/* FitTrack — calm, flat, mobile-first. Light & dark from the same tokens. */
:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --inset: #f1f0ec;
  --line: rgba(20, 22, 30, 0.08);
  --line-strong: rgba(20, 22, 30, 0.14);
  --text: #1c1d21;
  --muted: #6b6e76;
  --faint: #9a9ca3;
  --accent: #4f5fd6;
  --accent-ink: #ffffff;
  --accent-soft: rgba(79, 95, 214, 0.10);
  --danger: #c8443b;
  --danger-soft: rgba(200, 68, 59, 0.09);
  --r-lg: 18px;
  --r-md: 12px;
  --r-sm: 10px;
  --ease: cubic-bezier(0.25, 0.9, 0.3, 1);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --surface: #18191c;
    --inset: #202125;
    --line: rgba(255, 255, 255, 0.07);
    --line-strong: rgba(255, 255, 255, 0.13);
    --text: #ececef;
    --muted: #9b9ea6;
    --faint: #686b73;
    --accent: #7b89f0;
    --accent-ink: #0f1020;
    --accent-soft: rgba(123, 137, 240, 0.14);
    --danger: #ff6b61;
    --danger-soft: rgba(255, 107, 97, 0.12);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; color: inherit; }

/* ---------- header ---------- */
.app-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--bg);
  padding: calc(env(safe-area-inset-top, 0px) + 18px) 20px 10px;
  max-width: 560px; margin: 0 auto;
}
.app-header h1 { margin: 0; font-size: 30px; font-weight: 700; letter-spacing: -0.025em; }
.app-header .sub { margin: 0; font-size: 14px; color: var(--muted); }

main {
  padding: 6px 16px calc(env(safe-area-inset-bottom, 0px) + 96px);
  max-width: 560px; margin: 0 auto;
}
.screen { display: none; }
.screen.active { display: block; animation: screenIn 0.25s var(--ease); }
@keyframes screenIn { from { opacity: 0; transform: translateY(6px); } }

/* ---------- tab bar ---------- */
.tabbar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 30;
  display: flex; justify-content: center;
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 6px 8px calc(env(safe-area-inset-bottom, 0px) + 6px);
}
.tab {
  flex: 1; max-width: 140px; min-height: 52px;
  background: none; border: none; color: var(--faint);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  font-size: 11px; font-weight: 600; cursor: pointer;
  transition: color 0.2s var(--ease);
}
.tab .icon-wrap { display: flex; }
.tab svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.tab.active { color: var(--accent); }

/* ---------- cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px;
  margin-bottom: 12px;
}
.card.notice { border-color: var(--accent); background: linear-gradient(var(--accent-soft), var(--accent-soft)), var(--surface); }
.card.notice h2 { color: var(--text); }
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin-bottom: 12px; }
.card-head h2, .card-head h3 { margin: 0; }
.card h2 { margin: 0 0 12px; font-size: 15px; font-weight: 600; color: var(--muted); letter-spacing: -0.005em; }
.card h3 { margin: 0 0 10px; font-size: 19px; font-weight: 650; letter-spacing: -0.015em; }
.card p { margin: 6px 0; }
.sub-h { font-size: 14px !important; font-weight: 600 !important; color: var(--muted); margin: 18px 0 4px !important; }
.lead { font-size: 20px; font-weight: 650; letter-spacing: -0.015em; margin: 2px 0 !important; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 48px; padding: 0 18px; border-radius: var(--r-md);
  border: 1px solid var(--line-strong); background: transparent;
  font-size: 16px; font-weight: 600; cursor: pointer;
  transition: transform 0.12s var(--ease), opacity 0.12s, background 0.15s;
}
.btn:active { transform: scale(0.98); opacity: 0.8; }
.btn.primary { background: var(--accent); border-color: transparent; color: var(--accent-ink); }
.btn.ghost { background: transparent; }
.btn.danger { background: var(--danger); border-color: transparent; color: #fff; }
.btn.danger-ghost { background: var(--danger-soft); border-color: transparent; color: var(--danger); }
.btn.small { min-height: 38px; padding: 0 14px; font-size: 14px; border-radius: var(--r-sm); }
.btn.block { width: 100%; margin-top: 12px; }
.row { display: flex; gap: 10px; margin-top: 12px; }
.row .btn { flex: 1; margin-top: 0; }
.link {
  background: none; border: none; padding: 4px 0; cursor: pointer;
  color: var(--accent); font-size: 14px; font-weight: 600;
}
.link.danger { color: var(--danger); }
.block-link { display: block; width: 100%; text-align: center; padding: 12px 0 2px; }
.icon-btn {
  min-height: 40px; min-width: 40px; background: transparent;
  border: none; border-radius: var(--r-sm); color: var(--faint);
  font-size: 20px; line-height: 1; cursor: pointer;
}
.icon-btn:active { background: var(--inset); }

