/* Hesapmatik — ledger-inspired accounting UI */
:root{
  --paper:#F5F1E8;
  --paper-2:#ECE6D8;
  --ink:#1B1A17;
  --ink-soft:#5C574F;
  --muted:#8A8378;
  --line:#D4CCBA;
  --line-strong:#BFB6A2;
  --blue:#1E3A5F;
  --blue-soft:#DCE4EE;
  --green:#1F6F43;
  --green-soft:#DCEADE;
  --red:#B42318;
  --red-soft:#F3DDDA;
  --amber:#9A5B16;
  --amber-soft:#F3E6D4;
  --radius:10px;
  --radius-sm:6px;
  --shadow:0 1px 2px rgba(27,26,23,.06),0 4px 16px rgba(27,26,23,.06);
  --font-display:'Fraunces',Georgia,serif;
  --font-body:'DM Sans',system-ui,sans-serif;
  --font-mono:'DM Mono',ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  font-size:15px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:15px}

/* Topbar */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:14px 20px;
  background:var(--ink);color:var(--paper);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:40px;height:40px;border-radius:8px;
  background:var(--paper);color:var(--ink);
  display:grid;place-items:center;font-family:var(--font-display);
  font-size:22px;font-weight:600;
}
.brand h1{margin:0;font-family:var(--font-display);font-size:20px;font-weight:600;letter-spacing:-.01em}
.brand .subtitle{margin:0;font-size:12px;opacity:.7}
.topbar-right{display:flex;align-items:center;gap:10px}
.month-pill{
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  color:var(--paper);padding:6px 12px;border-radius:999px;font-size:13px;
  display:flex;align-items:center;gap:6px;
}
.month-pill input{background:transparent;border:none;color:var(--paper);font-size:13px;cursor:pointer}
.month-pill input::-webkit-calendar-picker-indicator{filter:invert(1);opacity:.8}
.icon-btn{background:transparent;border:none;color:var(--paper);font-size:18px;padding:6px 8px;border-radius:6px}
.icon-btn:hover{background:rgba(255,255,255,.1)}

/* Tabs */
.tabs{
  display:flex;gap:2px;padding:8px 16px 0;
  background:var(--paper);border-bottom:1px solid var(--line);
  overflow-x:auto;scrollbar-width:none;
}
.tabs::-webkit-scrollbar{display:none}
.tab{
  background:transparent;border:none;color:var(--ink-soft);
  padding:10px 14px;font-size:14px;font-weight:500;
  border-bottom:2px solid transparent;white-space:nowrap;
  transition:color .15s,border-color .15s;
}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--ink);border-bottom-color:var(--blue)}

/* Main */
main#content{padding:20px;max-width:1200px;margin:0 auto}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.section-head h2{margin:0;font-family:var(--font-display);font-size:22px;font-weight:600}
.section-head .actions{display:flex;gap:8px;flex-wrap:wrap}

/* Cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.card + .card{margin-top:12px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:16px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.stat .label{font-size:12px;color:var(--ink-soft);text-transform:none;letter-spacing:0;margin-bottom:4px}
.stat .value{font-family:var(--font-mono);font-size:22px;font-weight:500;letter-spacing:-.02em}
.stat .value.pos{color:var(--green)}
.stat .value.neg{color:var(--red)}
.stat .sub{font-size:12px;color:var(--muted);margin-top:2px}

/* Buttons */
.btn{border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 14px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;display:inline-flex;align-items:center;gap:6px;transition:all .15s}
.btn:hover{border-color:var(--line-strong);background:var(--paper)}
.btn.primary{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn.primary:hover{background:#162d4a;border-color:#162d4a}
.btn.danger{background:var(--red);color:#fff;border-color:var(--red)}
.btn.ghost{background:transparent;border-color:transparent}
.btn.ghost:hover{background:var(--paper)}
.btn.sm{padding:4px 8px;font-size:12px}

/* Form */
.modal-overlay{position:fixed;inset:0;background:rgba(27,26,23,.45);display:none;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal-overlay.open{display:flex}
.modal{background:#fff;border-radius:12px;width:100%;max-width:560px;max-height:90vh;overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.modal-header h2{margin:0;font-family:var(--font-display);font-size:18px}
.modal-body{padding:20px;display:grid;gap:14px}
.modal-footer{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px}
.field{display:flex;flex-direction:column;gap:4px}
.field label{font-size:13px;font-weight:500;color:var(--ink-soft)}
.field input,.field select,.field textarea{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:9px 11px;background:#fff;color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.field textarea{min-height:70px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:520px){.field-row{grid-template-columns:1fr}}

/* Tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}
th{background:var(--paper-2);font-weight:600;font-size:12px;color:var(--ink-soft);text-transform:none;letter-spacing:0;white-space:nowrap}
td.num,th.num{text-align:right;font-family:var(--font-mono);font-variant-numeric:tabular-nums}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--paper)}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600}
.badge.green{background:var(--green-soft);color:var(--green)}
.badge.red{background:var(--red-soft);color:var(--red)}
.badge.amber{background:var(--amber-soft);color:var(--amber)}
.badge.blue{background:var(--blue-soft);color:var(--blue)}
.badge.gray{background:var(--paper-2);color:var(--ink-soft)}

/* Toast */
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--paper);padding:10px 18px;border-radius:8px;font-size:14px;opacity:0;pointer-events:none;transition:all .2s;z-index:60}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Empty state */
.empty{text-align:center;padding:40px 20px;color:var(--muted)}
.empty .icon{font-size:36px;margin-bottom:8px}

/* Filters */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;align-items:center}
.filters input,.filters select{border:1px solid var(--line);border-radius:var(--radius-sm);padding:7px 10px;background:#fff}

/* Chart */
.chart{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.chart svg{width:100%;height:auto;display:block}
.chart-legend{display:flex;gap:16px;margin-top:8px;font-size:12px;color:var(--ink-soft)}
.chart-legend span{display:flex;align-items:center;gap:6px}
.dot{width:10px;height:10px;border-radius:2px;display:inline-block}

/* Due list */
.due-item{display:flex;align-items:center;gap:12px;padding:12px;border-bottom:1px solid var(--line)}
.due-item:last-child{border-bottom:none}
.due-date{font-family:var(--font-mono);font-size:13px;min-width:90px;color:var(--ink-soft)}
.due-main{flex:1}
.due-main .title{font-weight:500}
.due-main .meta{font-size:12px;color:var(--muted)}
.due-amount{font-family:var(--font-mono);font-weight:500}

/* Settings */
.settings-list{display:grid;gap:12px}

/* Mobile */
@media(max-width:640px){
  .topbar{padding:12px 14px}
  .brand h1{font-size:17px}
  main#content{padding:14px}
  .stat-grid{grid-template-columns:1fr 1fr}
  .stat .value{font-size:18px}
  th,td{padding:8px 10px;font-size:13px}
}
@media(max-width:420px){
  .stat-grid{grid-template-columns:1fr}
}
/* Login gate */
.login-overlay{position:fixed;inset:0;background:var(--paper);display:grid;place-items:center;z-index:100;padding:16px}
.login-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px 24px;width:100%;max-width:360px;box-shadow:var(--shadow);text-align:center}
.login-card h1{margin:0 0 2px;font-family:var(--font-display);font-size:22px}
.login-card .subtitle{margin:0 0 18px;color:var(--ink-soft);font-size:13px}
.login-card .field{text-align:left;margin-bottom:12px}
.login-err{color:var(--red);font-size:13px;min-height:18px;margin:4px 0 8px}