:root{
  --teal:#0d9488; --teal-d:#0f766e; --teal-l:#ccfbf1;
  --green:#16a34a; --red:#dc2626; --amber:#d97706;
  --bg:#f1f5f9; --card:#ffffff; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --radius:16px; --shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.04);
  --maxw:1120px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg); color:var(--ink); font-size:16px; line-height:1.45;
  min-height:100vh; display:flex; flex-direction:column;
}
a{color:var(--teal-d);text-decoration:none}
h1,h2,h3{margin:0 0 .4em}

/* ============ TOP BAR + NAV (trên cùng) ============ */
.topbar{position:sticky;top:0;z-index:30;background:var(--teal);color:#fff;
  box-shadow:var(--shadow);padding-top:env(safe-area-inset-top)}
.topbar-inner{display:flex;align-items:center;gap:18px;
  max-width:var(--maxw);margin:0 auto;padding:10px 20px}
.brand{color:#fff;font-weight:700;font-size:1.1rem;white-space:nowrap;display:flex;align-items:center;gap:6px}

.mainnav{display:flex;align-items:center;gap:4px;flex:1;overflow-x:auto;scrollbar-width:none}
.mainnav::-webkit-scrollbar{display:none}
.nav-item{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;
  color:rgba(255,255,255,.85);padding:8px 14px;border-radius:10px;font-size:.92rem;font-weight:500}
.nav-item:hover{background:rgba(255,255,255,.12);color:#fff}
.nav-item.active{background:#fff;color:var(--teal-d);font-weight:700}
.nav-ico{font-size:1.05rem;line-height:1}

.topbar-right{display:flex;align-items:center;gap:10px;white-space:nowrap;margin-left:auto}
.link-muted{color:rgba(255,255,255,.9);font-size:.85rem}
.link-muted:hover{color:#fff;text-decoration:underline}
.badge{background:rgba(255,255,255,.2);padding:4px 12px;border-radius:999px;font-size:.82rem}
.badge-guest{background:rgba(255,255,255,.12)}

/* Mobile: brand + user trên 1 hàng, menu cuộn ngang hàng dưới */
@media(max-width:760px){
  .topbar-inner{flex-wrap:wrap;gap:10px;padding:10px 14px}
  .brand{font-size:1rem}
  .brand-txt{display:none}            /* chỉ hiện icon để gọn */
  .topbar-right{order:2}
  .mainnav{order:3;flex-basis:100%;gap:6px;padding-bottom:2px;
    margin:2px -14px -4px;padding-left:14px;padding-right:14px}
  .nav-item{padding:7px 12px;font-size:.85rem;background:rgba(255,255,255,.1)}
  .nav-item .nav-txt{display:inline}
}
@media(max-width:380px){
  .nav-item .nav-txt{display:none}    /* màn rất nhỏ: chỉ icon */
  .nav-item{padding:8px 12px;font-size:1rem}
}

/* ============ LAYOUT ============ */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:22px 20px;flex:1}
@media(max-width:760px){.container{padding:14px}}
.appfoot{text-align:center;color:var(--muted);font-size:.78rem;padding:18px}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.card-title{font-size:1rem;color:var(--muted);font-weight:600;margin-bottom:12px}
.section-title{font-size:1.05rem;color:var(--ink);margin:24px 2px 10px;font-weight:700}
.muted{color:var(--muted);font-size:.9rem}

.grid{display:grid;gap:16px}
.grid-balances{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}
.grid-charts{grid-template-columns:1fr 1fr;align-items:start}
@media(max-width:760px){
  .grid{gap:12px}
  .grid-charts{grid-template-columns:1fr}
  .grid-3{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:420px){.grid-3{grid-template-columns:1fr}}

/* ============ FLASH ============ */
.flash{max-width:var(--maxw);margin:12px auto 0;padding:12px 16px;border-radius:12px;font-size:.92rem}
.flash-success{background:#dcfce7;color:#166534}
.flash-error{background:#fee2e2;color:#991b1b}
.flash-info{background:#dbeafe;color:#1e40af}

