/* ==========================================================================
   Héctor Gallardo · Consultor de ecosistema digital
   Material Design 3 (Expressive)
   Estructura: 1 Tokens · 2 Base · 3 Tipografía · 4 Componentes · 5 Layout
               6 Secciones · 7 Motion · 8 Responsivo
   Para cambiar la paleta, edita únicamente los tokens --md-sys-color-*.
   ========================================================================== */

/* ---------- 1. TOKENS ---------- */
:root {
  color-scheme: light dark;

  /* Color · tema claro (semilla azul petróleo, sobria y tecnológica) */
  --md-sys-color-primary: #00668b;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #c3e8ff;
  --md-sys-color-on-primary-container: #001e2d;
  --md-sys-color-secondary: #4e616d;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #d1e5f4;
  --md-sys-color-on-secondary-container: #0a1d27;
  --md-sys-color-tertiary: #615a7c;
  --md-sys-color-on-tertiary: #ffffff;
  --md-sys-color-tertiary-container: #e7deff;
  --md-sys-color-on-tertiary-container: #1d1736;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-surface: #f6fafe;
  --md-sys-color-on-surface: #171c1f;
  --md-sys-color-surface-variant: #dce3e9;
  --md-sys-color-on-surface-variant: #40484d;
  --md-sys-color-outline: #70787d;
  --md-sys-color-outline-variant: #c0c7cd;
  --md-sys-color-surface-container-lowest: #ffffff;
  --md-sys-color-surface-container-low: #f0f4f8;
  --md-sys-color-surface-container: #eaeef2;
  --md-sys-color-surface-container-high: #e4e9ed;
  --md-sys-color-surface-container-highest: #dfe3e7;
  --md-sys-color-inverse-surface: #2c3134;
  --md-sys-color-inverse-on-surface: #edf1f5;

  /* Forma (escala de esquinas M3) */
  --md-sys-shape-xs: 4px;
  --md-sys-shape-sm: 8px;
  --md-sys-shape-md: 12px;
  --md-sys-shape-lg: 16px;
  --md-sys-shape-xl: 28px;
  --md-sys-shape-xxl: 48px;
  --md-sys-shape-full: 999px;

  /* Elevación */
  --md-elev-1: 0 1px 2px rgb(0 0 0 / .30), 0 1px 3px 1px rgb(0 0 0 / .15);
  --md-elev-2: 0 1px 2px rgb(0 0 0 / .30), 0 2px 6px 2px rgb(0 0 0 / .15);
  --md-elev-3: 0 1px 3px rgb(0 0 0 / .30), 0 4px 8px 3px rgb(0 0 0 / .15);

  /* Motion */
  --md-motion-standard: cubic-bezier(.2, 0, 0, 1);
  --md-motion-emphasized: cubic-bezier(.2, 0, 0, 1);
  --md-motion-spring: cubic-bezier(.34, 1.56, .64, 1);
  --md-motion-fast: 150ms;
  --md-motion-medium: 300ms;
  --md-motion-slow: 500ms;

  /* Tipografía */
  --md-font: "Roboto Flex", "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Layout */
  --rail-w: 80px;
  --bar-h: 64px;
  --bottom-h: 80px;
  --content-max: 1120px;
  --gutter: 16px;
}

