/* Edutecnik — sitio público. Tokens alineados con la app (ink scale, pill buttons, hairlines). */

:root {
  color-scheme: light;

  --ink-900: #1d1d1f;
  --ink-700: #424245;
  --ink-600: #6e6e73;
  --ink-500: #86868b;
  --ink-400: #aeaeb2;
  --ink-300: #c7c7cc;
  --ink-200: #d2d2d7;
  --ink-100: #e8e8ed;
  --ink-50: #f5f5f7;

  --surface: #ffffff;
  --surface-muted: #fbfbfd;
  --hairline: rgba(0, 0, 0, 0.08);

  --brand: #0071e3;
  --ai: #5856d6;

  --maxw: 1180px;
  --gutter: 24px;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-pop: 0 8px 40px rgba(0, 0, 0, 0.1), 0 2px 8px rgba(0, 0, 0, 0.05);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui,
    'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

@media (min-width: 640px) {
  :root {
    --gutter: 40px;
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink-900);
  font-feature-settings: 'kern' 1, 'liga' 1;
  line-height: 1.5;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
ul,
ol {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

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

:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px rgba(0, 0, 0, 0.25);
  border-radius: 8px;
}

::selection {
  background: var(--ink-900);
  color: #fff;
}

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

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: 72px;
  border-top: 1px solid var(--ink-100);
}

@media (min-width: 768px) {
  .section {
    padding-block: 104px;
  }
}

.section--muted {
  background: var(--surface-muted);
}

.section--plain {
  border-top: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 100;
  background: var(--ink-900);
  color: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
}

.skip-link:focus {
  left: 16px;
}

/* ---------- Typography ---------- */

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-600);
}

.display {
  font-size: clamp(2.6rem, 7.2vw, 4.4rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.03;
}

.display .muted,
.h2 .muted {
  color: var(--ink-500);
}

.h2 {
  font-size: clamp(1.9rem, 4.2vw, 2.9rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.lead {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.7;
  color: var(--ink-600);
}

.body {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-600);
}

.fine {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-600);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 980px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  letter-spacing: -0.01em;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
    transform 0.15s var(--ease), color 0.2s var(--ease);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--ink-900);
  color: #fff;
}

.btn--primary:hover {
  background: var(--ink-700);
}

.btn--secondary {
  background: var(--surface);
  border-color: var(--ink-200);
  color: var(--ink-900);
}

.btn--secondary:hover {
  border-color: var(--ink-400);
}

.btn--sm {
  padding: 9px 18px;
  font-size: 13.5px;
}

.btn .arrow {
  transition: transform 0.2s var(--ease);
}

.btn:hover .arrow {
  transform: translateX(2px);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Header ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease);
}

.header[data-scrolled='true'] {
  border-bottom-color: var(--ink-100);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.brand__mark {
  height: 34px;
  width: auto;
  flex: none;
  display: block;
  object-fit: contain;
}
.brand__name {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.025em;
}
.eyebrow--brand {
  text-transform: none;
  letter-spacing: 0;
  font-size: 20px;
  font-weight: 600;
}

.brand__sub {
  color: var(--ink-400);
  font-weight: 500;
}

.nav {
  display: none;
  align-items: center;
  gap: 28px;
}

@media (min-width: 940px) {
  .nav {
    display: flex;
  }
}

.nav a {
  font-size: 13.5px;
  color: var(--ink-600);
  transition: color 0.15s var(--ease);
}

.nav a:hover {
  color: var(--ink-900);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.header .brand {
  min-width: 0;
}

.header__actions > * {
  flex: none;
}

.header .btn--primary {
  display: none;
}

/* El CTA vuelve en cuanto cabe junto a la marca y el selector de idioma. */
@media (min-width: 360px) {
  .header .btn--primary {
    display: inline-flex;
  }
}

@media (max-width: 639px) {
  .header__inner {
    gap: 10px;
  }
  .header__actions {
    gap: 8px;
  }
  .header .btn--sm {
    padding: 8px 13px;
    font-size: 13px;
  }
  .lang button {
    padding: 5px 9px;
  }
}

/* Language toggle — segmented control */

.lang {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border-radius: 980px;
  background: var(--ink-50);
}

.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-500);
  padding: 5px 11px;
  border-radius: 980px;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.lang button[aria-pressed='true'] {
  background: var(--surface);
  color: var(--ink-900);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

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

.hero {
  padding-block: 64px 72px;
}

@media (min-width: 768px) {
  .hero {
    padding-block: 96px 112px;
  }
}

.hero__grid {
  display: grid;
  gap: 56px;
  align-items: center;
}

@media (min-width: 1000px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 64px;
  }
}

.hero__title {
  margin-top: 20px;
}

.hero__lead {
  margin-top: 26px;
  max-width: 46ch;
}

.hero__ctas {
  margin-top: 32px;
}

.hero__fine {
  margin-top: 16px;
}

/* ---------- Product glimpse card ---------- */

.glimpse {
  border: 1px solid var(--ink-100);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow-pop);
  overflow: hidden;
}

.glimpse__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--ink-100);
  background: var(--surface-muted);
}

