:root {
  --bg: #ececee;
  --bg-tint: #e6e6ea;
  --surface: #ffffff;
  --surface-soft: #f5f5f7;
  --surface-hover: #f0f0f2;
  --surface-sunk: #eaeaee;
  --border: #d5d5d9;
  --border-soft: #e3e3e6;
  --border-strong: #b4b4ba;
  --separator: rgba(60, 60, 67, 0.12);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
  --text: #1d1d1f;
  --text-mute: #6e6e73;
  --text-soft: #86868b;
  --accent: #007aff;
  --accent-hover: #0060df;
  --accent-soft: #e8f2ff;
  --accent-border: #b3d4ff;
  --good: #248a3d; --good-soft: #e6f4ea; --good-border: #b7dcc0;
  --warn: #b25000; --warn-soft: #fff4e5; --warn-border: #ffd9a8;
  --danger: #d70015; --danger-soft: #fdeaec; --danger-border: #f5c2c7;
  --radius: 7px;
  --radius-lg: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Inter", "Segoe UI", Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 13.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
button { font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: 14px; }

/* topbar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: linear-gradient(180deg, #f7f7f9, #efeff2);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--separator);
  padding: 12px 16px 10px;
  display: flex; align-items: center; gap: 10px;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-icon {
  width: 30px; height: 30px;
  background: linear-gradient(135deg, #007aff 0%, #5ac8fa 100%);
  color: #fff; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 122, 255, 0.28), inset 0 1px 0 rgba(255,255,255,0.4);
  flex-shrink: 0;
}
.brand-icon svg { width: 15px; height: 15px; }
.brand-title { font-size: 16px; font-weight: 600; letter-spacing: -0.022em; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.person-chips {
  display: flex; gap: 6px; align-items: center;
  overflow-x: auto; max-width: 100%;
  scrollbar-width: none;
}
.person-chips::-webkit-scrollbar { display: none; }
.person-chip {
  display: inline-flex; align-items: center; gap: 5px;
  height: 30px; padding: 0 11px;
  border-radius: 15px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text-mute);
  font-size: 12.5px; font-weight: 500;
  cursor: pointer; white-space: nowrap;
  box-shadow: 0 0.5px 1px rgba(0,0,0,0.04);
  transition: background .18s ease-out, color .18s ease-out, border-color .18s ease-out, transform 90ms cubic-bezier(0.22, 1, 0.36, 1);
}
.person-chip:active { transform: scale(0.97); }
.person-chip[data-active="true"] {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.person-chip .chip-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--border-strong);
}
.person-chip[data-active="true"] .chip-dot { background: #fff; }

.icon-btn {
  height: 30px; width: 30px;
  border: 1px solid var(--border); border-radius: 7px;
  background: var(--surface); color: var(--text);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: 0 0.5px 1px rgba(0,0,0,0.04);
  transition: background .12s ease, border-color .12s ease, transform 90ms cubic-bezier(0.22, 1, 0.36, 1);
}
.icon-btn:hover { background: var(--surface-hover); border-color: var(--border-strong); }
.icon-btn:active { transform: scale(0.97); }
.icon-btn svg { width: 15px; height: 15px; }

/* layout */
.wrap { max-width: 720px; margin: 0 auto; padding: 20px 16px 96px; }

/* breadcrumb / back */
.back {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 10px 6px 8px;
  border: 1px solid var(--border-soft); border-radius: 7px;
  background: var(--surface);
  color: var(--text-mute); font-size: 12.5px; font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  margin-bottom: 14px;
}
.back:hover { background: var(--surface-hover); color: var(--text); }
.back svg { width: 12px; height: 12px; }

.page-title { font-size: 22px; font-weight: 600; letter-spacing: -0.022em; margin: 0 0 4px; }
.page-sub { font-size: 13px; color: var(--text-mute); margin: 0 0 20px; }

/* muscle-group grid */
.mg-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
}
@media (min-width: 500px) { .mg-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 720px) { .mg-grid { grid-template-columns: repeat(4, 1fr); } }
.mg-tile {
  padding: 20px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--surface); box-shadow: var(--shadow-card);
  color: inherit; text-align: left;
  cursor: pointer;
  display: flex; flex-direction: column; gap: 6px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  min-height: 92px;
}
.mg-tile:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.mg-tile-name { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.mg-tile-count { font-size: 12px; color: var(--text-mute); }
.mg-tile-day { font-size: 10.5px; color: var(--text-soft); text-transform: uppercase; letter-spacing: 0.04em; margin-top: auto; }

/* rotation banner */
.rotation {
  margin: 6px 0 20px; padding: 12px 14px;
  border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  background: var(--surface-soft);
  font-size: 12px; color: var(--text-mute); line-height: 1.55;
}
.rotation strong { color: var(--text); font-weight: 600; }

