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

/* ── Variables ── */
:root{
  --bg:#F8F9FB;
  --surface:#FFFFFF;
  --surface-2:#F4F5F7;
  --border:#E5E8EF;
  --border-h:#CBD5E1;
  --t1:#0F172A;
  --t2:#475569;
  --t3:#94A3B8;
  --accent:#16A34A;
  --accent-h:#15803D;
  --accent-lt:#DCFCE7;
  --accent-tx:#15803D;
  --danger:#EF4444;
  --danger-lt:#FEF2F2;
  --success:#10B981;
  --success-lt:#ECFDF5;
  --warn:#F59E0B;
  --sb-w:240px;
  --sh1:0 1px 2px rgba(0,0,0,.05);
  --sh2:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.04);
  --sh3:0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.06);
  --sh4:0 10px 30px rgba(0,0,0,.12),0 4px 8px rgba(0,0,0,.06);
  --r1:6px;--r2:10px;--r3:14px;--r4:20px;
  --tr:150ms ease;
}

/* ── Base ── */
body{font-family:-apple-system,BlinkMacSystemFont,'Inter','Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--t1);min-height:100vh;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
button{font-family:inherit}

/* ── Layout ── */
.layout{display:flex;min-height:100vh}

/* ── Sidebar ── */
.sidebar{width:var(--sb-w);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:40;overflow-y:auto}
.sb-logo{display:flex;align-items:center;gap:10px;padding:18px 16px 24px}
.sb-logo-icon{width:30px;height:30px;background:var(--accent);border-radius:7px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;flex-shrink:0}
.sb-logo-text{font-size:14px;font-weight:600;color:var(--t1)}
.sb-logo-sub{font-size:11px;color:var(--t3);margin-top:1px}
.sb-section{padding:0 8px;margin-bottom:20px}
.sb-section-label{font-size:10.5px;font-weight:600;color:var(--t3);letter-spacing:.07em;text-transform:uppercase;padding:0 8px;margin-bottom:4px}
.nav-list{list-style:none}
.nav-item{margin-bottom:1px}
.nav-link{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:var(--r1);color:var(--t2);font-size:13.5px;font-weight:500;cursor:pointer;transition:background var(--tr),color var(--tr);border:none;background:none;width:100%;text-align:left}
.nav-link .ni{font-size:17px;width:20px;text-align:center;flex-shrink:0}
.nav-link:hover{background:var(--surface-2);color:var(--t1)}
.nav-link.active{background:var(--accent-lt);color:var(--accent)}
.sb-bottom{margin-top:auto;padding:12px 10px;display:flex;flex-direction:column;gap:8px}
.sb-user{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:var(--r1);background:var(--surface-2);border:1px solid var(--border)}
.sb-user-avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.sb-user-info{flex:1;min-width:0}
.sb-user-name{font-size:12.5px;font-weight:600;color:var(--t1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sb-user-email{font-size:10.5px;color:var(--t3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sb-logout-btn{background:none;border:none;cursor:pointer;color:var(--t3);padding:4px;border-radius:var(--r1);display:flex;align-items:center;transition:color var(--tr),background var(--tr);flex-shrink:0}
.sb-logout-btn:hover{color:var(--danger);background:var(--danger-lt)}
.btn-add-sb{width:100%;background:var(--accent);color:#fff;border:none;padding:9px 14px;border-radius:var(--r1);font-size:13.5px;font-weight:500;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:7px;transition:background var(--tr),transform var(--tr)}
.btn-add-sb:hover{background:var(--accent-h)}
.btn-add-sb:active{transform:scale(.98)}

/* ── Main ── */
.main-content{flex:1;margin-left:var(--sb-w);display:flex;flex-direction:column;min-height:100vh}
.page-header{background:var(--surface);border-bottom:1px solid var(--border);padding:14px 28px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:30}
.page-title{font-size:17px;font-weight:600;color:var(--t1)}
.page-sub{font-size:12px;color:var(--t3);margin-top:1px}
.content{flex:1;padding:24px 28px}

