:root {
  --bg: #0f172a;
  --card: #1e293b;
  --card2: #253347;
  --border: #334155;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --cyan: #06b6d4;
  --purple: #8b5cf6;
  --text: #f1f5f9;
  --text-sec: #94a3b8;
  --text-muted: #64748b;
  --radius: 12px;
  --sidebar-w: 240px;
  --transition: .2s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; font-family: 'Inter', 'Segoe UI', system-ui, sans-serif; }
body { background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* LAYOUT */
.app-layout { display: flex; min-height: 100vh; }

/* SIDEBAR */
.sidebar {
  width: var(--sidebar-w);
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}
.sidebar-logo {
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-logo .logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.sidebar-logo span { font-size: 18px; font-weight: 700; color: var(--text); }
.sidebar-logo small { font-size: 11px; color: var(--text-muted); display: block; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: 12px 0; }
.nav-section { padding: 8px 16px 4px; font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  color: var(--text-sec);
  border-radius: 0;
  transition: background var(--transition), color var(--transition);
  cursor: pointer;
  position: relative;
}
.nav-item:hover { background: rgba(255,255,255,.05); color: var(--text); }
.nav-item.active {
  background: rgba(59,130,246,.15);
  color: var(--accent);
  border-right: 3px solid var(--accent);
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item span { font-size: 13.5px; font-weight: 500; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}
.sidebar-user {
  display: flex; align-items: center; gap: 10px;
  padding: 8px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition);
}
.sidebar-user:hover { background: rgba(255,255,255,.05); }
.sidebar-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; color: #fff;
  flex-shrink: 0;
}
.sidebar-user-info small { font-size: 11px; color: var(--text-muted); }
.sidebar-user-name { font-size: 13px; font-weight: 600; }

/* MAIN CONTENT */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 90;
}
.topbar-title { font-size: 18px; font-weight: 700; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }

.page-content { padding: 24px; flex: 1; }

/* CARDS */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-title { font-size: 15px; font-weight: 600; }

/* STAT CARDS */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 80px; height: 80px;
  border-radius: 50%;
  opacity: .08;
}
.stat-card.accent::before { background: var(--accent); }
.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before { background: var(--danger); }
.stat-card.cyan::before { background: var(--cyan); }

.stat-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
  font-size: 18px;
}
.stat-icon.accent { background: rgba(59,130,246,.2); color: var(--accent); }
.stat-icon.success { background: rgba(34,197,94,.2); color: var(--success); }
.stat-icon.warning { background: rgba(245,158,11,.2); color: var(--warning); }
.stat-icon.danger { background: rgba(239,68,68,.2); color: var(--danger); }
.stat-icon.cyan { background: rgba(6,182,212,.2); color: var(--cyan); }

.stat-value { font-size: 28px; font-weight: 800; line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 12px; color: var(--text-muted); font-weight: 500; }

/* TABLES */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,.02);
}
tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(51,65,85,.5);
  font-size: 13.5px;
  vertical-align: middle;
}
tbody tr { transition: background var(--transition); }
tbody tr:hover { background: rgba(255,255,255,.03); }
tbody tr:last-child td { border-bottom: none; }

/* STATUS BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}
.badge.activa, .badge.verde { background: rgba(34,197,94,.15); color: var(--success); }
.badge.vencida, .badge.rojo { background: rgba(239,68,68,.15); color: var(--danger); }
.badge.congelada, .badge.amarillo { background: rgba(245,158,11,.15); color: var(--warning); }
.badge.cancelada { background: rgba(100,116,139,.15); color: var(--text-muted); }
.badge.info { background: rgba(59,130,246,.15); color: var(--accent); }
.badge.purple { background: rgba(139,92,246,.15); color: var(--purple); }

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-warning { background: var(--warning); color: #000; }
.btn-warning:hover { background: #d97706; }
.btn-ghost {
  background: transparent;
  color: var(--text-sec);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: rgba(255,255,255,.05); color: var(--text); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon { padding: 7px; border-radius: 8px; }
.btn-lg { padding: 12px 24px; font-size: 15px; border-radius: 10px; }

/* FORM ELEMENTS */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-sec); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .4px; }
.form-control {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--text);
  font-size: 13.5px;
  transition: border-color var(--transition);
}
.form-control:focus { outline: none; border-color: var(--accent); }
.form-control::placeholder { color: var(--text-muted); }
select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 80px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* SEARCH BAR */
.search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  flex: 1;
  max-width: 360px;
}
.search-bar input { background: none; border: none; color: var(--text); font-size: 13.5px; flex: 1; outline: none; }
.search-bar svg { color: var(--text-muted); flex-shrink: 0; }

