:root{
  --bg:#f4f7f3; --surface:#ffffff; --surface-2:#eef3ea; --border:#dde5d6;
  --text:#1f2a1c; --muted:#6b7864; --brand:#3f8f4f; --brand-d:#2f6e3c;
  --accent:#e8a13a; --danger:#c0563f; --carb:#d98c3c; --prot:#4a7fb5; --fat:#9b6dc7;
  --shadow:0 2px 10px rgba(31,42,28,.08); --radius:16px;
}
[data-theme="dark"]{
  --bg:#13160f; --surface:#1c2117; --surface-2:#232a1d; --border:#333c2a;
  --text:#e8eee0; --muted:#9aa890; --brand:#6cc47c; --brand-d:#4f9e5e;
  --accent:#e8b562; --shadow:0 2px 14px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg); color:var(--text); line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.2}
button{font-family:inherit;cursor:pointer}
a{color:var(--brand-d)}

/* topbar */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 18px;background:var(--surface);border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{font-size:30px}
.brand h1{font-size:20px;letter-spacing:-.3px}
.tagline{margin:0;font-size:12px;color:var(--muted)}
.icon-btn{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;
  width:40px;height:40px;font-size:18px;color:var(--text)}

/* tabs */
.tabs{
  display:flex;gap:4px;overflow-x:auto;padding:10px 14px;background:var(--surface);
  border-bottom:1px solid var(--border);position:sticky;top:69px;z-index:19;scrollbar-width:thin;
}
.tab{
  white-space:nowrap;border:none;background:transparent;color:var(--muted);
  padding:8px 14px;border-radius:999px;font-size:14px;font-weight:600;transition:.15s;
}
.tab:hover{background:var(--surface-2);color:var(--text)}
.tab.active{background:var(--brand);color:#fff}

main{max-width:1080px;margin:0 auto;padding:20px 16px 60px}
.view{animation:fade .2s ease}
.hidden{display:none!important}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* cards & layout */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.section-title{font-size:13px;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);
  font-weight:700;margin:6px 0 12px}
.grid{display:grid;gap:14px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.spacer{flex:1}
.muted{color:var(--muted)}
.pill{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;
  padding:3px 9px;border-radius:999px;background:var(--surface-2);color:var(--muted)}

/* hero / hoy */
.hero{background:linear-gradient(135deg,var(--brand),var(--brand-d));color:#fff;
  border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:18px}
.hero h2{font-size:24px}
.hero .day-num{font-size:13px;opacity:.9;text-transform:uppercase;letter-spacing:1px;font-weight:700}
.hero .focus{margin-top:10px;font-size:14px;opacity:.95;max-width:70ch}
.hero .week-tag{display:inline-block;margin-top:12px;background:rgba(255,255,255,.18);
  padding:5px 12px;border-radius:999px;font-size:13px;font-weight:600}

.meal-card{display:flex;gap:14px;align-items:flex-start;cursor:pointer}
.meal-icon{font-size:26px;width:44px;height:44px;display:grid;place-items:center;
  background:var(--surface-2);border-radius:12px;flex-shrink:0}
.meal-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--brand-d)}
.meal-title{font-weight:600;margin:2px 0}
.macro-line{display:flex;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:4px}
.macro-line b{color:var(--text)}

/* buttons */
.btn{border:1px solid var(--border);background:var(--surface-2);color:var(--text);
  padding:9px 14px;border-radius:10px;font-weight:600;font-size:14px;transition:.15s}
.btn:hover{border-color:var(--brand)}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-d)}
.btn-sm{padding:5px 10px;font-size:13px;border-radius:8px}
input,select{font-family:inherit;font-size:14px;padding:9px 12px;border:1px solid var(--border);
  border-radius:10px;background:var(--surface);color:var(--text)}
input[type=search]{width:100%}

/* recipe tiles */
.recipe-tile{cursor:pointer;display:flex;flex-direction:column;gap:6px;transition:.15s}
.recipe-tile:hover{transform:translateY(-3px);border-color:var(--brand)}
.recipe-tile .rt-title{font-weight:600;font-size:15px}
.tag-meal{align-self:flex-start;font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;
  background:var(--surface-2);color:var(--brand-d);text-transform:capitalize}
.macros-mini{display:flex;gap:8px;font-size:12px;color:var(--muted);margin-top:auto;flex-wrap:wrap}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:3px;vertical-align:middle}
.dot.k{background:var(--accent)}.dot.c{background:var(--carb)}.dot.p{background:var(--prot)}.dot.f{background:var(--fat)}

/* plan grid */
.plan-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.plan-day{border:1px solid var(--border);border-radius:12px;padding:12px;background:var(--surface);
  cursor:pointer;transition:.15s;position:relative}
.plan-day:hover{border-color:var(--brand);transform:translateY(-2px)}
.plan-day.today{outline:2px solid var(--brand)}
.plan-day.done{background:var(--surface-2)}
.plan-day .pd-day{font-weight:700;font-size:15px}
.plan-day .pd-week{font-size:11px;color:var(--muted)}
.plan-day .pd-macros{font-size:11px;color:var(--muted);margin-top:6px}
.plan-day .check{position:absolute;top:8px;right:8px;font-size:14px}

