:root {
  --color-navy: #0B1D33;
  --color-blue-dark: #123A5A;
  --color-blue: #1F5A7A;
  --color-muted: #6B7C8A;
  --color-bg: #D7DDE2;
  --color-white: #FFFFFF;
  --color-soft: #F5F7F9;
  --color-border: rgba(11, 29, 51, 0.14);
  --color-shadow: rgba(11, 29, 51, 0.16);

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;

  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

@media (min-width: 761px) {
  html {
    scroll-snap-type: y mandatory;
  }

  .hero,
  .screen-section {
    scroll-snap-align: start;
    scroll-snap-stop: always;
  }
}

body {
  margin: 0;
  overflow-x: hidden;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-navy);
  background: var(--color-bg);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.hero,
.screen-section {
  min-height: 100vh;
  padding: 32px;
  display: grid;
  place-items: center;
}

.hero {
  color: var(--color-white);
  background:
    radial-gradient(circle at top right, rgba(31, 90, 122, 0.95), transparent 32%),
    linear-gradient(135deg, var(--color-navy), var(--color-blue-dark));
}

.hero__content {
  width: min(100%, var(--max-width));
  min-height: calc(100vh - 64px);

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.hero__eyebrow,
.step-label {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__eyebrow {
  background: rgba(255, 255, 255, 0.14);
}

.hero h1 {
  max-width: 780px;
  margin: 24px 0 18px;
  font-size: clamp(3rem, 8vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
}

.hero__description {
  max-width: 620px;
  margin: 0 0 36px;
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  line-height: 1.5;
  color: var(--color-bg);
}

.hero__button,
.button {
  border: 0;
  border-radius: 999px;
  text-decoration: none;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0 24px;
  font-weight: 800;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.hero__button {
  color: var(--color-navy);
  background: var(--color-white);
}

.button:hover,
.hero__button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px var(--color-shadow);
}

.screen-section {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.34), rgba(255, 255, 255, 0));
}

.section-card {
  width: min(100%, var(--max-width));
  padding: clamp(24px, 5vw, 56px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 24px 70px rgba(11, 29, 51, 0.12);
  backdrop-filter: blur(12px);
}

.section-card__header {
  max-width: 100%;
  margin-bottom: 32px;
}

.section-card__header p {
  width: 100%;
}

.step-label {
  color: var(--color-white);
  background: var(--color-blue);
}

.section-card h2 {
  margin: 18px 0 12px;
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.section-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.6;
}

.next-link {
  display: inline-flex;
  margin-top: 28px;
  color: var(--color-blue);
  font-weight: 900;
  text-decoration: none;
}

.next-link:hover {
  text-decoration: underline;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.form-field {
  display: grid;
  gap: 8px;
}

.form-field--wide {
  grid-column: 1 / -1;
}

.form-field span {
  font-weight: 800;
}

.form-field input,
.form-field select {
  width: 100%;
  height: 56px;
  padding: 0 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-navy);
  background: var(--color-white);
  outline: none;
}

.form-field input:focus,
.form-field select:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 4px rgba(31, 90, 122, 0.16);
}

.filename-preview,
.status-box,
.file-info,
.system-message,
.final-summary {
  margin-top: 28px;
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--color-soft);
  border: 1px solid var(--color-border);
}

.filename-preview span,
.status-box__label,
.final-summary span {
  display: block;
  margin-bottom: 8px;
  color: var(--color-muted);
  font-weight: 800;
}

.filename-preview strong,
.status-box strong,
.final-summary strong {
  display: block;
  overflow-wrap: anywhere;
  font-size: clamp(1rem, 2vw, 1.35rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button--primary {
  color: var(--color-white);
  background: var(--color-blue);
}

.button--secondary {
  color: var(--color-white);
  background: var(--color-blue-dark);
}

.button--small {
  min-height: 40px;
  padding: 0 16px;
  color: var(--color-white);
  background: var(--color-blue-dark);
  font-size: 0.9rem;
}

.button--large {
  min-height: 64px;
  padding: 0 32px;
  font-size: 1.1rem;
}

.required-columns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.required-columns p {
  width: 100%;
  font-weight: 800;
  color: var(--color-navy);
}

.required-columns code {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--color-white);
  background: var(--color-blue-dark);
}

.upload-box {
  min-height: 220px;
  border: 2px dashed rgba(31, 90, 122, 0.46);
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 28px;
  text-align: center;
  background: rgba(255, 255, 255, 0.56);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.upload-box:hover {
  border-color: var(--color-blue);
  background: var(--color-white);
  transform: translateY(-2px);
}

