/* ── Navigation ─────────────────────────────────────────────────────────────── */

/* ═══════════════════════════════════════════════════════════════════════════
   DESKTOP SIDEBAR  (≥ 701px) – fixed, below topbar, nav items only
   ═══════════════════════════════════════════════════════════════════════════ */

.sidebar { display: none; }
.sidebar-overlay { display: none; }

/* Large desktop (≥1101px): sidebar always visible */
@media (min-width: 1101px) {
  .sidebar {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--topbar-h);
    left: var(--page-side);
    bottom: 0;
    width: var(--sidebar-w);
    overflow-y: auto;
    background: transparent;
    padding: 12px 8px;
    z-index: 200;
    scrollbar-width: none;
    border-right: none;
  }
  .sidebar::-webkit-scrollbar { display: none; }
}

/* Small desktop (701-1100px): floating sidebar toggled via button */
@media (min-width: 701px) and (max-width: 1100px) {
  .sidebar {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    bottom: 0;
    width: var(--sidebar-w);
    overflow-y: auto;
    background: var(--panel);
    padding: 12px 8px;
    z-index: 450;
    scrollbar-width: none;
    border-right: 1px solid var(--line);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.18);
    transform: translateX(-100%);
    transition: transform 0.22s ease;
  }
  .sidebar::-webkit-scrollbar { display: none; }
  .sidebar.is-open {
    transform: translateX(0);
  }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 400;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
  }
  .sidebar-overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
  }
}

/* Sidebar nav items */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 6px;
  background: var(--panel);
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 10px 10px;
  /* ── Issue #3: same font as mobile nav ── */
  font-size: 0.9rem;
  font-weight: 500;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.005em;
  color: var(--muted);
  background: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  transition: color 0.15s, background 0.15s;
  transform: none;
  white-space: nowrap;
}
.sidebar-nav-item:hover { color: var(--text); background: var(--chip); transform: none; }
.sidebar-nav-item.is-active {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 9%, var(--panel));
  font-weight: 600;
}
.sidebar-nav-item.is-disabled { opacity: 0.35; pointer-events: none; cursor: default; }

.sidebar-nav-icon {
  display: inline-block;
  width: 18px;
  height: 18px;
  background: currentColor;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  flex-shrink: 0;
}


/* ═══════════════════════════════════════════════════════════════════════════
   SHARED: SVG icon masks (sidebar + mobile)
   ═══════════════════════════════════════════════════════════════════════════ */

.mobile-nav-btn-icon {
  display: inline-block;
  background: currentColor;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
}

[data-nav-page="library"] .sidebar-nav-icon,
[data-nav-page="library"] .mobile-nav-btn-icon {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 3L2 9h2v8H2v2h20v-2h-2V9h2L12 3zm-5 6h2v8H7V9zm4 0h2v8h-2V9zm4 0h2v8h-2V9z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 3L2 9h2v8H2v2h20v-2h-2V9h2L12 3zm-5 6h2v8H7V9zm4 0h2v8h-2V9zm4 0h2v8h-2V9z'/%3E%3C/svg%3E");
}
[data-nav-page="feed"] .sidebar-nav-icon,
[data-nav-page="feed"] .mobile-nav-btn-icon {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M2 4h20v3H2zm0 6h20v3H2zm0 6h20v3H2z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M2 4h20v3H2zm0 6h20v3H2zm0 6h20v3H2z'/%3E%3C/svg%3E");
}
[data-nav-page="profile"] .sidebar-nav-icon,
[data-nav-page="profile"] .mobile-nav-btn-icon {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='8' r='4'/%3E%3Cpath d='M4 20c0-4 3.6-7 8-7s8 3 8 7'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='8' r='4'/%3E%3Cpath d='M4 20c0-4 3.6-7 8-7s8 3 8 7'/%3E%3C/svg%3E");
}
[data-nav-page="bin"] .sidebar-nav-icon,
[data-nav-page="bin"] .mobile-nav-btn-icon {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9 3h6l1 2H8zm-5 3h16l-1.5 15H5.5zm4 3v9h1.5V9zm3.25 0v9h1.5V9zm3.25 0v9H16V9z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9 3h6l1 2H8zm-5 3h16l-1.5 15H5.5zm4 3v9h1.5V9zm3.25 0v9h1.5V9zm3.25 0v9H16V9z'/%3E%3C/svg%3E");
}
[data-nav-page="maps"] .sidebar-nav-icon,
[data-nav-page="maps"] .mobile-nav-btn-icon {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='12' r='3'/%3E%3Cpath d='M12 2a10 10 0 1 0 0 20A10 10 0 0 0 12 2zm0 2a8 8 0 0 1 8 8 8 8 0 0 1-8 8 8 8 0 0 1-8-8 8 8 0 0 1 8-8z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='12' r='3'/%3E%3Cpath d='M12 2a10 10 0 1 0 0 20A10 10 0 0 0 12 2zm0 2a8 8 0 0 1 8 8 8 8 0 0 1-8 8 8 8 0 0 1-8-8 8 8 0 0 1 8-8z'/%3E%3C/svg%3E");
}


/* ═══════════════════════════════════════════════════════════════════════════
   MOBILE bottom nav bar  (≤ 700px)
   ═══════════════════════════════════════════════════════════════════════════ */

.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--panel);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 200;
  transition: transform 0.22s ease;
  will-change: transform;
}
.mobile-nav.is-hidden { transform: translateY(100%); }

.mobile-nav-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 62px 1fr 1fr;
  align-items: center;
  width: 100%;
  height: 100%;
  padding: 0;
}

