var(--red);
    color: #fff; font-size: 11px; font-weight: 700;
    padding: 2px 8px; border-radius: 10px;
}

.sidebar-footer {
    padding: 16px 12px;
    border-top: 1px solid var(--border);
}
.sidebar-footer .nav-item { color: var(--text-muted); font-size: 13px; }
.sidebar-footer .nav-item:hover { color: var(--red); }

/* Mobile toggle */
.mobile-toggle {
    display: none;
    position: fixed; top: 16px; left: 16px; z-index: 200;
    width: 44px; height: 44px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 18px;
    cursor: pointer; align-items: center; justify-content: center;
}
.sidebar-overlay {
    display: none; position: fixed; inset: 0; z-index: 90;
    background: rgba(0,0,0,0.6);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    padding: 32px;
    min-height: 100vh;
}

/* Top bar */
.top-bar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 28px; flex-wrap: wrap; gap: 16px;
}
.top-bar h1 { font-size: 26px; }
.filter-group {
    display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.filter-group select, .filter-group input[type="text"] {
    padding: 10px 14px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    font-size: 13px; outline: none; min-width: 160px;
    transition: border-color var(--transition);
}
.filter-group select:focus, .filter-group input:focus { border-color: var(--accent); }
.filter-group select option { background: var(--bg-card); }

/* ===== SUMMARY CARDS ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px; margin-bottom: 28px;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 24px;
    position: relative; overflow: hidden;
    transition: all var(--transition);
}
.stat-card:hover { border-color: var(--border-light); transform: translateY(-2px); }
.stat-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.stat-card.income::before { background: var(--accent); }
.stat-card.expense::before { background: var(--red); }
.stat-card.biz-income::before { background: var(--amber); }
.stat-card.biz-expense::before { background: var(--cyan); }
.stat-card.net::before { background: var(--purple); }
.stat-card.upcoming::before { background: var(--red); }

.stat-card .card-icon {
    width: 40px; height: 40px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; margin-bottom: 14px;
}
.stat-card.income .card-icon { background: var(--accent-glow); color: var(--accent); }
.stat-card.expense .card-icon { background: var(--red-glow); color: var(--red); }
.stat-card.biz-income .card-icon { background: var(--amber-glow); color: var(--amber); }
.stat-card.biz-expense .card-icon { background: var(--cyan-glow); color: var(--cyan); }
.stat-card.net .card-icon { background: rgba(165,94,234,0.12); color: var(--purple); }
.stat-card.upcoming .card-icon { background: var(--red-glow); color: var(--red); }

.stat-card .card-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-card .card-value { font-family: 'Space Grotesk', sans-serif; font-size: 22px; font-weight: 700; }
.stat-card.income .card-value { color: var(--accent); }
.stat-card.expense .card-value { color: var(--red); }
.stat-card.biz-income .card-value { color: var(--amber); }
.stat-card.biz-expense .card-value { color: var(--cyan); }
.stat-card.net .card-value { color: var(--purple); }

/* ===== CHARTS ===== */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 16px; margin-bottom: 28px;
}
.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}
.chart-card h3 { font-size: 15px; margin-bottom: 16px; color: var(--text-secondary); font-weight: 600; }
.chart-container { position: relative; width: 100%; }

/* ===== TABLES ===== */
.table-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.table-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap; gap: 12px;
}
.table-header h3 { font-size: 16px; }
.table-total {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 15px; font-weight: 700;
}
.table-total.green { color: var(--accent); }
.table-total.red { color: var(--red); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th {
    padding: 12px 16px;
    text-align: left; font-size: 11px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.8px;
    color: var(--text-muted);
    background: rgba(0,0,0,0.15);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
tbody td {
    padding: 12px 16px;
    font-size: 13px;
    border-bottom: 1px solid rgba(28,40,64,0.5);
    white-space: nowrap;
}
tbody tr { transition: background var(--transition); }
tbody tr:hover { background: rgba(255,255,255,0.02); }
tbody tr:last-child td { border-bottom: none; }

.badge {
    display: inline-block; padding: 3px 10px;
    border-radius: 6px; font-size: 11px; font-weight: 600;
}
.badge.yes { background: var(--accent-glow); color: var(--accent); }
.badge.no { background: var(--red-glow); color: var(--red); }
.badge.paid { background: var(--accent-glow); color: var(--accent); }
.badge.unpaid { background: var(--amber-glow); color: var(--amber); }

.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 18px; border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 600; border: none;
    cursor: pointer; transition: all var(--transition);
    font-family: inherit; text-decoration: none;
}
.btn-primary { background: var(--accent); color: #080d18; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--text-secondary); color: var(--text-primary); }
.btn-danger { background: var(--red-glow); color: var(--red); border: 1px solid rgba(255,71,87,0.2); }
.btn-danger:hover { background: rgba(255,71,87,0.2); }
.btn-edit { background: rgba(0,210,211,0.1); color: var(--cyan); border: 1px solid rgba(0,210,211,0.2); }
.btn-edit:hover { background: rgba(0,210,211,0.2); }

