/* static/css/shell.css
   PHASE 2 STEP 1 — FOUNDATION — Public shell + App shell.

   Requires tokens.css. Backs templates/partials/nav_public.html,
   templates/partials/nav_app.html, templates/base_public.html and
   templates/base_app.html. See PHASE_2_FRONTEND_ARCHITECTURE.md
   "Step 5 — Two shared shells" and PHASE_2_PRODUCT_NAVIGATION.md.
*/

body.ds-shell-body {
  margin: 0;
  font-family: var(--font-family-base);
  background-color: var(--bg-main);
  background-image: var(--page-ambient-glow);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
}

@media (prefers-reduced-motion: no-preference) {
  .ds-card,
  .plan-card {
    transition: box-shadow 0.18s ease, border-color 0.18s ease, transform 0.12s ease;
  }
}

/* ============================== Top nav ================================ */

.ds-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 14px var(--space-6);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.ds-nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--text-primary);
  text-decoration: none;
}

.ds-nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

.ds-nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}

.ds-nav-links a:hover { color: var(--text-primary); }
.ds-nav-links a[aria-current="page"] { color: var(--primary-color); border-bottom-color: var(--primary-color); }

.ds-nav-actions { display: flex; align-items: center; gap: var(--space-3); }

/* PHASE 8 ARCHITECTURE RECOVERY -- Priority 1: logout is now a POST
   form (see templates/partials/nav_app.html + accounts/views.py
   user_logout), not a bare <a href>, so an ordinary link click/prefetch/
   stray-href can never trigger it. The wrapping <form> is block-level by
   default, which would break the .ds-nav-actions flex row and the
   mobile panel's link list -- these two rules just make the form behave
   like the <a> it replaced, with no visual change. */
.ds-nav-logout-form { display: inline-flex; margin: 0; }

/* Generators dropdown -- makes the 5 generators discoverable from every
   page, not only from main.html's in-page tab strip (GAP-05). */
.ds-nav-dropdown { position: relative; }
.ds-nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--space-2);
  z-index: var(--z-nav);
}
.ds-nav-dropdown:hover .ds-nav-dropdown-menu,
.ds-nav-dropdown:focus-within .ds-nav-dropdown-menu { display: block; }
.ds-nav-dropdown-menu a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-weight: 500;
}
.ds-nav-dropdown-menu a:hover { background: var(--bg-hover); }

.ds-nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-primary);
}

/* ============================== Mobile nav ============================== */

.ds-nav-mobile-panel { display: none; }

@media (max-width: 768px) {
  .ds-nav-links { display: none; }
  .ds-nav-toggle { display: block; }

  .ds-nav-mobile-panel {
    position: fixed;
    inset: 0;
    top: 57px;
    background: var(--bg-card);
    z-index: calc(var(--z-nav) - 1);
    padding: var(--space-4);
  }
  .ds-nav-mobile-panel.is-open { display: block; }
  .ds-nav-mobile-panel a,
  .ds-nav-mobile-panel .ds-nav-logout-form button {
    display: block;
    width: 100%;
    padding: 14px var(--space-2);
    font-size: var(--text-md);
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    background: none;
    border-left: none;
    border-right: none;
    border-top: none;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
  }
  .ds-nav-mobile-panel .ds-nav-logout-form { display: block; }
}

/* ============================== Shell body =============================== */

.ds-shell-main {
  max-width: var(--app-max-width);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) var(--space-10);
}

/* Public shell centers a single card (auth flows) instead of a wide
   product layout. */
.ds-public-main {
  min-height: calc(100vh - 65px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}