.mobile-nav-btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 100%;
  min-width: 0;
  padding: 0;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.60rem;
  font-weight: 500;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: color 0.15s;
  transform: none;
  -webkit-tap-highlight-color: transparent;
}
.mobile-nav-btn:hover,
.mobile-nav-btn:active { transform: none; color: var(--text); }
.mobile-nav-btn.is-active { color: var(--accent); font-weight: 600; }
.mobile-nav-btn.is-active::after {
  content: "";
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  border-radius: 1px;
  background: var(--accent);
}
.mobile-nav-btn.is-disabled { opacity: 0.35; pointer-events: none; }

/* Centre + button */
.mobile-nav-plus-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  justify-self: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  font-family: inherit;
  border: none;
  box-shadow: 0 3px 12px rgba(0,0,0,0.2);
  cursor: pointer;
  transform: none;
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}
.mobile-nav-plus-btn:hover,
.mobile-nav-plus-btn:active { transform: none; background: var(--accent-dark); }


/* ── Quick-add panel ──────────────────────────────────────────────────────── */
/* translateY(100%) alone doesn't fully hide the panel at bottom: 60px.
   Adding the nav bar height (60px) ensures it's fully off-screen. */
.mobile-quick-add-panel {
  position: fixed;
  bottom: 60px;
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 1px solid var(--line);
  padding: 10px 12px;
  z-index: 199;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.10);
  transform: translateY(calc(100% + 60px));
  transition: transform 0.22s ease;
}
.mobile-quick-add-panel.is-open { transform: translateY(0); }

.mobile-quick-add-row { display: flex; gap: 6px; align-items: center; }
.mobile-quick-add-input-wrap { position: relative; flex: 1; min-width: 0; display: flex; }
.mobile-quick-add-input-wrap .mobile-quick-add-input { flex: 1; }
.mobile-quick-add-input {
  flex: 1;
  height: 36px;
  padding: 0 28px 0 14px;
  border: 1px solid var(--line);
  border-radius: 20px;
  font-size: 0.87rem;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--panel);
  color: var(--text);
  min-width: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  transition: outline 0.12s, box-shadow 0.12s;
}
.mobile-quick-add-input:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
  box-shadow: 0 2px 12px rgba(0,0,0,0.20);
}
.mobile-quick-add-input::placeholder { color: var(--muted); opacity: 0.7; }
.mobile-quick-add-fetch {
  height: 36px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  color: var(--text);
  font-size: 0.84rem;
  font-weight: 500;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  transform: none;
}
.mobile-quick-add-fetch:hover { background: var(--chip); transform: none; }
.mobile-quick-add-submit {
  height: 36px;
  padding: 0 13px;
  border: none;
  border-radius: 18px;
  background: var(--accent);
  color: #fff;
  font-size: 0.84rem;
  font-weight: 600;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
  transform: none;
  letter-spacing: 0.01em;
}
.mobile-quick-add-submit:hover { transform: none; background: var(--accent-dark); }

/* ── Mobile button shimmer loading ─────────────────────────────────────────── */
@keyframes btn-shimmer {
  0%   { background-position: 200% center; }
  100% { background-position: -200% center; }
}
.mobile-quick-add-fetch.is-loading {
  pointer-events: none;
  color: var(--muted);
  background: linear-gradient(
    110deg, var(--panel) 35%,
    color-mix(in srgb, var(--accent) 22%, var(--panel)) 50%,
    var(--panel) 65%
  );
  background-size: 200% 100%;
  animation: btn-shimmer 1.6s ease-in-out infinite;
}
.mobile-quick-add-submit.is-loading {
  pointer-events: none;
  background: linear-gradient(
    110deg, var(--accent) 35%,
    color-mix(in srgb, #fff 28%, var(--accent)) 50%,
    var(--accent) 65%
  );
  background-size: 200% 100%;
  animation: btn-shimmer 1.6s ease-in-out infinite;
}

/* ── Mobile breakpoint toggle ─────────────────────────────────────────────── */
@media (max-width: 700px) {
  .mobile-nav { display: flex; }
  .app-shell { padding-bottom: 72px; }

  /* Slide-in sidebar drawer (toggled via brand mark) */
  .sidebar {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 240px;
    overflow-y: auto;
    background: var(--panel);
    padding: 16px 10px;
    z-index: 450;
    scrollbar-width: none;
    border-right: 1px solid var(--line);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.18);
    transform: translateX(-100%);
    transition: transform 0.22s ease;
  }
  .sidebar::-webkit-scrollbar { display: none; }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 400;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
  }
  .sidebar-overlay.is-visible { opacity: 1; pointer-events: auto; }
}

/* ── Shared X clear button for URL/DOI inputs ────────────────────────────── */
.input-clear-x {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  padding: 0;
  border: none;
  background: none;
  color: var(--muted);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.input-clear-x:hover { opacity: 0.9; color: var(--text); background: none; transform: translateY(-50%); }
.input-clear-x.is-hidden { display: none; }

/* ── Dark / mint tweaks ───────────────────────────────────────────────────── */
body.dark-mode .mobile-nav { box-shadow: none; }
body.dark-mode .mobile-nav-plus-btn { box-shadow: 0 3px 14px rgba(0,0,0,0.45); }
body.dark-mode .mobile-nav-plus-btn,
body.dark-mode .mobile-nav-plus-btn:hover { color: var(--bg); }
body.dark-mode .mobile-quick-add-panel { box-shadow: 0 -6px 28px rgba(0,0,0,0.4); }
body.dark-mode .mobile-quick-add-submit,
body.dark-mode .mobile-quick-add-submit:hover { color: var(--bg); }
body.dark-mode .sidebar-nav { box-shadow: 0 4px 20px rgba(0,0,0,0.45); }