:root {
  --bg: #0d0f14;
  --bg-2: #151921;
  --card: #1a1f2b;
  --card-2: #212838;
  --line: #2a3343;
  --text: #e7ecf3;
  --muted: #8b97a8;
  --accent: #5b9dff;
  --accent-2: #4ade80;
  --up: #4ade80;
  --down: #fb7185;
  --hold: #fbbf24;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(0,0,0,.35);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 50% -10%, #182033 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
}

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(13,15,20,.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  padding: 14px 16px 0;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 30px; }
.brand h1 { font-size: 18px; margin: 0; letter-spacing: .2px; }
.brand .sub { margin: 0; font-size: 12px; color: var(--muted); }
.tabs { display: flex; gap: 4px; margin-top: 12px; }
.tabs button {
  flex: 1; background: none; border: none; color: var(--muted);
  font-size: 14px; font-weight: 600; padding: 10px 8px;
  border-bottom: 2px solid transparent; cursor: pointer;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }

/* ---------- layout ---------- */
main { max-width: 680px; margin: 0 auto; padding: 16px 14px 40px; }
.view { display: flex; flex-direction: column; gap: 14px; }
.view-title { margin: 4px 0 0; font-size: 20px; }
.sub-title { margin: 10px 0 2px; font-size: 15px; color: var(--muted); }

/* ---------- session picker ---------- */
.session-picker { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.chip {
  display: flex; flex-direction: column; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line); color: var(--text);
  border-radius: 12px; padding: 10px 12px; cursor: pointer; text-align: left;
}
.chip strong { font-size: 15px; }
.chip-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }
.chip.active { border-color: var(--accent); background: var(--card-2); box-shadow: 0 0 0 1px var(--accent) inset; }

/* ---------- collapsible ---------- */
.collapse { background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.collapse-head {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  background: none; border: none; color: var(--text); font-weight: 600; font-size: 14px;
  padding: 12px 14px; cursor: pointer;
}
.caret { color: var(--muted); }
.collapse-body { padding: 0 14px 12px; }
.collapse-body ul { margin: 4px 0 0; padding-left: 18px; }
.collapse-body li { margin: 5px 0; font-size: 13.5px; color: #cdd6e3; }
.hint { margin: 0 0 4px; font-size: 12.5px; color: var(--muted); font-style: italic; }

/* ---------- exercise cards ---------- */
.ex-list { display: flex; flex-direction: column; gap: 10px; }
.ex {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow);
}
.ex-accessory { background: var(--bg-2); }
.ex-head { display: flex; flex-direction: column; gap: 6px; }
.ex-title { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.ex-name { font-size: 16px; font-weight: 700; }
.yt {
  font-size: 12px; color: var(--accent); text-decoration: none; white-space: nowrap;
  border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px;
}
.yt:hover { background: var(--card-2); }
.ex-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 13px; color: var(--muted); }
.pill { background: var(--card-2); border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; font-size: 11.5px; }
.ex-note { margin: 8px 0 0; font-size: 12.5px; color: var(--muted); }

.rec { margin: 10px 0 4px; font-size: 13px; font-weight: 600; padding: 8px 10px; border-radius: 10px; border: 1px solid var(--line); }
.rec-up { color: var(--up); border-color: rgba(74,222,128,.35); background: rgba(74,222,128,.08); }
.rec-down { color: var(--down); border-color: rgba(251,113,133,.35); background: rgba(251,113,133,.08); }
.rec-hold { color: var(--hold); border-color: rgba(251,191,36,.30); background: rgba(251,191,36,.07); }
.rec-neutral { color: var(--muted); }

.weight-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 10px 0 8px; }
.weight-row span { font-size: 13px; color: var(--muted); }
.weight-row input { width: 130px; }

.sets { display: grid; grid-template-columns: repeat(auto-fit, minmax(64px, 1fr)); gap: 8px; }
.set-input { display: flex; flex-direction: column; gap: 4px; }
.set-input span { font-size: 11px; color: var(--muted); text-align: center; }

input[type="number"] {
  width: 100%; background: var(--bg); border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: 11px 10px; font-size: 16px; text-align: center; outline: none;
}
input[type="number"]:focus { border-color: var(--accent); }

.done-toggle {
  margin-top: 10px; width: 100%; background: var(--bg); border: 1px solid var(--line);
  color: var(--muted); border-radius: 10px; padding: 11px; font-size: 14px; font-weight: 600; cursor: pointer;
}
.done-toggle.on { color: var(--bg); background: var(--accent-2); border-color: var(--accent-2); }

/* ---------- save bar ---------- */
.savebar {
  position: sticky; bottom: 0; display: flex; gap: 10px; padding: 12px 0 4px;
  background: linear-gradient(to top, var(--bg) 70%, transparent);
}
.btn {
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 12px; padding: 13px 16px; font-size: 14px; font-weight: 700; cursor: pointer;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #07101f; flex: 1; }
.btn.ghost { background: transparent; color: var(--muted); }
.btn.danger { background: transparent; color: var(--down); border-color: rgba(251,113,133,.4); width: 100%; }
.btn.file { position: relative; overflow: hidden; display: inline-flex; align-items: center; justify-content: center; }
.btn.file input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* ---------- history ---------- */
.h-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.h-head { display: flex; justify-content: space-between; align-items: center; padding: 11px 14px; border-bottom: 1px solid var(--line); background: var(--card-2); }
.h-date { color: var(--muted); font-size: 13px; }
.h-body { padding: 6px 14px 10px; }
.h-row { display: flex; justify-content: space-between; gap: 10px; padding: 5px 0; font-size: 13.5px; border-bottom: 1px dashed rgba(255,255,255,.04); }
.h-row:last-child { border-bottom: none; }
.h-ex { color: #cdd6e3; }
.h-vals { color: var(--muted); white-space: nowrap; }
.x { background: none; border: none; color: var(--muted); font-size: 15px; cursor: pointer; padding: 4px 6px; }
.x:hover { color: var(--down); }
.empty { color: var(--muted); font-size: 14px; }

/* ---------- data tab ---------- */
.data-actions { display: flex; gap: 10px; }
.data-actions .btn { flex: 1; text-align: center; }
.muted { color: var(--muted); font-size: 13px; margin: 0; }
.weekplan { background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.weekplan-name { font-size: 13px; font-weight: 700; color: var(--accent); margin-bottom: 8px; }
.weekgrid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; }
.weekcell { display: flex; flex-direction: column; gap: 2px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 6px 4px; min-height: 60px; }
.wd { font-size: 10px; color: var(--muted); font-weight: 700; }
.wl { font-size: 10.5px; line-height: 1.2; }
.ws { font-size: 9px; color: var(--muted); }
.danger { margin-top: 12px; }

/* ---------- footer ---------- */
.foot { text-align: center; color: var(--muted); font-size: 11.5px; padding: 18px 16px 28px; }

@media (max-width: 380px) {
  .weekgrid { grid-template-columns: repeat(4, 1fr); }
}