:root{
  /* 본문(라이트) */
  --bg:#F8F5EC;
  --surface-1:#FFFFFF;
  --surface-2:#F1ECDC;
  --surface-3:#E7DFC4;
  --border:rgba(30,35,51,0.10);
  --border-strong:rgba(178,127,15,0.45);
  --text-primary:#1E2333;
  --text-secondary:#5B5F6E;
  --text-muted:#8D8F9C;
  --gold:#B8860B;
  --gold-ink:#FFFFFF;
  --success:#1D9A5C;
  --warning:#C1670E;
  --danger:#C1443B;
  /* 사이드바(다크 스파인) */
  --spine-bg:#12172A;
  --spine-surface:#1A2138;
  --spine-surface-2:#212B47;
  --spine-border:rgba(232,184,75,0.18);
  --spine-text:#F2EFE4;
  --spine-text-secondary:#ABB2C7;
  --spine-text-muted:#6E7690;
  --spine-gold:#E8B84B;

  --font-serif:'Paperlogy', var(--font-sans);
  --font-sans:'Pretendard Variable','Pretendard',-apple-system,'Apple SD Gothic Neo',sans-serif;
  --font-mono:var(--font-sans);
  --radius:10px;
  --shadow-xs:0 1px 2px rgba(30,35,51,0.05);
  --shadow-sm:0 1px 3px rgba(30,35,51,0.07), 0 1px 2px rgba(30,35,51,0.05);
  --shadow-md:0 8px 24px rgba(30,35,51,0.10), 0 2px 6px rgba(30,35,51,0.06);
  --shadow-gold:0 2px 8px rgba(184,134,11,0.28);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{overflow-y:scroll;scrollbar-gutter:stable;}
body{
  margin:0;color:var(--text-primary);font-family:var(--font-sans);
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(30,35,51,0.035) 1px, transparent 1px);
  background-size:100% 34px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
  line-height:1.55;
}
p{margin:0;}
button, input, select, textarea, .stamp, .nav-item, .metric-value, .name-line, h1, h2, h3{line-height:1.3;}
::selection{background:var(--gold);color:var(--gold-ink);}

.app{display:flex;min-height:100vh;}

/* ---- 사이드바(책등 컨셉, 항상 다크) ---- */
.sidebar{
  width:220px;flex-shrink:0;background:var(--spine-bg);border-right:1px solid var(--spine-border);
  padding:28px 16px;display:flex;flex-direction:column;gap:28px;
  box-shadow:2px 0 16px rgba(0,0,0,0.18);position:sticky;top:0;align-self:flex-start;z-index:10;
  min-height:100vh;max-height:100vh;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 8px;}
.brand-mark{
  width:34px;height:34px;border-radius:50%;border:1.5px solid var(--spine-gold);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  font-family:var(--font-serif);font-size:15px;color:var(--spine-gold);
  box-shadow:0 0 0 3px rgba(232,184,75,0.08), 0 0 12px rgba(232,184,75,0.15);
}
.brand-text{font-family:var(--font-serif);font-size:15px;font-weight:700;letter-spacing:0.01em;color:var(--spine-text);line-height:1.25;}
.brand-sub{font-size:10.5px;color:var(--spine-text-muted);letter-spacing:0.14em;text-transform:uppercase;margin-top:1px;font-family:var(--font-mono);}

.nav{display:flex;flex-direction:column;gap:2px;}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;
  color:var(--spine-text-secondary);font-size:14px;cursor:pointer;border:none;background:none;
  text-align:left;width:100%;font-family:var(--font-sans);transition:background .18s var(--ease),color .18s var(--ease);
  position:relative;
}
.nav-item svg{width:17px;height:17px;flex-shrink:0;opacity:.8;transition:opacity .18s;}
.nav-item:hover{background:var(--spine-surface);color:var(--spine-text);}
.nav-item.active{background:var(--spine-surface-2);color:var(--spine-gold);}
.nav-item.active::before{
  content:"";position:absolute;left:-16px;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:0 3px 3px 0;background:var(--spine-gold);
}
.nav-item.active svg{opacity:1;}
.nav-badge{
  margin-left:auto;font-size:10px;background:var(--danger);color:#fff;border-radius:99px;
  padding:1px 6px;font-family:var(--font-mono);
}

