:root {
  --bg: #0f1420;
  --card: #1a2233;
  --card-2: #222c42;
  --text: #e7ecf5;
  --muted: #8c98b0;
  --accent: #4f8cff;
  --accent-dark: #3a6fd0;
  --danger: #e25563;
  --border: #2c3852;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-text-size-adjust: 100%;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 700; font-size: 1.05rem; color: var(--text); text-decoration: none; }
.topbar nav { display: flex; gap: 1rem; }
.topbar nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.topbar nav a:hover { color: var(--text); }

.container { max-width: 760px; margin: 0 auto; padding: 1rem 1rem 6rem; }

h1 { font-size: 1.4rem; margin: 0.2rem 0 1rem; }
h2 { font-size: 1.1rem; margin: 0 0 0.3rem; }
h3 { font-size: 1.02rem; margin: 0; }

.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

.flash {
  background: #243a2a;
  border: 1px solid #356b46;
  color: #b9f0c9;
  border-radius: var(--radius);
  padding: 0.6rem 1rem;
  margin-bottom: 1rem;
}
.flash p { margin: 0.2rem 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.9rem;
}

/* Routine grid */
.grid { display: grid; grid-template-columns: 1fr; gap: 0.9rem; }
@media (min-width: 560px) { .grid { grid-template-columns: 1fr 1fr; } }
.routine-card { display: block; text-decoration: none; color: var(--text); transition: border-color .15s, transform .05s; }
.routine-card:hover { border-color: var(--accent); }
.routine-card:active { transform: scale(0.99); }

.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.back { color: var(--muted); text-decoration: none; font-size: 0.9rem; display: inline-block; margin-bottom: 0.3rem; }
.back:hover { color: var(--text); }

.exercise-list { display: flex; flex-direction: column; }
.ex-head { display: flex; align-items: baseline; justify-content: space-between; gap: 0.6rem; }
.notes { color: var(--muted); font-size: 0.88rem; font-style: italic; margin: 0.35rem 0 0.5rem; }
.label { font-size: 0.8rem; color: var(--muted); margin: 0.5rem 0 0.3rem; text-transform: uppercase; letter-spacing: .03em; }
.pb { font-size: 0.78rem; color: #ffd479; white-space: nowrap; }

.sets { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.set-chip {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  font-size: 0.85rem;
}

/* Set entry grid */
.set-grid { margin-top: 0.7rem; }
.set-grid-head, .set-grid-row {
  display: grid;
  grid-template-columns: 3.2rem 1fr 1fr 3.2rem;
  gap: 0.5rem;
  align-items: center;
}
.set-grid-head { font-size: 0.75rem; color: var(--muted); margin-bottom: 0.35rem; text-transform: uppercase; }
.set-grid-row { margin-bottom: 0.45rem; }
.set-num { font-size: 0.9rem; color: var(--muted); }
.last-col { text-align: right; }

input[type="number"], input[type="text"], input[type="password"], input[type="date"] {
  width: 100%;
  padding: 0.6rem 0.6rem;
  font-size: 1rem;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
}
input:focus { outline: none; border-color: var(--accent); }

label { display: block; margin-bottom: 0.8rem; font-size: 0.9rem; color: var(--muted); }
label input { margin-top: 0.3rem; }
.date-label { margin-bottom: 0; max-width: 220px; }

.btn {
  display: inline-block;
  border: none;
  border-radius: 12px;
  padding: 0.7rem 1.1rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); }
.btn.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn.big { width: 100%; padding: 0.95rem; font-size: 1.05rem; }

.sticky-action {
  position: sticky;
  bottom: 0;
  padding: 0.8rem 0 0.2rem;
  background: linear-gradient(to top, var(--bg) 70%, transparent);
  margin-top: 0.5rem;
}

.login-card { max-width: 380px; margin: 3rem auto 0; }

.history-row { display: flex; align-items: center; gap: 0.8rem; text-decoration: none; color: var(--text); }
.h-date { font-variant-numeric: tabular-nums; color: var(--muted); min-width: 6.5rem; }
.h-name { flex: 1; font-weight: 600; }

.delete-form { margin-top: 1.5rem; }

/* Charts */
.chart-card .label { margin-top: 0; }
.chart { width: 100%; height: auto; display: block; }
.spark-wrap { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.5rem; }
.spark { width: 120px; height: 34px; flex: 0 0 auto; }
.plain { color: var(--text); text-decoration: none; }
.plain:hover { color: var(--accent); }