/* =============================================================================
   Colectiba Landing — Estilos globales
   Design System: Inter, paleta monocromatica calida
   ============================================================================= */

:root {
  --black: #1A1A1A;
  --black-light: #2D2D2D;
  --grey-900: #3D3D3D;
  --grey-700: #6B6B6B;
  --grey-500: #9B9B9B;
  --grey-300: #D4D4D4;
  --grey-200: #E8E8E8;
  --grey-100: #F5F5F2;
  --white: #FFFFFF;
  --warm: #F8F6F3;
  --danger: #DC2626;
  --success: #16A34A;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 200;
  padding: 12px 24px;
  background: var(--black);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
}

.skip-link:focus {
  top: 0;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--black);
  outline-offset: 2px;
  border-radius: 4px;
}

.section--dark a:focus-visible,
.section--dark button:focus-visible {
  outline-color: var(--white);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--black);
  background: var(--white);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.font-display {
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---- Layout ---- */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section--warm {
  background: var(--warm);
}

.section--dark {
  background: var(--black);
  color: var(--white);
}

/* ---- Nav ---- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--grey-200);
  height: 64px;
  display: flex;
  align-items: center;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  color: var(--black);
  text-decoration: none;
}

.nav__logo svg {
  height: 28px;
  width: auto;
}

.nav__links {
  display: flex;
  gap: 32px;
  list-style: none;
  align-items: center;
}

.nav__links a {
  color: var(--grey-700);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav__links a:hover {
  color: var(--black);
}

.nav__links a.active {
  color: var(--black);
}

.nav__mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 12px;
  min-width: 44px;
  min-height: 44px;
}

.nav__mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--black);
  margin: 5px 0;
  transition: 0.3s;
}

/* ---- Hero ---- */

.hero {
  padding: 160px 0 100px;
  text-align: center;
}

.hero__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--grey-700);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 24px;
  padding: 6px 16px;
  border: 1px solid var(--grey-200);
  border-radius: 100px;
}

.hero__title {
  font-size: 42px;
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero__subtitle {
  font-size: 18px;
  color: var(--grey-700);
  max-width: 540px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero__cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}

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

.btn--primary:hover {
  background: var(--black-light);
}

.btn--secondary {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--grey-200);
}

.btn--secondary:hover {
  border-color: var(--grey-300);
  background: var(--grey-100);
}

.btn--large {
  padding: 16px 36px;
  font-size: 15px;
}

.btn--small {
  padding: 8px 20px;
  font-size: 13px;
}

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

.btn--white:hover {
  background: var(--grey-100);
}

/* ---- Cards de perfil ---- */

.profiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.profile-card {
  background: var(--white);
  border: 1px solid var(--grey-200);
  border-radius: 12px;
  padding: 40px 32px;
  text-align: left;
  transition: border-color 0.2s;
}

.profile-card:hover {
  border-color: var(--grey-300);
}

.profile-card__icon {
  width: 48px;
  height: 48px;
  background: var(--grey-100);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.profile-card__icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--black);
}

.profile-card__title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.profile-card__desc {
  font-size: 14px;
  color: var(--grey-700);
  line-height: 1.6;
  margin-bottom: 24px;
}

.profile-card__link {
  font-size: 13px;
  font-weight: 600;
  color: var(--black);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 12px 0;
}

.profile-card__link:hover {
  gap: 10px;
}

.profile-card__link::after {
  content: '→';
}

/* ---- Features / Beneficios ---- */

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  align-items: center;
}

.features__content {
  max-width: 460px;
}

.features__tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--grey-700);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.features__title {
  font-size: 28px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.features__text {
  font-size: 15px;
  color: var(--grey-700);
  line-height: 1.7;
  margin-bottom: 32px;
}

.features__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.features__list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--grey-900);
}

.features__list li::before {
  content: '';
  width: 20px;
  height: 20px;
  min-width: 20px;
  background: var(--grey-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%231A1A1A' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.features__visual {
  background: var(--grey-100);
  border-radius: 16px;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.features__visual--placeholder {
  font-size: 13px;
  color: var(--grey-500);
  font-weight: 500;
}

/* ---- How it works (como funciona) ---- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  text-align: center;
  margin-top: 60px;
}

.step__number {
  width: 48px;
  height: 48px;
  background: var(--black);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  margin: 0 auto 20px;
}

.step__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.step__desc {
  font-size: 14px;
  color: var(--grey-700);
  line-height: 1.6;
}

/* ---- Ecosistema (visual) ---- */

.ecosystem {
  text-align: center;
  padding: 40px 0;
}

.ecosystem__diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.ecosystem__node {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 2px solid var(--grey-200);
  background: var(--white);
}

.ecosystem__node--active {
  border-color: var(--black);
}

.ecosystem__node-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--black);
}

.ecosystem__node-label {
  font-size: 14px;
  font-weight: 600;
}

.ecosystem__connector {
  width: 60px;
  height: 2px;
  background: var(--grey-300);
  position: relative;
}

.ecosystem__connector::after {
  content: '';
  position: absolute;
  right: -4px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--grey-300);
  border-top: 2px solid var(--grey-300);
  transform: rotate(45deg);
}

/* ---- Waitlist form ---- */

.waitlist {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}

.waitlist__title {
  font-size: 28px;
  margin-bottom: 12px;
}

.waitlist__subtitle {
  font-size: 15px;
  color: var(--grey-700);
  margin-bottom: 32px;
}

