:root {
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-soft: #eff6ff;
  --text: #18181b;
  --text-muted: #71717a;
  --text-faint: #a1a1aa;
  --border: #e4e4e7;
  --bg: #f4f4f5;
  --surface: #ffffff;
  --danger: #dc2626;
  --success: #16a34a;
}

body {
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

/* ---------- Layout ---------- */
.app-shell { display: flex; height: 100vh; overflow: hidden; }
.sidebar {
  width: 250px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  transition: width .15s ease;
}
.sidebar.collapsed { width: 76px; }
.sidebar.collapsed .sidebar-label,
.sidebar.collapsed .brand-text,
.sidebar.collapsed .user-text { display: none; }
.sidebar-brand {
  height: 60px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar-brand .logo-box {
  width: 34px; height: 34px; flex-shrink: 0; border-radius: 9px;
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 2px rgba(37,99,235,.4);
}
.brand-text strong { font-size: 15px; letter-spacing: -.01em; }
.brand-text small { font-size: 11px; color: var(--text-faint); display: block; }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 8px 10px 16px; }
.nav-section-label {
  padding: 14px 8px 6px; font-size: 11px; font-weight: 600;
  letter-spacing: .07em; color: var(--text-faint); text-transform: uppercase;
}
.nav-btn {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 10px; border: none; background: transparent; border-radius: 8px;
  color: var(--text); font-size: 13.5px; font-weight: 500; text-align: left;
  cursor: pointer; text-decoration: none;
}
.nav-btn:hover { background: #f4f4f5; color: var(--text); }
.nav-btn.active { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.nav-btn .nav-icon { display: flex; flex-shrink: 0; width: 18px; }
.nav-btn .nav-caret { margin-left: auto; transition: transform .15s ease; }
.nav-btn.expanded .nav-caret { transform: rotate(90deg); }
.nav-group { padding-left: 28px; }
.nav-group .nav-btn { font-size: 13px; padding: 7px 10px; }
.nav-leaf { padding-left: 44px; }
.nav-leaf .nav-btn { font-size: 12.5px; padding: 6px 10px; color: var(--text-muted); }
.nav-leaf .nav-btn.active { color: var(--brand); background: var(--brand-soft); }
.sidebar-footer {
  flex-shrink: 0; height: 56px; display: flex; align-items: center;
  border-top: 1px solid var(--border); padding: 0 12px;
}
.user-avatar {
  width: 32px; height: 32px; border-radius: 8px; background: var(--border);
  color: #3f3f46; display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.user-text strong { font-size: 13px; display: block; }
.user-text span { font-size: 11px; color: var(--text-faint); }

/* ---------- Main column ---------- */
.main-col { flex: 1; display: flex; flex-direction: column; min-width: 0; overflow: hidden; }
.topbar {
  height: 56px; flex-shrink: 0; display: flex; align-items: center; gap: 14px;
  padding: 0 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.topbar .crumb { font-size: 13.5px; color: var(--text-faint); }
.topbar .crumb .current { color: var(--text); font-weight: 600; }
.icon-btn {
  display: flex; align-items: center; justify-content: center; width: 34px; height: 34px;
  border-radius: 8px; border: 1px solid transparent; background: transparent;
  color: #52525b; cursor: pointer;
}
.icon-btn:hover { background: #f4f4f5; }
.content-area { flex: 1; overflow-y: auto; background: var(--bg); }
.content-inner { padding: 24px; max-width: 1460px; margin: 0 auto; }
.page-title { font-size: 22px; font-weight: 700; letter-spacing: -.02em; margin: 0; }
.page-subtitle { font-size: 13.5px; color: var(--text-muted); margin: 4px 0 0; }

/* ---------- Cards ---------- */
.card-flat {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px;
}
.kpi-icon {
  width: 40px; height: 40px; border-radius: 10px; background: var(--brand-soft);
  color: var(--brand); display: flex; align-items: center; justify-content: center;
}
.kpi-value { font-size: 24px; font-weight: 700; margin: 10px 0 2px; }
.kpi-label { font-size: 12.5px; color: var(--text-muted); }

/* ---------- Buttons ---------- */
.btn-brand {
  background: var(--brand); border-color: var(--brand); color: #fff;
  box-shadow: 0 1px 2px rgba(37,99,235,.3);
}
.btn-brand:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn-outline-flat { background: #fff; border: 1px solid var(--border); color: #3f3f46; }
.btn-outline-flat:hover { background: #f4f4f5; }

/* ---------- NEW: সব বাটনের border blue ---------- */
.btn { border-color: var(--brand) !important; }
.btn:hover, .btn:focus { border-color: var(--brand-dark) !important; }

/* ---------- Forms ---------- */
.form-label { font-size: 13px; font-weight: 600; color: #3f3f46; }
.form-control, .form-select { font-size: 13.5px; }

/* ---------- NEW: সব textbox ও dropdown-এর border blue ---------- */
.form-control, .form-select {
  border: 1px solid var(--brand) !important;
}
.form-control:focus, .form-select:focus {
  border-color: var(--brand-dark) !important;
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.form-control[readonly], .form-control:disabled {
  border: 1px solid var(--brand) !important;
  opacity: 1;
}

.section-title {
  font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  color: var(--text-muted); margin: 22px 0 10px; padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.section-title:first-child { margin-top: 0; }
.upload-box {
  background: #52525b; color: #fff; border-radius: 8px; text-align: center;
  padding: 14px 8px; font-size: 11.5px;
}
.upload-box img { max-width: 100%; max-height: 70px; margin-bottom: 6px; }

/* ---------- Table ---------- */
.table-flat thead th {
  font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--text-faint); border-bottom: 1px solid var(--border); font-weight: 600;
}
.table-flat td { font-size: 13.5px; vertical-align: middle; }
.badge-running { background: #dcfce7; color: #16a34a; }
.badge-closed { background: #fee2e2; color: #dc2626; }