.sidebar-foot{margin-top:auto;padding:12px;border-top:1px solid var(--spine-border);}
.sidebar-foot p{font-size:11.5px;color:var(--spine-text-muted);margin:0;line-height:1.6;}
.sidebar-user{
  font-size:11.5px;color:var(--spine-text-secondary);padding:6px 4px 8px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--font-mono);
}
.footer-links{display:flex;flex-direction:column;gap:2px;}
.footer-links button{
  background:none;border:none;text-align:left;padding:5px 4px;font-size:11.5px;
  color:var(--spine-text-muted);cursor:pointer;font-family:var(--font-sans);border-radius:6px;
  transition:color .15s,background .15s;
}
.footer-links button:hover{color:var(--spine-gold);background:var(--spine-surface);}
.sidebar-foot .btn{color:var(--spine-text-secondary);border-color:var(--spine-border);}
.sidebar-foot .btn:hover{background:var(--spine-surface);color:var(--spine-gold);border-color:var(--spine-gold);}
.btn-link-sm{background:none;border:none;color:var(--gold);font-size:12.5px;cursor:pointer;padding:0;font-family:var(--font-sans);}
.btn-link-sm:hover{text-decoration:underline;}
.page-footer-links{
  display:none;justify-content:center;align-items:center;gap:10px;
  margin-top:32px;padding-top:18px;border-top:1px dashed var(--border);
}
.page-footer-links button{background:none;border:none;color:var(--text-muted);font-size:12px;cursor:pointer;padding:4px;font-family:var(--font-sans);}
.page-footer-links button:hover{color:var(--gold);}
.page-footer-links span{color:var(--border-strong);font-size:12px;}

/* ---- 메인 ---- */
.main{flex:1;padding:32px 40px 60px;max-width:1080px;}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;flex-wrap:wrap;gap:14px;}
.page-title{font-family:var(--font-serif);font-size:26px;margin:0;}
.page-sub{color:var(--text-secondary);font-size:13px;margin:4px 0 0;}

.month-nav{display:flex;align-items:center;gap:10px;background:var(--surface-1);border:1px solid var(--border);border-radius:99px;padding:6px 8px;box-shadow:var(--shadow-xs);}

.segmented{display:flex;background:var(--surface-2);border:1px solid var(--border);border-radius:99px;padding:3px;box-shadow:var(--shadow-xs);flex-shrink:0;}
.seg-btn{background:none;border:none;padding:7px 13px;font-size:12.5px;border-radius:99px;color:var(--text-secondary);cursor:pointer;transition:background .15s var(--ease),color .15s;white-space:nowrap;font-family:var(--font-mono);}
.seg-btn.active{background:var(--gold);color:var(--gold-ink);font-weight:600;box-shadow:var(--shadow-gold);}
.topbar-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.month-nav button{background:none;border:none;color:var(--text-secondary);cursor:pointer;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;}
.month-nav button:hover{background:var(--surface-3);color:var(--gold);}
.month-nav span{font-family:var(--font-mono);font-size:13px;min-width:64px;text-align:center;}

.btn{
  background:var(--surface-2);border:1px solid var(--border-strong);color:var(--text-primary);
  padding:9px 16px;border-radius:8px;font-size:13px;cursor:pointer;font-family:var(--font-sans);
  display:inline-flex;align-items:center;gap:6px;transition:transform .12s var(--ease), background .15s, box-shadow .15s;
}
.btn:hover{background:var(--surface-3);}
.btn:active{transform:scale(0.97);}
.btn-gold{
  background:linear-gradient(180deg, #C6980F, var(--gold));color:var(--gold-ink);border-color:var(--gold);
  font-weight:600;box-shadow:var(--shadow-gold);
}
.btn-gold:hover{background:linear-gradient(180deg, #B3870D, #A5760A);box-shadow:0 3px 12px rgba(184,134,11,0.35);}
.btn-ghost{background:none;border:1px solid var(--border);}
.btn-sm{padding:6px 11px;font-size:12px;}

