/* ============================================================
   VARIABLES
============================================================ */

:root {
  --color-primary: #FF6600;
  --color-primary-dark: #e55a00;
  --color-bg-dark: #1A0B2E;
  --color-white: #FFFFFF;
  --color-bg-light: #F5F5F5;
  --color-text: #333333;
  --color-text-on-dark: #FFFFFF;
  --color-text-muted: #666666;
  --color-border: #E0E0E0;

  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;

  --container-max: 1200px;
  --container-padding: 1.5rem;

  --header-height: 80px;
  --section-padding: 5rem 0;
  --section-padding-mobile: 3.5rem 0;

  --radius: 4px;
  --transition: 0.25s ease;
}

/* ============================================================
   RESET & BASE
============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

/* ============================================================
   LAYOUT
============================================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

section {
  padding: var(--section-padding-mobile);
}

/* ============================================================
   TYPOGRAPHY UTILITIES
============================================================ */

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.875rem;
  color: var(--color-text);
  text-align: center;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.section-title--light {
  color: var(--color-text-on-dark);
}

/* ============================================================
   BUTTONS
============================================================ */

.btn-primary {
  display: inline-block;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9375rem;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 12px 28px;
  transition: background-color var(--transition), border-color var(--transition);
  text-align: center;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  outline: none;
}

.btn-secondary {
  display: inline-block;
  background-color: transparent;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9375rem;
  border: 2px solid var(--color-white);
  border-radius: var(--radius);
  padding: 12px 28px;
  transition: background-color var(--transition), color var(--transition);
  text-align: center;
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--color-white);
  color: var(--color-bg-dark);
  outline: none;
}

/* ============================================================
   HEADER
============================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-bg-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: box-shadow var(--transition);
}

.header.is-scrolled {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.4);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header__logo {
  height: 48px;
  width: auto;
}

@media (min-width: 768px) {
  .header__logo {
    height: 56px;
  }

  .header {
    --header-height: 88px;
  }
}

.header__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-white);
  white-space: nowrap;
}

/* Hamburger */
.header__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  padding: 0;
  flex-shrink: 0;
}

.header__hamburger span {
  display: block;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.header__hamburger.is-open span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.header__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.header__hamburger.is-open span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Nav mobile */
.header__nav {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg-dark);
  padding: 1.5rem var(--container-padding);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.header__nav.is-open {
  display: block;
}

.header__nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.header__nav-link {
  display: block;
  padding: 0.625rem 0;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-white);
  transition: color var(--transition);
}

.header__nav-link:hover {
  color: var(--color-primary);
}

.header__nav-cta {
  margin-top: 0.75rem;
  display: inline-block;
}

/* Desktop nav */
@media (min-width: 768px) {
  .header__hamburger {
    display: none;
  }

  .header__nav {
    display: flex !important;
    position: static;
    background: none;
    padding: 0;
    border: none;
  }

  .header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
  }

  .header__nav-link {
    padding: 0.375rem 0.75rem;
  }

  .header__nav-cta {
    margin-top: 0;
    padding: 8px 20px;
    font-size: 0.875rem;
  }
}

/* ============================================================
   HERO
============================================================ */

.hero {
  background-color: var(--color-bg-dark);
  padding-top: calc(var(--header-height) + 4rem);
  padding-bottom: 5rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.75rem;
  max-width: 760px;
}

.hero__logo {
  height: auto;
  width: 280px;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .hero__logo {
    width: 400px;
  }
}

.hero__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 2.25rem;
  color: var(--color-text-on-dark);
  line-height: 1.15;
}

.hero__title br {
  display: none;
}

.hero__subtitle {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.75;
  max-width: 640px;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: 3rem;
  }

  .hero__title br {
    display: block;
  }
}

@media (min-width: 1280px) {
  section {
    padding: var(--section-padding);
  }

  .hero {
    padding-top: calc(var(--header-height) + 5rem);
    padding-bottom: 6rem;
  }

  .hero__title {
    font-size: 3.5rem;
  }

  .hero__subtitle {
    font-size: 1.125rem;
  }
}

/* ============================================================
   PROPUESTA DE VALOR
============================================================ */

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

.valor__intro {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
  color: var(--color-text);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.valor__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.card {
  padding: 2rem 1.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-white);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.card__icon {
  margin-bottom: 1.25rem;
}

.card__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.card__text {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .valor__cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   SERVICIOS
============================================================ */

.servicios {
  background-color: var(--color-bg-light);
}

.servicios__intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

.servicios__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.servicio {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  border-top: 3px solid var(--color-primary);
  transition: box-shadow var(--transition);
}

.servicio:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
}

.servicio__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-text);
  margin-bottom: 0.875rem;
}

.servicio__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.servicio__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.servicio__list li {
  font-size: 0.875rem;
  color: var(--color-text);
  padding-left: 1.125rem;
  position: relative;
  line-height: 1.5;
}

.servicio__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

@media (min-width: 768px) {
  .servicios__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .servicios__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

/* ============================================================
   METODOLOGÍA
============================================================ */

.metodologia {
  background-color: var(--color-bg-dark);
}

.metodologia__intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.metodologia__steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 760px;
  margin: 0 auto;
  list-style: none;
  counter-reset: none;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.step:last-child {
  border-bottom: none;
}

.step__num {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.875rem;
  color: var(--color-primary);
  line-height: 1;
  min-width: 48px;
  padding-top: 0.125rem;
}

.step__content {
  flex: 1;
}

.step__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.step__text {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9375rem;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .step {
    gap: 2rem;
    padding: 2rem 0;
  }

  .step__num {
    font-size: 2.25rem;
    min-width: 60px;
  }
}

/* ============================================================
   CONTACTO
============================================================ */

.contacto {
  background-color: var(--color-bg-light);
}

.contacto__intro {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 2.5rem;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.contacto__form {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form__label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
}

.form__input,
.form__select,
.form__textarea {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.12);
}

.form__input.is-invalid,
.form__select.is-invalid,
.form__textarea.is-invalid {
  border-color: #c0392b;
}

.form__select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23333' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form__textarea {
  resize: vertical;
  min-height: 130px;
}

.form__error {
  font-size: 0.8125rem;
  color: #c0392b;
  min-height: 1rem;
}

.form__submit {
  align-self: flex-start;
  margin-top: 0.5rem;
  min-width: 180px;
}

.form__feedback {
  font-size: 0.9375rem;
  min-height: 1.5rem;
  font-weight: 600;
}

.form__feedback.is-success {
  color: #1a7a3a;
}

.form__feedback.is-error {
  color: #c0392b;
}

.contacto__email {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.contacto__email a {
  color: var(--color-primary);
  font-weight: 600;
  transition: color var(--transition);
}

.contacto__email a:hover {
  color: var(--color-primary-dark);
}

/* ============================================================
   FOOTER
============================================================ */

.footer {
  background-color: var(--color-bg-dark);
  padding: 3rem 0 2rem;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer__top {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer__logo {
  height: 44px;
  width: auto;
}

.footer__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-white);
}

.footer__nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
}

.footer__nav-link {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
  padding: 0.25rem 0;
  display: inline-block;
}

.footer__nav-link:hover {
  color: var(--color-primary);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.footer__tagline {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-primary);
}

.footer__copy {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
}

@media (min-width: 768px) {
  .footer__top {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }

  .footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ============================================================
   MEDIA QUERIES — SECCIONES GENERALES
============================================================ */

@media (min-width: 1280px) {
  section {
    padding: var(--section-padding);
  }

  .section-title {
    font-size: 2.25rem;
    margin-bottom: 1.75rem;
  }
}