/* ---------- forms ---------- */
label { display: block; font-size: 13px; color: var(--muted); font-weight: 500; margin-bottom: 12px; }
input[type="text"], input[type="date"], input[type="number"], select, textarea {
  width: 100%; margin-top: 5px; min-height: 48px; padding: 10px 13px;
  background: var(--inset);
  border: 1px solid transparent; border-radius: var(--r-sm);
  color: var(--text); font-size: 16px; font-family: inherit;
  -webkit-appearance: none; appearance: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
select {
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 21px, calc(100% - 13px) 21px;
  background-size: 5px 5px; background-repeat: no-repeat; padding-right: 34px;
  font-weight: 600;
}
input[type="date"] { min-width: 0; }
input[type="checkbox"] { accent-color: var(--accent); width: 20px; height: 20px; }
textarea { min-height: 80px; resize: vertical; line-height: 1.5; margin-top: 0; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
::placeholder { color: var(--faint); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 10px; }
.note-label { margin: 12px 0 0; }

.quicklog { display: flex; gap: 10px; }
.quicklog input { flex: 1; min-width: 0; margin-top: 0; font-size: 18px; font-weight: 600; text-align: center; font-variant-numeric: tabular-nums; }
.quicklog .btn { flex: 0 0 auto; min-width: 88px; }
.addrow { display: grid; grid-template-columns: 1.3fr 1fr auto; gap: 8px; margin: 12px 0 4px; }
.addrow input { margin-top: 0; }

/* ---------- stats ---------- */
.stats { display: flex; gap: 22px; flex-wrap: wrap; margin: 14px 0 4px; }
.stats .l { font-size: 12.5px; color: var(--muted); }
.stats .v { font-size: 16px; font-weight: 650; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }

/* ---------- segmented control ---------- */
.seg { display: inline-flex; background: var(--inset); border-radius: 9px; padding: 2px; gap: 2px; flex-shrink: 0; }
.seg button {
  border: none; background: transparent; color: var(--muted);
  font-size: 12.5px; font-weight: 600; padding: 6px 10px; border-radius: 7px; cursor: pointer;
  min-height: 30px;
}
.seg button.on { background: var(--surface); color: var(--text); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08); }
.seg-wide { display: flex; margin: 12px 0 4px; }
.seg-wide button { flex: 1; }

/* ---------- interactive chart ---------- */
.chart-host { margin-top: 14px; color: var(--accent); }
.chart-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 8px 10px; margin-bottom: 6px; }
.ro-sub span { white-space: nowrap; }
.readout { min-width: 0; }
.ro-value { font-size: 34px; font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; color: var(--text); font-variant-numeric: tabular-nums; }
.ro-value small { font-size: 15px; font-weight: 600; color: var(--muted); margin-left: 4px; letter-spacing: 0; }
.ro-sub { font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0 8px; margin-top: 2px; }
.ro-delta { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }
.chart { width: 100%; height: auto; display: block; overflow: visible; touch-action: pan-y; cursor: crosshair; outline: none; -webkit-user-select: none; user-select: none; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .ax { fill: var(--faint); font-size: 10px; font-family: inherit; font-variant-numeric: tabular-nums; }
.chart .goal { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 4 4; opacity: 0.7; }
.chart .goal-t { fill: var(--muted); font-weight: 600; }
.chart .line { stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.chart .pt { fill: currentColor; opacity: 0.55; }
.chart .xhair { stroke: var(--muted); stroke-width: 1; opacity: 0; transition: opacity 0.15s; }
.chart .focus { fill: currentColor; stroke: var(--surface); stroke-width: 2; }
.chart .focus-halo { fill: currentColor; opacity: 0.16; }
.chart .hit { fill: transparent; }
.scrubbing .chart .xhair { opacity: 0.5; }
.chart:focus-visible { box-shadow: 0 0 0 2px var(--accent-soft); border-radius: 8px; }