/* machines list */
.machine-list { display: flex; flex-direction: column; gap: 8px; }
.machine-row {
  display: flex; align-items: center; gap: 12px;
  padding: 10px; border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--surface); box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background .12s ease, border-color .12s ease;
}
.machine-row:hover { background: var(--surface-hover); border-color: var(--border-strong); }
.machine-thumb {
  width: 56px; height: 56px; border-radius: 8px;
  background: var(--surface-sunk); overflow: hidden; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft);
}
.machine-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.machine-body { min-width: 0; flex: 1; }
.machine-name { font-size: 14.5px; font-weight: 600; letter-spacing: -0.005em; }
.machine-last { font-size: 12px; color: var(--text-mute); margin-top: 2px; }

/* machine detail screen */
.machine-detail-head {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 18px;
}
.detail-thumb {
  width: 72px; height: 72px; border-radius: 10px;
  background: var(--surface-sunk); overflow: hidden; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft);
  border: 1px solid var(--border-soft);
}
.detail-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.detail-titles { flex: 1; min-width: 0; }
.detail-titles .page-title { margin-bottom: 0; }
.detail-titles .page-sub { margin: 2px 0 0; }

.panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: 16px; margin-bottom: 14px;
}
.panel-title {
  font-size: 11px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--text-soft); margin: 0 0 10px;
}

.mode-row { display: flex; gap: 6px; }
.mode-pill {
  flex: 1;
  padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 8px; background: var(--surface); color: var(--text);
  font-size: 12.5px; font-weight: 500; cursor: pointer;
  transition: background .18s ease-out, border-color .18s ease-out, color .18s ease-out;
}
.mode-pill:active { transform: scale(0.97); }
.mode-pill[data-active="true"] {
  background: var(--accent-soft); border-color: var(--accent-border); color: var(--accent);
}

.rec-weight { font-size: 46px; font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.rec-weight small { font-size: 15px; font-weight: 500; color: var(--text-mute); margin-left: 6px; letter-spacing: 0; }
.rec-reps { font-size: 14px; color: var(--text-mute); margin-top: 6px; }
.rec-explain { font-size: 12.5px; color: var(--text-mute); margin-top: 10px; line-height: 1.55; }
.rec-explain strong { color: var(--text); font-weight: 600; }

.pct-badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 600; letter-spacing: 0;
  background: var(--good-soft); color: var(--good); border: 1px solid var(--good-border);
  margin-left: 8px; vertical-align: middle;
}
.pct-badge[data-neg="true"] { background: var(--warn-soft); color: var(--warn); border-color: var(--warn-border); }
.pct-badge[data-flat="true"] { background: var(--surface-soft); color: var(--text-mute); border-color: var(--border); }

/* set logger */
.set-row {
  display: grid; grid-template-columns: 42px 1fr 1fr 32px;
  gap: 8px; align-items: center; margin-bottom: 8px;
}
.set-label { font-size: 12px; color: var(--text-soft); text-align: right; padding-right: 4px; }
.set-input {
  height: 40px; padding: 0 10px;
  border: 1px solid var(--border); border-radius: 7px;
  background: var(--surface); color: var(--text);
  font-size: 15px;
  width: 100%;
}
.set-input:focus { outline: none; box-shadow: 0 0 0 3px rgba(0,122,255,0.18); border-color: var(--accent); }
.set-suffix { font-size: 11px; color: var(--text-soft); margin-top: 2px; }

.form-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.form-row label { font-size: 11.5px; font-weight: 600; color: var(--text-soft); letter-spacing: 0.02em; text-transform: uppercase; }
.form-input, .form-select {
  height: 38px; padding: 0 10px;
  border: 1px solid var(--border); border-radius: 7px;
  background: var(--surface); color: var(--text);
  font-size: 14.5px;
}
.form-input:focus, .form-select:focus { outline: none; box-shadow: 0 0 0 3px rgba(0,122,255,0.18); border-color: var(--accent); }
textarea.form-input { height: auto; min-height: 60px; padding: 8px 10px; resize: vertical; }

/* buttons */
.btn {
  height: 40px; padding: 0 16px;
  border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: #fff;
  font-size: 14px; font-weight: 500; letter-spacing: -0.005em;
  cursor: pointer;
  box-shadow: inset 0 0.5px 0 rgba(255,255,255,0.15);
  transition: background .12s ease, transform 90ms cubic-bezier(0.22, 1, 0.36, 1);
}
.btn:hover { background: var(--accent-hover); }
.btn:active { transform: scale(0.98); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn.ghost {
  background: var(--surface); color: var(--text); border-color: var(--border);
  box-shadow: 0 0.5px 1px rgba(0,0,0,0.04);
}
.btn.ghost:hover { background: var(--surface-hover); border-color: var(--border-strong); }
.btn.danger { background: var(--danger); border-color: var(--danger); }
.btn.danger:hover { background: #b70012; }
.btn.small { height: 32px; padding: 0 12px; font-size: 12.5px; }