/* ============ BALANCES ============ */
.balance-card{text-align:center;display:flex;flex-direction:column;justify-content:center}
.balance-card.joint{background:linear-gradient(135deg,var(--teal),var(--teal-d));color:#fff;border:0;padding:22px}
.balance-label{font-size:.9rem;opacity:.9}
.balance-card.joint .balance-value{font-size:1.9rem}
.balance-value{font-size:1.55rem;font-weight:700;margin-top:6px}
@media(max-width:560px){.balance-card.joint{grid-column:1/-1}}
.balance-sub{font-size:.8rem;margin-top:6px;opacity:.85}
.balance-sub.owed{color:var(--amber)}
.muted-card{opacity:.7}

/* ============ STATS ============ */
.stat{text-align:center;padding:16px}
.stat-label{font-size:.82rem;color:var(--muted)}
.stat-value{font-size:1.25rem;font-weight:700;margin-top:5px}
.stat-income .stat-value{color:var(--green)}
.stat-expense .stat-value{color:var(--red)}
.stat-net .stat-value{color:var(--teal-d)}

/* ============ PERIOD NAV ============ */
.period-nav{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:6px;flex-wrap:wrap}
.period-nav-btn{padding:6px 14px;border-radius:10px;background:var(--card);border:1px solid var(--line);
  color:var(--teal-d);font-size:.88rem;white-space:nowrap}
.period-nav-btn:hover{background:var(--teal-l)}
.period-label-center{text-align:center;font-weight:700;font-size:1.1rem;color:var(--ink);margin-bottom:16px}

/* ============ PERIOD / SEGMENTS ============ */
.period-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:12px;flex-wrap:wrap}
.period-label{font-weight:700;color:var(--ink);font-size:1.05rem}
.seg{display:inline-flex;background:#e2e8f0;border-radius:12px;padding:3px;gap:3px}
.seg-btn{border:0;background:transparent;padding:9px 18px;border-radius:9px;
  font-size:.9rem;cursor:pointer;color:var(--muted);text-align:center}
.seg-btn.on{background:#fff;color:var(--ink);font-weight:600;box-shadow:var(--shadow)}
.seg-btn input{display:none}
.seg-type,.seg-fund{display:flex;margin-bottom:16px}
.seg-type .seg-btn,.seg-fund .seg-btn{flex:1}
.scope-toggle{display:flex;gap:8px;margin:0 0 16px}
.chip{padding:8px 18px;border-radius:999px;background:#e2e8f0;color:var(--muted);font-size:.9rem}
.chip.on{background:var(--teal);color:#fff}

/* ============ CHARTS ============ */
.chart-box{position:relative;height:300px}
@media(max-width:760px){.chart-box{height:260px}}

/* ============ FORMS (giới hạn bề ngang trên desktop) ============ */
.form{max-width:580px}
.form.card{margin-left:auto;margin-right:auto}
.form-head{font-size:1.15rem;margin:0 0 16px;text-align:center}
.form .field{display:block;margin-bottom:16px}
.field>span{display:block;font-size:.85rem;color:var(--muted);margin-bottom:6px}
input,select,textarea{width:100%;padding:12px 14px;border:1px solid var(--line);
  border-radius:12px;font-size:16px;font-family:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--teal-l);border-color:var(--teal)}
.amount-input{font-size:1.4rem;font-weight:700;text-align:right}
.check{display:flex;align-items:center;gap:10px;margin-bottom:16px;font-size:.95rem}
.check input{width:auto}
.btn{display:inline-block;text-align:center;border:0;border-radius:12px;padding:13px 22px;
  font-size:1rem;font-weight:600;cursor:pointer;font-family:inherit;transition:filter .15s}
.btn:hover{filter:brightness(.96)}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:active{background:var(--teal-d)}
.btn-ghost{background:#e2e8f0;color:var(--ink)}
.btn-block{display:block;width:100%;margin-top:10px}
.btn-sm{padding:8px 16px;font-size:.85rem}

/* ============ LOGIN ============ */
.login-wrap{min-height:55vh;display:flex;align-items:center;justify-content:center}
.login-card{width:100%;max-width:360px;text-align:center}
.login-title{font-size:1.4rem}
.passcode-input{font-size:2rem;text-align:center;letter-spacing:.5em;margin:18px 0}

/* ============ TRANSACTIONS — TOOLBAR ============ */
.txn-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.txn-filter{display:flex;align-items:center;gap:8px;flex-wrap:wrap;flex:1}
.filter-chips{display:flex;gap:8px;flex-wrap:wrap}
.fc-label{font-size:.78rem;color:var(--muted);display:flex;flex-direction:column;gap:3px}
.fc-label select{padding:7px 10px;font-size:.88rem;border-radius:10px}
.filter-period-label{font-weight:700;font-size:.92rem;color:var(--teal-d);white-space:nowrap}