/* ── Cards ── */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r3);box-shadow:var(--sh1)}
.card-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 14px}
.card-title{font-size:13.5px;font-weight:600;color:var(--t1)}
.card-sub{font-size:12px;color:var(--t3)}
.card-body{padding:0 20px 20px}
.card-divider{border:none;border-top:1px solid var(--border);margin:0 20px}

/* ── Stat cards ── */
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:20px}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r3);padding:18px 20px;box-shadow:var(--sh1);position:relative;overflow:hidden}
.stat-label{font-size:11px;font-weight:600;color:var(--t3);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.stat-val{font-size:24px;font-weight:700;color:var(--t1);letter-spacing:-.5px;line-height:1;margin-bottom:5px}
.stat-val.md{font-size:20px}
.stat-sub{font-size:12px;color:var(--t3)}
.stat-icon{position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:8px;background:var(--surface-2);display:flex;align-items:center;justify-content:center;font-size:17px}
.stat-badge{display:inline-flex;align-items:center;gap:3px;font-size:11px;font-weight:500;padding:2px 7px;border-radius:20px}
.stat-badge.up{background:#DCFCE7;color:#166534}
.stat-badge.dn{background:#FEF2F2;color:#991B1B}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:var(--r1);font-size:13px;font-weight:500;cursor:pointer;border:none;transition:background var(--tr),opacity var(--tr),transform var(--tr);white-space:nowrap;line-height:1}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.6;cursor:not-allowed;pointer-events:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-h)}
.btn-ghost{background:transparent;color:var(--t2);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--surface-2);color:var(--t1)}
.btn-danger-soft{background:var(--danger-lt);color:var(--danger)}
.btn-danger-soft:hover{background:#fee2e2}
.btn-sm{padding:5px 10px;font-size:12px}
.btn-icon{background:none;border:none;cursor:pointer;color:var(--t3);padding:5px;border-radius:var(--r1);display:inline-flex;align-items:center;justify-content:center;font-size:16px;transition:background var(--tr),color var(--tr)}
.btn-icon:hover{background:var(--surface-2);color:var(--t1)}

/* ── Forms ── */
.form-group{display:flex;flex-direction:column;gap:5px;margin-bottom:14px}
.form-label{font-size:12px;font-weight:500;color:var(--t2)}
.form-label .req{color:var(--danger)}
.form-input,.form-select,.form-textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:var(--r1);font-size:14px;background:var(--surface);color:var(--t1);outline:none;transition:border-color var(--tr),box-shadow var(--tr);font-family:inherit;appearance:none}
.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(22,163,74,.1)}
.form-input::placeholder,.form-textarea::placeholder{color:var(--t3)}
.form-input.err,.form-select.err{border-color:var(--danger)}
.form-error{font-size:11.5px;color:var(--danger);display:none;margin-top:2px}
.form-error.show{display:block}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-textarea{resize:vertical;min-height:68px}

/* ── Badges ── */
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:20px;font-size:11px;font-weight:500;white-space:nowrap}

/* ── Filters ── */
.filters-bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.search-wrap{position:relative;flex:1;min-width:180px}
.search-icon{position:absolute;left:9px;top:50%;transform:translateY(-50%);color:var(--t3);pointer-events:none;font-size:15px}
.search-input{padding-left:32px}
.filter-sel{padding:8px 10px;border:1px solid var(--border);border-radius:var(--r1);font-size:13px;background:var(--surface);color:var(--t1);cursor:pointer;outline:none;transition:border-color var(--tr);font-family:inherit}
.filter-sel:focus{border-color:var(--accent)}
.filter-sel.active-filter{border-color:var(--accent);color:var(--accent);background:var(--accent-lt)}
.filter-count{font-size:12px;color:var(--t3);white-space:nowrap}

