/* ─────────────────────────── Design tokens ─────────────────────────── */
:root {
  --bg:          #0d1117;
  --surface:     #161b22;
  --surface2:    #1c2128;
  --border:      #30363d;
  --border-soft: #21262d;
  --text:        #e6edf3;
  --text-muted:  #8b949e;
  --accent:      #2f81f7;
  --accent-h:    #388bfd;
  --green:       #3fb950;
  --red:         #f85149;
  --yellow:      #d29922;
  --radius:      8px;
  --radius-lg:   12px;
  --sidebar-w:   220px;
  --topbar-h:    56px;
  --transition:  .15s ease;
}

/* ─────────────────────────── Reset ─────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
  display: flex;
  overflow: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-h); }
img { display: block; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

/* ── Modern form field style (dialogs, panels, modals) ── */
.modal input:not([type=checkbox]):not([type=radio]),
.modal select, .modal textarea,
.dlg input:not([type=checkbox]):not([type=radio]),
.dlg select, .dlg textarea,
#editPanel input:not([type=checkbox]):not([type=radio]),
#editPanel select {
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: .84rem;
  font-family: inherit;
  padding: 7px 11px;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease;
  box-sizing: border-box;
  width: 100%;
}
.modal input:not([type=checkbox]):not([type=radio]):focus,
.modal select:focus, .modal textarea:focus,
.dlg input:not([type=checkbox]):not([type=radio]):focus,
.dlg select:focus, .dlg textarea:focus,
#editPanel input:not([type=checkbox]):not([type=radio]):focus,
#editPanel select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .14);
}
.modal input::placeholder, .dlg input::placeholder { color: var(--text-muted); opacity: .65; }

/* ─────────────────────────── Sidebar ─────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  height: 100vh;
  height: 100dvh; /* dynamic viewport height — accounts for mobile browser chrome */
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition), min-width var(--transition);
  position: fixed;
  left: 0; top: 0; bottom: 0;
  z-index: 100;
}
/* Global sidebar collapse (all pages) */
body.sb-collapsed .sidebar { width: 0; min-width: 0; }
body.sb-collapsed .main    { margin-left: 0; }

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: 1.1rem 1.1rem .8rem;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.3px;
  border-bottom: 1px solid var(--border-soft);
}
.sidebar-logo svg { width: 30px; height: 30px; flex-shrink: 0; }
.sidebar-logo img {
  height: 32px; width: auto; flex-shrink: 0;
  /* white halo so the colorful logo stays readable on the dark sidebar */
  filter: drop-shadow(0 0 2px rgba(255,255,255,.45));
}
.sidebar-logo b { color: var(--accent); font-weight: 700; }

.sidebar-nav {
  flex: 1;
  padding: .6rem 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .6rem 1.1rem;
  color: var(--text-muted);
  font-weight: 500;
  border-radius: 0;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
  overflow: hidden;
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item:hover { color: var(--text); background: var(--surface2); }
.nav-item.active { color: var(--accent); background: rgba(47,129,247,.1); }
.nav-item.admin-only { display: none; }
body.is-admin .nav-item.admin-only { display: flex; }

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .9rem 1rem;
  padding-bottom: max(.9rem, env(safe-area-inset-bottom)); /* iOS home bar */
  border-top: 1px solid var(--border-soft);
  flex-shrink: 0; /* never shrink — always visible */
}
.user-info { display: flex; align-items: center; gap: .6rem; flex: 1; min-width: 0; }
.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.user-meta { min-width: 0; }
.user-name { font-weight: 600; font-size: .85rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: .75rem; color: var(--text-muted); text-transform: capitalize; }

.btn-logout {
  width: 30px; height: 30px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: color var(--transition), background var(--transition);
}
.btn-logout svg { width: 16px; height: 16px; }
.btn-logout:hover { color: var(--red); background: rgba(248,81,73,.1); }

/* ─────────────────────────── Main ─────────────────────────── */
.main {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  transition: margin-left var(--transition);
}

/* ─────────────────────────── Topbar ─────────────────────────── */
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.25rem;
  flex-shrink: 0;
}
.sidebar-toggle {
  background: none; border: none; color: var(--text-muted);
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.sidebar-toggle:hover { color: var(--text); background: var(--surface2); }
.sidebar-toggle svg { width: 20px; height: 20px; }
.page-title { font-size: 1rem; font-weight: 700; color: var(--text); flex: 1; }