/* Tema oscuro: automático según el sistema… */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --md-sys-color-primary: #7bd0ff;
    --md-sys-color-on-primary: #00344a;
    --md-sys-color-primary-container: #004c69;
    --md-sys-color-on-primary-container: #c3e8ff;
    --md-sys-color-secondary: #b5c9d7;
    --md-sys-color-on-secondary: #20333d;
    --md-sys-color-secondary-container: #364955;
    --md-sys-color-on-secondary-container: #d1e5f4;
    --md-sys-color-tertiary: #cdc0e9;
    --md-sys-color-on-tertiary: #332d4b;
    --md-sys-color-tertiary-container: #4a4263;
    --md-sys-color-on-tertiary-container: #e7deff;
    --md-sys-color-error: #ffb4ab;
    --md-sys-color-surface: #0f1417;
    --md-sys-color-on-surface: #dee3e7;
    --md-sys-color-surface-variant: #40484d;
    --md-sys-color-on-surface-variant: #c0c7cd;
    --md-sys-color-outline: #8a9297;
    --md-sys-color-outline-variant: #40484d;
    --md-sys-color-surface-container-lowest: #0a0f12;
    --md-sys-color-surface-container-low: #171c1f;
    --md-sys-color-surface-container: #1b2023;
    --md-sys-color-surface-container-high: #262b2e;
    --md-sys-color-surface-container-highest: #303639;
    --md-sys-color-inverse-surface: #dee3e7;
    --md-sys-color-inverse-on-surface: #2c3134;
  }
}
/* …o forzado con el botón */
:root[data-theme="dark"] {
  --md-sys-color-primary: #7bd0ff;
  --md-sys-color-on-primary: #00344a;
  --md-sys-color-primary-container: #004c69;
  --md-sys-color-on-primary-container: #c3e8ff;
  --md-sys-color-secondary: #b5c9d7;
  --md-sys-color-on-secondary: #20333d;
  --md-sys-color-secondary-container: #364955;
  --md-sys-color-on-secondary-container: #d1e5f4;
  --md-sys-color-tertiary: #cdc0e9;
  --md-sys-color-on-tertiary: #332d4b;
  --md-sys-color-tertiary-container: #4a4263;
  --md-sys-color-on-tertiary-container: #e7deff;
  --md-sys-color-error: #ffb4ab;
  --md-sys-color-surface: #0f1417;
  --md-sys-color-on-surface: #dee3e7;
  --md-sys-color-surface-variant: #40484d;
  --md-sys-color-on-surface-variant: #c0c7cd;
  --md-sys-color-outline: #8a9297;
  --md-sys-color-outline-variant: #40484d;
  --md-sys-color-surface-container-lowest: #0a0f12;
  --md-sys-color-surface-container-low: #171c1f;
  --md-sys-color-surface-container: #1b2023;
  --md-sys-color-surface-container-high: #262b2e;
  --md-sys-color-surface-container-highest: #303639;
  --md-sys-color-inverse-surface: #dee3e7;
  --md-sys-color-inverse-on-surface: #2c3134;
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

/* ---------- 2. BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--bar-h) + 16px); }
body {
  margin: 0;
  font-family: var(--md-font);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface);
  -webkit-font-smoothing: antialiased;
  transition: background var(--md-motion-medium) var(--md-motion-standard),
              color var(--md-motion-medium) var(--md-motion-standard);
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p, dl, dd { margin: 0; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
:focus-visible { outline: 3px solid var(--md-sys-color-primary); outline-offset: 2px; }

.material-symbols-outlined {
  font-family: "Material Symbols Outlined";
  font-weight: 400; font-style: normal; font-size: 24px; line-height: 1;
  letter-spacing: normal; text-transform: none; white-space: nowrap;
  -webkit-font-feature-settings: "liga"; font-feature-settings: "liga";
  -webkit-font-smoothing: antialiased; user-select: none;
}

.skip-link {
  position: fixed; left: 16px; top: -64px; z-index: 200;
  padding: 12px 20px; border-radius: var(--md-sys-shape-full);
  background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary);
  transition: top var(--md-motion-fast) var(--md-motion-standard);
}
.skip-link:focus { top: 12px; }

/* ---------- 3. TIPOGRAFÍA (escala M3 con ejes variables de Roboto Flex) ---------- */
.display   { font-size: clamp(2.125rem, 5.6vw, 3.5rem); line-height: 1.1; font-weight: 700; letter-spacing: -.02em;
             font-variation-settings: "opsz" 144, "wdth" 105; }
.headline  { font-size: clamp(1.625rem, 3.6vw, 2.25rem); line-height: 1.2; font-weight: 600; letter-spacing: -.01em;
             font-variation-settings: "opsz" 72; }
.title     { font-size: 1.25rem; line-height: 1.3; font-weight: 500; }
.subtitle  { font-size: .9375rem; line-height: 1.4; font-weight: 500; color: var(--md-sys-color-primary); }
.body-lg   { font-size: 1.0625rem; line-height: 1.65; color: var(--md-sys-color-on-surface-variant); }
.body      { font-size: .9375rem; line-height: 1.6; color: var(--md-sys-color-on-surface-variant); }
.overline  { display: inline-block; font-size: .8125rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
             color: var(--md-sys-color-primary); margin-bottom: 12px; }
.accent    { color: var(--md-sys-color-primary); }