.glimpse__dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--ink-200);
}

.glimpse__url {
  margin-left: 6px;
  font-size: 11.5px;
  color: var(--ink-400);
  letter-spacing: -0.01em;
}

.glimpse__body {
  padding: 24px;
}

@media (min-width: 480px) {
  .glimpse__body {
    padding: 28px;
  }
}

.glimpse__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.glimpse__course {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 980px;
  background: var(--ink-50);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-600);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.pill--accent {
  background: rgba(0, 113, 227, 0.08);
  color: var(--brand);
}

.pill__dot {
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: currentColor;
}

.glimpse__rows {
  margin-top: 22px;
  display: grid;
  gap: 1px;
  background: var(--ink-100);
  border: 1px solid var(--ink-100);
  border-radius: 14px;
  overflow: hidden;
}

.grow {
  background: var(--surface);
  padding: 14px 16px;
}

.grow__label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-400);
}

.grow__value {
  margin-top: 5px;
  font-size: 14px;
  color: var(--ink-900);
  letter-spacing: -0.015em;
}

.grow__value .sep {
  color: var(--ink-300);
  padding-inline: 6px;
}

.meter {
  margin-top: 9px;
  height: 4px;
  border-radius: 999px;
  background: var(--ink-100);
  overflow: hidden;
}

.meter__fill {
  display: block;
  height: 100%;
  width: 57%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand), var(--ai));
}

.glimpse__foot {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------- Section headings ---------- */

.section__head {
  max-width: 62ch;
}

.section__head .h2 {
  margin-top: 16px;
}

.section__head .lead {
  margin-top: 20px;
}

/* ---------- Card grids ---------- */

.grid {
  display: grid;
  gap: 20px;
  margin-top: 44px;
}

.grid--3 {
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

@media (min-width: 820px) {
  .grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--ink-100);
  border-radius: 20px;
  padding: 26px;
}

@media (min-width: 640px) {
  .card {
    padding: 30px;
  }
}

.card__icon {
  display: inline-flex;
  padding: 10px;
  border-radius: 13px;
  background: var(--ink-50);
  color: var(--ink-700);
  margin-bottom: 20px;
}

.card .h3 {
  letter-spacing: -0.02em;
}

.card .body {
  margin-top: 9px;
}

.card__list {
  margin-top: 18px;
  display: grid;
  gap: 9px;
}

.card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-600);
}

.card__list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: var(--ink-300);
}

.card--door {
  display: flex;
  flex-direction: column;
}

.card__badge {
  align-self: flex-start;
  margin-bottom: 20px;
}

.card__doorlabel {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-400);
  margin-bottom: 10px;
}

/* ---------- Steps ---------- */

.steps {
  display: grid;
  gap: 0;
  margin-top: 44px;
  border-top: 1px solid var(--ink-100);
}

@media (min-width: 900px) {
  .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    background: var(--ink-100);
  }
}

.step {
  background: var(--surface);
  padding: 26px 0;
  border-bottom: 1px solid var(--ink-100);
}

@media (min-width: 900px) {
  .step {
    padding: 30px 26px 30px 0;
    border-bottom: 0;
  }
  .step:not(:first-child) {
    padding-left: 26px;
  }
}

.step__n {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-300);
  letter-spacing: -0.01em;
}

.step .h3 {
  margin-top: 12px;
}

.step .body {
  margin-top: 8px;
}

/* ---------- Roles ---------- */

.roles {
  margin-top: 44px;
  border-top: 1px solid var(--ink-100);
}

.role {
  display: grid;
  gap: 6px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ink-100);
}

@media (min-width: 760px) {
  .role {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr);
    gap: 32px;
    align-items: baseline;
    padding: 26px 0;
  }
}

.role__name {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* ---------- Trust ---------- */

.trust {
  display: grid;
  gap: 1px;
  margin-top: 44px;
  background: var(--ink-100);
  border: 1px solid var(--ink-100);
  border-radius: 20px;
  overflow: hidden;
}

@media (min-width: 700px) {
  .trust {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .trust {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.trust__item {
  background: var(--surface);
  padding: 26px;
}

.trust__item .body {
  margin-top: 8px;
}

.notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid var(--ink-100);
  border-radius: 16px;
  background: var(--surface);
}

.notice svg {
  flex: none;
  margin-top: 2px;
  color: var(--ink-400);
}

/* ---------- Final CTA ---------- */

.closer {
  text-align: center;
  max-width: 44ch;
  margin-inline: auto;
}

.closer .lead {
  margin-top: 20px;
}

.closer .cta-row {
  margin-top: 32px;
  justify-content: center;
}

.closer .fine {
  margin-top: 18px;
}

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

.footer {
  border-top: 1px solid var(--ink-100);
  padding-block: 40px 48px;
  background: var(--surface);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  align-items: center;
  justify-content: space-between;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer__links a {
  font-size: 13px;
  color: var(--ink-600);
  transition: color 0.15s var(--ease);
}

.footer__links a:hover {
  color: var(--ink-900);
}

.footer__legal {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--ink-100);
}

/* ---------- Reveal on scroll ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn,
  .btn .arrow {
    transition: none;
  }
}