/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%;overscroll-behavior-y:none}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Segoe UI",Roboto,Ubuntu,sans-serif;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
  font-feature-settings:"cv02","cv03","cv04","cv11";
}
input,select,textarea{font-size:16px;font-family:inherit}
button,input,select,textarea{font-family:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer;color:inherit;font-family:inherit}
a{color:inherit;text-decoration:none}
input,textarea,select{outline:none}
input[type=number]{-moz-appearance:textfield}
input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
::selection{background:color-mix(in oklab,var(--brand) 25%,transparent)}

/* ===== Theme (LIGHT by default) ===== */
:root{
  --bg:#f7f8fa;
  --bg-2:#ffffff;
  --bg-3:#f1f3f7;
  --line:#e6e8ee;
  --line-2:#eef0f4;
  --text:#0f172a;
  --text-2:#334155;
  --muted:#64748b;
  --muted-2:#94a3b8;
  --brand:#16a34a;
  --brand-2:#22c55e;
  --brand-soft:#dcfce7;
  --ok:#10b981;
  --ok-soft:#e6f7f0;
  --warn:#f59e0b;
  --warn-soft:#fff5e0;
  --err:#ef4444;
  --err-soft:#fdecec;
  --radius:16px;
  --radius-sm:12px;
  --radius-xs:10px;
  --shadow-1:0 1px 2px rgba(15,23,42,.04),0 1px 3px rgba(15,23,42,.03);
  --shadow-2:0 4px 12px rgba(15,23,42,.06),0 2px 4px rgba(15,23,42,.03);
  --shadow-3:0 12px 32px rgba(15,23,42,.08);
  --safe-bottom:env(safe-area-inset-bottom,0px);
  --safe-top:env(safe-area-inset-top,0px);
  --nav-h:68px;
}
:root:not([data-theme="light"]){
  /* system dark fallback (only applies when user has no explicit choice) */
  @media (prefers-color-scheme:dark){
    /* Placeholder — dark is opt-in via data-theme=dark below */
  }
}
:root[data-theme="dark"]{
  --bg:#0b0d12;
  --bg-2:#141821;
  --bg-3:#1c2130;
  --line:#242a38;
  --line-2:#1e2432;
  --text:#e9ecf1;
  --text-2:#c7cdd9;
  --muted:#8b93a7;
  --muted-2:#6b7488;
  --brand:#22c55e;
  --brand-2:#4ade80;
  --brand-soft:#0d2818;
  --ok:#3ecf8e;
  --ok-soft:#0e2a20;
  --warn:#f2c94c;
  --warn-soft:#2b220f;
  --err:#ff5964;
  --err-soft:#2b1418;
  --shadow-1:0 1px 2px rgba(0,0,0,.35);
  --shadow-2:0 6px 24px rgba(0,0,0,.4);
  --shadow-3:0 16px 40px rgba(0,0,0,.5);
}

/* ===== Layout ===== */
#app{min-height:100dvh;display:flex;flex-direction:column;padding-bottom:calc(var(--nav-h) + var(--safe-bottom));padding-top:var(--safe-top)}
.page{padding:18px 16px 24px;max-width:820px;margin:0 auto;width:100%}
@supports(padding:max(0px)){
  .page{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
}
.page-title{font-size:26px;font-weight:700;margin:0 0 14px;letter-spacing:-0.02em}
.header{display:flex;align-items:center;gap:10px;margin-bottom:14px;min-height:36px}
.header h1{font-size:24px;margin:0;font-weight:700;letter-spacing:-0.02em}
.header .subtle{color:var(--muted);font-size:13px}

/* ===== Bottom nav ===== */
.bottom-nav{
  position:fixed;left:0;right:0;bottom:0;
  background:color-mix(in oklab,var(--bg-2) 90%,transparent);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-top:1px solid var(--line);
  display:grid;grid-template-columns:repeat(5,1fr);
  padding-bottom:var(--safe-bottom);
  z-index:20;
}
.bottom-nav button{
  padding:10px 4px 8px;color:var(--muted-2);
  display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:10.5px;font-weight:600;letter-spacing:-.01em;
  transition:color .15s ease;
}
.bottom-nav button.active{color:var(--brand)}
.bottom-nav button:active{transform:scale(.96)}
.bottom-nav svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* ===== Cards ===== */
.card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:16px;
  box-shadow:var(--shadow-1);
}
.card + .card{margin-top:12px}
.card-row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.card-title{font-weight:700;font-size:15px;margin-bottom:10px;letter-spacing:-.01em}

