:root {
  --bg: #15171A; --card: #1F2225; --card-border: #2C3034;
  --chalk: #EDEAE2; --dim: #9A9FA6; --dim2: #8A8F94;
  --rust: #C15B32; --steel: #5C8AA6; --ok: #6E9B7C;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--chalk); font-family: -apple-system, "Segoe UI", Roboto, sans-serif; -webkit-text-size-adjust: 100%; }
.wrap { max-width: 720px; margin: 0 auto; padding: 28px 20px 60px; }

/* Masthead */
.masthead { display: flex; justify-content: space-between; align-items: flex-end; border-bottom: 3px solid var(--rust); padding-bottom: 14px; margin-bottom: 22px; }
.masthead h1 { font-family: "Arial Black", Impact, sans-serif; font-size: 28px; letter-spacing: 0.5px; margin: 0; text-transform: uppercase; }
.masthead .sub { color: var(--dim2); font-size: 13px; margin-top: 4px; }
.masthead-right { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.masthead .meta { text-align: right; font-size: 12px; color: var(--dim2); line-height: 1.6; }

/* Profile button */
.profile-btn { background: var(--card); border: 1px solid var(--card-border); color: var(--dim2); font-size: 18px; width: 34px; height: 34px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.profile-btn:hover, .profile-btn.active { border-color: var(--rust); color: var(--chalk); }

/* Video Player */
.video-player { background: var(--card); border: 1px solid var(--card-border); border-radius: 6px; margin-bottom: 16px; overflow: hidden; }
.video-player.hidden { display: none; }
.video-header { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--card-border); }
.video-title { font-size: 13px; font-weight: 600; color: var(--chalk); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.video-close { background: none; border: 1px solid var(--card-border); color: var(--dim2); font-size: 18px; width: 28px; height: 28px; border-radius: 4px; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-left: 8px; }
.video-close:hover { border-color: var(--rust); color: var(--chalk); }
.video-frame-wrap { position: relative; padding-bottom: 56.25%; height: 0; }
.video-frame-wrap iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

/* Tabs */
.tabs { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.tab { flex: 1; min-width: 60px; background: var(--card); border: 1px solid var(--card-border); color: var(--dim2); padding: 10px 6px; text-align: center; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.3px; cursor: pointer; border-radius: 3px; }
.tab:hover { border-color: var(--rust); color: var(--chalk); }
.tab.active { background: var(--rust); border-color: var(--rust); color: #16171A; }
.filter-row { display: flex; gap: 8px; margin-bottom: 16px; }
.chip { padding: 6px 16px; border-radius: 20px; border: 1px solid var(--card-border); background: var(--card); color: var(--dim2); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.4px; cursor: pointer; }
.chip.active { background: var(--steel); border-color: var(--steel); color: #12181A; }
.panel { display: none; }
.panel.active { display: block; }

/* Progress bar */
.barbell-wrap { background: var(--card); border: 1px solid var(--card-border); border-radius: 6px; padding: 14px 16px; margin-bottom: 16px; }
.barbell-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--dim2); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.barbell-label span.count { color: var(--rust); font-weight: 700; }
svg.barbell { width: 100%; height: 40px; display: block; }
.day-title { font-family: "Arial Black", Impact, sans-serif; font-size: 15px; text-transform: uppercase; color: var(--dim2); letter-spacing: 1px; margin: 4px 0 12px 2px; }