/* ---- 카드 / 메트릭 ---- */
.grid-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px;}
.metric-card{
  background:var(--surface-1);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px 18px 16px;position:relative;overflow:hidden;cursor:pointer;
  box-shadow:var(--shadow-xs);transition:border-color .15s, box-shadow .2s var(--ease), transform .2s var(--ease);
}
.metric-card:hover{border-color:var(--border-strong);box-shadow:var(--shadow-md);transform:translateY(-2px);}
.metric-card::after{
  content:"";position:absolute;top:-30px;right:-30px;width:80px;height:80px;
  background:radial-gradient(circle, var(--gold) 0%, transparent 70%);opacity:.08;
}
.metric-label{font-size:12px;color:var(--text-secondary);margin:0 0 8px;letter-spacing:0.01em;}
.metric-value{font-family:var(--font-mono);font-size:26px;font-weight:600;margin:0;text-align:right;}
.metric-value.danger{color:var(--danger);}
.metric-value.gold{color:var(--gold);}

.section{margin-bottom:32px;}
.section-title{
  font-family:var(--font-serif);font-size:16px;margin:0 0 14px;display:flex;align-items:center;
  justify-content:space-between;padding-left:12px;position:relative;
}
.section-title::before{
  content:"";position:absolute;left:0;top:2px;bottom:2px;width:3px;border-radius:2px;background:var(--gold);opacity:.6;
}
.section-title small{font-family:var(--font-sans);font-size:12px;color:var(--text-muted);font-weight:400;}

.card{background:var(--surface-1);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow-xs);}
.divider-list > *{border-bottom:1px dashed var(--border);padding:14px 2px;}
.divider-list > *:last-child{border-bottom:none;}

/* ---- 계약 핵심 정보 타일 ---- */
.contract-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:14px 0 4px;}
.stat-tile{background:var(--surface-2);border-radius:8px;padding:10px 12px;}
.stat-tile .stat-label{font-size:10.5px;color:var(--text-muted);letter-spacing:.03em;margin:0 0 4px;text-transform:uppercase;font-weight:500;}
.stat-tile .stat-value{font-family:var(--font-mono);font-size:15px;font-weight:700;margin:0;color:var(--text-primary);line-height:1.35;text-align:right;}
.stat-tile .stat-dday{font-size:12px;font-weight:700;margin:4px 0 0;font-family:var(--font-mono);text-align:right;}

.card-actions-text{display:flex;flex-wrap:wrap;gap:1px;margin-top:14px;padding-top:12px;border-top:1px dashed var(--border);}
.card-actions-text button{background:none;border:none;color:var(--gold);font-size:12.5px;cursor:pointer;padding:5px 10px;font-family:var(--font-sans);border-radius:6px;transition:background .15s;}
.card-actions-text button:hover{background:var(--surface-2);}
.card-actions-text button.text-danger{color:var(--danger);}
.card-actions-text button.text-muted{color:var(--text-secondary);}

/* ---- 스탬프 뱃지 (시그니처 요소) ---- */
.stamp{
  display:inline-flex;align-items:center;gap:5px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:0.04em;padding:4px 10px 4px 8px;border-radius:99px;border:1.5px solid;
  text-transform:uppercase;transform:rotate(-1.5deg);box-shadow:0 0 0 1.5px currentColor inset;
  opacity:.92;
}
.stamp::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;}
.stamp-paid{color:var(--success);border-color:var(--success);background:rgba(29,154,92,0.09);}
.stamp-partial{color:var(--warning);border-color:var(--warning);background:rgba(193,103,14,0.10);}
.stamp-unpaid{color:var(--danger);border-color:var(--danger);background:rgba(193,68,59,0.09);}
.stamp-unknown{color:var(--text-muted);border-color:var(--text-muted);background:rgba(141,143,156,0.09);}
.stamp-wait{color:var(--warning);border-color:var(--warning);background:rgba(193,103,14,0.10);}
.stamp-progress{color:#3D5FC4;border-color:#3D5FC4;background:rgba(61,95,196,0.09);}
.stamp-done{color:var(--success);border-color:var(--success);background:rgba(29,154,92,0.09);}