/* ---------- lists ---------- */
.list { list-style: none; margin: 8px 0 0; padding: 0; }
.list li { padding: 11px 0; border-top: 1px solid var(--line); }
.list li:first-child { border-top: none; }
.li-main { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; font-size: 15px; font-weight: 600; }
.li-main .muted { font-weight: 500; font-size: 13px; }
.li-sub { font-size: 14px; color: var(--muted); margin-top: 2px; font-variant-numeric: tabular-nums; }
.li-note { font-size: 14px; color: var(--muted); margin-top: 4px; white-space: pre-wrap; overflow-wrap: break-word; }
.li-row { display: grid; grid-template-columns: 1fr auto 40px; align-items: center; gap: 8px; padding: 4px 0 !important; font-size: 15px; }
.li-val { font-weight: 600; font-variant-numeric: tabular-nums; }

details.fold { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 4px; }
details.fold summary {
  list-style: none; cursor: pointer; padding: 10px 0 4px;
  font-size: 14px; font-weight: 600; color: var(--muted);
  display: flex; justify-content: space-between;
}
details.fold summary::-webkit-details-marker { display: none; }
details.fold summary::after { content: '›'; transform: rotate(90deg); transition: transform 0.2s; font-size: 18px; line-height: 1; }
details.fold[open] summary::after { transform: rotate(-90deg); }

/* ---------- empty states ---------- */
.empty { text-align: center; color: var(--muted); padding: 28px 16px; font-size: 15px; line-height: 1.55; }
.empty.small { padding: 22px 8px; font-size: 14px; }
.empty b { color: var(--text); }
.empty-icon { display: none; }

/* ---------- workouts ---------- */
.day-card .ex-preview { margin: 0 -6px; }
.ex-line {
  display: flex; justify-content: space-between; gap: 10px; width: 100%;
  background: none; border: none; text-align: left; cursor: pointer;
  padding: 7px 6px; border-radius: 8px; font-size: 15px;
}
.ex-line:active { background: var(--inset); }
.ss-group { margin: 8px 0; padding: 6px 0 4px 10px; border-left: 2px solid var(--accent); }
.ss-group .ex-line { padding-left: 4px; }
.ss-label { font-size: 11.5px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.06em; padding: 0 4px; }
.ss-block { border: 1px solid var(--accent); border-radius: calc(var(--r-lg) + 6px); padding: 6px; margin-bottom: 12px; background: var(--accent-soft); }
.ss-block .card { margin-bottom: 6px; }
.ss-block .card:last-child { margin-bottom: 0; }
.ss-banner { padding: 10px 12px 12px; }
.ss-title { font-size: 12px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.06em; }
.ss-how { font-size: 14px; margin-top: 2px; }
.ss-pos { display: inline-block; min-width: 26px; margin-right: 8px; padding: 1px 6px; border-radius: 6px; background: var(--accent); color: var(--accent-ink); font-size: 12px; font-weight: 700; text-align: center; vertical-align: 2px; }
.ss-step { font-size: 13px; font-weight: 600; color: var(--accent); margin-top: 6px; }
.ss-tag { font-size: 11.5px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; margin: 6px 0 6px; }
.edit-ex-row.in-ss { border-left: 2px solid var(--accent); padding-left: 8px; }
.edit-ex-row input:disabled { opacity: 0.5; }
.ex-line .rx { color: var(--faint); font-variant-numeric: tabular-nums; white-space: nowrap; font-size: 14px; }
.screen-subhead { display: flex; justify-content: space-between; align-items: center; margin: 2px 2px 12px; }
.screen-subhead h3 { margin: 0; font-size: 20px; font-weight: 650; letter-spacing: -0.015em; }
.ex-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.ex-head h4 { margin: 0; font-size: 17px; font-weight: 650; letter-spacing: -0.01em; }
.presc { font-size: 12.5px; font-weight: 600; color: var(--muted); white-space: nowrap; background: var(--inset); padding: 3px 9px; border-radius: 999px; }
.last-line { font-size: 13.5px; color: var(--accent); margin: 6px 0 10px; font-variant-numeric: tabular-nums; }
.last-line.none { color: var(--faint); }
.set-row { display: grid; grid-template-columns: 30px 1fr 1fr 40px; gap: 8px; align-items: center; margin-bottom: 8px; }
.set-row .set-num { color: var(--faint); font-weight: 600; text-align: center; font-size: 14px; }
.set-row.filled .set-num { color: var(--accent); }
.set-row input { margin-top: 0; text-align: center; font-weight: 600; font-variant-numeric: tabular-nums; }
.entry-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 8px; }
.entry-head strong { font-size: 15px; font-weight: 650; }
.entry-actions { display: flex; gap: 8px; flex-shrink: 0; }
.entry-note { margin-top: 8px; font-size: 14px; color: var(--muted); white-space: pre-wrap; overflow-wrap: break-word; }
.hist-line { margin-top: 4px; }
.edit-ex-row, .edit-ex-head { display: grid; grid-template-columns: 1fr 1.6fr 1fr 30px 40px; gap: 6px; align-items: center; }
.edit-ex-row > :first-child, .edit-ex-head > :first-child { grid-column: 1 / -1; }
.edit-ex-row input { max-width: none !important; }
.edit-ex-row > div input { flex: 1; min-width: 0; }
.edit-ex-row { margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.edit-ex-row input { margin-top: 0; padding: 10px 6px; min-height: 44px; }
.edit-ex-row input[inputmode="numeric"] { text-align: center; }
.edit-ex-head { font-size: 10.5px; font-weight: 600; color: var(--faint); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 5px; }

