/* LAYOUT */

.app {
  display: grid;
  grid-template-columns: minmax(200px, 240px) minmax(0, 1fr);
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "header header"
    "sidebar content";
  gap: 0 24px;
  min-height: 100vh;
}

.app-header {
  grid-area: header;
}

.content {
  grid-area: content;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* HEADER */

.header {
  padding: 28px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  text-align: left;
  gap: 2px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.header h1 {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.header p {
  margin-top: 4px;
  font-size: 0.85rem;
  color: var(--muted);
}

/* SIDEBAR */

.sidebar {
  grid-area: sidebar;
  background: var(--panel);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-nav-secondary {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.sidebar-link {
  display: block;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  text-decoration: none;
  transition: transform 150ms ease, border-color 150ms ease,
    background 150ms ease;
}

.sidebar-link.active,
.sidebar-link[aria-current="page"] {
  background: rgba(79, 209, 197, 0.18);
  border-color: rgba(79, 209, 197, 0.5);
  color: var(--text);
}

.sidebar-link.is-disabled,
.sidebar-link[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.sidebar-link:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.sidebar-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sidebar-hint {
  margin-left: 6px;
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 500;
}


/* footer */
footer {
  grid-area: footer;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.55rem;
  color: var(--muted);
}

/* RESPONSIVE */

@media (max-width: 1200px) {
  .app {
    grid-template-columns: minmax(200px, 220px) minmax(0, 1fr);
    gap: 0 16px;
  }

  .header {
    padding: 24px 20px 14px;
  }

  .sidebar {
    padding: 20px;
  }
}

@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "sidebar"
      "content";
    gap: 0;
  }

  .sidebar {
    min-height: auto;
    border-radius: 0;
    padding: 16px;
  }

  .header {
    padding: 20px 16px 12px;
  }

  .sidebar-link {
    padding: 8px 10px;
  }
}