.row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;}
button.link{background:none;border:none;padding:0;text-align:left;cursor:pointer;color:inherit;font-family:inherit;}
.name-line{font-size:14px;margin:0;font-family:var(--font-serif);}
.name-line .muted{color:var(--text-muted);font-size:12px;}
.sub-line{font-size:12px;color:var(--text-secondary);margin:3px 0 0;font-family:var(--font-mono);}
.phone-link{
  display:inline-flex;align-items:center;gap:4px;font-size:13px;color:var(--gold);
  text-decoration:none;font-family:var(--font-sans);padding:2px 4px;margin:2px -4px 0;border-radius:6px;
  transition:background .15s;
}
.phone-link:hover, .phone-link:active{background:var(--surface-2);}
.phone-link svg{width:13px;height:13px;flex-shrink:0;}
.actions{display:flex;gap:8px;align-items:center;}

.empty{
  color:var(--text-muted);font-size:13px;padding:36px 20px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:6px;
}
.empty::before{
  content:"";width:30px;height:30px;background-color:var(--gold);opacity:.22;
  -webkit-mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.6'%3E%3Cpath d='M4 5c3-1.5 6-1.5 8 0v14c-2-1.5-5-1.5-8 0V5z'/%3E%3Cpath d='M20 5c-3-1.5-6-1.5-8 0v14c2-1.5 5-1.5 8 0V5z'/%3E%3C/svg%3E");
  mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.6'%3E%3Cpath d='M4 5c3-1.5 6-1.5 8 0v14c-2-1.5-5-1.5-8 0V5z'/%3E%3Cpath d='M20 5c-3-1.5-6-1.5-8 0v14c2-1.5 5-1.5 8 0V5z'/%3E%3C/svg%3E");
  -webkit-mask-size:contain;mask-size:contain;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-position:center;mask-position:center;
}

/* ---- 모달 ---- */
.modal-overlay{
  position:fixed;inset:0;background:rgba(6,8,16,0.72);display:flex;align-items:center;justify-content:center;
  z-index:100;padding:20px;opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s var(--ease), visibility .2s;
}
.modal-overlay.open{opacity:1;visibility:visible;pointer-events:auto;}
.modal{
  background:var(--surface-1);border:1px solid var(--border-strong);border-radius:14px;
  padding:24px;width:420px;max-width:100%;max-height:85vh;overflow-y:auto;
  box-shadow:var(--shadow-md);transform:scale(.95) translateY(6px);transition:transform .22s var(--ease);
}
.modal-overlay.open .modal{transform:scale(1) translateY(0);}
.modal h3{font-family:var(--font-serif);font-size:18px;margin:0 0 4px;}
.modal p.hint{font-size:12px;color:var(--text-secondary);margin:0 0 18px;}
.field{margin-bottom:12px;}
.field label{display:block;font-size:12.5px;color:var(--text-secondary);margin-bottom:5px;}
.field input, .field select, .field textarea{
  width:100%;background:var(--surface-2);border:1px solid var(--border);border-radius:7px;
  color:var(--text-primary);padding:9px 10px;font-size:13px;font-family:var(--font-sans);
  transition:border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(184,134,11,0.14);}
.auth-screen{display:flex;align-items:center;justify-content:center;min-height:70vh;}
.auth-card{width:100%;max-width:360px;}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.checkbox-row{display:flex;align-items:center;gap:8px;font-size:13px;margin-bottom:14px;color:var(--text-secondary);}
.reminder-preview{
  background:var(--surface-2);border-radius:8px;padding:14px;font-size:13px;line-height:1.65;
  margin-bottom:16px;border-left:2px solid var(--gold);
}
.modal-actions{display:flex;gap:8px;margin-top:8px;}
.modal-actions .btn{flex:1;justify-content:center;}