/* ── Table ── */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.expense-table{width:100%;border-collapse:collapse}
.expense-table thead tr{border-bottom:1px solid var(--border)}
.expense-table th{font-size:10.5px;font-weight:600;color:var(--t3);text-transform:uppercase;letter-spacing:.07em;padding:10px 14px;text-align:left;white-space:nowrap;user-select:none}
.expense-table th.sortable{cursor:pointer}
.expense-table th.sortable:hover{color:var(--t2)}
.expense-table th.sorted{color:var(--accent)}
.sort-arrow{font-size:10px;margin-left:2px;opacity:.6}
.expense-table tbody tr{border-bottom:1px solid var(--border);transition:background var(--tr)}
.expense-table tbody tr:last-child{border-bottom:none}
.expense-table tbody tr:hover{background:var(--surface-2)}
.expense-table td{padding:12px 14px;font-size:13.5px;color:var(--t1);vertical-align:middle}
.td-name .name{font-weight:500}
.td-name .note{font-size:11.5px;color:var(--t3);margin-top:1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}
.td-amount{font-weight:600;text-align:right;white-space:nowrap}
.td-actions{text-align:right;white-space:nowrap}
.cat-cell{display:flex;align-items:center;gap:8px;white-space:nowrap}
.cat-icon{width:26px;height:26px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0}

/* ── Transaction cards (mobile) ── */
.m-cards{display:none}
.m-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r3);padding:14px;margin-bottom:8px;display:flex;align-items:center;gap:12px}
.m-card-icon{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:19px;flex-shrink:0}
.m-card-body{flex:1;min-width:0}
.m-card-name{font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.m-card-meta{font-size:12px;color:var(--t3);margin-top:2px}
.m-card-right{text-align:right;flex-shrink:0}
.m-card-amount{font-size:14px;font-weight:600}
.m-card-actions{display:flex;gap:2px;margin-top:4px;justify-content:flex-end}

/* ── Modal ── */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.42);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;z-index:200;padding:16px;animation:fadeIn .15s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{transform:translateY(14px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal{background:var(--surface);border-radius:var(--r4);box-shadow:var(--sh4);width:100%;max-width:500px;max-height:92vh;overflow-y:auto;animation:slideUp .2s ease}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:20px 22px 14px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--surface);z-index:1}
.modal-title{font-size:15px;font-weight:600;color:var(--t1)}
.modal-body{padding:18px 22px}
.modal-foot{padding:14px 22px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}
.del-modal{max-width:360px}
.del-icon{width:46px;height:46px;border-radius:12px;background:var(--danger-lt);display:flex;align-items:center;justify-content:center;font-size:21px;margin-bottom:14px}
.del-title{font-size:15px;font-weight:600;margin-bottom:7px}
.del-desc{font-size:13.5px;color:var(--t2);line-height:1.6}

/* ── Recent transactions ── */
.txn-list{list-style:none}
.txn-item{display:flex;align-items:center;gap:12px;padding:11px 20px;border-bottom:1px solid var(--border)}
.txn-item:last-child{border-bottom:none}
.txn-icon{width:36px;height:36px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.txn-body{flex:1;min-width:0}
.txn-name{font-size:13.5px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.txn-meta{font-size:12px;color:var(--t3);margin-top:1px}
.txn-amount{font-size:14px;font-weight:600;flex-shrink:0}

/* ── Charts ── */
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.chart-full{margin-bottom:20px}
.donut-wrap{display:flex;align-items:center;gap:20px;padding:4px 0}
.donut-legend{flex:1;min-width:0}
.legend-item{display:flex;align-items:center;justify-content:space-between;padding:4px 0}
.legend-left{display:flex;align-items:center;gap:7px;min-width:0}
.legend-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.legend-name{font-size:12.5px;color:var(--t2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.legend-val{font-size:12.5px;font-weight:500;color:var(--t1);flex-shrink:0;margin-left:8px}

/* ── Empty state ── */
.empty{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:56px 24px}
.empty-icon{font-size:44px;margin-bottom:14px;opacity:.5}
.empty-title{font-size:15px;font-weight:600;color:var(--t2);margin-bottom:6px}
.empty-desc{font-size:13.5px;color:var(--t3);max-width:300px;line-height:1.65;margin-bottom:18px}

/* ── Skeleton ── */
.skel{background:linear-gradient(90deg,var(--surface-2) 25%,#e8eaf0 50%,var(--surface-2) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:4px}
@keyframes shimmer{from{background-position:200% 0}to{background-position:-200% 0}}

