/* ============================================
   Currenton — Design tokens
   ============================================ */
:root {
  --color-primary: #004172;
  --color-primary-dark: #00335a;
  --color-accent: #7eb6d9;
  --color-accent-light: #e8f3fa;
  --color-text: #1a2b3c;
  --color-text-muted: #5a6b7d;
  --color-text-light: #8a9bab;
  --color-border: #e2e8f0;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fb;
  --color-whatsapp: #25d366;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --container-max: 1120px;
  --header-height: 72px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 65, 114, 0.06);
  --transition: 0.2s ease;
}

/* ============================================
   Reset & base
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-muted);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ============================================
   Layout
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Typography helpers
   ============================================ */
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section-label::before {
  content: '— ';
  opacity: 0.6;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
}

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

.btn--outline:hover {
  border-color: var(--color-primary);
  background: var(--color-accent-light);
}

.btn--sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

/* ============================================
   Header
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: 6px;
}

.logo__text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav__list {
  display: flex;
  gap: 32px;
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.whatsapp-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-whatsapp);
  transition: opacity var(--transition);
}

.whatsapp-link:hover {
  opacity: 0.8;
}

.whatsapp-link__number {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 16px 24px 24px;
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav__link {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__link--whatsapp {
  color: var(--color-whatsapp);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  padding: 80px 0 64px;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 720px;
}

.hero__title-accent {
  color: var(--color-primary);
}

.hero__text {
  font-size: 1.0625rem;
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 32px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 72px;
}

/* Timeline */
.timeline {
  margin-top: 16px;
}

.timeline__track {
  position: relative;
  padding: 0 0 32px;
}

.timeline__line {
  position: absolute;
  top: 7px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-border);
}

.timeline__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  position: relative;
}

.timeline__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.timeline__dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  background: var(--color-bg);
  position: relative;
  z-index: 1;
  margin-bottom: 12px;
}

.timeline__step--active .timeline__dot {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.timeline__label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-light);
}

/* ============================================
   Services
   ============================================ */
.services {
  padding: 96px 0;
  background: var(--color-bg-alt);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-accent);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-accent-light);
  border-radius: var(--radius);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.35;
  margin-bottom: 10px;
}

.card__text {
  font-size: 0.875rem;
  line-height: 1.65;
}

/* ============================================
   Approach
   ============================================ */
.approach {
  padding: 96px 0;
}

.approach__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.approach__left .section-title {
  margin-bottom: 40px;
}

.stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat__number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

.approach__right {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-top: 8px;
}

.approach-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.approach-item__bullet {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-top: 7px;
}

.approach-item__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.approach-item__text {
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* ============================================
   Contact
   ============================================ */
.contact {
  padding: 64px 0 96px;
  background: var(--color-bg-alt);
}

.contact__banner {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact__title {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

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

.contact__whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-whatsapp);
  transition: opacity var(--transition);
}

.contact__whatsapp:hover {
  opacity: 0.8;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  font-family: inherit;
  font-size: 0.9375rem;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(126, 182, 217, 0.25);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-light);
}

.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form-status {
  font-size: 0.875rem;
  min-height: 1.25em;
}

.form-status--success {
  color: #15803d;
}

.form-status--error {
  color: #b91c1c;
}

.contact-form .btn {
  align-self: flex-start;
}

.contact-form .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__left,
.footer__right {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-light);
}

/* ============================================
   Responsive
   ============================================ */
@media (min-width: 900px) {
  .whatsapp-link__number {
    display: inline;
  }
}

@media (max-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header__actions .btn--sm {
    display: none;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .hero__actions {
    margin-bottom: 48px;
  }

  .services,
  .approach {
    padding: 64px 0;
  }

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

  .approach__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact__banner {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    gap: 32px;
  }

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

  .timeline__label {
    font-size: 0.5625rem;
  }
}

@media (max-width: 480px) {
  .stats {
    gap: 24px;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}