/* ============================================================
   frame-shell.css — YoruVerse "Frame Shell" chrome
   (header rail, mobile drawer, footer)

   Implements header-mobilemenu-footer-layout-suggestion.md.

   One rail width (--ss-max = 1120px), one token family (--ss-*),
   one search entry point, zero inline styles, zero --accent-primary.

   Loaded AFTER main.css by js/shared-header.js so it lands on every
   page at once. The --ss-* tokens mirror css/series-shell.css so the
   chrome works on pages that don't load the Series Shell.
   ============================================================ */

:root {
  --ss-4: 4px;  --ss-8: 8px;   --ss-12: 12px;
  --ss-16: 16px; --ss-24: 24px; --ss-32: 32px; --ss-48: 48px;

  --ss-max: 1120px;
  --ss-radius: 8px;
  --ss-radius-chip: 6px;

  --ss-bg: #ffffff;
  --ss-surface: #f9fafb;
  --ss-surface-2: #f3f4f6;
  --ss-border: #e5e7eb;
  --ss-border-strong: #d1d5db;
  --ss-text: #111827;
  --ss-text-muted: #6b7280;

  --ss-primary-bg: #1f2937;
  --ss-primary-bg-hover: #111827;
  --ss-primary-fg: #ffffff;
  --ss-secondary-bg: #f3f4f6;
  --ss-secondary-bg-hover: #e5e7eb;
  --ss-secondary-fg: #111827;
  --ss-secondary-border: #d1d5db;
  --ss-ghost-fg: #4b5563;
  --ss-ghost-bg-hover: #f3f4f6;

  --ss-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
  --ss-transition: 120ms ease;

  /* Frame-only tokens */
  --fr-h: 65px;
  --fr-danger: #dc2626;
}

[data-theme="dark"] {
  --ss-bg: #0f1115;
  --ss-surface: #14171d;
  --ss-surface-2: #1f2937;
  --ss-border: #262b33;
  --ss-border-strong: #374151;
  --ss-text: #f9fafb;
  --ss-text-muted: #9ca3af;

  --ss-primary-bg: #e5e7eb;
  --ss-primary-bg-hover: #f9fafb;
  --ss-primary-fg: #111827;
  --ss-secondary-bg: #1f2937;
  --ss-secondary-bg-hover: #273244;
  --ss-secondary-fg: #f9fafb;
  --ss-secondary-border: #374151;
  --ss-ghost-fg: #9ca3af;
  --ss-ghost-bg-hover: #1f2937;

  --ss-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
  --fr-danger: #f87171;
}

/* ============ Header rail ============ */

header.yv-frame,
.yv-frame {
  position: sticky;
  top: 0;
  z-index: 900;
  height: var(--fr-h);
  background: var(--ss-bg);
  border-bottom: 1px solid var(--ss-border);
  box-shadow: none;
  transition: box-shadow var(--ss-transition);
}

.yv-frame.is-scrolled { box-shadow: var(--ss-shadow); }

.fr-rail {
  max-width: var(--ss-max);
  margin: 0 auto;
  padding: 0 var(--ss-16);
  height: var(--fr-h);
  display: flex;
  align-items: center;
  gap: var(--ss-16);
}

/* Brand */
.fr-brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--ss-text);
  border-radius: var(--ss-radius-chip);
}

.fr-brand-img {
  height: 50px;
  width: auto;
  display: block;
}

/* Tabs */
.fr-tabs {
  display: none;
  align-items: center;
  gap: var(--ss-4);
  flex: 1 1 auto;
  min-width: 0;
  height: var(--fr-h);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.fr-tabs::-webkit-scrollbar { display: none; }

@media (min-width: 768px) {
  .fr-tabs { display: flex; }
}

.fr-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: var(--fr-h);
  padding: 0 var(--ss-12);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  color: var(--ss-text-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--ss-transition), border-color var(--ss-transition);
}

.fr-tab:hover { color: var(--ss-text); }

.fr-tab.is-active {
  color: var(--ss-text);
  border-bottom-color: var(--ss-text);
}

/* Actions */
.fr-actions {
  display: flex;
  align-items: center;
  gap: var(--ss-8);
  margin-left: auto;
  flex: 0 0 auto;
}

.fr-action {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ss-text-muted);
  font-size: 15px;
  border-radius: var(--ss-radius);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--ss-transition), color var(--ss-transition);
}

.fr-action:hover {
  background: var(--ss-ghost-bg-hover);
  color: var(--ss-text);
}

.fr-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--ss-border-strong);
  display: block;
}

