:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface2: #243044;
  --text: #e8eef4;
  --muted: #8b9cb3;
  --accent: #3dd68c;
  --accent-dim: #2a9d63;
  --amber: #f5a623;
  --red: #ef5350;
  --border: #2d3a4f;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0,0,0,.35);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; }

.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 260px; background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 1.25rem; flex-shrink: 0;
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 700; font-size: 1.1rem; margin-bottom: 1.5rem; }
.brand-icon { color: var(--accent); }
.sidebar-nav { display: flex; flex-direction: column; gap: .25rem; flex: 1; }
.sidebar-nav a {
  color: var(--muted); text-decoration: none; padding: .6rem .75rem; border-radius: 8px;
}
.sidebar-nav a:hover, .sidebar-nav a.active { background: var(--surface2); color: var(--text); }
.sidebar-footer { font-size: .85rem; color: var(--muted); border-top: 1px solid var(--border); padding-top: 1rem; }
.sidebar-footer a { color: var(--accent); }

.main-wrap { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex; align-items: center; gap: 1rem; padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border); background: var(--surface);
}
.topbar h1 { margin: 0; font-size: 1.35rem; font-weight: 600; }
.menu-toggle { display: none; background: var(--surface2); border: none; color: var(--text); padding: .5rem .75rem; border-radius: 8px; cursor: pointer; }
.content { padding: 1.5rem; flex: 1; }

.disclaimer-banner {
  background: var(--surface2); border-left: 4px solid var(--amber);
  padding: .75rem 1rem; border-radius: var(--radius); margin-bottom: 1.25rem; font-size: .9rem;
}
.disclaimer-banner p { margin: 0; }
.flat-stomach-note { font-size: .9rem; color: var(--muted); }

.grid { display: grid; gap: 1rem; margin-bottom: 1.25rem; }
.cards-4 { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.cards-3 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.cards-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.form-2 { grid-template-columns: 1fr 1fr; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem; box-shadow: var(--shadow);
}
.card h2, .card h3 { margin-top: 0; }
.stat-card .label { display: block; font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stat-card .value { font-size: 1.5rem; font-weight: 700; }
.stat-card .sub { font-size: .8rem; color: var(--muted); }

.card-warning { border-width: 2px; }
.card-green { border-color: var(--accent-dim); }
.card-amber { border-color: var(--amber); background: rgba(245,166,35,.08); }
.card-red { border-color: var(--red); background: rgba(239,83,80,.1); }

.focus-flat { border-top: 3px solid var(--accent); }
.focus-muscle { border-top: 3px solid #5b8def; }

.quick-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.btn {
  display: inline-block; padding: .55rem 1rem; border-radius: 8px; text-decoration: none;
  border: none; cursor: pointer; font-size: .9rem; font-weight: 600;
}
.btn-primary { background: var(--accent); color: #0a1612; }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-sm { padding: .35rem .7rem; font-size: .8rem; }

.data-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.data-table th, .data-table td { padding: .6rem .75rem; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { color: var(--muted); font-weight: 600; }
.data-table.compact td { padding: .4rem .5rem; }

.form-card label { display: block; margin-bottom: .75rem; font-size: .9rem; }
.form-card input, .form-card select, .form-card textarea {
  width: 100%; margin-top: .25rem; padding: .5rem .65rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
.checkbox { display: flex !important; align-items: center; gap: .5rem; }
.checkbox input { width: auto; }

.alert { padding: .75rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.alert-error { background: rgba(239,83,80,.15); border: 1px solid var(--red); }
.alert-success { background: rgba(61,214,140,.12); border: 1px solid var(--accent); }
.alert-warning { background: rgba(245,166,35,.12); border: 1px solid var(--amber); }

.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 1rem; }
.auth-card {
  background: var(--surface); padding: 2rem; border-radius: var(--radius); max-width: 400px; width: 100%;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.value-lg { font-size: 2rem; font-weight: 700; }
.tag { display: inline-block; background: var(--surface2); padding: .25rem .5rem; border-radius: 6px; margin: .2rem; font-size: .8rem; }
.equip-grid { display: flex; flex-wrap: wrap; gap: .25rem; }
.meal-rec { border-bottom: 1px solid var(--border); padding: .75rem 0; }
.warn-text { color: var(--amber); }
.history-list { list-style: none; padding: 0; margin: 0; }
.history-list li { padding: .35rem 0; border-bottom: 1px solid var(--border); }

@media (max-width: 768px) {
  .sidebar {
    position: fixed; left: -280px; top: 0; bottom: 0; z-index: 100; transition: left .2s;
  }
  .sidebar.open { left: 0; }
  .menu-toggle { display: block; }
  .form-2 { grid-template-columns: 1fr; }
}