/* ===== Lists ===== */
.list{display:flex;flex-direction:column;gap:10px}
.list-item{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:14px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  box-shadow:var(--shadow-1);
  transition:transform .12s ease, box-shadow .12s ease;
}
.list-item:active{transform:scale(.99)}
.list-item .meta{color:var(--muted);font-size:12px}
.small{font-size:12.5px;color:var(--muted)}
.strong{font-weight:600;letter-spacing:-.01em}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 16px;border-radius:12px;
  background:var(--bg-3);color:var(--text);
  border:1px solid var(--line);
  font-weight:600;font-size:14.5px;min-height:44px;
  transition:transform .1s ease,filter .15s ease,background .15s ease;
  letter-spacing:-.01em;
}
.btn:active{transform:scale(.97)}
.btn:hover{filter:brightness(.97)}
.btn.primary{
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  color:#fff;border-color:transparent;
  box-shadow:0 8px 20px -8px color-mix(in oklab,var(--brand) 70%,transparent);
}
.btn.primary:hover{filter:brightness(1.03)}
.btn.ghost{background:transparent;border-color:transparent}
.btn.ghost:hover{background:var(--bg-3)}
.btn.danger{background:transparent;color:var(--err);border-color:color-mix(in oklab,var(--err) 30%,var(--line))}
.btn.danger:hover{background:var(--err-soft)}
.btn.wide{width:100%}
.btn.sm{min-height:36px;padding:8px 12px;font-size:13px;border-radius:10px}
.btn.icon{padding:10px;min-height:40px;min-width:40px;border-radius:10px}
.btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ===== Inputs ===== */
.input,.textarea,.select{
  width:100%;background:var(--bg-2);color:var(--text);
  border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;min-height:44px;
  transition:border-color .15s ease,box-shadow .15s ease;
}
.input:focus,.textarea:focus,.select:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 4px color-mix(in oklab,var(--brand) 15%,transparent);
}
.textarea{min-height:88px;resize:vertical}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field label{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.01em}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}

/* ===== Chips ===== */
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{
  background:var(--bg-2);border:1px solid var(--line);
  padding:7px 12px;border-radius:100px;font-size:12.5px;color:var(--text-2);
  font-weight:500;transition:all .15s ease;
}
.chip:active{transform:scale(.97)}
.chip.on{background:var(--brand-soft);color:var(--brand);border-color:color-mix(in oklab,var(--brand) 30%,var(--line))}

/* ===== Session / execution ===== */
.session-header{
  position:sticky;top:0;background:color-mix(in oklab,var(--bg) 92%,transparent);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  z-index:5;
  padding:12px 16px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:10px;
}
.session-header .title{font-weight:700;letter-spacing:-.01em}
.session-header .stat{color:var(--muted);font-size:12px}
.session-header .timer-big{font-variant-numeric:tabular-nums;font-size:16px;font-weight:700;color:var(--brand)}

.ex-block{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin:12px 0;box-shadow:var(--shadow-1)}
.ex-title{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px}
.ex-title h3{margin:0;font-size:16px;font-weight:700;letter-spacing:-.01em}

.ex-hist{
  background:var(--bg-3);
  border-radius:10px;
  padding:10px 12px;margin-bottom:12px;font-size:12.5px;color:var(--muted);
  line-height:1.5;
}
.ex-hist .prev{color:var(--text-2)}
.ex-hist .prev + .prev{margin-top:2px}
.ex-hist .suggestion{margin-top:8px;color:var(--brand);font-weight:600}

