/* ============================================================
   Design tokens — change these to retheme the whole site
   ============================================================ */
:root {
  --accent:       #2563eb;
  --accent-light: #dbeafe;
  --text:         #1e293b;
  --text-muted:   #64748b;
  --bg:           #f1f5f9;
  --card:         #ffffff;
  --border:       #e2e8f0;
  --success:      #16a34a;
  --danger:       #dc2626;
  --radius:       8px;
}

/* ============================================================
   Reset & base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* ============================================================
   Navigation
   ============================================================ */
nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  height: 56px;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  margin-right: auto;
}

nav a {
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
}

nav a:hover, nav a.active {
  color: var(--accent);
  background: var(--accent-light);
  text-decoration: none;
}

#adminBtn {
  margin-left: 0.5rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
}

#adminBtn:hover { border-color: var(--accent); color: var(--accent); }
#adminBtn.active { background: var(--accent); color: white; border-color: var(--accent); }

/* ============================================================
   Page layout
   ============================================================ */
main {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

h1 { font-size: 1.6rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.2rem; margin-bottom: 1rem; }

.page-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

/* ============================================================
   Chart
   ============================================================ */
.chart-wrap {
  position: relative;
  height: 340px;
}

.range-btns {
  display: flex;
  gap: 0.35rem;
}

.range-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
}

.range-btn:hover { border-color: var(--accent); color: var(--accent); }
.range-btn.active { background: var(--accent); color: white; border-color: var(--accent); }

/* ============================================================
   Table
   ============================================================ */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th {
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0.6rem 0.75rem;
  border-bottom: 2px solid var(--border);
}

td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg); }

.gain  { color: var(--danger); font-weight: 600; }
.loss  { color: var(--success); font-weight: 600; }

/* ============================================================
   Workout & recipe items
   ============================================================ */
.item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  margin-bottom: 1rem;
  overflow: hidden;
}

.item-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  user-select: none;
}

.item-header:hover { background: var(--bg); }

.item-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.item-name { font-weight: 600; flex: 1; }

.item-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag {
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

.item-body {
  display: none;
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
}

.item-body.open { display: block; }

.item-body h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 1rem 0 0.4rem;
}

.item-body pre {
  white-space: pre-wrap;
  font-family: inherit;
  font-size: 0.9rem;
}

/* ============================================================
   Admin form
   ============================================================ */
.admin-panel {
  display: none;
  border: 1px dashed var(--accent);
  border-radius: var(--radius);
  background: var(--accent-light);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.admin-panel.visible { display: block; }

.admin-panel h2 {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.3rem; }

label { font-size: 0.82rem; font-weight: 600; color: var(--text-muted); }

input, textarea, select {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-family: inherit;
  font-size: 0.9rem;
  background: white;
  color: var(--text);
}

input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

textarea { resize: vertical; min-height: 90px; }

.form-full { grid-column: 1 / -1; }

.btn {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { opacity: 0.9; }

.btn-danger {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
}

.btn-danger:hover { text-decoration: underline; }

/* ============================================================
   Modal (admin login)
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  width: 360px;
  max-width: 90vw;
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.modal h2 { margin-bottom: 1rem; font-size: 1.1rem; }

.modal input {
  width: 100%;
  margin-bottom: 1rem;
}

.modal-actions { display: flex; gap: 0.75rem; justify-content: flex-end; }

.btn-secondary {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ============================================================
   Empty state
   ============================================================ */
.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 600px) {
  nav { gap: 0; }
  .nav-brand { font-size: 0.95rem; }
  nav a { padding: 0.4rem 0.5rem; font-size: 0.82rem; }
  main { padding: 1.25rem 1rem; }
}