/* FILTERS */
.filters-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }

/* MODAL */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.7);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(.95);
  transition: transform var(--transition);
}
.modal-overlay.active .modal { transform: scale(1); }
.modal-lg { max-width: 900px; }
.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-title { font-size: 16px; font-weight: 700; }
.modal-close { background: none; color: var(--text-muted); font-size: 20px; line-height: 1; padding: 4px 8px; border-radius: 6px; transition: background var(--transition); }
.modal-close:hover { background: rgba(255,255,255,.08); color: var(--text); }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: flex-end; gap: 10px; }

/* TABS */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab-btn {
  padding: 10px 16px;
  background: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* AVATAR */
.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.avatar-placeholder {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; color: #fff;
  flex-shrink: 0;
}

/* SEMAFORO CHECK-IN */
.semaforo { width: 14px; height: 14px; border-radius: 50%; display: inline-block; }
.semaforo.verde { background: var(--success); box-shadow: 0 0 8px var(--success); }
.semaforo.amarillo { background: var(--warning); box-shadow: 0 0 8px var(--warning); }
.semaforo.rojo { background: var(--danger); box-shadow: 0 0 8px var(--danger); }

/* TOAST */
#toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  display: flex; align-items: center; gap: 10px;
  min-width: 280px;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  animation: slideIn .3s ease;
  font-size: 13.5px;
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.warning { border-left: 4px solid var(--warning); }
.toast.info { border-left: 4px solid var(--accent); }
@keyframes slideIn { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideOut { to { transform: translateX(120%); opacity: 0; } }

/* PAGINATION */
.pagination { display: flex; align-items: center; gap: 4px; }
.page-btn {
  width: 32px; height: 32px;
  border-radius: 6px;
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--text-sec);
  font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.page-btn:hover, .page-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.page-btn:disabled { opacity: .4; cursor: not-allowed; }

/* LOADING */
.loading { display: flex; align-items: center; justify-content: center; padding: 40px; color: var(--text-muted); gap: 10px; }
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* EMPTY STATE */
.empty-state { text-align: center; padding: 48px 20px; color: var(--text-muted); }
.empty-state svg { width: 48px; height: 48px; margin: 0 auto 12px; opacity: .4; display: block; }
.empty-state p { font-size: 14px; }

/* CHARTS */
.chart-container { position: relative; height: 260px; }

/* COLOR DOTS */
.color-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

/* MEMBER CARD IN CHECKIN */
.checkin-result {
  background: var(--card2);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  transition: border-color .3s;
}
.checkin-result.verde { border-color: var(--success); }
.checkin-result.amarillo { border-color: var(--warning); }
.checkin-result.rojo { border-color: var(--danger); }
.checkin-avatar { width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 12px; object-fit: cover; }
.checkin-name { font-size: 22px; font-weight: 800; }
.checkin-plan { font-size: 13px; color: var(--text-sec); margin: 4px 0; }
.checkin-dias { font-size: 28px; font-weight: 800; }

/* HORARIO CLASES */
.horario-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }
.horario-dia { font-size: 11px; font-weight: 700; text-align: center; color: var(--text-muted); text-transform: uppercase; padding: 8px 0; }
.clase-slot {
  border-radius: 8px;
  padding: 8px;
  font-size: 12px;
  margin-bottom: 6px;
  border-left: 3px solid;
  background: rgba(255,255,255,.04);
  cursor: pointer;
  transition: transform var(--transition);
}
.clase-slot:hover { transform: scale(1.02); }
.clase-slot-nombre { font-weight: 700; }
.clase-slot-hora { color: var(--text-muted); font-size: 11px; }

/* RUTINAS BUILDER */
.rutina-dias { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.dia-selector {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-sec);
  background: transparent;
}
.dia-selector.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.ejercicio-card {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  transition: border-color var(--transition);
}
.ejercicio-card:hover { border-color: var(--accent); }

/* RESPONSIVE */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .horario-grid { grid-template-columns: repeat(4, 1fr); }
}

/* LOGIN PAGE */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  background-image: radial-gradient(ellipse at 20% 50%, rgba(59,130,246,.08) 0%, transparent 60%),
                    radial-gradient(ellipse at 80% 20%, rgba(139,92,246,.06) 0%, transparent 50%);
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
}
.login-logo {
  text-align: center;
  margin-bottom: 32px;
}
.login-logo-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  margin: 0 auto 12px;
}
.login-logo h1 { font-size: 24px; font-weight: 800; }
.login-logo p { color: var(--text-muted); font-size: 13px; }