/* Sets table */
.sets-table{display:grid;grid-template-columns:34px minmax(0,1fr) minmax(0,1fr) 56px 44px;gap:6px;align-items:center;margin-top:4px}
.sets-table .th{color:var(--muted);font-size:11px;text-align:center;font-weight:600;letter-spacing:.03em;text-transform:uppercase;padding:4px 0}
.sets-table .set-idx{
  background:var(--bg-3);border:1px solid var(--line);
  border-radius:10px;height:44px;display:flex;align-items:center;justify-content:center;
  font-weight:700;color:var(--muted);cursor:pointer;transition:all .15s ease;
}
.sets-table .set-idx:active{transform:scale(.95)}
.sets-table .set-idx.warmup{color:var(--warn);background:var(--warn-soft);border-color:color-mix(in oklab,var(--warn) 30%,var(--line))}
.sets-table .set-idx.drop{color:#7c3aed;background:#f3ecff;border-color:#e0d1ff}
.sets-table .set-idx.failure{color:var(--err);background:var(--err-soft);border-color:color-mix(in oklab,var(--err) 30%,var(--line))}
.sets-table input{
  background:var(--bg-2);border:1px solid var(--line);
  border-radius:10px;height:44px;text-align:center;padding:0 6px;min-height:44px;
  font-weight:600;
  width:100%;min-width:0;
  transition:border-color .15s ease,box-shadow .15s ease;
}
.sets-table input:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 3px color-mix(in oklab,var(--brand) 12%,transparent);
}
.sets-table .rpe-btn{
  background:var(--bg-2);border:1px solid var(--line);
  border-radius:10px;height:44px;text-align:center;color:var(--muted);font-weight:700;
}
.sets-table .rpe-btn.set{color:var(--brand);background:var(--brand-soft);border-color:color-mix(in oklab,var(--brand) 30%,var(--line))}
.sets-table .set-done{
  height:44px;border-radius:10px;background:var(--bg-3);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--muted-2);
  transition:all .15s ease;
}
.sets-table .set-done:active{transform:scale(.94)}
.sets-table .set-done.done{background:var(--ok);color:#fff;border-color:transparent;box-shadow:0 6px 14px -6px color-mix(in oklab,var(--ok) 60%,transparent)}
.sets-table .set-done.done svg{stroke-width:2.5}

/* Rest timer bar */
.rest-bar{
  position:fixed;left:12px;right:12px;bottom:calc(var(--nav-h) + var(--safe-bottom) + 8px);
  background:var(--bg-2);border:1px solid var(--line);border-radius:16px;
  padding:12px 16px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  transform:translateY(150%);transition:transform .25s cubic-bezier(.22,.94,.44,1.04);
  z-index:15;
  box-shadow:var(--shadow-3);
}
.rest-bar.on{transform:translateY(0)}
.rest-bar .label{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.02em;text-transform:uppercase}
.rest-bar .time{font-size:28px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand);line-height:1;margin-top:2px}
.rest-bar .actions{display:flex;gap:6px}
.rest-bar .btn{min-height:36px;padding:6px 10px;font-size:13px}

/* ===== Modal ===== */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(15,23,42,.4);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
  z-index:100;
  display:flex;align-items:flex-end;justify-content:center;
  animation:fadeIn .15s ease;
}
.modal{
  background:var(--bg-2);width:100%;max-width:540px;
  border-radius:20px 20px 0 0;
  padding:20px 16px calc(20px + var(--safe-bottom));
  max-height:88vh;overflow:auto;
  border:1px solid var(--line);border-bottom:0;
  animation:slideUp .25s cubic-bezier(.22,.94,.44,1.04);
}
@media(min-width:720px){
  .modal-backdrop{align-items:center;padding:20px}
  .modal{border-radius:20px;border-bottom:1px solid var(--line)}
}
.modal h3{margin:0 0 14px;font-size:18px;letter-spacing:-.01em}
.modal .actions{display:flex;gap:8px;margin-top:16px;justify-content:flex-end;flex-wrap:wrap}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}