/* ---- 세입자 상세 ---- */
.back-btn{background:none;border:none;color:var(--text-secondary);font-size:13px;display:flex;align-items:center;gap:6px;cursor:pointer;margin-bottom:20px;padding:0;font-family:var(--font-sans);transition:color .15s, transform .15s;}
.back-btn:hover{color:var(--gold);transform:translateX(-2px);}
.detail-head{margin-bottom:26px;}
.detail-head h2{font-family:var(--font-serif);font-size:24px;margin:0 0 6px;}
.detail-head p{font-size:13px;color:var(--text-secondary);margin:3px 0;font-family:var(--font-mono);}

.chart-wrap{background:var(--surface-1);border:1px solid var(--border);border-radius:var(--radius);padding:18px;height:240px;box-shadow:var(--shadow-xs);}
.legend{display:flex;gap:18px;margin-bottom:12px;font-size:12px;color:var(--text-secondary);}
.legend span{display:flex;align-items:center;gap:6px;}
.legend i{width:9px;height:9px;border-radius:2px;display:inline-block;}

.page-in{animation:pageIn .28s var(--ease);}
@keyframes pageIn{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:translateY(0);}}
@media (prefers-reduced-motion: reduce){
  .page-in{animation:none;}
  .modal, .modal-overlay, .metric-card, .back-btn{transition:none;}
}

@media (max-width: 820px){
  .sidebar{
    position:fixed;bottom:0;left:0;right:0;width:100%;flex-direction:row;justify-content:space-around;
    padding:8px 4px calc(8px + env(safe-area-inset-bottom));z-index:50;border-top:1px solid var(--spine-border);border-right:none;
    background:rgba(18,23,42,0.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    box-shadow:0 -4px 20px rgba(0,0,0,0.22);
  }
  .brand,.sidebar-foot{display:none;}
  .nav{flex-direction:row;width:100%;justify-content:space-around;}
  .nav-item{flex-direction:column;font-size:10px;gap:3px;padding:7px 6px;min-width:46px;border-radius:10px;transition:background .15s,color .15s,transform .1s;}
  .nav-item:active{transform:scale(0.94);}
  .nav-item svg{width:19px;height:19px;}
  .nav-item.active::before{display:none;}
  .nav-badge{position:absolute;top:2px;right:14%;box-shadow:0 0 0 2px var(--spine-bg);}
  .main{padding:18px 14px calc(84px + env(safe-area-inset-bottom));}
  .topbar{margin-bottom:20px;}
  .topbar > .btn{width:100%;justify-content:center;}
  .topbar-actions{width:100%;}
  .topbar-actions .btn{flex:1;justify-content:center;}
  .segmented{flex:1;}
  .seg-btn{flex:1;text-align:center;}
  .page-title{font-size:21px;}
  .month-nav{width:100%;justify-content:space-between;}
  .grid-metrics{grid-template-columns:repeat(2,1fr);gap:10px;}
  .contract-stats{grid-template-columns:repeat(2,1fr);}
  .metric-card{padding:14px 14px 12px;}
  .metric-card:hover{transform:none;}
  .metric-card:active{transform:scale(0.98);}
  .metric-value{font-size:21px;}
  .field-row{grid-template-columns:1fr;}
  .btn{padding:11px 16px;}

  /* 모달 → 바텀시트 패턴 */
  .modal-overlay{align-items:flex-end;padding:0;}
  .modal{
    width:100%;max-width:100%;border-radius:18px 18px 0 0;
    padding:14px 20px calc(22px + env(safe-area-inset-bottom));max-height:88vh;
    transform:translateY(100%);
  }
  .modal-overlay.open .modal{transform:translateY(0);}
  .modal::before{
    content:"";display:block;width:36px;height:4px;border-radius:99px;
    background:var(--border-strong);margin:0 auto 16px;opacity:.6;
  }
  .actions{width:100%;justify-content:flex-end;}
  .row{gap:8px;}
  .chart-wrap{height:210px;}
  .empty::before{font-size:24px;}
  .page-footer-links{display:flex;}
}
@media (max-width: 820px) and (prefers-reduced-motion: reduce){
  .modal{transition:none;}
}