/* ============ TRANSACTIONS — SUMMARY BAR ============ */
.txn-summary{display:flex;gap:0;margin-bottom:14px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--card)}
.txn-sum-item{flex:1;padding:12px 10px;text-align:center;border-right:1px solid var(--line)}
.txn-sum-item:last-child{border-right:0}
.tsi-label{display:block;font-size:.72rem;color:var(--muted);margin-bottom:3px;text-transform:uppercase;letter-spacing:.03em}
.tsi-val{display:block;font-weight:700;font-size:1rem}
.txn-sum-item.income .tsi-val{color:var(--green)}
.txn-sum-item.expense .tsi-val{color:var(--red)}
.txn-sum-item.net .tsi-val{color:var(--teal-d)}
@media(max-width:480px){
  .txn-summary{flex-wrap:wrap}
  .txn-sum-item{flex:1 0 50%;border-bottom:1px solid var(--line)}
  .txn-sum-item:nth-child(odd){border-right:1px solid var(--line)}
  .txn-sum-item:nth-child(even){border-right:0}
  .txn-sum-item:nth-last-child(-n+2){border-bottom:0}
}

/* ============ TRANSACTIONS — TABLE ============ */
.txn-table-wrap{padding:0;overflow-x:auto;-webkit-overflow-scrolling:touch}
.txn-table{width:100%;border-collapse:collapse;font-size:.88rem}
.txn-table th{background:var(--bg);padding:9px 12px;text-align:left;font-size:.75rem;color:var(--muted);
  text-transform:uppercase;letter-spacing:.04em;border-bottom:2px solid var(--line);white-space:nowrap}
.txn-table td{padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.txn-table tbody tr:last-child td{border-bottom:0}
.txn-table tbody tr:hover{background:#f8fafc}
.txn-table .col-amt{text-align:right;font-weight:700;white-space:nowrap}
.txn-table .col-act{text-align:right;white-space:nowrap}
.txn-table .col-img img{width:38px;height:38px;object-fit:cover;border-radius:6px;border:1px solid var(--line);cursor:zoom-in}
.txn-table .col-note{max-width:180px;font-size:.82rem;color:var(--muted)}
.txn-table .col-fund{text-align:center}
.txn-table .col-muted{color:var(--muted);font-size:.83rem}
.th-label{font-weight:600}
.amt-main{font-weight:700;font-size:.95rem}
.amt-bal{font-size:.75rem;color:var(--muted);white-space:nowrap}
.sortable{cursor:pointer;user-select:none}
.sortable:hover{color:var(--ink)}
.sortable.asc .sort-ico::after{content:'↑';display:inline}
.sortable.desc .sort-ico::after{content:'↓';display:inline}
.sort-ico{color:var(--muted);font-size:.8em;margin-left:2px}
.sortable.asc .sort-ico,.sortable.desc .sort-ico{color:var(--teal-d)}
.pos{color:var(--green)}
.neg{color:var(--red)}
.tag-behalf{background:#fce7f3;color:#9d174d}

.txn-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:4px;align-items:center}
.txn-thumb{display:inline-block;cursor:zoom-in}
.txn-thumb img{width:36px;height:36px;object-fit:cover;border-radius:6px;border:1px solid var(--line)}

/* ============ PLANS / LISTS ============ */
.plan-list{margin-top:4px;display:grid;gap:12px}
.plan{margin-bottom:0;display:flex;justify-content:space-between;gap:14px;align-items:flex-start;padding:16px}
.plan-title{font-weight:600}
.plan-meta{font-size:.82rem;color:var(--muted);margin-top:4px}
.txn-sub{font-size:.82rem;color:var(--teal-d);margin-top:4px}