.fr-login {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 var(--ss-12);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--ss-radius);
  background: var(--ss-primary-bg);
  color: var(--ss-primary-fg);
  text-decoration: none;
  transition: background var(--ss-transition);
}

.fr-login:hover { background: var(--ss-primary-bg-hover); }

/* Menu button is available on EVERY breakpoint: the drawer holds the
   long-tail navigation (Global Search, Leaderboard, Suggestions, Admin…)
   that intentionally stays out of the compact header rail. */
.fr-menu-btn { display: inline-flex; }
.fr-menu-btn .fr-menu-btn-label { display: none; }

@media (min-width: 768px) {
  .fr-menu-btn {
    width: auto;
    padding: 0 var(--ss-12);
    gap: var(--ss-8);
    height: 32px;
    border: 1px solid var(--ss-secondary-border);
    background: var(--ss-secondary-bg);
    color: var(--ss-secondary-fg);
    border-radius: var(--ss-radius-chip);
    font-size: 13px;
    font-weight: 600;
  }

  .fr-menu-btn:hover { background: var(--ss-secondary-bg-hover); }
  .fr-menu-btn .fr-menu-btn-label { display: inline; }
}

/* Notification badge on the bell */
.yv-frame .notification-badge,
.fr-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: #ef4444;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 16px;
  text-align: center;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--ss-bg);
}

/* Inline search (>=1024px only) — a single entry point into the
   HeaderSearch modal; there is no second mobile bar. */
.fr-search {
  display: none;
  align-items: center;
  gap: var(--ss-8);
  width: 100%;
  max-width: 360px;
  height: 34px;
  padding: 0 var(--ss-12);
  background: var(--ss-surface-2);
  border: 1px solid var(--ss-border);
  border-radius: var(--ss-radius);
  color: var(--ss-text-muted);
  cursor: text;
}

@media (min-width: 1024px) {
  .fr-search { display: flex; }
  .fr-actions .fr-action#searchToggle { display: none; }
}

.fr-search i { font-size: 12px; }

.fr-search input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--ss-text);
  font: inherit;
  font-size: 13px;
  cursor: text;
}

.fr-search input::placeholder { color: var(--ss-text-muted); }

/* Focus rings that match the Shell */
.fr-tab:focus-visible,
.fr-action:focus-visible,
.fr-brand:focus-visible,
.fr-login:focus-visible,
.fr-row:focus-visible,
.fr-search input:focus-visible {
  outline: 2px solid var(--ss-border-strong);
  outline-offset: 2px;
}

/* ============ Mobile drawer ============ */

.fr-drawer-root {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--ss-transition), visibility var(--ss-transition);
}

.fr-drawer-root.active {
  opacity: 1;
  visibility: visible;
}

.fr-drawer {
  position: absolute;
  isolation: isolate;
  top: 0;
  right: 0;
  bottom: 0;
  width: 260px !important;
  max-width: 70vw !important;
  display: flex;
  flex-direction: column;
  background: var(--ss-bg);
  border-left: 1px solid var(--ss-border);
  transform: translateX(100%);
  transition: transform 180ms cubic-bezier(.2, .8, .2, 1);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.fr-drawer-root.active .fr-drawer { transform: translateX(0); }

/* The drawer is a desktop citizen too — a little roomier on wide screens. */
@media (min-width: 768px) {
  .fr-drawer {
    width: 320px !important;
    max-width: 90vw !important;
  }
}

/* Identity strip */
.fr-drawer-id {
  display: flex;
  padding-right: 52px;
  align-items: center;
  gap: var(--ss-12);
  padding: var(--ss-16);
  border-bottom: 1px solid var(--ss-border);
  text-decoration: none;
  color: var(--ss-text);
}

.fr-drawer-id-avatar {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--ss-border-strong);
}

.fr-drawer-id-text { min-width: 0; flex: 1 1 auto; display: flex; flex-direction: column; gap: 2px; }

.fr-drawer-id-name {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--ss-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fr-drawer-id-meta {
  display: block;
  font-size: 12px;
  color: var(--ss-text-muted);
}

.fr-drawer-close {
  position: absolute;
  top: 10px;
  right: 12px;
  z-index: 1;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: var(--ss-text-muted);
  border-radius: var(--ss-radius);
  cursor: pointer;
  transition: background var(--ss-transition), color var(--ss-transition);
}

.fr-drawer-close:hover { background: var(--ss-ghost-bg-hover); color: var(--ss-text); }

/* Sections */
.fr-sec {
  padding: var(--ss-8) 0;
  border-bottom: 1px solid var(--ss-border);
}