.upload-box input {
  display: none;
}

.upload-box__title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
}

.upload-box__hint {
  color: var(--color-muted);
  font-weight: 700;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 32px;
}

.result-card {
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
}

.result-card span {
  display: block;
  color: var(--color-muted);
  font-weight: 800;
}

.result-card strong {
  display: block;
  margin: 8px 0 18px;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1;
}

.help-link {
  display: inline-flex;
  align-items: center;

  margin-top: 12px;

  color: var(--color-primary);
  font-weight: 600;

  text-decoration: none;
  transition: color .2s ease;
}

.help-link:hover {
  text-decoration: underline;
}

@media (max-width: 760px) {
  html {
    height: 100%;
    overflow: hidden;
  }

  body {
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
    overscroll-behavior-y: contain;

    -webkit-overflow-scrolling: touch;
  }

  .hero,
  .screen-section {
    min-height: 100dvh;
    scroll-snap-align: start;
    scroll-snap-stop: normal;
    padding: 20px;
  }

  .hero {
    min-height: 100dvh;
  }

  .hero__content {
    min-height: calc(100dvh - 40px);
    justify-content: center;
  }

  .hero__button {
    margin-top: clamp(72px, 12vh, 120px);
  }

  .section-card {
    min-height: calc(100dvh - 40px);
    display: flex;
    flex-direction: column;
    border-radius: 22px;
  }

  .form-grid,
  .results-grid {
    grid-template-columns: 1fr;
  }

  .actions,
  .button,
  .hero__button {
    width: 100%;
  }

  .button,
  .hero__button {
    min-height: 54px;
  }

  .upload-box {
    min-height: 180px;
  }

  .next-link {
    margin-top: auto;
    padding-top: 28px;
  }

  #archivo-precios .help-link {
    display: block;
    width: fit-content;

    margin-top: 12px;
    margin-bottom: 18px;

    color: var(--color-primary);
    font-size: 0.92rem;
    font-weight: 600;

    text-decoration: none;
  }

  #archivo-precios .help-link:hover {
    text-decoration: underline;
  }

  #archivo-precios .next-link {
    display: inline-block;
    margin-top: 0;
    padding-top: 0;
  }

  #datos-establecimiento .section-card {
    padding: 18px 16px;
  }

  #datos-establecimiento .section-card__header {
    margin-bottom: 12px;
  }

  #datos-establecimiento .section-card h2 {
    font-size: clamp(2.35rem, 11vw, 3.4rem);
    margin: 16px 0 10px;
  }

  #datos-establecimiento .section-card__header p {
    display: none;
  }

  #datos-establecimiento .form-grid {
    gap: 14px;
  }

  #datos-establecimiento .form-field {
    gap: 6px;
  }

  #datos-establecimiento .form-field input,
  #datos-establecimiento .form-field select {
    height: 50px;
  }

  #datos-establecimiento .field-error {
    min-height: 0;
  }

  #datos-establecimiento .filename-preview {
    margin-top: 16px;
    padding: 14px;
  }

  #datos-establecimiento .next-link {
    margin-top: 18px;
    padding-top: 0;
  }

  #datos-establecimiento .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  #datos-establecimiento .form-field:nth-child(1),
  #datos-establecimiento .form-field:nth-child(2),
  #datos-establecimiento .form-field:nth-child(5) {
    grid-column: 1 / -1;
  }

  /* Paso 3: archivo de precios */
  #archivo-precios .section-card {
    padding: 18px 20px;
  }

  /* Encabezado */
  #archivo-precios .section-card__header {
    margin-bottom: 0;
  }

  #archivo-precios .section-card h2 {
    margin: 12px 0 8px;
    font-size: clamp(2.25rem, 9vw, 2.9rem);
  }

  #archivo-precios .section-card__header p {
    font-size: 0.95rem;
    line-height: 1.35;
  }

  /* Columnas requeridas */
  #archivo-precios .required-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 22px 0;
  }

  #archivo-precios .required-columns p {
    grid-column: 1 / -1;
    width: auto;
    line-height: 1.2;
  }

  #archivo-precios .required-columns code {
    width: 100%;
    min-width: 0;
    padding: 8px 6px;
    font-size: 0.72rem;
    text-align: center;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  /* Área de selección */
  #archivo-precios .upload-box {
    height: 130px;
    min-height: 0;
    padding: 14px 16px;
    gap: 4px;
  }

  #archivo-precios .upload-box__title {
    font-size: 1.2rem;
    line-height: 1.2;
  }

  #archivo-precios .upload-box__hint {
    max-width: 260px;
    font-size: 0.82rem;
    line-height: 1.25;
  }

