@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* Estetica inspirada en stronglifts.com: cabecera roja, fondo blanco, texto negro,
   Inter en negrita, botones azules de esquinas chicas, paneles gris claro. */
:root {
  --red-600: #d22e2e;
  --red-700: #b02424;
  --red-800: #8f1c1c;
  --blue-600: #393ddb;
  --blue-700: #2c30b8;
  --blue-50:  #eceefd;

  --white: #ffffff;
  --grey-50:  #f4f4f4;
  --grey-100: #eeeeee;
  --grey-200: #dddddd;
  --grey-300: #cccccc;
  --grey-500: #6b6b6b;
  --grey-700: #313131;
  --ink: #000000;
  --ink-2: #181818;

  --green-600: #1e7a3c;
  --green-tint: #e2f4e8;
  --amber-600: #8c5a0e;
  --amber-tint: #fbedd7;
  --critical: #b3261e;
  --critical-tint: #fbe6e3;
  --info: #2a4a8a;
  --info-tint: #e6ecf8;

  --page: var(--white);
  --surface: var(--grey-50);
  --surface-sunken: var(--grey-100);
  --text: var(--ink);
  --text-secondary: var(--grey-700);
  --muted: var(--grey-500);
  --border: var(--grey-200);
  --border-strong: var(--grey-300);

  --primary: var(--blue-600);
  --primary-hover: var(--blue-700);
  --primary-tint: var(--blue-50);
  --on-primary: #ffffff;

  --good: var(--green-600);
  --good-tint: var(--green-tint);
  --warning: var(--amber-600);
  --warning-tint: var(--amber-tint);
  --neutral: var(--grey-500);
  --neutral-tint: var(--grey-100);

  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: var(--font-body);

  --fs-sm: 0.8125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.563rem;
  --fs-2xl: 1.953rem;
  --fs-3xl: 2.441rem;

  --radius-sm: 4px;
  --radius: 5px;
  --radius-lg: 5px;
  --radius-full: 999px;

  --ease-out: cubic-bezier(.16,1,.3,1);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}
a { color: var(--primary); }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline-offset: 0; }
::selection { background: var(--primary); color: #fff; }

.container { max-width: 960px; margin: 0 auto; padding-inline: clamp(1rem, 4vw, 1.75rem); padding-block: 1.25rem; }
@media (min-width: 900px) { .container { padding-block: 2rem; } }

/* --- Topbar: roja, como StrongLifts --- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .25rem 1rem;
  padding: .55rem clamp(1rem, 4vw, 1.75rem);
  background: var(--red-600);
  position: sticky; top: 0; z-index: 10;
}
.topbar .brand {
  display: flex; align-items: center; gap: .55rem;
  font-weight: 800; color: #fff; text-decoration: none;
  font-size: 1.35rem; letter-spacing: .02em; text-transform: uppercase;
}
.topbar .brand svg { width: 22px; height: 22px; color: #fff; flex: none; }
.topbar nav { display: flex; gap: .1rem; align-items: center; flex-wrap: wrap; }
.topbar a.navlink {
  color: #fff; text-decoration: none; font-size: .9rem; font-weight: 600;
  padding: .5rem .8rem; border-radius: var(--radius-sm); min-height: 40px;
  display: inline-flex; align-items: center;
  transition: background .15s var(--ease-out);
}
.topbar a.navlink:hover { background: var(--red-700); color: #fff; }
.topbar a.navlink.active-link { background: var(--red-800); color: #fff; }
@media (max-width: 700px) { .topbar { flex-direction: column; align-items: flex-start; } }

/* --- Cards / paneles gris claro --- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1.25rem; }
.card h2 { margin-top: 0; font-weight: 700; font-size: var(--fs-lg); letter-spacing: -.01em; }
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: .35rem; flex-wrap: wrap; }

h1 { font-weight: 800; font-size: var(--fs-2xl); line-height: 1.1; margin: 0 0 .3rem; letter-spacing: -.02em; }
@media (min-width: 640px) { h1 { font-size: var(--fs-3xl); } }
.muted { color: var(--muted); font-size: var(--fs-sm); }
.text-secondary { color: var(--text-secondary); }

