:root {
  /* Backgrounds — lighter, cool-neutral */
  --color-bg:           #131315;
  --color-surface:      #1D1D23;
  --color-surface-alt:  #252532;
  --color-border:       #38384C;

  /* Accent — Scarlet Red */
  --color-accent:       #D93535;
  --color-accent-hover: #E84848;
  --color-accent-muted: rgba(217, 53, 53, 0.13);

  /* Semantic */
  --color-success:      #4CAF7A;
  --color-error:        #CC2222;
  --color-warning:      #D4922A;
  --color-info:         #5B8EE0;

  /* Text */
  --color-text:         #F0ECEF;
  --color-text-muted:   #9088A0;

  /* Typography */
  --font-heading:       'Outfit', system-ui, sans-serif;
  --font-body:          'Outfit', system-ui, sans-serif;
  --font-mono:          'JetBrains Mono', monospace;

  /* Radius */
  --radius-sm:          6px;
  --radius-md:          12px;
  --radius-full:        999px;

  /* Transitions */
  --transition-fast:    160ms ease;
  --transition-modal:   240ms cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html { height: 100%; }

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
}

/* Sticky footer layout — applied via .page-layout class on non-admin body */
body.page-layout {
  display: flex;
  flex-direction: column;
}
body.page-layout > main {
  flex: 1;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-accent-hover); }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  letter-spacing: 0.01em;
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #ffffff;
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}
.btn-secondary:hover {
  background: var(--color-accent-muted);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover { color: var(--color-text); border-color: rgba(217, 53, 53, 0.35); }

.btn-danger {
  background: var(--color-error);
  color: #fff;
}
.btn-danger:hover { background: #D93535; }

.btn-sm { padding: 7px 16px; font-size: 0.8125rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }

/* ── Inputs ──────────────────────────────────────────────────────────────── */
.input {
  width: 100%;
  padding: 11px 14px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
  outline: none;
}
.input::placeholder { color: var(--color-text-muted); }
.input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-muted);
}
.input.error {
  border-color: var(--color-error);
}

label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.card:hover {
  border-color: rgba(217, 53, 53, 0.40);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(217, 53, 53, 0.08);
}

/* ── Badges ──────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-accent  { background: var(--color-accent-muted); color: var(--color-accent); }
.badge-success { background: rgba(76, 175, 122, 0.13); color: var(--color-success); }
.badge-error   { background: rgba(204, 34, 34, 0.13);  color: var(--color-error); }
.badge-warning { background: rgba(212, 146, 42, 0.15); color: var(--color-warning); }
.badge-info    { background: rgba(91, 142, 224, 0.13); color: var(--color-info); }
.badge-muted   { background: rgba(144, 136, 160, 0.13); color: var(--color-text-muted); }

/* ── Skeleton ────────────────────────────────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}
.skeleton {
  background: linear-gradient(90deg,
    var(--color-surface-alt) 25%,
    var(--color-border) 50%,
    var(--color-surface-alt) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
  border-radius: var(--radius-sm);
}

/* ── Glass ───────────────────────────────────────────────────────────────── */
.glass {
  background: rgba(20, 20, 26, 0.93);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
}

/* ── Utilities ───────────────────────────────────────────────────────────── */
.text-muted   { color: var(--color-text-muted); }
.text-accent  { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-error   { color: var(--color-error); }
.text-info    { color: var(--color-info); }
.mono         { font-family: var(--font-mono); }
.divider      { border: none; border-top: 1px solid var(--color-border); margin: 24px 0; }

/* ── Navbar ──────────────────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 62px;
  display: flex;
  align-items: center;
  padding: 0 40px;
  background: rgba(16, 16, 18, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  gap: 32px;
}

.navbar-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.navbar-logo em {
  font-style: normal;
  color: var(--color-accent);
}

.navbar-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}
.navbar-links a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
  position: relative;
}
.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-fast);
  border-radius: 2px;
}
.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-text);
}
.navbar-links a:hover::after,
.navbar-links a.active::after {
  width: 100%;
}

.navbar-actions { display: flex; align-items: center; gap: 16px; }

/* ── Chat FABs ───────────────────────────────────────────────────────────── */
.chat-fabs {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 200;
  display: flex;
  flex-direction: column-reverse;
  gap: 10px;
  align-items: flex-end;
}
.chat-fab {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 12px rgba(0,0,0,0.5);
  position: relative;
}
.chat-fab:hover { transform: translateY(-2px); }
.chat-fab-public  { background: var(--color-surface-alt); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.chat-fab-public:hover { color: var(--color-text); border-color: rgba(217, 53, 53, 0.35); }
.chat-fab-support { background: var(--color-accent); color: #fff; }
.chat-fab-support:hover { background: var(--color-accent-hover); }

.chat-unread {
  position: absolute;
  top: -3px;
  right: -3px;
  min-width: 17px;
  height: 17px;
  background: var(--color-warning);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.625rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 3px;
}

/* ── Chat Window ─────────────────────────────────────────────────────────── */
.chat-window {
  position: fixed;
  bottom: 92px;
  right: 28px;
  width: 420px;
  height: 560px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 199;
  transform-origin: bottom right;
  animation: chat-open var(--transition-modal) forwards;
  user-select: none;
}
@keyframes chat-open {
  from { opacity: 0; transform: scale(0.94) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.chat-header {
  padding: 11px 16px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  cursor: grab;
}
.chat-header:active { cursor: grabbing; }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  user-select: text;
}

.chat-msg-row {
  display: flex;
  gap: 7px;
  align-items: flex-end;
}
.chat-msg-row.own { flex-direction: row-reverse; }

.chat-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
}
.chat-avatar img { width: 100%; height: 100%; display: block; }

.chat-msg-body { display: flex; flex-direction: column; max-width: 72%; }
.chat-msg-row.own .chat-msg-body { align-items: flex-end; }

.chat-author {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
  padding: 0 4px;
}

.chat-message {
  padding: 6px 11px;
  border-radius: 14px;
  font-size: 0.8125rem;
  line-height: 1.45;
  word-break: break-word;
}
.chat-message.own {
  background: var(--color-accent);
  color: #ffffff;
  border-bottom-right-radius: 3px;
}
.chat-message.other {
  color: var(--color-text);
  border-bottom-left-radius: 3px;
}

.chat-input-row {
  padding: 9px 12px;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 8px;
}
.chat-input-row .input { flex: 1; padding: 7px 11px; font-size: 0.8125rem; }

/* ── Modal ───────────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal {
  width: min(480px, 95vw);
  border-radius: var(--radius-md);
  padding: 32px;
  animation: modal-open var(--transition-modal) forwards;
}
@keyframes modal-open {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Tree caret ──────────────────────────────────────────────────────────── */
.tree-caret {
  display: inline-block;
  transition: transform 0.22s ease;
}
.tree-caret.open {
  transform: rotate(90deg);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .navbar { padding: 0 18px; }
  .navbar-links { display: none; }
  .chat-window { width: calc(100vw - 16px); right: 8px; bottom: 76px; height: 480px; }
}