/* ---------- 4. COMPONENTES ---------- */

/* Ripple + capa de estado */
.ripple { position: relative; overflow: hidden; isolation: isolate; }
.ripple::before {
  content: ""; position: absolute; inset: 0; z-index: -1; background: currentColor; opacity: 0;
  transition: opacity var(--md-motion-fast) var(--md-motion-standard);
}
.ripple:hover::before { opacity: .08; }
.ripple:focus-visible::before, .ripple:active::before { opacity: .10; }
.ripple__wave {
  position: absolute; border-radius: 50%; background: currentColor; opacity: .16; pointer-events: none;
  transform: scale(0); animation: ripple 600ms var(--md-motion-standard) forwards; z-index: -1;
}
@keyframes ripple { to { transform: scale(1); opacity: 0; } }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 40px; padding: 8px 24px; border-radius: var(--md-sys-shape-full);
  font-size: .875rem; font-weight: 500; letter-spacing: .01em; text-align: center;
  transition: border-radius var(--md-motion-medium) var(--md-motion-spring),
              box-shadow var(--md-motion-fast) var(--md-motion-standard),
              transform var(--md-motion-fast) var(--md-motion-standard);
}
.btn .material-symbols-outlined { font-size: 18px; }
.btn:active { transform: scale(.97); border-radius: var(--md-sys-shape-lg); }
.btn--large { min-height: 56px; padding: 12px 28px; font-size: 1rem; }
.btn--large .material-symbols-outlined { font-size: 20px; }
.btn--filled   { background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); }
.btn--filled:hover { box-shadow: var(--md-elev-1); }
.btn--tonal    { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.btn--outlined { border: 1px solid var(--md-sys-color-outline); color: var(--md-sys-color-primary); }
.btn--text     { padding: 0 12px; color: var(--md-sys-color-primary); }

.icon-button {
  width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center;
  color: var(--md-sys-color-on-surface-variant);
}

/* Chips */
.chip {
  display: inline-flex; align-items: center; gap: 8px; min-height: 32px; padding: 4px 16px;
  border-radius: var(--md-sys-shape-sm); font-size: .875rem; font-weight: 500;
  border: 1px solid var(--md-sys-color-outline-variant); color: var(--md-sys-color-on-surface-variant);
  transition: background var(--md-motion-fast), color var(--md-motion-fast), transform var(--md-motion-medium) var(--md-motion-spring);
}
.chip .material-symbols-outlined { font-size: 18px; }
.chip--assist { background: var(--md-sys-color-surface-container-low); margin-bottom: 20px; }
.chip--filter.is-selected, .chip--input.is-selected {
  background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); border-color: transparent;
}
.chip--filter { cursor: pointer; }
.chip--input  { background: var(--md-sys-color-surface-container-low); min-height: 36px; padding: 6px 18px; }
.chip--input:hover { transform: translateY(-2px); background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); }
.chip.is-hidden { display: none; }

/* Tarjetas */
.card { border-radius: var(--md-sys-shape-xl); padding: 28px; display: flex; flex-direction: column; gap: 12px; position: relative; }
.card--filled   { background: var(--md-sys-color-surface-container-highest); }
.card--tonal    { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.card--elevated { background: var(--md-sys-color-surface); box-shadow: var(--md-elev-1); }
.card--outlined { background: var(--md-sys-color-surface); border: 1px solid var(--md-sys-color-outline-variant); }
.card--primary  { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); }
.card--tonal .body, .card--primary .body-lg { color: inherit; }

/* Campos de texto (outlined, label flotante) */
.field { position: relative; display: block; }
.field input, .field textarea {
  width: 100%; font: inherit; color: var(--md-sys-color-on-surface); background: transparent;
  border: 1px solid var(--md-sys-color-outline); border-radius: var(--md-sys-shape-xs);
  padding: 16px; outline: none; resize: vertical;
  transition: border-color var(--md-motion-fast), box-shadow var(--md-motion-fast);
}
.field input:hover, .field textarea:hover { border-color: var(--md-sys-color-on-surface); }
.field input:focus, .field textarea:focus { border-color: var(--md-sys-color-primary); box-shadow: 0 0 0 1px var(--md-sys-color-primary); }
.field__label {
  position: absolute; left: 12px; top: 16px; padding: 0 4px; pointer-events: none;
  color: var(--md-sys-color-on-surface-variant); background: var(--md-sys-color-primary-container);
  transition: transform var(--md-motion-fast) var(--md-motion-standard), color var(--md-motion-fast);
  transform-origin: left top;
}
.field input:focus + .field__label, .field input:not(:placeholder-shown) + .field__label,
.field textarea:focus + .field__label, .field textarea:not(:placeholder-shown) + .field__label {
  transform: translateY(-26px) scale(.75); color: var(--md-sys-color-primary);
}
.field__error { display: none; font-size: .75rem; color: var(--md-sys-color-error); padding: 4px 16px 0; }
.field.is-invalid input, .field.is-invalid textarea { border-color: var(--md-sys-color-error); }
.field.is-invalid .field__label { color: var(--md-sys-color-error); }
.field.is-invalid .field__error { display: block; }