/* progress / macros */
.macro-bar{margin:10px 0}
.macro-bar .mb-head{display:flex;justify-content:space-between;font-size:13px;margin-bottom:4px}
.bar{height:10px;background:var(--surface-2);border-radius:999px;overflow:hidden}
.bar > span{display:block;height:100%;border-radius:999px;transition:width .3s}
.ketosis{padding:12px 16px;border-radius:12px;font-weight:600;text-align:center}
.ketosis.in{background:#e6f4e9;color:#2f6e3c}
.ketosis.out{background:#fbeae5;color:#c0563f}
[data-theme="dark"] .ketosis.in{background:#1f3a26;color:#9ee0aa}
[data-theme="dark"] .ketosis.out{background:#3a2620;color:#e3a08c}
.log-item{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}
.log-item:last-child{border-bottom:none}
.weight-chart{display:flex;align-items:flex-end;gap:4px;height:120px;padding-top:10px}
.weight-chart .wc-bar{flex:1;background:var(--brand);border-radius:4px 4px 0 0;min-height:3px;position:relative}
.weight-chart .wc-bar:hover::after{content:attr(data-v);position:absolute;bottom:100%;left:50%;
  transform:translateX(-50%);background:var(--text);color:var(--bg);font-size:11px;padding:2px 6px;
  border-radius:6px;white-space:nowrap}

/* shopping */
.shop-group h3{font-size:15px;margin-bottom:8px;color:var(--brand-d)}
.shop-item{display:flex;align-items:center;gap:10px;padding:7px 0;border-bottom:1px dashed var(--border)}
.shop-item:last-child{border-bottom:none}
.shop-item.checked label{text-decoration:line-through;color:var(--muted)}
.shop-item input{width:18px;height:18px;accent-color:var(--brand)}
.shop-item .cnt{font-size:11px;color:var(--muted)}

/* heladera */
.pill.faltante{background:var(--accent);color:#3a2a08;cursor:pointer;margin:3px;font-size:13px;
  padding:5px 11px;transition:.15s}
.pill.faltante:hover{filter:brightness(1.08);transform:translateY(-1px)}
.pill.nostock{background:var(--danger);color:#fff}
.qty-val{min-width:62px;text-align:center;cursor:pointer;border-radius:8px;padding:2px 4px}
.qty-val:hover{background:var(--surface-2)}

/* guides */
.guide-card h3{font-size:16px;margin-bottom:8px}
.guide-card .gc-icon{font-size:22px;margin-right:6px}
.guide-card p{margin:6px 0;font-size:14px}

/* modal */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.55);display:grid;place-items:center;
  z-index:50;padding:16px}
.modal-card{background:var(--surface);border-radius:var(--radius);max-width:640px;width:100%;
  max-height:88vh;overflow:auto;padding:26px;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal-close{position:absolute;top:14px;right:14px;background:var(--surface-2);border:none;
  width:34px;height:34px;border-radius:50%;font-size:16px;color:var(--text)}
.modal h2{font-size:22px;margin-right:30px}
.modal ul,.modal ol{margin:10px 0;padding-left:22px}
.modal li{margin:5px 0}
.modal .tip{background:var(--surface-2);border-left:3px solid var(--accent);padding:10px 14px;
  border-radius:8px;font-size:14px;margin-top:14px}
.macro-chips{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.macro-chip{background:var(--surface-2);border-radius:10px;padding:8px 12px;text-align:center;min-width:70px}
.macro-chip .mc-val{font-weight:700;font-size:17px}
.macro-chip .mc-lbl{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}

/* auth + usuario */
.top-actions{display:flex;align-items:center;gap:10px}
.user-area{display:flex;align-items:center;gap:8px}
.user-chip{display:flex;align-items:center;gap:7px;background:var(--surface-2);border:1px solid var(--border);
  border-radius:999px;padding:5px 6px 5px 12px;font-size:14px;font-weight:600}
.user-chip .avatar{width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:13px;font-weight:700}
.user-chip .logout{background:transparent;border:none;color:var(--muted);font-size:15px;padding:2px 4px}
.user-chip .logout:hover{color:var(--danger)}
.sync-dot{width:9px;height:9px;border-radius:50%;background:var(--muted);flex-shrink:0}
.sync-dot.ok{background:var(--brand)}
.sync-dot.pending{background:var(--accent)}

.auth-screen{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:20px;
  background:linear-gradient(135deg,var(--brand),var(--brand-d));overflow:auto}
.auth-card{background:var(--surface);border-radius:20px;max-width:400px;width:100%;padding:30px;
  box-shadow:0 24px 70px rgba(0,0,0,.35)}
.auth-card .auth-logo{font-size:46px;text-align:center}
.auth-card h2{text-align:center;font-size:24px;margin:6px 0 2px}
.auth-card .auth-sub{text-align:center;color:var(--muted);font-size:13px;margin-bottom:20px}
.auth-tabs{display:flex;gap:6px;background:var(--surface-2);padding:5px;border-radius:12px;margin-bottom:18px}
.auth-tabs button{flex:1;border:none;background:transparent;color:var(--muted);font-weight:600;
  padding:9px;border-radius:9px;font-size:14px}
.auth-tabs button.active{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}
.auth-card label{display:block;font-size:13px;font-weight:600;margin:12px 0 5px}
.auth-card input{width:100%}
.auth-card .btn-primary{width:100%;margin-top:18px;padding:12px}
.auth-error{background:#fbeae5;color:#c0563f;border-radius:10px;padding:10px 14px;font-size:13px;
  margin-top:14px;text-align:center}
[data-theme="dark"] .auth-error{background:#3a2620;color:#e3a08c}
.auth-note{font-size:12px;color:var(--muted);text-align:center;margin-top:16px;line-height:1.5}

/* toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--brand-d);
  color:#fff;padding:12px 20px;border-radius:12px;font-weight:600;z-index:60;box-shadow:var(--shadow);
  animation:toastin .2s}
@keyframes toastin{from{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%,0)}}

.empty{text-align:center;color:var(--muted);padding:40px 20px}
.empty .big{font-size:40px;margin-bottom:10px}

@media(max-width:560px){
  .topbar{padding:12px 14px}
  .brand h1{font-size:18px}
  main{padding:16px 12px 50px}
  .hero{padding:18px}
}