  /* Archivo seleccionado */
  #archivo-precios .file-info {
    margin-top: 14px;
    padding: 11px 14px;
    font-size: 0.92rem;
  }

  #archivo-precios .field-error {
    min-height: 0;
  }

  /* Enlace inferior */
  #archivo-precios .next-link {
    margin-top: auto;
    padding-top: 24px;
  }

  /* Paso 4: procesamiento */
  #procesamiento .section-card {
    padding: 24px 22px;
  }

  #procesamiento .section-card__header {
    margin-bottom: 22px;
  }

  #procesamiento .section-card h2 {
    margin: 16px 0 10px;
  }

  #procesamiento .section-card__header p {
    font-size: 1rem;
    line-height: 1.45;
  }

  #procesamiento #procesar-archivo {
    min-height: 52px;
  }

  #procesamiento .results-grid {
    gap: 8px;
    margin-top: 16px;
  }

  #procesamiento .result-card {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "label count"
      "button button";
    align-items: center;
    gap: 10px 16px;

    padding: 12px;
  }

  #procesamiento .result-card span {
    grid-area: label;
  }

  #procesamiento .result-card strong {
    grid-area: count;
    margin: 0;
    font-size: 1.9rem;
    line-height: 1;
  }

  #procesamiento .result-card .button {
    grid-area: button;
    min-height: 42px;
  }

  #procesamiento .system-message {
    margin-top: 12px;
    padding: 10px;
  }

  #procesamiento .next-link {
    margin-top: 12px;
    padding-top: 0px;
  }

  /* Paso 5 + footer */
  #descargas-finales {
    min-height: calc(100dvh - 68px);
    padding-bottom: 12px;
  }

  #descargas-finales .section-card {
    min-height: calc(100dvh - 108px);
  }

  .site-footer {
    min-height: 68px;
    padding:
      12px
      18px
      calc(12px + env(safe-area-inset-bottom));

    gap: 2px 6px;

    font-size: clamp(0.82rem, 3.8vw, 1rem);
    line-height: 1.35;
    white-space: normal;
  }

}

.form-field input.is-invalid,
.form-field select.is-invalid,
.upload-box.is-invalid {
  border-color: #B42318;
  box-shadow: 0 0 0 4px rgba(180, 35, 24, 0.12);
}

.field-error {
  min-height: 20px;
  color: #B42318;
  font-size: 0.9rem;
  font-weight: 700;
}

.system-message.is-error {
  color: #B42318;
  background: #FFF1F0;
  border-color: rgba(180, 35, 24, 0.28);
}

.system-message.is-success {
  color: #067647;
  background: #ECFDF3;
  border-color: rgba(6, 118, 71, 0.28);
}

.catalogo-details {
  margin-top: 16px;
  padding: 3px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.catalogo-details p {
  margin: 4px 0 0;
  color: var(--color-navy);
  font-size: 0.95rem;
}

@keyframes file-confirmation-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.55;
    transform: scale(1.01);
  }
}

.file-info.is-confirmed {
  animation: file-confirmation-pulse 0.45s ease-in-out 2;
}

.upload-box.is-dragging {
  border-color: var(--color-blue);
  background: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 14px 32px var(--color-shadow);
}

#recordar-datos {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  padding: 0;
  margin: 0;
  pointer-events: none;
}

.button--outline {
  color: var(--color-blue-dark);
  background: transparent;
  border: 1px solid var(--color-border);
}

.button--outline:hover {
  background: var(--color-soft);
}

.is-success-box {
  color: #067647;
  background: #ECFDF3;
  border-color: rgba(6, 118, 71, 0.28);
}

.required-columns code {
  position: relative;
  cursor: help;
}

.required-columns code::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  transform: translateX(-50%) translateY(4px);

  min-width: 180px;
  max-width: 240px;
  padding: 0.55rem 0.75rem;

  background: #1f2937;
  color: #fff;
  font-size: 0.8rem;
  font-weight: normal;
  line-height: 1.4;
  text-align: center;

  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);

  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;

  z-index: 100;
}

.required-columns code::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 100%;
  transform: translateX(-50%);

  border: 6px solid transparent;
  border-top-color: #1f2937;

  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease;

  z-index: 101;
}

.required-columns code:hover::after,
.required-columns code:hover::before {
  opacity: 1;
  visibility: visible;
}

.required-columns code:hover::after {
  transform: translateX(-50%) translateY(0);
}

.site-footer {
  width: 100%;
  padding: 18px 24px;

  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 8px;

  color: var(--color-navy);
  text-align: center;
  font-size: 1rem;
  line-height: 1.4;
}