/* ─────────────────────────────────────────
   CEO® Fitness — Calculadora de Macros
   Paleta: negro #080808 · off-white #F5F4F0
   Tipografía: Inter (Google Fonts)
───────────────────────────────────────── */

:root {
  --black:    #080808;
  --white:    #F5F4F0;
  --gray-1:   #111111;
  --gray-2:   #1A1A1A;
  --gray-3:   #262626;
  --muted-1:  #888888;
  --muted-2:  #4A4A4A;
  --border:   rgba(245, 244, 240, 0.07);
  --border-h: rgba(245, 244, 240, 0.22);
  --col-p:    #F5F4F0;
  --col-c:    #7A7A7A;
  --col-f:    #3E3E3E;
  --font:     'Inter', system-ui, -apple-system, sans-serif;
  --nav-h:    64px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--black);
  color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ─────────────────────────────────────────
   NAVBAR
───────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  background: var(--black);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  height: 22px;
  width: auto;
  object-fit: contain;
  object-position: left center;
}

.nav-logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--white);
}

.nav-tagline {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-1);
}

/* ─────────────────────────────────────────
   LAYOUT: grid dos columnas con sticky foto
───────────────────────────────────────── */
.layout {
  display: grid;
  grid-template-columns: 52% 48%;
  align-items: start;
  min-height: calc(100vh - var(--nav-h));
}

/* ── Columna formulario ── */
.form-side {
  position: relative;
  padding: 72px 64px 96px;
  border-right: 1px solid var(--border);
  overflow: hidden;
}

/* Todo el contenido principal en su propio contexto de apilamiento */
.navbar, .layout, .results, .site-footer {
  position: relative;
  z-index: 1;
}

/* ── Columna foto ── */
.photo-side {
  position: sticky;
  top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow: hidden;
}

.photo-bg {
  position: absolute;
  inset: 0;
  background-image: url('img/santi-hero.jpg');
  background-size: cover;
  background-position: center 15%;
  filter: grayscale(100%) contrast(1.08) brightness(0.88);
}

.photo-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    var(--black) 0%,
    rgba(8, 8, 8, 0.25) 40%,
    transparent 70%
  );
  pointer-events: none;
}

.photo-label {
  position: absolute;
  bottom: 40px;
  right: 40px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  pointer-events: none;
}

.photo-label span {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(245, 244, 240, 0.22);
}

/* ─────────────────────────────────────────
   PAGE HEADER
───────────────────────────────────────── */
.page-header { margin-bottom: 52px; }

.eyebrow {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--muted-1);
  margin-bottom: 20px;
}

h1 {
  font-size: 64px;
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.035em;
  color: var(--white);
  margin-bottom: 22px;
}

.intro {
  font-size: 14px;
  font-weight: 300;
  color: var(--muted-1);
  line-height: 1.65;
  max-width: 400px;
}

/* ─────────────────────────────────────────
   FORM
───────────────────────────────────────── */
#macro-form {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.field-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-1);
}

.label-note {
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--muted-2);
}

.field-hint {
  font-size: 11px;
  color: var(--muted-2);
  letter-spacing: 0.02em;
  margin-top: -4px;
}

/* ── Género ── */
.pill-group { display: flex; gap: 8px; }
.pill { cursor: pointer; }
.pill input { display: none; }

.pill span {
  display: inline-flex;
  align-items: center;
  padding: 9px 22px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  border: 1px solid var(--border);
  color: var(--muted-1);
  transition: all 0.2s;
  user-select: none;
}

.pill:has(input:checked) span {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

/* ── Inputs de línea ── */
.row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.line-input {
  display: flex;
  align-items: baseline;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
  transition: border-color 0.2s;
}

.line-input:focus-within { border-bottom-color: var(--border-h); }

.line-input input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--white);
  font-family: var(--font);
  font-size: 24px;
  font-weight: 300;
  padding: 0;
  min-width: 0;
  -moz-appearance: textfield;
}