.topbar-actions { display: flex; align-items: center; gap: .6rem; }

.search-wrap {
  position: relative;
  display: flex; align-items: center;
}
.search-wrap svg {
  position: absolute; left: .6rem;
  width: 15px; height: 15px;
  color: var(--text-muted);
  pointer-events: none;
}
.search-wrap input {
  padding: .4rem .7rem .4rem 2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: .85rem;
  outline: none;
  width: 200px;
  transition: border-color var(--transition), width var(--transition);
}
.search-wrap input:focus { border-color: var(--accent); width: 250px; }

.select-sm {
  padding: .38rem .6rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: .85rem;
  outline: none;
  cursor: pointer;
}

/* ─────────────────────────── Content ─────────────────────────── */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
}

/* ─────────────────────────── Camera grid ─────────────────────────── */
.cam-grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), 1fr);
  gap: 1rem;
}
.cam-grid[data-cols="1"] { --cols: 1; }
.cam-grid[data-cols="2"] { --cols: 2; }
.cam-grid[data-cols="3"] { --cols: 3; }
.cam-grid[data-cols="4"] { --cols: 4; }
.cam-grid[data-cols="5"] { --cols: 5; }
.cam-grid[data-cols="6"] { --cols: 6; }

.cam-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.cam-card:hover { border-color: var(--accent); transform: translateY(-1px); }

.cam-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  overflow: hidden;
}
.cam-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.cam-thumb.no-preview {
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: .8rem;
}
.cam-thumb.no-preview::after { content: "No preview"; }

.cam-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.cam-card:hover .cam-overlay { opacity: 1; }

.play-btn {
  width: 52px; height: 52px;
  background: rgba(47,129,247,.9);
  border: none; border-radius: 50%;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), transform var(--transition);
}
.play-btn svg { width: 28px; height: 28px; }
.play-btn:hover { background: var(--accent-h); transform: scale(1.05); }

.cam-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: .65rem .9rem;
}
.cam-name { font-weight: 600; font-size: .9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cam-badge {
  font-size: .7rem; font-weight: 700; letter-spacing: .05em;
  padding: .15rem .45rem;
  border-radius: 4px;
  background: rgba(63,185,80,.15);
  color: var(--green);
  border: 1px solid rgba(63,185,80,.3);
  flex-shrink: 0;
}

/* ─────────────────────────── States ─────────────────────────── */
.loading-state, .empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: .8rem; min-height: 300px; color: var(--text-muted);
}
.loading-state svg, .empty-state svg { width: 64px; height: 64px; opacity: .4; }
.empty-state p { font-size: 1.05rem; font-weight: 600; color: var(--text); }
.empty-state span { font-size: .85rem; }

.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─────────────────────────── Modal ─────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,.7);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .2s;
}
.modal-backdrop.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 90vw; max-width: 860px;
  max-height: 90vh;
  overflow: hidden;
  display: flex; flex-direction: column;
  transform: translateY(8px);
  transition: transform .2s;
}
.modal-backdrop.open .modal { transform: none; }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .9rem 1.2rem;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1rem; font-weight: 700; }
.modal-close {
  background: none; border: none;
  color: var(--text-muted); font-size: 1.2rem;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.modal-close:hover { color: var(--text); background: var(--surface2); }

.modal-body { padding: 1rem 1.2rem; overflow-y: auto; }

.stream-links {
  display: flex; flex-wrap: wrap; gap: .5rem;
  margin-top: .9rem;
}
.stream-link {
  padding: .35rem .75rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .82rem; font-weight: 500;
  color: var(--text);
  transition: border-color var(--transition), color var(--transition);
}
.stream-link:hover { border-color: var(--accent); color: var(--accent); }

/* ─────────────────────────── Admin / Table ─────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.25rem;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .9rem 1.2rem;
  border-bottom: 1px solid var(--border);
}
.card-header h3 { font-weight: 700; font-size: .95rem; }
.card-body { padding: 1.2rem; }

table { width: 100%; border-collapse: collapse; }
th {
  text-align: left; padding: .55rem .9rem;
  font-size: .75rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .05em;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}
td {
  padding: .65rem .9rem;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }

/* ─────────────────────────── Buttons ─────────────────────────── */
.btn {
  padding: .4rem .85rem;
  border-radius: var(--radius);
  font-size: .85rem; font-weight: 600;
  border: none; cursor: pointer;
  transition: opacity var(--transition), background var(--transition);
  display: inline-flex; align-items: center; gap: .4rem;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-h); }
.btn-danger { background: rgba(248,81,73,.15); color: var(--red); border: 1px solid rgba(248,81,73,.3); }
.btn-danger:hover { background: rgba(248,81,73,.25); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); border-color: var(--text-muted); }

/* ─────────────────────────── Form ─────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-label {
  display: block; font-size: .78rem; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em;
  margin-bottom: .35rem;
}
.form-input, .form-select {
  width: 100%; padding: .55rem .8rem;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text);
  font-size: .9rem; outline: none;
  transition: border-color var(--transition);
}
.form-input:focus, .form-select:focus { border-color: var(--accent); }
.form-hint { font-size: .78rem; color: var(--text-muted); margin-top: .3rem; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ─────────────────────────── Badge ─────────────────────────── */
.badge {
  display: inline-block;
  font-size: .7rem; font-weight: 700; letter-spacing: .04em;
  padding: .12rem .45rem; border-radius: 4px;
}
.badge-admin { background: rgba(47,129,247,.15); color: var(--accent); border: 1px solid rgba(47,129,247,.3); }
.badge-viewer { background: rgba(139,148,158,.12); color: var(--text-muted); border: 1px solid var(--border); }
.badge-on { background: rgba(63,185,80,.12); color: var(--green); border: 1px solid rgba(63,185,80,.3); }
.badge-off { background: rgba(248,81,73,.1); color: var(--red); border: 1px solid rgba(248,81,73,.25); }

/* ─────────────────────────── Dialog ─────────────────────────── */
.dialog-backdrop {
  position: fixed; inset: 0; z-index: 600;
  background: rgba(0,0,0,.7);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .15s;
}
.dialog-backdrop.open { opacity: 1; pointer-events: all; }
.dialog {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); width: 480px; max-width: 94vw;
  transform: translateY(6px); transition: transform .15s;
}
.dialog-backdrop.open .dialog { transform: none; }
.dialog-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .9rem 1.2rem; border-bottom: 1px solid var(--border);
}
.dialog-header h3 { font-size: .95rem; font-weight: 700; }
.dialog-body { padding: 1.2rem; }
.dialog-footer {
  display: flex; justify-content: flex-end; gap: .6rem;
  padding: .9rem 1.2rem; border-top: 1px solid var(--border);
}

/* ─────────────────────────── Toast ─────────────────────────── */
.toast-container {
  position: fixed; bottom: 1.2rem; right: 1.2rem;
  z-index: 999; display: flex; flex-direction: column; gap: .5rem;
}
.toast {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .7rem 1rem;
  font-size: .85rem; max-width: 320px;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
  animation: slideIn .2s ease;
}
.toast.success { border-color: rgba(63,185,80,.4); color: var(--green); }
.toast.error   { border-color: rgba(248,81,73,.4);  color: var(--red); }
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ─────────────────────────── Buttons (secondary) ─────────────────────────── */
.btn-secondary {
  background: var(--surface2); color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--text-muted); }

/* ─────────────────────────── Page tabs (admin sub-nav) ─────────────────────────── */
.page-tabs {
  display: flex; gap: 0; flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: 0 1.25rem;
}
.page-tab {
  padding: .65rem 1.1rem;
  font-size: .85rem; font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer; background: none; border-top: none; border-left: none; border-right: none;
  transition: color var(--transition), border-color var(--transition);
}
.page-tab:hover { color: var(--text); }
.page-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ─────────────────────────── Group filter bar (cameras page) ─────────────────────────── */
.group-bar {
  display: flex; align-items: center; gap: .4rem;
  padding: .55rem 1.25rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto; flex-shrink: 0;
  scrollbar-width: thin;
}
.group-bar::-webkit-scrollbar { height: 3px; }
.group-bar::-webkit-scrollbar-track { background: transparent; }
.group-bar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.group-pill {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .22rem .7rem;
  border-radius: 20px; border: 1px solid var(--border);
  background: var(--surface2); color: var(--text-muted);
  font-size: .78rem; font-weight: 600;
  cursor: pointer; white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.group-pill:hover { border-color: var(--text-muted); color: var(--text); }
.group-pill.active { border-color: var(--accent); color: var(--accent); background: rgba(47,129,247,.1); }
.group-pill .pill-count {
  font-size: .68rem; font-weight: 700;
  background: var(--surface); border-radius: 10px;
  padding: 0 .35rem; color: inherit;
}
.group-pill.active .pill-count { background: rgba(47,129,247,.15); }