/* Campo trampa anti-bots (fuera de pantalla, no usar display:none) */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* Botón en estado de carga */
.btn:disabled { opacity: .6; cursor: progress; pointer-events: none; }

/* Snackbar */
.snackbar {
  position: fixed; left: 50%; bottom: calc(var(--bottom-h) + 16px); z-index: 150;
  transform: translate(-50%, 24px); opacity: 0; pointer-events: none;
  min-width: 240px; max-width: calc(100vw - 32px); padding: 14px 16px; border-radius: var(--md-sys-shape-xs);
  background: var(--md-sys-color-inverse-surface); color: var(--md-sys-color-inverse-on-surface);
  font-size: .875rem; box-shadow: var(--md-elev-3);
  transition: transform var(--md-motion-medium) var(--md-motion-spring), opacity var(--md-motion-medium);
}
.snackbar.is-visible { transform: translate(-50%, 0); opacity: 1; }

/* ---------- 5. LAYOUT ---------- */
.container { width: 100%; max-width: var(--content-max); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: 72px; }
.section--tint { background: var(--md-sys-color-surface-container-low); }
.section__header { margin-bottom: 40px; max-width: 720px; }
.grid { display: grid; gap: 16px; }
/* Evita que un hijo con contenido ancho ensanche la columna y genere scroll horizontal */
.hero__grid > *, .grid > *, .contact > *, .steps > * { min-width: 0; }
.mt-lg { margin-top: 40px; }

main { padding-top: var(--bar-h); padding-bottom: var(--bottom-h); }

/* Top app bar */
.top-app-bar {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--bar-h);
  display: flex; align-items: center; justify-content: space-between; padding: 0 8px 0 16px;
  background: var(--md-sys-color-surface);
  transition: background var(--md-motion-medium), box-shadow var(--md-motion-medium);
}
.top-app-bar.is-scrolled { background: var(--md-sys-color-surface-container); box-shadow: var(--md-elev-1); }
.top-app-bar__actions { display: flex; align-items: center; gap: 4px; }
.top-app-bar__cta { display: none; margin-left: 8px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  width: 40px; height: 40px; display: grid; place-items: center; font-size: .9rem; font-weight: 700; flex: none;
  color: var(--md-sys-color-on-primary); background: var(--md-sys-color-primary);
  border-radius: 14px 14px 14px 4px;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__name { font-weight: 600; font-size: 1rem; }
.brand__role { display: none; font-size: .75rem; color: var(--md-sys-color-on-surface-variant); }

/* Navegación adaptable (barra inferior en móvil) */
.nav {
  position: fixed; z-index: 110; inset: auto 0 0 0; height: var(--bottom-h);
  display: flex; justify-content: space-around; align-items: center; padding: 0 4px;
  background: var(--md-sys-color-surface-container);
}
.nav__item { display: flex; flex-direction: column; align-items: center; gap: 4px; flex: 1; min-width: 0; padding: 12px 0 16px;
  font-size: .6875rem; font-weight: 500; color: var(--md-sys-color-on-surface-variant); }
.nav__indicator {
  width: 56px; height: 32px; border-radius: var(--md-sys-shape-full); display: grid; place-items: center;
  transition: background var(--md-motion-medium) var(--md-motion-standard);
}
.nav__item:hover .nav__indicator { background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent); }
.nav__item.is-active { color: var(--md-sys-color-on-surface); }
.nav__item.is-active .nav__indicator { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.nav__item.is-active .material-symbols-outlined { font-variation-settings: "FILL" 1; }
.nav__label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }

/* ---------- 6. SECCIONES ---------- */

/* Hero */
.hero { padding-top: 40px; }
.hero__grid { display: grid; gap: 48px; align-items: center; }
.hero .body-lg { margin-top: 20px; max-width: 58ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.trust { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 32px; font-size: .875rem; color: var(--md-sys-color-on-surface-variant); }
.trust li { display: inline-flex; align-items: center; gap: 6px; }
.trust .material-symbols-outlined { font-size: 18px; color: var(--md-sys-color-primary); font-variation-settings: "FILL" 1; }

/* Mapa interactivo del ecosistema */
.eco { display: flex; flex-direction: column; gap: 20px; }
.eco__map {
  position: relative; width: 100%; max-width: 480px; aspect-ratio: 1; margin-inline: auto;
  background: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-xxl) var(--md-sys-shape-xl) var(--md-sys-shape-xxl) var(--md-sys-shape-xl);
}
.eco__lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.eco__lines line, .eco__ring {
  stroke: var(--md-sys-color-outline-variant); stroke-width: 1.5; fill: none; vector-effect: non-scaling-stroke;
}
.eco__ring { stroke-dasharray: 3 6; }
.eco__hub {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 26%; aspect-ratio: 1; border-radius: 34%;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; text-align: center;
  background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary);
  font-size: clamp(.625rem, 2.2vw, .8125rem); line-height: 1.1;
  box-shadow: var(--md-elev-2);
  animation: pulse 4s var(--md-motion-standard) infinite;
}
.eco__hub .material-symbols-outlined { font-size: clamp(20px, 5vw, 30px); }
@keyframes pulse {
  0%, 100% { box-shadow: var(--md-elev-2), 0 0 0 0 color-mix(in srgb, var(--md-sys-color-primary) 35%, transparent); }
  50%      { box-shadow: var(--md-elev-2), 0 0 0 14px color-mix(in srgb, var(--md-sys-color-primary) 0%, transparent); }
}
.eco__node {
  position: absolute; left: var(--x); top: var(--y); transform: translate(-50%, -50%);
  display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 64px; padding: 10px 12px;
  border-radius: var(--md-sys-shape-lg);
  background: var(--md-sys-color-surface-container-highest); color: var(--md-sys-color-on-surface);
  font-size: clamp(.6875rem, 2.4vw, .8125rem); font-weight: 500; box-shadow: var(--md-elev-1);
  transition: transform var(--md-motion-medium) var(--md-motion-spring), background var(--md-motion-fast),
              color var(--md-motion-fast), border-radius var(--md-motion-medium) var(--md-motion-spring);
}
.eco__node:hover { transform: translate(-50%, -50%) scale(1.08); }
.eco__node .material-symbols-outlined { font-size: 24px; color: var(--md-sys-color-primary); }
.eco__node.is-active {
  background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container);
  border-radius: var(--md-sys-shape-xl); transform: translate(-50%, -50%) scale(1.1);
}
.eco__caption {
  min-height: 108px; padding: 20px 24px; border-radius: var(--md-sys-shape-xl);
  background: var(--md-sys-color-surface-container); display: flex; flex-direction: column; gap: 6px;
}

/* Métricas */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 64px; }
.stat {
  display: flex; flex-direction: column; gap: 6px; padding: 20px;
  background: var(--md-sys-color-surface-container); border-radius: var(--md-sys-shape-xl);
}
.stat:nth-child(2) { border-radius: var(--md-sys-shape-xl) var(--md-sys-shape-sm) var(--md-sys-shape-xl) var(--md-sys-shape-xl); }
.stat:nth-child(3) { border-radius: var(--md-sys-shape-xl) var(--md-sys-shape-xl) var(--md-sys-shape-xl) var(--md-sys-shape-sm); }
.stat__num { font-size: 2.5rem; font-weight: 700; line-height: 1; color: var(--md-sys-color-primary); font-variation-settings: "opsz" 96; }
.stat__label { font-size: .875rem; line-height: 1.4; color: var(--md-sys-color-on-surface-variant); }

/* Servicios */
.service { transition: transform var(--md-motion-medium) var(--md-motion-spring), box-shadow var(--md-motion-medium) var(--md-motion-standard),
                       border-radius var(--md-motion-medium) var(--md-motion-spring); }
.service:hover { transform: translateY(-6px); box-shadow: var(--md-elev-3);
  border-radius: var(--md-sys-shape-xxl) var(--md-sys-shape-xl) var(--md-sys-shape-xxl) var(--md-sys-shape-xl); }
.service__icon {
  width: 56px; height: 56px; display: grid; place-items: center; border-radius: 18px 18px 18px 6px; margin-bottom: 8px;
  background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container);
}
.service__icon--secondary { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.service__icon--tertiary  { background: var(--md-sys-color-tertiary-container);  color: var(--md-sys-color-on-tertiary-container); }