/* --- Stat tiles --- */
.stats-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: .9rem; margin-bottom: 1.25rem; }
@media (min-width: 720px) { .stats-row { grid-template-columns: repeat(4, 1fr); } }
.stat-tile { background: var(--surface); border: 1px solid var(--border); border-top: 4px solid var(--red-600); border-radius: var(--radius); padding: 1.05rem 1.25rem; }
.stat-tile .stat-label { font-size: .74rem; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.stat-tile .stat-value { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; margin-top: .25rem; font-variant-numeric: tabular-nums; }
.stat-tile .stat-value.good { color: var(--good); }
.stat-tile .stat-value.critical { color: var(--critical); }
.stat-tile .stat-sub { font-size: .8rem; color: var(--text-secondary); margin-top: .2rem; }

/* --- Barras de macros --- */
.macro-bar-row { margin-bottom: .9rem; }
.macro-bar-row:last-child { margin-bottom: 0; }
.macro-bar-label { display: flex; justify-content: space-between; font-size: .82rem; font-weight: 700; margin-bottom: .3rem; }
.macro-bar-label .val { font-variant-numeric: tabular-nums; color: var(--text-secondary); font-weight: 500; }
.macro-bar-track { height: 10px; border-radius: var(--radius-full); background: var(--grey-200); overflow: hidden; }
.macro-bar-fill { height: 100%; border-radius: var(--radius-full); background: var(--primary); transition: width .3s var(--ease-out); }
.macro-bar-fill.over { background: var(--red-600); }
.macro-bar-fill.cal { background: var(--ink-2); }

/* --- Grid --- */
.grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid.cols-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; } }

/* --- Forms --- */
label { display: block; font-size: .84rem; color: var(--text-secondary); font-weight: 600; margin-bottom: .35rem; margin-top: .9rem; }
label:first-child { margin-top: 0; }
input[type=text], input[type=password], input[type=email], input[type=number],
input[type=date], input[type=file], select, textarea {
  width: 100%; min-height: 44px; padding: .6rem .75rem;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  font-size: .95rem; background: #fff; color: var(--text); font-family: inherit;
  transition: border-color .15s var(--ease-out), box-shadow .15s var(--ease-out);
}
textarea { min-height: 80px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-tint); }
input::placeholder { color: #8a8a8a; }
.field-hint { font-size: .78rem; color: var(--muted); margin-top: .3rem; }
.field-row { display: grid; gap: .75rem; grid-template-columns: 1fr; }
@media (min-width: 560px) { .field-row.cols-2 { grid-template-columns: 1fr 1fr; } .field-row.cols-3 { grid-template-columns: 1fr 1fr 1fr; } }

/* --- Botones: azules, esquinas chicas --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  min-height: 44px; padding: .6rem 1.2rem; border-radius: var(--radius); border: 2px solid transparent;
  font-size: .92rem; font-weight: 700; cursor: pointer; text-decoration: none; text-align: center;
  font-family: inherit;
  transition: background .15s var(--ease-out), border-color .15s var(--ease-out), transform .1s var(--ease-out);
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--ink-2); }
.btn-secondary:hover { background: var(--ink-2); color: #fff; }
.btn-ghost { background: transparent; color: var(--primary); border-color: transparent; }
.btn-ghost:hover { background: var(--primary-tint); color: var(--primary-hover); }
.btn-danger { background: var(--red-600); color: #fff; }
.btn-danger:hover { background: var(--red-700); }
.btn-block { width: 100%; justify-content: center; }
.btn-sm { min-height: 36px; padding: .4rem .85rem; font-size: .82rem; }

.status { display: inline-flex; align-items: center; gap: .4rem; padding: .3rem .75rem .3rem .55rem; border-radius: var(--radius-full); font-size: .8rem; font-weight: 700; }
.status .dot { width: 7px; height: 7px; border-radius: 999px; flex: none; }
.status-good { background: var(--good-tint); color: var(--good); } .status-good .dot { background: var(--good); }
.status-warning { background: var(--warning-tint); color: var(--warning); } .status-warning .dot { background: var(--warning); }
.status-critical { background: var(--critical-tint); color: var(--critical); } .status-critical .dot { background: var(--critical); }
.status-info { background: var(--info-tint); color: var(--info); } .status-info .dot { background: var(--info); }
.status-neutral { background: var(--neutral-tint); color: var(--text-secondary); } .status-neutral .dot { background: var(--neutral); }