.actions-cell { display: flex; gap: 6px; }

/* Pagination */
.pagination {
    display: flex; align-items: center; justify-content: center;
    gap: 8px; padding: 16px;
    border-top: 1px solid var(--border);
}
.pagination button {
    padding: 8px 14px; border-radius: var(--radius-sm);
    background: var(--bg-input); border: 1px solid var(--border);
    color: var(--text-secondary); font-size: 13px;
    cursor: pointer; transition: all var(--transition);
    font-family: inherit;
}
.pagination button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pagination button:disabled { opacity: 0.3; cursor: not-allowed; }
.pagination button.active { background: var(--accent); color: #080d18; border-color: var(--accent); font-weight: 700; }
.pagination .page-info { font-size: 13px; color: var(--text-muted); }

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed; inset: 0; z-index: 500;
    background: rgba(0,0,0,0.7);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 540px;
    max-width: 92vw;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(20px) scale(0.97);
    transition: transform 0.3s ease;
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); }
.modal-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 22px 28px;
    border-bottom: 1px solid var(--border);
}
.modal-head h3 { font-size: 18px; }
.modal-close {
    width: 36px; height: 36px; border-radius: 8px;
    background: transparent; border: 1px solid var(--border);
    color: var(--text-secondary); font-size: 16px;
    cursor: pointer; transition: all var(--transition);
    display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--red-glow); color: var(--red); border-color: rgba(255,71,87,0.3); }
.modal-body { padding: 24px 28px; }
.modal-foot {
    padding: 16px 28px;
    border-top: 1px solid var(--border);
    display: flex; justify-content: flex-end; gap: 10px;
}

/* Form */
.form-group { margin-bottom: 18px; }
.form-group label {
    display: block; font-size: 12px; font-weight: 600;
    color: var(--text-secondary); margin-bottom: 6px;
    text-transform: uppercase; letter-spacing: 0.5px;
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 11px 14px;
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary);
    font-size: 14px; font-family: inherit; outline: none;
    transition: border-color var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent);
}
.form-group select option { background: var(--bg-card); }
.form-group textarea { resize: vertical; min-height: 60px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* ===== TOAST ===== */
.toast-container {
    position: fixed; top: 24px; right: 24px; z-index: 9000;
    display: flex; flex-direction: column; gap: 10px;
}
.toast {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 500;
    min-width: 280px;
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}
.toast.success { background: #0d3326; border: 1px solid rgba(0,214,143,0.3); color: var(--accent); }
.toast.error { background: #331519; border: 1px solid rgba(255,71,87,0.3); color: var(--red); }
.toast.info { background: #0d2833; border: 1px solid rgba(0,210,211,0.3); color: var(--cyan); }

@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; transform: translateX(40px); } }

/* ===== VIEW SECTIONS ===== */
.view-section { display: none; }
.view-section.active { display: block; }

/* Empty state */
.empty-state {
    text-align: center; padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state i { font-size: 48px; margin-bottom: 16px; display: block; }
.empty-state p { font-size: 14px; }

/* Confirm dialog */
.confirm-overlay {
    position: fixed; inset: 0; z-index: 600;
    background: rgba(0,0,0,0.7);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all 0.2s ease;
}
.confirm-overlay.open { opacity: 1; visibility: visible; }
.confirm-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    width: 380px;
    max-width: 90vw;
    text-align: center;
}
.confirm-box h4 { font-size: 18px; margin-bottom: 10px; }
.confirm-box p { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }
.confirm-box .btn-group { display: flex; gap: 10px; justify-content: center; }

/* ===== LOADING SPINNER ===== */
.spinner {
    width: 32px; height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 40px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .charts-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .mobile-toggle { display: flex; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay.open { display: block; }
    .main-content { margin-left: 0; padding: 80px 16px 24px; }
    .cards-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .top-bar { flex-direction: column; align-items: flex-start; }
    .filter-group { width: 100%; }
    .filter-group select, .filter-group input { min-width: 0; flex: 1; }
}
@media (max-width: 480px) {
    .cards-grid { grid-template-columns: 1fr; }
    .stat-card .card-value { font-size: 18px; }
}

/* Background ambient */
.main-content::before {
    content: '';
    position: fixed;
    top: -200px; right: -200px;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(0,214,143,0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
.main-content::after {
    content: '';
    position: fixed;
    bottom: -200px; left: -100px;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(0,210,211,0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
.view-section { position: relative; z-index: 1; }