.btn-row { display: flex; gap: 8px; margin-top: 4px; }

/* history */
.history-row {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 10px 0; border-bottom: 1px solid var(--separator);
}
.history-row:last-child { border-bottom: none; }
.history-date { font-size: 12.5px; color: var(--text-mute); min-width: 70px; }
.history-sets { font-size: 13.5px; color: var(--text); text-align: right; }
.history-set-line { display: block; }
.history-note { font-size: 11.5px; color: var(--text-soft); margin-top: 3px; font-style: italic; }

/* empty state */
.empty {
  text-align: center; padding: 40px 20px;
  color: var(--text-mute);
}
.empty h3 { margin: 0 0 6px; color: var(--text); font-weight: 600; font-size: 16px; }
.empty p { margin: 0 0 16px; font-size: 13px; }

/* floating add button */
.fab {
  position: fixed; right: 20px; bottom: 20px;
  height: 52px; padding: 0 18px 0 14px;
  border-radius: 26px; border: none;
  background: var(--accent); color: #fff;
  font-size: 14.5px; font-weight: 600;
  display: flex; align-items: center; gap: 6px;
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.35);
  cursor: pointer;
  z-index: 30;
  transition: transform 90ms cubic-bezier(0.22, 1, 0.36, 1), background .12s ease;
}
.fab:hover { background: var(--accent-hover); }
.fab:active { transform: scale(0.97); }
.fab svg { width: 16px; height: 16px; }

/* modal */
.modal-back {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(4px);
  display: none;
  align-items: flex-end; justify-content: center;
}
.modal-back.open { display: flex; }
@media (min-width: 640px) { .modal-back.open { align-items: center; } }
.modal {
  width: 100%; max-width: 480px;
  background: var(--surface); color: var(--text);
  border-radius: 16px 16px 0 0;
  padding: 20px 20px 24px;
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.18);
  max-height: 90vh; overflow-y: auto;
}
@media (min-width: 640px) { .modal { border-radius: 16px; } }
.modal h2 { margin: 0 0 14px; font-size: 18px; font-weight: 600; letter-spacing: -0.02em; }

.photo-picker {
  display: block;
  width: 100%;
  box-sizing: border-box;
  border: 1.5px dashed var(--border-strong); border-radius: var(--radius-lg);
  background: var(--surface-sunk);
  padding: 20px; text-align: center;
  color: var(--text-mute); font-size: 13px;
  cursor: pointer;
  margin-bottom: 12px;
  overflow: hidden;
  position: relative;
  min-height: 92px;
}
.photo-picker img { max-width: 100%; max-height: 280px; border-radius: 8px; display: block; margin: 0 auto; }
.photo-picker input { display: none; }
.photo-picker:hover { background: var(--surface-hover); }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 90px; transform: translateX(-50%);
  background: rgba(29, 29, 31, 0.94); color: #fff;
  padding: 10px 16px; border-radius: 10px;
  font-size: 13px; z-index: 200;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  opacity: 0; pointer-events: none;
  transition: opacity .18s ease-out;
}
.toast.show { opacity: 1; }

/* compare mode: per-person column */
.compare-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 720px) { .compare-grid.cols-2 { grid-template-columns: 1fr 1fr; } .compare-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; } }

.person-col-head {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 10px;
}
.person-col-head .name { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.person-col-head .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

.machine-last-multi { font-size: 12px; color: var(--text-mute); margin-top: 2px; line-height: 1.5; }
.machine-last-multi .who { color: var(--text); font-weight: 600; }

.people-manage-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--border-soft); border-radius: 7px;
  background: var(--surface);
  color: var(--text-mute); font-size: 12px; font-weight: 500;
  cursor: pointer;
}
.people-manage-btn:hover { background: var(--surface-hover); color: var(--text); }
.person-manage-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 0; border-bottom: 1px solid var(--separator);
}
.person-manage-row:last-child { border-bottom: none; }
.person-manage-row .name { flex: 1; font-size: 14px; }

/* misc */
.hidden { display: none !important; }
.spacer { height: 24px; }
.row-space { display: flex; justify-content: space-between; align-items: center; }
.row-space + .row-space { margin-top: 6px; }
.link { color: var(--accent); text-decoration: none; font-weight: 500; }
.link:hover { text-decoration: underline; }