/* Método */
.steps { display: grid; gap: 16px; counter-reset: step; }
.step { gap: 8px; }
.step__num {
  font-size: 2.75rem; font-weight: 800; line-height: 1; letter-spacing: -.03em;
  color: var(--md-sys-color-primary); opacity: .9; font-variation-settings: "opsz" 144, "wdth" 115;
}

/* Casos */
.case .chip { align-self: flex-start; margin-bottom: 4px; }
.case__list { display: flex; flex-direction: column; gap: 14px; margin-top: 8px; }
.case__list dt { font-size: .75rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--md-sys-color-primary); margin-bottom: 2px; }
.case__list dd { font-size: .9375rem; line-height: 1.55; color: var(--md-sys-color-on-surface-variant); }

/* Credenciales */
.facts { display: flex; flex-direction: column; gap: 16px; margin-top: 8px; }
.facts li { display: flex; gap: 16px; align-items: center; }
.facts .material-symbols-outlined {
  width: 48px; height: 48px; display: grid; place-items: center; flex: none; border-radius: 16px;
  background: var(--md-sys-color-surface); color: var(--md-sys-color-primary);
}
.facts strong { display: block; font-weight: 600; line-height: 1.3; }
.facts span:not(.material-symbols-outlined) { font-size: .875rem; opacity: .85; }

/* Stack */
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 24px; }
.skills { display: flex; flex-wrap: wrap; gap: 10px; }

/* Contacto */
.contact { display: grid; gap: 32px; padding: 28px; border-radius: var(--md-sys-shape-xxl); }
.contact .overline { color: var(--md-sys-color-on-primary-container); opacity: .8; }
.contact__info { display: flex; flex-direction: column; gap: 12px; }
.contact__links { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; margin-top: 12px; }
.contact__links a { display: inline-flex; align-items: center; gap: 12px; padding: 10px 16px; border-radius: var(--md-sys-shape-full); font-weight: 500; word-break: break-all; }
.contact__form { display: flex; flex-direction: column; gap: 22px; padding-top: 12px; }
.contact__form .btn--filled { align-self: flex-start; }

/* Footer */
.footer { padding: 24px 0 32px; border-top: 1px solid var(--md-sys-color-outline-variant); font-size: .875rem; color: var(--md-sys-color-on-surface-variant); margin-bottom: var(--bottom-h); }
.footer__inner { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; }

/* ---------- 7. MOTION ---------- */
/* El contenido solo se oculta si script.js cargó (agrega la clase .js a <html>).
   Sin JavaScript, todo el contenido es visible desde el inicio. */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity var(--md-motion-slow) var(--md-motion-emphasized), transform var(--md-motion-slow) var(--md-motion-spring); }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- 8. RESPONSIVO (clases de tamaño de ventana M3) ---------- */

/* Medium (≥600px) */
@media (min-width: 600px) {
  :root { --gutter: 24px; }
  .brand__role { display: block; }
  .top-app-bar__cta { display: inline-flex; }
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .card { padding: 32px; }
  .contact { padding: 40px; }
  .snackbar { min-width: 344px; }
}

/* Expanded (≥840px): barra inferior → navigation rail lateral */
@media (min-width: 840px) {
  :root { --gutter: 32px; }
  .top-app-bar { left: var(--rail-w); padding-left: 24px; }
  main { padding-left: var(--rail-w); padding-bottom: 0; }
  .footer { margin: 0 0 0 var(--rail-w); }
  .nav {
    inset: 0 auto 0 0; width: var(--rail-w); height: auto;
    flex-direction: column; justify-content: center; gap: 12px; padding: 16px 0;
    background: var(--md-sys-color-surface);
  }
  .nav__item { flex: none; width: 100%; padding: 4px 0; }
  .snackbar { bottom: 24px; left: calc(50% + var(--rail-w) / 2); }
  .hero__grid { grid-template-columns: 1.1fr 1fr; gap: 64px; }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .contact { grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
}

/* Large (≥1200px) */
@media (min-width: 1200px) {
  .section { padding-block: 96px; }
  .hero { padding-top: 64px; }
}