/* ========================================
   Base & Reset
   ======================================== */

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

:root {
  --color-primary: #1D4ED8;
  --color-primary-dark: #1E3A8A;
  --color-primary-light: #3B82F6;
  --color-accent: #06B6D4;
  --color-bg: #F8FAFC;
  --color-bg-alt: #EFF6FF;
  --color-text: #0F172A;
  --color-text-light: #64748B;
  --color-white: #FFFFFF;
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --container-max: 1200px;
  --section-padding: clamp(4rem, 10vw, 6rem);
  --header-height: 72px;
  --radius: 8px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* ========================================
   Section Shared
   ======================================== */

.section {
  padding-block: var(--section-padding);
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__header {
  text-align: center;
  margin-bottom: 3rem;
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
}

.section__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin-inline: auto;
}

/* ========================================
   Header
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  height: var(--header-height);
  background: transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header--scrolled {
  background: var(--color-white);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

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

.header__logo {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  border-radius: var(--radius);
}

.header__logo img {
  width: 120px;
  height: auto;
  display: block;
  filter: contrast(1.1) brightness(1.05) drop-shadow(0 1px 2px rgba(0,0,0,0.1));
}

.header__cta {
  display: none;
}

/* Navigation */

.nav__list {
  display: flex;
  gap: 2rem;
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  opacity: 0.8;
  transition: opacity 0.2s;
}

.nav__link:hover {
  opacity: 1;
}

/* Nav toggle (mobile) */

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 110;
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-dark);
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   Hero
   ======================================== */

.hero {
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: var(--section-padding);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.hero__tag {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

.hero__trust-item {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.hero__image-wrapper {
  display: flex;
  justify-content: center;
}

.hero__image {
  width: 100%;
  max-width: 500px;
  border-radius: 1rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

/* ========================================
   About
   ======================================== */

.about__grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.about__image-wrapper {
  display: flex;
  justify-content: center;
}

.about__image {
  width: 100%;
  max-width: 480px;
  border-radius: 1rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about__text {
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.about__credential {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-primary);
  margin-bottom: 2rem;
}

.about__stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat__number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat__label {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* ========================================
   Technology (b.IA)
   ======================================== */

.tech__grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.tech__content p {
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}

.tech__subtitle {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-primary-dark);
  margin-bottom: 1rem;
}

.tech__list {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tech__list li {
  padding-left: 1.5rem;
  position: relative;
  color: var(--color-text-light);
}

.tech__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.tech__image-wrapper {
  display: flex;
  justify-content: center;
}

.tech__image {
  width: 100%;
  max-width: 480px;
  border-radius: 1rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

/* ========================================
   Services
   ======================================== */

.services__grid {
  display: grid;
  gap: 1.5rem;
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.service-card__icon {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.service-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
}

.service-card__text {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
}

.service-card__link {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.9375rem;
  transition: color 0.2s;
}

.service-card__link:hover {
  color: var(--color-primary-light);
}

/* ========================================
   Testimonials
   ======================================== */

.testimonials__grid {
  display: grid;
  gap: 2rem;
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  text-align: center;
}

.testimonial-card__video video {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.testimonial-card__label {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.testimonial-card__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1rem;
}

.testimonial-card__quote {
  font-style: italic;
  color: var(--color-text);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.testimonial-card__author strong {
  display: block;
  color: var(--color-primary-dark);
  font-family: var(--font-heading);
  font-size: 1.0625rem;
}

.testimonial-card__author span {
  font-size: 0.875rem;
  color: var(--color-primary);
}

.testimonials__cta {
  text-align: center;
  margin-top: 3rem;
}

/* ========================================
   Contact
   ======================================== */

.contact__grid {
  display: grid;
  gap: 3rem;
}

.contact__info {
  display: grid;
  gap: 1.5rem;
}

.contact__item h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}

.contact__item a,
.contact__item p {
  color: var(--color-text-light);
  font-size: 0.9375rem;
}

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

.contact__form-wrapper {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.contact__form-title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  color: var(--color-primary-dark);
  margin-bottom: 1.5rem;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact__form input,
.contact__form textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1.5px solid #e5e7eb;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: border-color 0.2s;
}

.contact__form input:focus,
.contact__form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.contact__form textarea {
  resize: vertical;
}

.contact__form-note {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-top: 1rem;
  text-align: center;
}

/* ========================================
   Footer
   ======================================== */

.footer {
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding-block: 3rem 1.5rem;
}

.footer__inner {
  display: grid;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  margin-bottom: 1.5rem;
}

.footer__brand img {
  width: 120px;
  height: auto;
  display: block;
  margin-bottom: 0.75rem;
  filter: contrast(1.1) brightness(1.05);
}

.footer__brand p {
  font-size: 0.875rem;
  opacity: 0.8;
}

.footer__nav h4,
.footer__social h4 {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  margin-bottom: 0.75rem;
}

.footer__nav ul {
  display: grid;
  gap: 0.5rem;
}

.footer__nav a,
.footer__social-link {
  font-size: 0.875rem;
  opacity: 0.8;
  transition: opacity 0.2s;
  display: inline-block;
}

.footer__nav a:hover,
.footer__social-link:hover {
  opacity: 1;
}

.footer__social {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__bottom {
  text-align: center;
}

.footer__bottom p {
  font-size: 0.8125rem;
  opacity: 0.7;
}

/* ========================================
   Media Queries
   ======================================== */

@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: 1fr 1fr;
  }

  .about__grid {
    grid-template-columns: 1fr 1.2fr;
  }

  .tech__grid {
    grid-template-columns: 1.2fr 1fr;
  }

  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact__grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer__inner {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .nav-toggle {
    display: none;
  }

  .header__cta {
    display: inline-flex;
  }

  .nav {
    display: block;
  }
}

@media (max-width: 767px) {
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--color-white);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    padding: calc(var(--header-height) + 1rem) 2rem 2rem;
    transition: right 0.3s ease;
    z-index: 105;
  }

  .nav--open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    gap: 1.5rem;
  }

  .nav__link {
    font-size: 1.125rem;
  }

  .header__cta {
    display: none;
  }

  .header__cta--mobile {
    display: inline-flex;
    margin-top: 1.5rem;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .stat__number {
    font-size: 1.75rem;
  }

  .header__logo {
    padding: 0.25rem 0.5rem;
  }

  .header__logo img {
    width: 90px;
  }
}