:root {
  --bg: #0f1115;
  --panel: #181b22;
  --panel-2: #20242e;
  --line: #2a2f3a;
  --text: #e8eaf0;
  --muted: #98a0b3;
  --accent: #4c8dff;
  --exercise: #1f9d6b;
  --pause: #3b6fb0;
  --danger: #c8506a;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.view { max-width: 760px; margin: 0 auto; padding: 16px; }
.hidden { display: none !important; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 16px;
}
.topbar h1 { font-size: 22px; letter-spacing: 0.5px; }
.topbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Circuit head ---------- */
.circuit-head { margin-bottom: 16px; }
.circuit-name {
  width: 100%; font-size: 18px; font-weight: 600;
  padding: 12px 14px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
}
.circuit-meta { margin-top: 8px; color: var(--muted); font-size: 14px; }

/* ---------- Groups ---------- */
.groups { display: flex; flex-direction: column; gap: 14px; }

.group {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
}
.group-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; background: var(--panel-2);
  border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.group-name {
  flex: 1; min-width: 140px; font-size: 16px; font-weight: 600;
  padding: 8px 10px; border-radius: 8px;
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
}
.repeat {
  display: flex; align-items: center; gap: 6px;
  color: var(--muted); font-size: 14px;
}
.repeat input {
  width: 56px; padding: 6px 8px; border-radius: 8px;
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  text-align: center; font-size: 15px;
}
.group-head-actions { display: flex; gap: 6px; }

.steps { display: flex; flex-direction: column; }

.step {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.step:last-child { border-bottom: none; }
.step[data-type="pause"] { background: rgba(59, 111, 176, 0.10); }

.drag-hint { color: var(--muted); cursor: default; user-select: none; }

.step-type {
  padding: 7px 8px; border-radius: 8px;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
}
.step-name-input {
  flex: 1; min-width: 120px; padding: 8px 10px; border-radius: 8px;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
}
.duration { display: flex; align-items: center; gap: 4px; color: var(--muted); font-size: 13px; }
.duration input {
  width: 52px; padding: 7px 6px; border-radius: 8px; text-align: center;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
}

.step-actions, .group-head-actions { display: flex; gap: 4px; }
.icon {
  width: 34px; height: 34px; border-radius: 8px; cursor: pointer;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  font-size: 15px; line-height: 1; display: grid; place-items: center;
}
.icon:hover { border-color: var(--accent); }
.icon.del:hover { border-color: var(--danger); color: var(--danger); }

/* ---------- Buttons ---------- */
.btn {
  padding: 10px 16px; border-radius: 10px; cursor: pointer; font-size: 15px;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn-secondary { background: transparent; border-style: dashed; width: 100%; }
.btn-ghost { background: transparent; }
.btn:active { transform: translateY(1px); }

select.btn, select { font-size: 15px; }
select#savedSelect {
  padding: 9px 12px; border-radius: 10px; max-width: 220px;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
}

.editor-footer {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line);
}
.editor-footer .spacer { flex: 1; }

/* ---------- Player ---------- */
#player { max-width: none; padding: 0; height: 100dvh; }
.player-stage {
  height: 100dvh; display: flex; flex-direction: column;
  padding: 20px max(20px, env(safe-area-inset-right)) calc(20px + env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  transition: background 0.3s;
}
.player-stage.is-exercise { background: var(--exercise); }
.player-stage.is-pause { background: var(--pause); }
.player-stage.is-prep { background: #6b5b1f; }
.player-stage.is-done { background: #1f2937; }

.player-top { display: flex; align-items: center; justify-content: space-between; }
.badge {
  background: rgba(0,0,0,0.25); padding: 6px 12px; border-radius: 999px;
  font-size: 14px; font-weight: 600;
}
.player-top .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.4); }

.player-center {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; gap: 8px;
}
.step-name { font-size: clamp(28px, 8vw, 56px); font-weight: 700; }
.time { font-size: clamp(72px, 26vw, 200px); font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1; }
.next { font-size: clamp(15px, 4vw, 22px); opacity: 0.85; }

.progress { height: 8px; background: rgba(0,0,0,0.25); border-radius: 999px; overflow: hidden; }
.progress-bar { height: 100%; width: 0%; background: #fff; transition: width 0.25s linear; }

.player-controls {
  display: flex; align-items: center; justify-content: center;
  gap: 22px; padding-top: 22px;
}
.btn-round {
  width: 64px; height: 64px; border-radius: 50%; font-size: 24px;
  display: grid; place-items: center; color: #fff;
  background: rgba(0,0,0,0.22); border: 1px solid rgba(255,255,255,0.35);
}
.btn-round.btn-primary { width: 78px; height: 78px; background: #fff; color: #111; border-color: #fff; }

@media (max-width: 560px) {
  .topbar-actions { width: 100%; }
  select#savedSelect { flex: 1; max-width: none; }
  .duration span { display: none; }
}