/* Group section header inside grid */
.group-section-hdr {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: .5rem;
  padding: .1rem 0 .25rem;
  font-size: .78rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .06em;
  border-bottom: 1px solid var(--border-soft);
  margin-top: .25rem;
}
.group-section-hdr:first-child { margin-top: 0; }

/* ─────────────────────────── Group chips (user-form quick-select) ─────────────────────────── */
.cam-groups-row {
  display: flex; align-items: center; flex-wrap: wrap; gap: .3rem;
  padding: .3rem .55rem; border-bottom: 1px solid var(--border);
}
.cam-groups-label {
  font-size: .67rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .05em; white-space: nowrap;
  margin-right: .1rem;
}
.group-chip {
  font-size: .7rem; font-weight: 600;
  padding: .12rem .55rem; border-radius: 12px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text-muted); cursor: pointer;
  transition: all .12s;
}
.group-chip:hover { border-color: var(--accent); color: var(--accent); }
.group-chip.partial { border-color: var(--yellow); color: var(--yellow); }
.group-chip.full { border-color: var(--green); color: var(--green); background: rgba(63,185,80,.08); }

/* ─────────────────────────── Modal auto-scale helper ─────────────────────────── */
.modal-backdrop.scale-mode { align-items: flex-start; padding-top: 1rem; }

/* ─────────────────────────── Responsive ─────────────────────────── */
/* Sidebar backdrop — shown on mobile when sidebar is open */
#sidebarBackdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 799; /* below sidebar (800) but above all page content */
}
#sidebarBackdrop.visible { display: block; }

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform .25s ease;
    z-index: 800; /* above all page content on mobile */
  }
  .sidebar.open { transform: none; }
  .main { margin-left: 0; }
  .cam-grid { --cols: 1 !important; }
  .form-row { grid-template-columns: 1fr; }
  .search-wrap input { width: 140px; }
  .search-wrap input:focus { width: 170px; }

  /* Modals & dialogs: full-width on mobile */
  .modal-backdrop { padding: 8px !important; align-items: flex-start !important; }
  .modal-box, .dlg {
    min-width: 0 !important;
    width: 100% !important;
    max-width: calc(100vw - 16px) !important;
    box-sizing: border-box;
  }

  /* Topbar: tighter on mobile */
  .topbar { padding: 0 .75rem; gap: .5rem; }
  .topbar-title { font-size: .9rem; }

  /* Buttons: ensure minimum touch target */
  .btn { min-height: 34px; }
  .btn-sm { padding: 6px 10px !important; font-size: 0.8rem !important; min-height: 32px; }

  /* Tables: horizontal scroll hint */
  .table-wrap { -webkit-overflow-scrolling: touch; }
}

/* ─────────────────────────── Large screens (UTMC control rooms) ─────────────────────────── */
@media (min-width: 1280px) {
  :root { --sidebar-w: 240px; }
  .topbar { padding: 0 1.75rem; gap: 1.25rem; }
  .btn { padding: .38rem .9rem; font-size: .88rem; }
  .btn-sm { padding: .3rem .72rem; }
  .sidebar-nav .nav-item { padding: .55rem 1.1rem; font-size: .9rem; }
}

/* ─────────────────────────── Light theme ─────────────────────────── */
body.light-theme {
  --bg:          #ffffff;
  --surface:     #f6f8fa;
  --surface2:    #eaeef2;
  --border:      #d0d7de;
  --border-soft: #d8dee4;
  --text:        #24292f;
  --text-muted:  #57606a;
  --accent:      #0969da;
  --accent-h:    #0860ca;
  --green:       #1a7f37;
  --red:         #d1242f;
  --yellow:      #9a6700;
}
body.light-theme .modal-backdrop { background: rgba(0,0,0,.45); }
body.light-theme .toast { box-shadow: 0 2px 10px rgba(0,0,0,.12); }