/*
 * Imperial Ink — App Shell Layout
 * Horizontal top navigation bar + main content area.
 */

.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-sidebar {
  width: 100%;
  flex-shrink: 0;
  padding: var(--space-sm) var(--space-md);
  background: var(--panel-translucent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-xs);
  position: sticky;
  top: 0;
  z-index: 10;
  overflow-x: auto;
}

.app-sidebar .sidebar-brand {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-right: var(--space-md);
  white-space: nowrap;
}

.app-sidebar .nav-sep {
  width: 1px;
  height: 20px;
  background: var(--line);
  flex-shrink: 0;
  margin: 0 var(--space-xs);
}

.app-sidebar .nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  font-size: 12px;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.app-sidebar .nav-link:hover {
  background: var(--primary-soft);
  color: var(--ink);
}

.app-sidebar .nav-link.active {
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 600;
}

.app-main {
  flex: 1;
  min-width: 0;
  overflow-x: hidden;
}

.app-sidebar .nav-links {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-xs);
}

@media (max-width: 768px) {
  .app-sidebar {
    padding: var(--space-xs) var(--space-sm);
    flex-wrap: wrap;
  }

  .app-sidebar .sidebar-brand {
    font-size: 15px;
    margin-right: auto;
  }

  .app-sidebar .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 20px;
    color: var(--ink);
    padding: 0;
  }

  .app-sidebar .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 2px;
    padding-top: var(--space-xs);
    border-top: 1px solid var(--line);
  }

  .app-sidebar .nav-links.open {
    display: flex;
  }

  .app-sidebar .nav-sep {
    display: none;
  }

  .app-sidebar .nav-link {
    padding: 10px 12px;
    font-size: 13px;
  }
}

@media (min-width: 769px) {
  .app-sidebar .nav-toggle {
    display: none;
  }
}

/* ── App Footer ── */

.app-footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.app-footer-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.app-footer .beta-notice {
  font-style: italic;
}

.app-footer .footer-feedback-btn {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.app-footer .footer-feedback-btn:hover {
  background: var(--primary-soft);
  color: var(--ink);
}

@media (max-width: 600px) {
  .app-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 12px;
  }
}

/* ── Feedback Modal ── */

.feedback-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(26, 21, 16, 0.48);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 40;
}

.feedback-modal-backdrop[hidden] {
  display: none;
}

.feedback-modal {
  width: min(100%, 520px);
  background: #fffdf9;
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 22px;
  display: grid;
  gap: 18px;
}

.feedback-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.feedback-modal-header h3 {
  margin: 0;
  font-size: 16px;
}

.feedback-form {
  display: grid;
  gap: 14px;
}

.feedback-form label {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

.feedback-form textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  padding: 12px 14px;
  font: inherit;
  color: var(--ink);
  background: white;
  resize: vertical;
  min-height: 140px;
}

.feedback-form-actions {
  display: flex;
  justify-content: flex-end;
}

.feedback-modal-status {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}