.badge { display: inline-block; padding: .2rem .65rem; border-radius: var(--radius-full); font-size: .76rem; font-weight: 700; background: var(--ink-2); color: #fff; }

.alert { display: flex; align-items: center; gap: .5rem; padding: .75rem 1rem; border-radius: var(--radius-sm); font-size: .88rem; margin-bottom: 1rem; border-left: 4px solid transparent; }
.alert-success { background: var(--good-tint); color: var(--good); border-left-color: var(--good); }
.alert-error { background: var(--critical-tint); color: var(--critical); border-left-color: var(--critical); }
.alert-info { background: var(--info-tint); color: var(--info); border-left-color: var(--info); }

.icon { width: 16px; height: 16px; flex: none; color: var(--muted); }

.table-wrap { overflow-x: auto; margin-top: .5rem; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; min-width: 380px; }
th, td { text-align: left; padding: .6rem .5rem; border-bottom: 1px solid var(--border); font-size: .87rem; vertical-align: middle; }
th { color: var(--text-secondary); font-weight: 700; font-size: .73rem; text-transform: uppercase; letter-spacing: .05em; border-bottom: 2px solid var(--ink-2); }
td { font-variant-numeric: tabular-nums; }

/* --- Login: fondo rojo --- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1rem; background: var(--red-600); }
.login-card { background: #fff; border-radius: var(--radius); box-shadow: 0 10px 30px rgba(0,0,0,.25); padding: 2.4rem 2rem; width: 100%; max-width: 380px; }
.login-card h1 { margin: 0 0 .3rem; font-size: var(--fs-xl); text-align: center; text-transform: uppercase; letter-spacing: .02em; }
.login-icon { display: flex; align-items: center; justify-content: center; width: 54px; height: 54px; margin: 0 auto 1rem; border-radius: var(--radius); background: var(--red-600); color: #fff; }
.login-icon svg { width: 26px; height: 26px; }
.login-welcome { text-align: center; color: var(--text-secondary); font-size: .88rem; margin: 0 0 1.5rem; line-height: 1.6; }
.form-actions { margin-top: 1.25rem; display: flex; gap: .5rem; flex-wrap: wrap; }
form.inline-form { display: inline; }

/* --- Ejercicios / series --- */
.ejercicio-row { background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--red-600); border-radius: var(--radius); padding: .95rem 1.1rem; margin-bottom: .7rem; }
.ejercicio-row .ejercicio-head { display: flex; align-items: center; justify-content: space-between; gap: .75rem; flex-wrap: wrap; }
.ejercicio-row .ejercicio-nombre { font-weight: 700; font-size: 1rem; }
.ejercicio-row .ejercicio-grupo { font-size: .78rem; color: var(--muted); }

.set-row { display: grid; grid-template-columns: 28px 1fr 1fr auto; gap: .5rem; align-items: center; margin-top: .5rem; }
.set-row .set-num { font-size: .8rem; color: var(--muted); font-weight: 700; text-align: center; }
.set-row input { min-height: 40px; }

.pr-badge { background: var(--good-tint); color: var(--good); font-size: .72rem; font-weight: 700; padding: .15rem .5rem; border-radius: var(--radius-full); }

/* --- Comidas --- */
.comida-row { display: flex; justify-content: space-between; align-items: center; gap: .75rem; padding: .65rem 0; border-bottom: 1px solid var(--border); }
.comida-row:last-child { border-bottom: none; }
.comida-row .comida-nombre { font-weight: 600; font-size: .92rem; }
.comida-row .comida-detalle { font-size: .78rem; color: var(--muted); }
.comida-row .comida-macros { font-size: .78rem; color: var(--text-secondary); white-space: nowrap; }
.comida-tipo-label { font-size: .74rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--red-600); margin: 1rem 0 .4rem; }
.comida-tipo-label:first-child { margin-top: 0; }