:root {
  --primary: #e8500a;
  --primary-dark: #c44008;
  --bg: #0f0f0f;
  --card-bg: #1a1a1a;
  --card-bg2: #222;
  --border: #2e2e2e;
  --text: #f0f0f0;
  --text-muted: #888;
  --success: #22c55e;
  --danger: #ef4444;
  --push: #e8500a;
  --pull: #3b82f6;
  --legs: #a855f7;
  --rest: #374151;
  --full: #16a34a;
}

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

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* NAV */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 2rem;
  background: #111;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}
.nav-brand span { color: var(--text); }
.nav-links { display: flex; list-style: none; gap: 0.25rem; }
.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  transition: all 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--card-bg2); }

/* USER MENU */
.user-menu { display: flex; align-items: center; gap: 0.75rem; }
.user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.8rem;
}
.btn-signout {
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-signout:hover { border-color: var(--danger); color: var(--danger); }

/* LAYOUT */
.page { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }
.page-header { margin-bottom: 1.75rem; }
.page-header h1 { font-size: 1.6rem; font-weight: 700; }
.page-header p { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.25rem; }

/* CARDS */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}
.card-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* GRID */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--card-bg2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: #555; }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.8rem; }
.btn-lg { padding: 0.7rem 1.5rem; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }

/* FORMS */
.form-group { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 1rem; }
.form-group label { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; }
.form-group input, .form-group select, .form-group textarea {
  padding: 0.6rem 0.85rem;
  background: var(--card-bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

/* TAGS */
.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}
.tag-push { background: rgba(232,80,10,0.15); color: var(--push); }
.tag-pull { background: rgba(59,130,246,0.15); color: var(--pull); }
.tag-legs { background: rgba(168,85,247,0.15); color: var(--legs); }
.tag-core { background: rgba(168,85,247,0.15); color: var(--legs); }
.tag-rest { background: rgba(55,65,81,0.3); color: var(--text-muted); }
.tag-full { background: rgba(22,163,74,0.15); color: var(--full); }

/* TABLE */
.table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.table th { text-align: left; padding: 0.6rem 0.75rem; color: var(--text-muted); font-size: 0.75rem; text-transform: uppercase; border-bottom: 1px solid var(--border); }
.table td { padding: 0.75rem; border-bottom: 1px solid var(--border); }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--card-bg2); }

/* STAT CARDS */
.stat-card { text-align: center; padding: 1.5rem 1rem; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.25rem; }

/* SPLIT BADGE */
.split-push { color: var(--push); }
.split-pull { color: var(--pull); }
.split-legs { color: var(--legs); }
.split-rest { color: var(--text-muted); }

/* MODAL */
.modal-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 200;
  align-items: center;
  justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; }
.modal-header h3 { font-size: 1.1rem; font-weight: 700; }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 1.3rem; cursor: pointer; }

/* EMPTY STATE */
.empty { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }
.empty-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }

/* ALERT */
.alert { padding: 0.75rem 1rem; border-radius: 8px; font-size: 0.875rem; margin-bottom: 1rem; }
.alert-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }
.alert-success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #86efac; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.3s ease; }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}