:root {
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #1d4ed8;
  --primary-dark: #1e40af;
  --green: #16a34a;
  --green-bg: #dcfce7;
  --blue: #2563eb;
  --blue-bg: #dbeafe;
  --yellow: #ca8a04;
  --yellow-bg: #fef9c3;
  --red: #dc2626;
  --red-bg: #fee2e2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Hind Siliguri', 'Noto Sans Bengali', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.main { padding: 24px 16px 64px; }

h1 { font-size: 26px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 0 0 12px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.pre { white-space: pre-line; }

/* ---- নেভিগেশন ---- */
.topnav { background: #0f172a; color: #fff; }
.nav-inner { display: flex; align-items: center; gap: 24px; min-height: 56px; flex-wrap: wrap; }
.brand { color: #fff; font-weight: 700; font-size: 18px; }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 4px; flex: 1; }
.nav-links a { color: #cbd5e1; padding: 6px 12px; border-radius: 8px; }
.nav-links a:hover { background: #1e293b; color: #fff; text-decoration: none; }
.nav-user { display: flex; align-items: center; gap: 10px; margin: 0; }

/* ---- কার্ড, টেবিল ---- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.page-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 600; font-size: 14px; }
.table tr:last-child td { border-bottom: none; }

.dl { display: grid; grid-template-columns: 140px 1fr; gap: 6px 16px; margin: 0; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }

/* ---- স্ট্যাট ---- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat-num { font-size: 26px; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 14px; }
.stat-green .stat-num { color: var(--green); }
.stat-blue .stat-num { color: var(--blue); }
.stat-yellow .stat-num { color: var(--yellow); }

/* ---- ব্যাজ ---- */
.badge { display: inline-block; padding: 2px 10px; border-radius: 99px; font-size: 13px; font-weight: 600; }
.badge-green { background: var(--green-bg); color: var(--green); }
.badge-blue { background: var(--blue-bg); color: var(--blue); }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow); }
.badge-gray { background: var(--border); color: var(--muted); }

/* ---- ইউনিট গ্রিড ---- */
.floor-section { margin-bottom: 24px; }
.floor-title { font-size: 16px; color: var(--muted); border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.unit-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.unit-card {
  display: block; border-radius: 12px; padding: 14px;
  border: 2px solid transparent; color: var(--text);
}
.unit-card:hover { text-decoration: none; filter: brightness(0.97); }
.unit-no { font-size: 18px; font-weight: 700; }
.unit-type, .unit-status, .unit-tenant, .unit-rent { font-size: 13px; }
.unit-tenant { font-weight: 600; margin-top: 4px; }
.unit-vacant { background: var(--green-bg); border-color: #86efac; }
.unit-vacant .unit-status { color: var(--green); font-weight: 700; }
.unit-occupied { background: var(--blue-bg); border-color: #93c5fd; }
.unit-occupied .unit-status { color: var(--blue); font-weight: 700; }
.unit-maint { background: var(--yellow-bg); border-color: #fde047; }
.unit-maint .unit-status { color: var(--yellow); font-weight: 700; }

.legend { display: flex; gap: 18px; margin-bottom: 16px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--muted); }
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.dot-green { background: var(--green); }
.dot-blue { background: var(--blue); }
.dot-yellow { background: var(--yellow); }

/* ---- ফর্ম ---- */
.form label { display: block; margin-bottom: 14px; font-weight: 600; font-size: 14px; }
.form input, .form select, .form textarea {
  display: block; width: 100%; margin-top: 4px;
  padding: 9px 12px; font: inherit; font-weight: 400;
  border: 1px solid var(--border); border-radius: 8px; background: #fff;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: 2px solid var(--primary); outline-offset: -1px; border-color: var(--primary);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.form h2 { margin-top: 10px; padding-top: 14px; border-top: 1px solid var(--border); }
.form h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.form-actions { display: flex; gap: 10px; margin-top: 8px; }

/* ---- বাটন ---- */
.btn {
  display: inline-block; padding: 9px 18px; border-radius: 8px;
  border: 1px solid transparent; font: inherit; font-weight: 600; font-size: 15px;
  cursor: pointer; text-align: center;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: #fff; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: var(--bg); }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 5px 12px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---- অ্যালার্ট ---- */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; }
.alert-error { background: var(--red-bg); color: var(--red); }
.alert-ok { background: var(--green-bg); color: var(--green); }

.check-label { display: flex; align-items: center; gap: 8px; }
.check-label input { width: auto; margin: 0; }

/* ---- লগইন ---- */
.login-wrap { display: flex; justify-content: center; padding-top: 10vh; }
.login-card { width: 100%; max-width: 380px; }
.login-title { text-align: center; margin-bottom: 4px; }
.login-card .muted { margin-top: 0; margin-bottom: 20px; }

/* ---- ভাড়া আদায় ---- */
.text-red { color: var(--red); }
.text-green { color: var(--green); }
.badge-red { background: var(--red-bg); color: var(--red); }
.stat-red .stat-num { color: var(--red); }

.month-nav { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding: 12px 20px; }
.month-form { margin: 0; }
.month-form input { padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px; font: inherit; }
.month-totals { margin-left: auto; font-size: 14px; }

.pay-form { display: flex; gap: 6px; align-items: center; margin: 0; }
.pay-form input[type="number"] { width: 90px; padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; font: inherit; }
.pay-form select { padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; font: inherit; }
.receipt-link { display: inline-block; font-size: 13px; margin-right: 8px; }

/* ---- রসিদ ---- */
.receipt-body { background: #e2e8f0; padding: 24px 16px; }
.receipt-actions { max-width: 560px; margin: 0 auto 16px; display: flex; gap: 10px; }
.receipt {
  max-width: 560px; margin: 0 auto; background: #fff;
  border: 1px solid var(--border); border-radius: 12px; padding: 28px;
}
.receipt-head { text-align: center; margin-bottom: 16px; }
.receipt-head h1 { font-size: 24px; margin: 0; }
.receipt-title {
  display: inline-block; margin-top: 10px; padding: 4px 18px;
  border: 1px solid var(--text); border-radius: 99px; font-weight: 600;
}
.receipt-meta { display: flex; justify-content: space-between; margin-bottom: 12px; font-size: 15px; }
.receipt-table { width: 100%; border-collapse: collapse; margin-bottom: 36px; }
.receipt-table td { border: 1px solid var(--border); padding: 9px 12px; }
.receipt-table td:first-child { color: var(--muted); width: 42%; }
.receipt-sign { display: flex; justify-content: space-between; gap: 40px; text-align: center; font-size: 14px; color: var(--muted); }
.receipt-sign > div { flex: 1; }
.sign-line { border-top: 1px dashed var(--muted); margin-bottom: 6px; padding-top: 4px; }

@media print {
  .receipt-body { background: #fff; padding: 0; }
  .receipt-actions { display: none; }
  .receipt { border: none; max-width: none; }
}

/* ---- ডকুমেন্ট ---- */
.doc-list { display: flex; flex-direction: column; gap: 10px; }
.doc-link { font-weight: 600; }
.doc-missing { color: var(--muted); font-weight: 400; }