:root{
  /* Panobianco palette */
  --bg:#0D0D0D; --panel:#141414; --card:#121212; --text:#F2F2F2; --muted:#D9D9D9;
  --primary:#F25116; --primary-600:#F2421B; --accent:#401006; --border:#1E1E1E;
  --good:#27AE60; --warn:#F39C12; --bad:#E74C3C;
  --radius:14px; --shadow: 0 10px 30px rgba(0,0,0,.35);
  /* spacing & type scale */
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:20px; --sp-6:24px; --sp-8:32px;
  --fs-xs:.82rem; --fs-sm:.9rem; --fs-md:1rem; --fs-lg:1.15rem; --fs-xl:1.35rem; --fs-2xl:1.6rem;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif}
a{color:var(--text);text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:var(--sp-4);}
.grid{display:grid;gap:var(--sp-4)}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:var(--sp-5)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:12px;padding:12px 16px;cursor:pointer;font-weight:700;letter-spacing:.2px}
.btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary-600));color:#0D0D0D}
.btn.primary:hover{filter:brightness(1.05)}
.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn.ghost:hover{border-color:var(--primary)}
input,select,textarea{width:100%;background:var(--card);border:1px solid var(--border);border-radius:12px;color:var(--text);padding:12px;font-size:var(--fs-md)}
label{font-size:var(--fs-sm);color:var(--muted);margin-bottom:6px;display:block}
header.app{position:sticky;top:0;background:rgba(13,13,13,.85);backdrop-filter:blur(10px);z-index:20;border-bottom:1px solid var(--border)}
nav.top{display:flex;gap:12px;align-items:center;justify-content:space-between;padding:12px 16px}
nav.top .brand strong{font-size:var(--fs-lg);background:linear-gradient(90deg,var(--primary),var(--primary-600));-webkit-background-clip:text;background-clip:text;color:transparent}
nav.top .links{display:flex;gap:8px}
nav.top .links a{padding:8px 12px;border-radius:12px;border:1px solid transparent;color:var(--muted)}
nav.top .links a.active, nav.top .links a:hover{color:var(--text);background:rgba(242,81,22,.12); border-color:rgba(242,81,22,.35)}
.muted{color:var(--muted)}

h1{margin:8px 0 12px;font-size:var(--fs-2xl)}
h2{margin:8px 0 12px;font-size:var(--fs-xl)}
.badge{padding:4px 8px;border:1px solid var(--border);border-radius:999px;font-size:var(--fs-xs);color:var(--muted)}

/* Exercise cards accent */
.exercise-card{border-left:4px solid var(--primary);}

/* Execution: checklist & timer */
.set-row{display:grid;grid-template-columns:36px 1fr repeat(3,110px) 120px;gap:10px;align-items:center;padding:10px;border:1px solid var(--border);border-radius:12px;background:var(--card)}
.set-row.done{opacity:.85;filter:saturate(.9)}
.set-row .chk{width:22px;height:22px;accent-color:var(--primary)}
.timer{display:flex;align-items:center;gap:10px;padding:12px;border:1px dashed var(--border);border-radius:12px;background:rgba(242,81,22,.10)}
.timer .time{font-size:1.8rem;font-weight:800;letter-spacing:1px;color:var(--text)}
.timer .controls .btn{padding:8px 10px}

/* Bottom Tabbar (mobile) */
.tabbar{position:fixed;bottom:0;left:0;right:0;display:none;z-index:50;background:#0f0f0f;border-top:1px solid var(--border)}
.tabbar .inner{display:flex;justify-content:space-around;gap:8px;padding:8px 8px}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 6px;border-radius:10px;color:var(--muted);font-size:var(--fs-xs)}
.tabbar a.active, .tabbar a:hover{color:var(--text);background:rgba(242,81,22,.10)}

/* Mini timer floating (mobile only, on execucao) */
.mini-timer{display:none;position:fixed;bottom:64px;left:12px;right:12px;background:linear-gradient(135deg,rgba(242,81,22,.25),rgba(242,66,27,.25));border:1px solid rgba(242,81,22,.35);backdrop-filter:blur(6px);border-radius:14px;padding:10px 12px;z-index:45}
.mini-timer .row{display:flex;align-items:center;justify-content:space-between;gap:8px}
.mini-timer .time{font-weight:900;font-size:1.3rem}

/* Responsive */
@media (max-width: 860px){
  .container{padding:12px 14px 92px;} /* bottom padding for tabbar */
  nav.top .links{display:none} /* keep header clean on mobile */
  .tabbar{display:block}
}
@media (max-width: 560px){
  .set-row{grid-template-columns:32px 1fr 1fr 1fr;}
  .set-row input[aria-label="RIR"], .set-row button{grid-column:span 1}
  .set-row input[aria-label="Reps"], .set-row input[aria-label="Carga"]{min-width:0}
  .timer{display:none} /* hide big timer on small screens */
  .mini-timer{display:block}
}