.line-input input::-webkit-outer-spin-button,
.line-input input::-webkit-inner-spin-button { -webkit-appearance: none; }

.line-input input::placeholder { color: var(--muted-2); }

.unit {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.10em;
  color: var(--muted-2);
  text-transform: uppercase;
  flex-shrink: 0;
}

/* ── Select de línea ── */
.line-select {
  position: relative;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
  transition: border-color 0.2s;
}

.line-select:focus-within { border-bottom-color: var(--border-h); }

.line-select select {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--white);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 300;
  appearance: none;
  cursor: pointer;
  padding: 4px 0;
}

.line-select select option { background: var(--gray-2); color: var(--white); }

.chevron {
  width: 11px;
  height: 11px;
  color: var(--muted-2);
  pointer-events: none;
  flex-shrink: 0;
}

/* ── Objetivo: tabs ── */
.goal-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
  overflow: hidden;
}

.goal-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 16px 10px;
  cursor: pointer;
  border-right: 1px solid var(--border);
  transition: background 0.2s;
  text-align: center;
  user-select: none;
}

.goal-tab:last-child { border-right: none; }
.goal-tab input { display: none; }

.goal-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted-1);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

.goal-split {
  font-size: 10px;
  letter-spacing: 0.10em;
  color: var(--muted-2);
  transition: color 0.2s;
}

.goal-tab:has(input:checked) { background: var(--white); }
.goal-tab:has(input:checked) .goal-name  { color: var(--black); }
.goal-tab:has(input:checked) .goal-split { color: rgba(8,8,8,0.45); }

/* ── Nivel de compromiso ── */
.commitment-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
  overflow: hidden;
}

.commitment-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 16px 10px;
  cursor: pointer;
  border-right: 1px solid var(--border);
  transition: background 0.2s;
  text-align: center;
  user-select: none;
}

.commitment-tab:last-child { border-right: none; }
.commitment-tab input { display: none; }

.com-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted-1);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

.com-desc {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--muted-2);
  transition: color 0.2s;
}

.commitment-tab:has(input:checked) { background: var(--white); }
.commitment-tab:has(input:checked) .com-name { color: var(--black); }
.commitment-tab:has(input:checked) .com-desc { color: rgba(8,8,8,0.45); }

/* ── Botón ── */
.btn-calc {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  background: var(--white);
  color: var(--black);
  border: none;
  font-family: var(--font);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  margin-top: 4px;
}

.btn-calc svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn-calc:hover  { opacity: 0.85; }
.btn-calc:active { transform: scale(0.992); }

/* ─────────────────────────────────────────
   RESULTS
───────────────────────────────────────── */
.hidden { display: none !important; }

.results {
  padding: 80px 64px;
  border-top: 1px solid var(--border);
  animation: fadeUp 0.45s ease;
}

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

.results-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.results-eyebrow {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--muted-1);
}

.results-detail {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted-1);
}

.results-detail strong { color: var(--white); font-weight: 600; }
.sep { color: var(--muted-2); }

/* ── Cards ── */
.macro-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--gray-3);
  border: 1px solid var(--gray-3);
  margin-bottom: 28px;
}

.macro-card {
  background: var(--black);
  padding: 40px 28px;
  border-top: 2px solid transparent;
  transition: background 0.2s;
}

.macro-card:hover { background: var(--gray-1); }

.card-calories { border-top-color: var(--white);  }
.card-protein  { border-top-color: var(--col-p);  }
.card-carbs    { border-top-color: var(--col-c);  }
.card-fats     { border-top-color: var(--col-f);  }

.macro-num {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--white);
}

.macro-unit {
  font-size: 13px;
  color: var(--muted-1);
  margin-top: 6px;
  letter-spacing: 0.06em;
}

.macro-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-1);
  margin-top: 22px;
}

.macro-sub {
  font-size: 11px;
  color: var(--muted-2);
  margin-top: 5px;
  letter-spacing: 0.03em;
}