/* ---------- photos ---------- */
.photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 8px; }
.photo-item { position: relative; }
.photo-item img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; border-radius: var(--r-sm); display: block; }
.photo-item .tag { position: absolute; left: 6px; top: 6px; background: rgba(0, 0, 0, 0.55); color: #fff; padding: 2px 8px; border-radius: 6px; font-size: 11px; font-weight: 600; }
.photo-item .del { position: absolute; right: 4px; bottom: 4px; background: rgba(0, 0, 0, 0.55); color: #fff; min-height: 32px; min-width: 32px; }
.photo-date { margin: 16px 0 2px; font-size: 14px; font-weight: 600; }
.photo-open { display: block; width: 100%; padding: 0; border: none; background: none; cursor: zoom-in; border-radius: var(--r-sm); }

/* ---------- photo viewer (full screen; sits under the confirm modal so "Delete?" shows on top) ---------- */
body.no-scroll { overflow: hidden; }
.viewer {
  position: fixed; inset: 0; z-index: 90;
  background: #000; color: #fff;
  display: flex; flex-direction: column;
  padding: env(safe-area-inset-top, 0px) 0 env(safe-area-inset-bottom, 0px);
  overscroll-behavior: contain;
  animation: fadeIn 0.18s ease;
}
.viewer[hidden] { display: none; } /* display:flex above would otherwise beat the hidden attribute */
.viewer-top, .viewer-bottom { display: flex; align-items: center; gap: 8px; padding: 10px 12px; }
.viewer-top { justify-content: space-between; }
.viewer-bottom { justify-content: space-between; }
.viewer-title { font-size: 16px; font-weight: 650; }
.viewer-count { font-size: 13px; color: rgba(255, 255, 255, 0.6); font-variant-numeric: tabular-nums; }
.viewer-stage { flex: 1; min-height: 0; display: flex; align-items: center; justify-content: center; padding: 0 8px; }
.viewer-stage img { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: var(--r-sm); }
.viewer-missing { color: rgba(255, 255, 255, 0.6); }
.viewer-btn {
  min-height: 44px; min-width: 44px; padding: 0 14px;
  background: rgba(255, 255, 255, 0.12); color: #fff;
  border: none; border-radius: var(--r-md);
  font-size: 15px; font-weight: 600; cursor: pointer;
}
.viewer-top .viewer-btn { font-size: 24px; line-height: 1; padding: 0; }
.viewer-btn:disabled { opacity: 0.3; cursor: default; }
.viewer-btn.danger { color: #ff8a82; }
.viewer-angles { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px; padding: 10px 12px 0; }
.viewer-angle {
  min-height: 36px; padding: 0 16px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.12); color: #fff; border: none;
  font-size: 14px; font-weight: 600; cursor: pointer;
}
.viewer-angle.on { background: #fff; color: #000; }

/* ---------- modal (bottom sheet on phones) ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4); z-index: 100;
  display: flex; align-items: flex-end; justify-content: center;
  animation: fadeIn 0.18s ease;
}
.modal {
  background: var(--surface);
  border-radius: 22px 22px 0 0;
  padding: 22px 18px calc(env(safe-area-inset-bottom, 0px) + 18px);
  width: 100%; max-width: 560px; max-height: 88vh; overflow-y: auto;
  animation: sheetIn 0.26s var(--ease);
}
@media (min-width: 640px) {
  .modal-backdrop { align-items: center; padding: 20px; }
  .modal { border-radius: 22px; }
}
@keyframes fadeIn { from { opacity: 0; } }
@keyframes sheetIn { from { transform: translateY(24px); opacity: 0; } }
.modal h3 { margin: 0 0 8px; font-size: 20px; font-weight: 650; letter-spacing: -0.015em; }
.modal .mt0 { margin-top: 0; }
.modal-actions { display: flex; gap: 10px; margin-top: 18px; }
.modal-actions .btn { flex: 1; }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 84px);
  background: var(--text); color: var(--bg);
  padding: 10px 18px; border-radius: 999px; z-index: 200;
  font-size: 14px; font-weight: 600; white-space: nowrap;
  opacity: 0; transform: translateX(-50%) translateY(8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- misc ---------- */
.muted { color: var(--muted); }
.small, .small-text { font-size: 13.5px; }
.center { text-align: center; }
.mt0 { margin-top: 0; }
hr.sep { border: none; border-top: 1px solid var(--line); margin: 14px 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}