.app-shell {
  min-height: 100vh;
}

.auth-layout {
  display: grid;
  min-height: 100vh;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 520px);
}

.auth-intro {
  padding: 56px clamp(24px, 6vw, 96px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
}

.auth-panel {
  background: var(--panel);
  padding: 36px;
  display: flex;
  align-items: center;
  box-shadow: -10px 0 36px rgba(23, 32, 51, 0.08);
}

.app-layout {
  display: grid;
  grid-template-columns: 268px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  background: #ffffff;
  border-right: 1px solid var(--line);
  padding: 22px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  background: #dbeafe;
  color: var(--primary);
  font-weight: 800;
}

.brand-text {
  font-size: 1.05rem;
  font-weight: 800;
}

.main-panel {
  min-width: 0;
  padding: 24px clamp(16px, 3vw, 36px) 56px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.page-header {
  margin: 10px 0 22px;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
}

.page-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}

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

@media (max-width: 960px) {
  .auth-layout,
  .app-layout {
    grid-template-columns: 1fr;
  }

  .auth-panel {
    box-shadow: none;
  }

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

  .nav-list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (max-width: 640px) {
  .auth-intro,
  .auth-panel,
  .main-panel {
    padding: 20px;
  }

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

  .nav-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}