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

.waitlist__row {
  display: flex;
  gap: 12px;
}

.waitlist__input {
  flex: 1;
  padding: 14px 16px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--grey-200);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
  outline: none;
  transition: border-color 0.2s;
}

.waitlist__input:focus {
  border-color: var(--black);
}

.waitlist__input::placeholder {
  color: var(--grey-500);
}

.waitlist__select {
  flex: 1;
  padding: 14px 16px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--grey-200);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239B9B9B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

.waitlist__select:focus {
  border-color: var(--black);
}

.waitlist__submit {
  width: 100%;
  margin-top: 4px;
}

.waitlist__success {
  display: none;
  padding: 24px;
  background: var(--grey-100);
  border-radius: 12px;
  text-align: center;
}

.waitlist__success h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.waitlist__success p {
  font-size: 14px;
  color: var(--grey-700);
}

/* ---- Stats ---- */

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
  margin-top: 48px;
}

.stat__number {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.stat__label {
  font-size: 13px;
  color: var(--grey-700);
}

.section--dark .stat__label {
  color: var(--grey-300);
}

/* ---- Section headers ---- */

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

.section-header__tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--grey-700);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.section-header__title {
  font-size: 28px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-header__text {
  font-size: 15px;
  color: var(--grey-700);
  line-height: 1.6;
}

.section--dark .section-header__tag {
  color: var(--grey-500);
}

.section--dark .section-header__text {
  color: var(--grey-300);
}

/* ---- Footer ---- */

.footer {
  border-top: 1px solid var(--grey-200);
  padding: 48px 0;
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__logo {
  display: inline-flex;
  align-items: center;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  color: var(--black);
  text-decoration: none;
}

.footer__logo svg {
  height: 22px;
  width: auto;
}

.footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer__links a {
  font-size: 13px;
  color: var(--grey-700);
  text-decoration: none;
  padding: 12px 0;
}

.footer__links a:hover {
  color: var(--black);
}

.footer__copy {
  font-size: 12px;
  color: var(--grey-700);
}

/* ---- Page hero (subpages) ---- */

.page-hero {
  padding: 140px 0 60px;
  text-align: center;
}

.page-hero__title {
  font-size: 36px;
  margin-bottom: 16px;
}

.page-hero__subtitle {
  font-size: 18px;
  color: var(--grey-700);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---- Benefit rows ---- */

.benefit-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 64px;
  align-items: center;
  padding: 60px 0;
}

.benefit-row:not(:last-child) {
  border-bottom: 1px solid var(--grey-200);
}

.benefit-row--reverse .benefit-row__visual {
  order: -1;
}

.benefit-row__content h3 {
  font-size: 22px;
  margin-bottom: 16px;
}

.benefit-row__content p {
  font-size: 15px;
  color: var(--grey-700);
  line-height: 1.7;
  margin-bottom: 24px;
}

.benefit-row__visual {
  background: var(--grey-100);
  border-radius: 16px;
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--grey-500);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--grey-200);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__mobile-toggle {
    display: block;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero__title {
    font-size: 28px;
  }

  .hero__subtitle {
    font-size: 15px;
  }

  .profiles {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .profile-card {
    padding: 28px 24px;
  }

  .features {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .features--reverse .features__visual {
    order: -1;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .waitlist__row {
    flex-direction: column;
  }

  .benefit-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .benefit-row--reverse .benefit-row__visual {
    order: 0;
  }

  .ecosystem__diagram {
    flex-direction: column;
    gap: 24px;
  }

  .ecosystem__connector {
    width: 2px;
    height: 40px;
  }

  .ecosystem__connector::after {
    right: -4px;
    top: auto;
    bottom: -4px;
    transform: rotate(135deg);
  }

  .footer .container {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .page-hero__title {
    font-size: 28px;
  }

  .section {
    padding: 60px 0;
  }

  .section-header__title {
    font-size: 24px;
  }

  .features__title {
    font-size: 24px;
  }
}

/* ---- Dark mode ---- */

@media (prefers-color-scheme: dark) {
  :root {
    --black: #EDEDED;
    --black-light: #DADADA;
    --grey-900: #C0C0C0;
    --grey-700: #9B9B9B;
    --grey-500: #6B6B6B;
    --grey-300: #3D3D3D;
    --grey-200: #2D2D2D;
    --grey-100: #242422;
    --white: #1A1A1A;
    --warm: #1E1D1B;
  }

  .nav {
    background: rgba(26, 26, 26, 0.95);
  }

  .section--dark {
    background: #111;
    color: #EDEDED;
  }

  .section--dark .section-header__tag {
    color: #6B6B6B;
  }

  .section--dark .section-header__text {
    color: #9B9B9B;
  }

  .section--dark .stat__label {
    color: #9B9B9B;
  }

  .section--dark .waitlist__input,
  .section--dark .waitlist__select {
    background: #242422;
    color: #EDEDED;
    border-color: #3D3D3D;
  }

  .section--dark .waitlist__input:focus,
  .section--dark .waitlist__select:focus {
    border-color: #EDEDED;
  }

  .section--dark .btn--white {
    background: #EDEDED;
    color: #1A1A1A;
  }

  .section--dark .btn--white:hover {
    background: #DADADA;
  }

  .section--dark .waitlist__success {
    background: #242422;
    color: #EDEDED;
  }

  .features__list li::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23EDEDED' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  }
}