/* Exercise cards */
.exercise-card { background: var(--card); border: 1px solid var(--card-border); border-radius: 5px; margin-bottom: 8px; overflow: hidden; }
.exercise-card.done { border-color: var(--ok); }
.exercise-row { display: flex; align-items: center; gap: 10px; padding: 12px 12px; cursor: pointer; }
.exercise-row.done { background: #1D2620; }
.exercise-row.done .ex-name { text-decoration: line-through; color: var(--dim2); }
.checkbox { width: 20px; height: 20px; border: 2px solid var(--dim2); border-radius: 4px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 13px; color: transparent; }
.exercise-row.done .checkbox { background: var(--ok); border-color: var(--ok); color: #15171A; }
.ex-body { flex: 1; min-width: 0; }
.ex-name { font-weight: 600; font-size: 14px; }
.ex-type { display: inline-block; font-size: 9px; padding: 1px 6px; border-radius: 3px; margin-left: 6px; text-transform: uppercase; letter-spacing: 0.3px; vertical-align: middle; }
.ex-type.free { background: #3a2f28; color: #D89A6A; }
.ex-type.machine { background: #223038; color: var(--steel); }
.ex-tag { display: block; font-size: 10px; color: var(--steel); text-transform: uppercase; letter-spacing: 0.4px; margin-top: 2px; }
.ex-scheme { font-size: 13px; color: var(--dim2); font-variant-numeric: tabular-nums; white-space: nowrap; }
.info-toggle { flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--card-border); color: var(--dim2); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; cursor: pointer; }
.info-toggle:hover { border-color: var(--steel); color: var(--chalk); }
.info-toggle.open { background: var(--steel); border-color: var(--steel); color: #15171A; }

/* Detail panel */
.detail-panel { display: none; padding: 4px 14px 16px 14px; border-top: 1px solid var(--card-border); font-size: 13px; color: #C9CDD1; }
.detail-panel.open { display: block; }
.photo-row { display: flex; gap: 8px; margin: 10px 0; flex-wrap: wrap; }
.photo-row img { width: 130px; height: 130px; object-fit: cover; border-radius: 5px; border: 1px solid var(--card-border); background: #0e0f11; }
.photo-cap { font-size: 10px; color: var(--dim2); text-align: center; margin-top: 3px; width: 130px; }
.photo-col { display: flex; flex-direction: column; }
.detail-section { margin-top: 10px; }
.detail-section .label { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--rust); font-weight: 700; margin-bottom: 4px; }
.detail-section ol, .detail-section ul { margin: 0; padding-left: 18px; line-height: 1.6; }
.detail-section li { margin-bottom: 2px; }

/* Machine identification */
.machine-id-section { margin-top: 10px; }
.machine-id-section .label { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--steel); font-weight: 700; margin-bottom: 6px; }
.machine-id-img { width: 150px; height: 150px; object-fit: cover; border-radius: 6px; border: 2px solid var(--steel); background: #0e0f11; }

/* Muscle diagram */
.muscle-section { margin-top: 10px; }
.muscle-section .label { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--rust); font-weight: 700; margin-bottom: 4px; }
.muscle-diagram-wrap { display: flex; gap: 12px; align-items: flex-start; flex-wrap: wrap; }
.muscle-diagram-wrap svg { width: 90px; height: auto; }
.muscle-legend { display: flex; flex-wrap: wrap; gap: 4px 10px; margin-top: 6px; }
.muscle-legend-item { font-size: 10px; color: var(--dim2); display: flex; align-items: center; gap: 4px; }
.muscle-legend-dot { width: 8px; height: 8px; border-radius: 2px; background: var(--rust); flex-shrink: 0; }

/* Buttons */
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.demo-btn { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--chalk); background: var(--rust); text-decoration: none; border: none; padding: 7px 14px; border-radius: 4px; cursor: pointer; font-weight: 600; font-family: inherit; }
.demo-btn:hover { filter: brightness(1.15); }
.link-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.ref-link { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--steel); text-decoration: none; border: 1px solid var(--card-border); padding: 6px 10px; border-radius: 4px; }
.ref-link:hover { border-color: var(--steel); }

/* Save button */
.save-btn { display: block; width: 100%; margin-top: 16px; padding: 12px; background: var(--ok); border: none; border-radius: 5px; color: #15171A; font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; font-family: inherit; }
.save-btn:hover { filter: brightness(1.1); }
.save-btn.saved { background: var(--card); border: 1px solid var(--ok); color: var(--ok); }

/* Save toast */
.save-toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--ok); color: #15171A; padding: 10px 24px; border-radius: 6px; font-size: 13px; font-weight: 600; z-index: 100; opacity: 0; transition: opacity 0.3s; pointer-events: none; }
.save-toast.show { opacity: 1; }

