* { box-sizing: border-box; margin: 0; }
:root {
  --bg: #0f1115; --panel: #181b22; --panel2: #1f232d; --border: #2a2f3a;
  --text: #e8eaf0; --muted: #9aa1b0; --accent: #a3e635; --accent-dark: #65a30d;
  --danger: #f87171; --gold: #fbbf24;
}
html, body { height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding-bottom: 70px;
}
#app { max-width: 860px; margin: 0 auto; padding: 16px 14px 30px; }
h1 { font-size: 1.5rem; margin: 8px 0 14px; }
h2 { font-size: 1.15rem; margin: 18px 0 10px; }
.muted { color: var(--muted); font-size: .88rem; }
.hidden { display: none !important; }

/* tab bar */
#tabbar {
  position: fixed; bottom: 0; left: 0; right: 0; display: flex;
  background: var(--panel); border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom); z-index: 10;
}
#tabbar button {
  flex: 1; background: none; border: none; color: var(--muted);
  font-size: 1.25rem; padding: 8px 0 6px; cursor: pointer; display: flex;
  flex-direction: column; align-items: center; gap: 2px;
}
#tabbar button span { font-size: .62rem; letter-spacing: .02em; }
#tabbar button.active { color: var(--accent); }

/* cards & inputs */
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 14px; margin-bottom: 12px;
}
input, select, textarea {
  width: 100%; background: var(--panel2); border: 1px solid var(--border);
  color: var(--text); border-radius: 10px; padding: 10px 12px; font-size: 1rem;
}
input:focus, select:focus { outline: 1px solid var(--accent-dark); }
label { display: block; font-size: .8rem; color: var(--muted); margin: 10px 0 4px; }
button.btn {
  background: var(--accent); color: #111; border: none; border-radius: 10px;
  padding: 11px 18px; font-size: 1rem; font-weight: 700; cursor: pointer; width: 100%;
}
button.btn.secondary { background: var(--panel2); color: var(--text); border: 1px solid var(--border); }
button.btn.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
button.btn.small { width: auto; padding: 7px 14px; font-size: .88rem; }
.row { display: flex; gap: 10px; align-items: center; }
.row > * { flex: 1; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 8px; }

/* chips */
.chip {
  display: inline-block; background: var(--panel2); border: 1px solid var(--border);
  color: var(--muted); border-radius: 999px; padding: 3px 10px; font-size: .75rem;
  margin: 2px 4px 2px 0; text-transform: capitalize;
}
.chip.accent { color: var(--accent); border-color: var(--accent-dark); }
.chip.gold { color: var(--gold); border-color: var(--gold); }

/* exercise grid */
.filters { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }
.filters input { grid-column: 1 / -1; }
.ex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
.ex-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; cursor: pointer; transition: border-color .15s;
}
.ex-card:hover { border-color: var(--accent-dark); }
.ex-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; background: #000; }
.ex-card .pad { padding: 8px 10px 10px; }
.ex-card .name { font-size: .88rem; font-weight: 600; line-height: 1.25; }

/* modal */
#modal-root .overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.65); z-index: 20;
  display: flex; align-items: flex-end; justify-content: center;
}
#modal-root .sheet {
  background: var(--panel); border: 1px solid var(--border); border-bottom: none;
  border-radius: 18px 18px 0 0; width: 100%; max-width: 860px;
  max-height: 88vh; overflow-y: auto; padding: 18px 16px 26px;
}
@media (min-width: 700px) {
  #modal-root .overlay { align-items: center; }
  #modal-root .sheet { border-radius: 18px; border-bottom: 1px solid var(--border); }
}
.sheet img.hero { width: 100%; max-height: 320px; object-fit: contain; background: #fff; border-radius: 12px; }
.steps { padding-left: 20px; margin: 10px 0; }
.steps li { margin-bottom: 8px; color: var(--muted); font-size: .92rem; line-height: 1.45; }
.closex { float: right; background: none; border: none; color: var(--muted); font-size: 1.5rem; cursor: pointer; }

/* session */
.set-chip {
  display: inline-block; background: var(--accent-dark); color: #fff;
  border-radius: 8px; padding: 4px 9px; font-size: .8rem; margin: 3px 4px 0 0; font-weight: 600;
}
.session-ex { margin-bottom: 12px; }
.session-ex img { width: 64px; height: 48px; object-fit: cover; border-radius: 8px; background: #000; }
.counter-row { display: flex; gap: 8px; margin-top: 10px; }
.counter-row input { text-align: center; font-size: 1.1rem; font-weight: 700; }
.done-badge { color: var(--accent); font-weight: 700; }

/* stats */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.stat .num { font-size: 1.6rem; font-weight: 800; color: var(--accent); }
.stat .lbl { font-size: .78rem; color: var(--muted); margin-top: 2px; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: .78rem; }
td.r, th.r { text-align: right; }

/* auth */
.auth-wrap { max-width: 380px; margin: 8vh auto 0; }
.auth-wrap .logo { font-size: 2.6rem; text-align: center; }
.auth-wrap h1 { text-align: center; }
.error { color: var(--danger); font-size: .88rem; margin-top: 8px; min-height: 1.2em; }
.banner {
  background: linear-gradient(90deg, #1c2a10, #14330f); border: 1px solid var(--accent-dark);
  border-radius: 12px; padding: 12px 14px; margin-bottom: 14px; cursor: pointer;
}