/* ============ LIGHTBOX (popup ảnh) ============ */
.lightbox{position:fixed;inset:0;z-index:60;background:rgba(15,23,42,.85);
  display:flex;align-items:center;justify-content:center;padding:24px}
.lightbox[hidden]{display:none}
.lightbox img{max-width:92vw;max-height:88vh;width:auto;height:auto;object-fit:contain;
  border-radius:12px;box-shadow:0 12px 48px rgba(0,0,0,.55)}
.lightbox-close{position:absolute;top:14px;right:18px;width:46px;height:46px;border:0;
  border-radius:50%;background:rgba(255,255,255,.16);color:#fff;font-size:1.7rem;cursor:pointer;line-height:1}
.lightbox-close:hover{background:rgba(255,255,255,.3)}
.tag{display:inline-block;font-size:.68rem;padding:2px 8px;border-radius:999px;margin-left:6px;vertical-align:middle}
.tag-joint{background:var(--teal-l);color:var(--teal-d)}
.tag-personal{background:#fef3c7;color:#92400e}
.link-mini{font-size:.82rem;color:var(--muted);background:none;border:0;cursor:pointer;padding:0}
.link-mini:hover{text-decoration:underline}
.link-mini.danger{color:var(--red)}
.empty{text-align:center;color:var(--muted);padding:34px;grid-column:1/-1}

/* ============ FILTER ============ */
.filter-form{max-width:none}
.filter-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:12px}
.filter-row label{font-size:.78rem;color:var(--muted)}
.filter-row select{margin-top:4px;padding:10px}

/* ============ PLANS ============ */
.add-plan{max-width:580px;margin-left:auto;margin-right:auto}
.add-plan summary{cursor:pointer;font-weight:600;color:var(--teal-d)}
.add-plan .form{margin-top:16px;max-width:none}
.plan.overdue{border-left:4px solid var(--red)}
.plan-title.done{text-decoration:line-through;color:var(--muted)}
.plan-actions{display:flex;flex-direction:column;gap:8px;align-items:flex-end}
.plan-done{opacity:.65}

/* ============ SETTINGS ============ */
.settings-cat-list{display:grid;gap:10px}
@media(min-width:900px){.settings-cat-list{grid-template-columns:1fr 1fr}}
.settings-cat-row{display:flex;flex-direction:column;gap:8px;padding:14px}
.settings-cat-form{flex:1}
.settings-cat-fields{display:flex;gap:10px;align-items:end}
.settings-cat-actions{display:flex;gap:8px}
.settings-cat-btns{display:flex;gap:8px;justify-content:flex-end}
.cat-inactive{opacity:.55}

/* ============ PRINT ============ */
@media print{
  .topbar,.appfoot,.no-print,.txn-actions,.btn,.filter-form,.scope-toggle,
  .plan-actions,.lightbox,.modal-overlay,button,
  .txn-toolbar,.txn-mobile-list{display:none!important}
  body{background:#fff;font-size:11pt;color:#000}
  .container{padding:0;max-width:none}
  .card{box-shadow:none;border:1px solid #bbb;break-inside:avoid;margin-bottom:8px}
  .txn-table-wrap{display:block!important;border:1px solid #bbb}
  .txn-table{font-size:10pt}
  .txn-table th{background:#eee;font-size:9pt}
  .txn-table td,.txn-table th{padding:6px 8px}
  .txn-summary{border:1px solid #bbb}
  .grid-charts{grid-template-columns:1fr 1fr}
  .chart-box{height:200px}
  a{color:inherit;text-decoration:none}
  .print-header{display:block!important;text-align:center;margin-bottom:12px;font-size:14pt;font-weight:bold;border-bottom:2px solid #000;padding-bottom:8px}
  .tag{border:1px solid #aaa;background:none;color:#000}
}
.print-header{display:none}

/* ============ DIAGNOSTIC (telegram_test) ============ */
.diag{margin:0;padding-left:18px;line-height:1.8;font-size:.92rem}
.diag code{background:#f1f5f9;padding:1px 6px;border-radius:6px;font-size:.85em;word-break:break-all}
.diag-actions{display:flex;flex-direction:column;gap:10px;max-width:none}
.diag-body{background:#0f172a;color:#cbd5e1;padding:14px;border-radius:12px;
  overflow-x:auto;font-size:.8rem;white-space:pre-wrap;word-break:break-all}

/* ============ MODAL ============ */
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,.5);display:flex;
  align-items:center;justify-content:center;z-index:50;padding:20px}
.modal-overlay[hidden]{display:none}
.modal{background:#fff;border-radius:var(--radius);padding:24px;max-width:380px;width:100%;text-align:center}
.modal-actions{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.modal-close{margin-top:12px;background:none;border:0;color:var(--muted);cursor:pointer;width:auto}