/* ===== Toast ===== */
#toast-root{position:fixed;left:0;right:0;top:calc(14px + var(--safe-top));z-index:200;display:flex;flex-direction:column;align-items:center;gap:6px;pointer-events:none}
.toast{
  background:var(--bg-2);color:var(--text);
  border:1px solid var(--line);
  border-radius:100px;padding:8px 16px;
  box-shadow:var(--shadow-2);font-size:13px;font-weight:500;
  animation:toastIn .2s ease;
}
.toast.ok{background:var(--ok);color:#fff;border-color:transparent}
.toast.err{background:var(--err);color:#fff;border-color:transparent}
@keyframes toastIn{from{transform:translateY(-8px);opacity:0}to{transform:translateY(0);opacity:1}}

/* ===== Utilities ===== */
.row{display:flex;align-items:center;gap:8px}
.spacer{flex:1}
.hidden{display:none!important}
.muted{color:var(--muted)}
.center{text-align:center}
.mt{margin-top:12px}.mb{margin-bottom:12px}
.pill{
  background:var(--brand-soft);color:var(--brand);
  border-radius:100px;padding:3px 10px;font-size:11px;font-weight:700;letter-spacing:.02em;
  text-transform:uppercase;
}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:14px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.tabs button{padding:12px 14px;color:var(--muted);font-weight:600;border-bottom:2px solid transparent;font-size:14px;white-space:nowrap;transition:color .15s ease}
.tabs button.on{color:var(--text);border-color:var(--brand)}
.tabs button:active{opacity:.7}

/* ===== Calendar ===== */
.calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.cal-day{
  aspect-ratio:1;background:var(--bg-3);border:1px solid var(--line-2);
  border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--muted);position:relative;font-weight:500;
  transition:transform .1s ease;
}
.cal-day.has{background:var(--brand-soft);color:var(--brand);border-color:color-mix(in oklab,var(--brand) 30%,var(--line));font-weight:700;cursor:pointer}
.cal-day.has:active{transform:scale(.94)}
.cal-day.today{box-shadow:inset 0 0 0 2px var(--brand)}

/* ===== Metric tiles ===== */
.metric-tile{
  background:var(--bg-3);border:1px solid var(--line-2);
  border-radius:12px;padding:12px 12px;
}
.metric-tile .metric-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-weight:600}
.metric-tile .metric-value{font-size:18px;font-weight:700;margin-top:4px;letter-spacing:-.01em}

/* ===== Charts ===== */
.mini-chart{width:100%;height:120px}

/* ===== Drag & drop ===== */
.dragging{opacity:.4}
.drag-over{outline:2px dashed var(--brand);outline-offset:-4px}

/* ===== Empty state ===== */
.empty{padding:32px 20px;text-align:center;color:var(--muted)}
.empty h4{margin:0 0 6px;color:var(--text);font-size:16px;font-weight:600}

/* ===== PR ===== */
.pr{color:var(--warn);font-weight:700}

/* ===== Sync status pill ===== */
.sync-status{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:100px;
  background:var(--bg-3);border:1px solid var(--line);
  font-size:11.5px;color:var(--muted);font-weight:600;letter-spacing:.01em;
  transition:background .15s ease;
}
.sync-status:active{transform:scale(.97)}
.sync-status .dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.sync-status.syncing .dot{animation:pulse 1.2s ease-in-out infinite}
.sync-status.ok{color:var(--ok)}
.sync-status.pending{color:var(--warn)}
.sync-status.offline{color:var(--muted)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* ===== Standalone PWA polish ===== */
@media (display-mode:standalone){
  body{background:var(--bg)}
}

/* ===== Welcome ===== */
.welcome{min-height:100dvh;display:flex;align-items:flex-start;justify-content:center;padding:32px 16px 40px}
.welcome-inner{width:100%;max-width:440px}
.welcome-brand{text-align:center;padding:24px 0 8px}
.welcome-logo{margin:0 auto 12px}
.welcome-logo svg{width:72px;height:72px;border-radius:16px;box-shadow:var(--shadow-2)}
.welcome-brand h1{font-size:36px;font-weight:800;letter-spacing:-.02em;margin:0}
.welcome-sub{color:var(--muted);margin-top:6px}