.secure-shell {
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 10%, rgba(24, 117, 111, 0.14), transparent 34%),
    linear-gradient(135deg, #f6f8f5 0%, #eef3ef 48%, #f8f1ea 100%);
}

.secure-main {
  display: grid;
  gap: 18px;
  padding: 22px;
}

.panel-layout {
  grid-template-columns: 270px minmax(0, 1fr);
}

.panel-sidebar {
  background: rgba(251, 252, 250, 0.9);
  backdrop-filter: blur(16px);
}

.panel-sidebar .nav button span {
  display: grid;
  gap: 2px;
}

.panel-sidebar .nav button small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.panel-sidebar .nav button.active small {
  color: rgba(255, 255, 255, 0.68);
}

.panel-desktop-main {
  width: min(100%, 1480px);
  margin: 0 auto;
}

.panel-card {
  padding: 18px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.panel-card h2,
.panel-card h3 {
  margin: 0;
}

.panel-card p {
  margin: 6px 0 0;
  color: var(--muted);
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 14px;
}

.panel-span-3 {
  grid-column: span 3;
}

.panel-span-4 {
  grid-column: span 4;
}

.panel-span-5 {
  grid-column: span 5;
}

.panel-span-6 {
  grid-column: span 6;
}

.panel-span-7 {
  grid-column: span 7;
}

.panel-span-8 {
  grid-column: span 8;
}

.panel-span-12 {
  grid-column: span 12;
}

.panel-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 22px 0;
}

.panel-tabs button {
  min-height: 38px;
  padding: 8px 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.panel-tabs button.active {
  color: #fff;
  background: var(--teal);
  border-color: var(--teal);
}

.panel-hero {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 22px;
  background:
    linear-gradient(135deg, rgba(23, 34, 42, 0.94), rgba(24, 117, 111, 0.86)),
    radial-gradient(circle at 82% 18%, rgba(217, 154, 40, 0.34), transparent 32%);
  color: #fff;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.panel-hero.compact {
  padding: 18px 20px;
}

.panel-hero h2 {
  margin: 0;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.12;
}

.panel-hero p {
  max-width: 760px;
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.panel-kicker {
  margin: 0 0 5px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-hero .btn.ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.28);
}

.panel-metrics {
  grid-template-columns: repeat(4, minmax(160px, 1fr));
}

.panel-table {
  width: 100%;
  border-collapse: collapse;
}

.panel-table th,
.panel-table td {
  padding: 11px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.panel-table th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.panel-table td strong {
  display: block;
}

.leads-table {
  min-width: 1050px;
}

.flows-table,
.lessons-table,
.groups-table {
  min-width: 1080px;
}

.lead-notes {
  max-width: 360px;
}

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.panel-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.panel-form .wide {
  grid-column: 1 / -1;
}

.panel-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.panel-muted {
  color: var(--muted);
  font-size: 13px;
}

.panel-error {
  padding: 10px 12px;
  color: var(--danger);
  background: var(--coral-soft);
  border: 1px solid rgba(178, 59, 50, 0.24);
  border-radius: 10px;
}

.panel-success {
  padding: 10px 12px;
  color: var(--ok);
  background: var(--teal-soft);
  border: 1px solid rgba(40, 125, 75, 0.2);
  border-radius: 10px;
}

.lesson-students {
  display: grid;
  gap: 8px;
}

.lesson-student {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) 170px minmax(160px, 1fr);
  gap: 8px;
  align-items: center;
  padding: 10px;
  background: var(--surface-soft);
  border-radius: 10px;
}

.panel-filterbar {
  display: grid;
  grid-template-columns: repeat(5, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 14px;
  padding: 12px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.panel-filterbar label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.panel-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(23, 34, 42, 0.48);
  backdrop-filter: blur(10px);
}

.panel-modal {
  width: min(760px, 100%);
  max-height: min(86vh, 820px);
  padding: 20px;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 28px 80px rgba(23, 34, 42, 0.22);
}

.panel-login {
  border-radius: 18px;
}

@media (max-width: 920px) {
  .layout {
    display: block;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .panel-span-3,
  .panel-span-4,
  .panel-span-5,
  .panel-span-6,
  .panel-span-7,
  .panel-span-8 {
    grid-column: span 12;
  }

  .panel-form,
  .lesson-student,
  .panel-filterbar {
    grid-template-columns: 1fr;
  }

  .panel-hero {
    align-items: stretch;
    flex-direction: column;
  }

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