/* ── Toast ── */
.toast{position:fixed;bottom:24px;right:24px;background:#1e293b;color:#fff;padding:11px 16px;border-radius:8px;font-size:13px;font-weight:500;z-index:500;box-shadow:var(--sh4);display:flex;align-items:center;gap:8px;animation:slideUp .2s ease;max-width:320px}
.toast.success{background:#064E3B}
.toast.error{background:#7F1D1D}
.toast-icon{font-size:16px}

/* ── Period tabs ── */
.period-tabs{display:flex;gap:3px;background:var(--surface-2);padding:3px;border-radius:var(--r1)}
.period-tab{padding:5px 11px;border-radius:5px;font-size:12px;font-weight:500;cursor:pointer;border:none;background:none;color:var(--t3);transition:background var(--tr),color var(--tr)}
.period-tab.active{background:var(--surface);color:var(--t1);box-shadow:var(--sh1)}

/* ── Analytics ── */
.analytics-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.top-item{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--border)}
.top-item:last-child{border-bottom:none}
.top-rank{font-size:12px;font-weight:600;color:var(--t3);width:18px;flex-shrink:0}
.top-icon{font-size:15px;width:22px;text-align:center}
.top-name{flex:1;font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.top-amount{font-size:13px;font-weight:600}

/* ── Settings ── */
.settings-section{margin-bottom:28px}
.settings-heading{font-size:13px;font-weight:600;color:var(--t2);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.settings-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r3);overflow:hidden}
.settings-row{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border)}
.settings-row:last-child{border-bottom:none}
.settings-row-info{}
.settings-row-title{font-size:14px;font-weight:500}
.settings-row-desc{font-size:12.5px;color:var(--t3);margin-top:2px}

/* ── Mobile nav ── */
.mobile-header{display:none;background:var(--surface);border-bottom:1px solid var(--border);padding:13px 16px;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:40}
.mob-logo{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600}
.mob-logo-icon{width:28px;height:28px;background:var(--accent);border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px}
.bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--border);padding:6px 0 env(safe-area-inset-bottom,0);z-index:40}
.bnav-list{display:flex;list-style:none;justify-content:space-around}
.bnav-link{display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 10px;color:var(--t3);cursor:pointer;font-size:10px;font-weight:500;transition:color var(--tr);border:none;background:none;font-family:inherit}
.bnav-link .ni{font-size:21px}
.bnav-link.active{color:var(--accent)}
.fab{display:none;position:fixed;bottom:72px;right:18px;width:50px;height:50px;background:var(--accent);color:#fff;border:none;border-radius:50%;font-size:22px;cursor:pointer;box-shadow:0 4px 16px rgba(22,163,74,.5);align-items:center;justify-content:center;transition:transform var(--tr);z-index:40}
.fab:hover{transform:scale(1.05)}
.fab:active{transform:scale(.96)}

/* ── Progress bar ── */
.progress-bar{height:6px;background:var(--surface-2);border-radius:3px;overflow:hidden;margin-top:6px}
.progress-fill{height:100%;border-radius:3px;transition:width .4s ease}

/* ── Info chip ── */
.chip{display:inline-flex;align-items:center;gap:5px;background:var(--surface-2);border:1px solid var(--border);padding:4px 9px;border-radius:20px;font-size:12px;color:var(--t2)}

/* ── Utility ── */
.hidden{display:none!important}
.flex{display:flex}
.gap-2{gap:8px}
.ml-auto{margin-left:auto}
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

/* ── Responsive ── */
@media(max-width:1100px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
  .chart-grid,.analytics-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .sidebar{display:none}
  .main-content{margin-left:0}
  .mobile-header{display:flex}
  .bottom-nav,.fab{display:flex}
  .content{padding:14px 14px 80px}
  .page-header{display:none}
  .stat-grid{grid-template-columns:1fr 1fr;gap:10px}
  .chart-grid,.analytics-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .expense-table{display:none}
  .m-cards{display:block}
  .donut-wrap{flex-direction:column}
  .donut-legend{width:100%}
}