.fr-sec:last-child { border-bottom: 0; }

.fr-sec-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ss-text-muted);
  padding: var(--ss-8) var(--ss-16) var(--ss-4);
}

.fr-row {
  display: flex;
  align-items: center;
  gap: var(--ss-12);
  min-height: 44px;
  padding: 0 var(--ss-16);
  width: 100%;
  font-size: 15px;
  font-weight: 500;
  color: var(--ss-text);
  text-decoration: none;
  background: transparent;
  border: 0;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--ss-transition);
}

.fr-row:hover { background: var(--ss-ghost-bg-hover); }

.fr-row.is-active {
  color: var(--ss-text);
  box-shadow: inset 2px 0 0 var(--ss-text);
}

.fr-row i { width: 16px; text-align: center; color: var(--ss-text-muted); font-size: 14px; }

.fr-row-danger { color: var(--fr-danger); }
.fr-row-danger i { color: var(--fr-danger); }

.yv-frame-drawer .mobile-notif-badge,
.fr-row .mobile-notif-badge {
  margin-left: auto;
  background: #ef4444;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 1px 8px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
}

/* Collapsed "More" */
.fr-more > summary {
  display: flex;
  align-items: center;
  gap: var(--ss-8);
  min-height: 44px;
  padding: 0 var(--ss-16);
  cursor: pointer;
  list-style: none;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ss-text-muted);
}

.fr-more > summary::-webkit-details-marker { display: none; }
.fr-more > summary i { transition: transform var(--ss-transition); font-size: 11px; }
.fr-more[open] > summary i { transform: rotate(90deg); }

/* Drawer footer */
.fr-drawer-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ss-8);
  padding: var(--ss-12) var(--ss-16);
  border-top: 1px solid var(--ss-border);
}

.fr-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--ss-8);
  height: 32px;
  padding: 0 var(--ss-12);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  color: var(--ss-secondary-fg);
  background: var(--ss-secondary-bg);
  border: 1px solid var(--ss-secondary-border);
  border-radius: var(--ss-radius-chip);
  cursor: pointer;
  transition: background var(--ss-transition);
}

.fr-chip:hover { background: var(--ss-secondary-bg-hover); }

.fr-signout {
  background: transparent;
  border: 0;
  padding: 0 var(--ss-4);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--fr-danger);
  text-decoration: none;
  cursor: pointer;
}

.fr-drawer-id .fr-signin { margin-top: var(--ss-4); align-self: flex-start; }

.fr-signin {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 var(--ss-12);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--ss-radius);
  background: var(--ss-primary-bg);
  color: var(--ss-primary-fg);
  text-decoration: none;
}

/* ============ Footer ============ */

.fr-foot {
  background: var(--ss-surface);
  border-top: 1px solid var(--ss-border);
  margin-top: var(--ss-48);
  padding: var(--ss-24) 0;
}

.fr-foot .fr-rail {
  height: auto;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--ss-16);
  width: 100%;
  max-width: var(--ss-max);
  margin-inline: auto;
  padding: 0 var(--ss-16);
}

.fr-foot-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--ss-12);
  width: 100%;
}

.fr-foot-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  flex: 0 0 auto;
}

.fr-foot-brand img { height: 45px; width: auto; display: block; }

.fr-foot-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--ss-24);
}

.fr-foot-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--ss-text-muted);
  text-decoration: none;
  background: none;
  border: 0;
  padding: 0;
  font-family: inherit;
  cursor: pointer;
  transition: color var(--ss-transition);
}

.fr-foot-link:hover { color: var(--ss-text); }

.fr-foot-nav { justify-content: center; }

.fr-foot-note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--ss-text-muted);
  margin: 0;
  max-width: 720px;
}

/* Desktop: balanced two-column top row, centered legal note. */
@media (min-width: 768px) {
  .fr-foot { padding: var(--ss-32) 0; }

  .fr-foot .fr-rail {
    align-items: stretch;
    text-align: left;
    gap: var(--ss-24);
    padding: 0 var(--ss-24);
  }

  .fr-foot-top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--ss-24);
  }

  .fr-foot-nav { justify-content: flex-end; }

  .fr-foot-note {
    max-width: 100%;
    padding-top: var(--ss-16);
    border-top: 1px solid var(--ss-border);
  }
}

@media (prefers-reduced-motion: reduce) {
  .yv-frame,
  .fr-tab,
  .fr-action,
  .fr-row,
  .fr-drawer,
  .fr-drawer-root { transition: none !important; }
}