/* ── Barra distribución ── */
.dist-bar { margin-top: 4px; }

.dist-track {
  height: 3px;
  display: flex;
  background: var(--gray-3);
  overflow: hidden;
  margin-bottom: 16px;
}

.dist-seg {
  height: 100%;
  transition: width 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.seg-p { background: var(--col-p); }
.seg-c { background: var(--col-c); }
.seg-f { background: var(--col-f); }

.dist-legend {
  display: flex;
  gap: 28px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--muted-1);
}

.dist-legend span { display: flex; align-items: center; gap: 8px; }

.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-p { background: var(--col-p); }
.dot-c { background: var(--col-c); }
.dot-f { background: var(--col-f); }

/* ── Proyección temporal ── */
.weeks-divider {
  height: 1px;
  background: var(--border);
  margin: 48px 0;
}

.weeks-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.weeks-journey {
  display: flex;
  align-items: center;
  gap: 20px;
}

.journey-item { display: flex; flex-direction: column; gap: 6px; }

.journey-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-1);
}

.journey-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--white);
}

.journey-arrow {
  color: var(--muted-2);
  flex-shrink: 0;
}

.journey-arrow svg { width: 40px; display: block; }

.weeks-display { text-align: right; }

.weeks-num {
  font-size: 72px;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--white);
}

.weeks-unit {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--muted-1);
  margin-top: 8px;
}

.weeks-context {
  font-size: 11px;
  color: var(--muted-2);
  margin-top: 6px;
  letter-spacing: 0.03em;
}

/* ── Leyenda ── */
.results-legend {
  font-size: 11px;
  color: var(--muted-2);
  line-height: 1.65;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  letter-spacing: 0.02em;
  max-width: 680px;
}

/* ─────────────────────────────────────────
   FOOTER
───────────────────────────────────────── */
.site-footer {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 64px;
  border-top: 1px solid var(--border);
}

.footer-iso {
  height: 16px;
  width: auto;
  opacity: 0.35;
  object-fit: contain;
}

.footer-tag {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.footer-copy {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--muted-2);
  margin-left: auto;
}

/* ─────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────── */
@media (max-width: 1100px) {
  h1 { font-size: 52px; }
  .macro-num { font-size: 40px; }
  .form-side { padding: 56px 48px 80px; }
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: 48vw auto;
  }

  .photo-side {
    position: relative;
    top: 0;
    height: 48vw;
    max-height: 380px;
    grid-row: 1;
  }

  .photo-gradient {
    background: linear-gradient(to bottom, transparent 50%, var(--black) 100%);
  }

  .form-side {
    grid-row: 2;
    border-right: none;
    border-top: 1px solid var(--border);
    padding: 48px 32px 72px;
  }

  h1 { font-size: 44px; }
  .navbar { padding: 0 32px; }
  .results { padding: 56px 32px; }
  .macro-cards { grid-template-columns: repeat(2, 1fr); }
  .results-top { flex-direction: column; gap: 8px; }
  .site-footer { padding: 24px 32px; }
}

@media (max-width: 520px) {
  h1 { font-size: 34px; }
  .navbar { padding: 0 20px; }
  .row-3 { grid-template-columns: 1fr; gap: 32px; }
  .goal-tabs,
  .commitment-tabs { grid-template-columns: 1fr; }
  .goal-tab,
  .commitment-tab {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .goal-tab:last-child,
  .commitment-tab:last-child { border-bottom: none; }
  .macro-num { font-size: 34px; }
  .macro-card { padding: 24px 18px; }
  .dist-legend { flex-wrap: wrap; gap: 14px; }
  .results { padding: 40px 20px; }
  .form-side { padding: 36px 20px 60px; }
  .site-footer { padding: 20px; flex-wrap: wrap; gap: 10px; }
  .footer-copy { margin-left: 0; }
  .weeks-inner { flex-direction: column; align-items: flex-start; }
  .weeks-display { text-align: left; }
  .weeks-num { font-size: 56px; }
}