*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-w:   240px;
  --primary:     #FF6B35;
  --primary-dk:  #e55a25;
  --success:     #27AE60;
  --danger:      #E74C3C;
  --warn:        #F39C12;
  --info:        #2980B9;
  --bg:          #F0F2F5;
  --card:        #FFFFFF;
  --sidebar-bg:  #1A2234;
  --sidebar-txt: #A8B4C8;
  --sidebar-act: #FFFFFF;
  --text:        #2C3E50;
  --muted:       #7F8C8D;
  --border:      #E0E4E8;
  --radius:      10px;
  --shadow:      0 2px 12px rgba(0,0,0,.07);
}

html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

/* ── Layout ─────────────────────────────────────────────── */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 24px 20px 20px;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar-brand span { color: var(--primary); }

.sidebar-section { padding: 16px 12px 4px; font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: rgba(255,255,255,.3); }

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--sidebar-txt);
  text-decoration: none;
  border-radius: 8px;
  margin: 2px 8px;
  transition: background .15s, color .15s;
  font-size: .92rem;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: rgba(255,255,255,.09);
  color: var(--sidebar-act);
}
.sidebar nav a.active { background: var(--primary); color: #fff; }

.sidebar-footer {
  margin-top: auto;
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: .82rem;
  color: var(--sidebar-txt);
}
.sidebar-footer a { color: var(--sidebar-txt); cursor: pointer; }
.sidebar-footer a:hover { color: #fff; }

.main { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; }

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-title { font-size: 1rem; font-weight: 600; }
.topbar-user  { font-size: .85rem; color: var(--muted); }

.content { padding: 28px; flex: 1; }

/* ── Cards ──────────────────────────────────────────────── */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px 24px; }
.card-title { font-size: 1rem; font-weight: 600; margin-bottom: 16px; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }

.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-left: 4px solid var(--primary);
}
.stat-card.green  { border-color: var(--success); }
.stat-card.yellow { border-color: var(--warn); }
.stat-card.red    { border-color: var(--danger); }
.stat-card.blue   { border-color: var(--info); }

.stat-label { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.stat-value { font-size: 2rem; font-weight: 700; line-height: 1; }

/* ── Table ──────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; padding: 10px 12px; font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); border-bottom: 2px solid var(--border); }
td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #fafbfc; }

/* ── Badges ─────────────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 100px; font-size: .75rem; font-weight: 600; }
.badge-green  { background: #eafaf1; color: var(--success); }
.badge-yellow { background: #fef9e7; color: var(--warn);    }
.badge-red    { background: #fdf2f2; color: var(--danger);  }
.badge-blue   { background: #eaf0ff; color: var(--info);    }
.badge-gray   { background: #f0f2f5; color: var(--muted);   }

/* ── Buttons ────────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; border: none; cursor: pointer; font-size: .87rem; font-weight: 500; transition: opacity .15s, transform .1s; }
.btn:hover  { opacity: .88; }
.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--primary); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger  { background: var(--danger);  color: #fff; }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-sm      { padding: 5px 10px; font-size: .8rem; }

/* ── Form ───────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
label       { display: block; font-size: .85rem; font-weight: 500; margin-bottom: 6px; }
input, select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: .9rem;
  color: var(--text);
  background: #fff;
  transition: border-color .15s;
}
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,107,53,.12); }

/* ── Modal ──────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  opacity: 0; pointer-events: none;
  transition: opacity .2s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 8px 48px rgba(0,0,0,.2);
  padding: 28px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(12px);
  transition: transform .2s;
}
.modal-overlay.open .modal { transform: translateY(0); }

.modal-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ── Alerts ─────────────────────────────────────────────── */
.alert { padding: 12px 16px; border-radius: 8px; font-size: .88rem; margin-bottom: 16px; }
.alert-success { background: #eafaf1; color: var(--success); }
.alert-error   { background: #fdf2f2; color: var(--danger);  }
.alert-info    { background: #eaf0ff; color: var(--info);    }

/* ── Table grid overlay for tables view ─────────────────── */
.tables-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
.table-tile {
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform .12s, box-shadow .12s;
}
.table-tile:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,.1); }
.table-tile.free  { background: #eafaf1; border-color: var(--success); }
.table-tile.occupied { background: #fff5f0; border-color: var(--primary); }
.table-tile.calling  { background: #fef9e7; border-color: var(--warn); animation: tileAlert 1s ease infinite; }
.table-tile .tile-num { font-size: 1.5rem; font-weight: 700; }
.table-tile .tile-status { font-size: .75rem; color: var(--muted); margin-top: 4px; }

@keyframes tileAlert { 0%,100% { box-shadow: 0 0 0 0 rgba(243,156,18,.4); } 50% { box-shadow: 0 0 0 8px rgba(243,156,18,0); } }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform .25s; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .content { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}