:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f4f6fb;
  --card-bg: #ffffff;
  --text: #1e2430;
  --muted: #6b7280;
  --border: #e5e7eb;
  --success: #16a34a;
  --danger: #dc2626;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans Bengali", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.navbar {
  background: var(--card-bg);
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.nav-top { display: flex; justify-content: space-between; align-items: center; }
.navbar .brand { font-weight: 700; font-size: 18px; }
.nav-toggle {
  display: none;
  background: none; border: none; font-size: 22px; cursor: pointer;
}
.nav-links { display: flex; }
.nav-links a {
  margin-left: 18px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  padding: 6px 0;
}
.nav-links a:hover { color: var(--primary); }

@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    flex-direction: column;
    margin-top: 12px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { margin-left: 0; padding: 10px 0; border-bottom: 1px solid var(--border); }
  .container { padding: 14px; }
  .detail-header { flex-direction: column; align-items: stretch; }
  .actions { flex-wrap: wrap; }
  .row { flex-direction: column; gap: 0; }
}

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

details.panel summary { cursor: pointer; list-style: none; }
details.panel summary::-webkit-details-marker { display: none; }
details summary { cursor: pointer; }

.container { max-width: 960px; margin: 0 auto; padding: 24px; }

h1 { font-size: 24px; margin-bottom: 8px; }
h3 { margin-top: 0; }
.muted { color: var(--muted); font-size: 14px; }

.flash {
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}
.flash-success { background: #dcfce7; color: #166534; }
.flash-error { background: #fee2e2; color: #991b1b; }

.login-box {
  max-width: 360px;
  margin: 80px auto;
  background: var(--card-bg);
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  text-align: center;
}

label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 6px; }
input[type=text], input[type=password], input[type=number], textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
textarea { resize: vertical; }

.row { display: flex; gap: 16px; }
.row > div { flex: 1; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  margin-top: 16px;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #e5e7eb; color: var(--text); }
.btn-danger { background: var(--danger); color: white; }

.form-card, .panel {
  background: var(--card-bg);
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
  margin-bottom: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card-bg);
  padding: 18px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
  text-decoration: none;
  color: var(--text);
  display: block;
}
.card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.card-top { display: flex; justify-content: space-between; align-items: center; }
.service { margin: 6px 0 2px; font-size: 14px; }

.badge {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}
.badge-active { background: #dcfce7; color: #166534; }
.badge-closed { background: #f3f4f6; color: #6b7280; }

.stat-row {
  display: flex;
  gap: 14px;
  font-size: 13px;
  margin-top: 10px;
  color: var(--muted);
}

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.actions { display: flex; gap: 10px; align-items: flex-start; }

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 14px;
}
.table th, .table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.table th { color: var(--muted); font-weight: 600; }

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text);
}

.task-fields { border-left: 3px solid var(--primary); padding-left: 12px; margin: 10px 0; }

/* ---------------- Mobile responsiveness ---------------- */
@media (max-width: 720px) {
  .navbar { padding: 12px 16px; position: relative; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px 16px;
    z-index: 20;
  }
  .nav-links.open { display: flex; }
  .nav-links a { margin: 8px 0; font-size: 15px; }

  .container { padding: 14px; }
  h1 { font-size: 20px; }

  .row { flex-direction: column; gap: 0; }
  .form-card, .panel { padding: 16px; }

  .detail-header { flex-direction: column; align-items: stretch; }
  .actions { flex-direction: column; }
  .actions form, .actions a { width: 100%; }
  .actions .btn { width: 100%; text-align: center; }

  .table { font-size: 13px; }
  .table th, .table td { padding: 6px; }

  .grid { grid-template-columns: 1fr; }
}