/* Schedule */
.schedule-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; margin-bottom: 20px; }
.sched-day { background: var(--card); border: 1px solid var(--card-border); border-radius: 5px; padding: 10px 4px; text-align: center; font-size: 11px; }
.sched-day .dow { color: var(--dim2); text-transform: uppercase; letter-spacing: 0.5px; font-size: 9px; }
.sched-day .lbl { margin-top: 4px; font-weight: 700; color: var(--chalk); }
.sched-day.rest .lbl { color: var(--dim2); font-weight: 400; }
.notes { background: var(--card); border: 1px solid var(--card-border); border-left: 3px solid var(--steel); border-radius: 4px; padding: 14px 16px; font-size: 13px; color: #C9CDD1; line-height: 1.6; margin-bottom: 12px; }
.notes b { color: var(--chalk); }
.footer-note { text-align: center; font-size: 11px; color: #5c6166; margin-top: 24px; }

/* Profile */
.profile-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 20px; }
.stat-card { background: var(--card); border: 1px solid var(--card-border); border-radius: 6px; padding: 16px; text-align: center; }
.stat-num { font-family: "Arial Black", Impact, sans-serif; font-size: 32px; color: var(--rust); }
.stat-label { font-size: 11px; color: var(--dim2); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 4px; }
.history-day { background: var(--card); border: 1px solid var(--card-border); border-radius: 6px; padding: 14px 16px; margin-bottom: 10px; }
.history-day-title { font-weight: 700; font-size: 14px; margin-bottom: 8px; color: var(--chalk); }
.history-entry { font-size: 12px; color: var(--dim2); padding: 4px 0; border-bottom: 1px solid var(--card-border); display: flex; justify-content: space-between; }
.history-entry:last-child { border-bottom: none; }
.history-entry .he-date { color: var(--chalk); }
.history-entry .he-detail { color: var(--dim2); }
.no-history { color: var(--dim2); font-size: 13px; text-align: center; padding: 20px; }
.clear-data-btn { display: block; width: 100%; margin-top: 16px; padding: 10px; background: transparent; border: 1px solid #6b3030; border-radius: 5px; color: #c45050; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; font-family: inherit; }
.clear-data-btn:hover { background: #2a1515; }

/* ── Responsive ── */
@media (max-width: 600px) {
  .wrap { padding: 16px 12px 40px; }
  .masthead { flex-direction: column; align-items: flex-start; gap: 8px; }
  .masthead h1 { font-size: 22px; }
  .masthead-right { flex-direction: row-reverse; align-items: center; width: 100%; justify-content: space-between; }
  .masthead .meta { text-align: left; font-size: 11px; }
  .tabs { gap: 4px; }
  .tab { min-width: 0; padding: 9px 4px; font-size: 10px; letter-spacing: 0; }
  .filter-row { gap: 6px; }
  .chip { padding: 5px 12px; font-size: 11px; }
  .barbell-wrap { padding: 12px 12px; }
  .exercise-row { gap: 8px; padding: 10px 10px; }
  .ex-name { font-size: 13px; }
  .ex-type { font-size: 8px; padding: 1px 4px; margin-left: 4px; }
  .ex-scheme { font-size: 12px; }
  .detail-panel { padding: 4px 10px 14px 10px; font-size: 12px; }
  .photo-row img { width: 110px; height: 110px; }
  .photo-cap { width: 110px; }
  .machine-id-img { width: 120px; height: 120px; }
  .muscle-diagram-wrap svg { width: 75px; }
  .schedule-grid { grid-template-columns: repeat(4, 1fr); }
  .sched-day { padding: 8px 2px; font-size: 10px; }
  .profile-stats { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-num { font-size: 26px; }
  .day-title { font-size: 13px; }
}

@media (max-width: 380px) {
  .masthead h1 { font-size: 18px; }
  .tab { font-size: 9px; padding: 8px 2px; }
  .ex-name { font-size: 12px; }
  .ex-type { display: none; }
  .photo-row img { width: 90px; height: 90px; }
  .photo-cap { width: 90px; font-size: 9px; }
  .machine-id-img { width: 100px; height: 100px; }
  .schedule-grid { grid-template-columns: repeat(4, 1fr); }
}