/* Aumento — promotional site */

:root {
  --ink: #0d1117;
  --ink-soft: #161b22;
  --ink-muted: #2a3340;
  --paper: #f2f4f7;
  --paper-warm: #e8ecf1;
  --fog: #9aa6b5;
  --mist: #c5ced8;
  --accent: #2dd4bf;
  --accent-deep: #14b8a6;
  --accent-soft: rgba(45, 212, 191, 0.14);
  --text-on-ink: #eef2f6;
  --text-on-paper: #121820;
  --text-muted-ink: #9aa6b5;
  --text-muted-paper: #4a5563;

  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 7rem;

  --measure: 40rem;
  --content: 68rem;
  --header-h: 4.25rem;
  --radius: 2px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration: 0.55s;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: clip;
  scroll-padding-top: calc(var(--header-h) + 0.75rem);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-on-paper);
  background: var(--paper);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 1000;
  padding: var(--space-3) var(--space-4);
  background: var(--accent);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-4);
}

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  transition: background-color 0.3s var(--ease-out),
    border-color 0.3s var(--ease-out), backdrop-filter 0.3s var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(13, 17, 23, 0.88);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  max-width: var(--content);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-on-ink);
  text-decoration: none;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--mist);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--text-on-ink);
}

.site-nav .btn {
  color: var(--ink);
}

.site-nav .btn:hover {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
  color: var(--text-on-ink);
  cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 1.15rem;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  transition: transform 0.25s var(--ease-out), opacity 0.2s ease;
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before {
  top: -6px;
}

.nav-toggle__bars::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1.35rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease,
    color 0.2s ease, transform 0.2s var(--ease-out);
}

.btn--small {
  min-height: 2.4rem;
  padding: 0.45rem 1rem;
  font-size: 0.9rem;
}

.btn--primary {
  background: var(--accent);
  color: var(--ink);
}

.btn--primary:hover {
  background: var(--accent-deep);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--text-on-ink);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Hero */

.hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: 100svh;
  color: var(--text-on-ink);
  overflow: hidden;
}

.hero__media {
  position: absolute;
  inset: 0;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  transform: scale(1.04);
  transition: transform 1.4s var(--ease-out);
}

.hero.is-ready .hero__image {
  transform: scale(1);
}

.hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      rgba(13, 17, 23, 0.55) 0%,
      rgba(13, 17, 23, 0.35) 35%,
      rgba(13, 17, 23, 0.82) 72%,
      rgba(13, 17, 23, 0.96) 100%
    ),
    linear-gradient(
      90deg,
      rgba(13, 17, 23, 0.55) 0%,
      rgba(13, 17, 23, 0.15) 55%,
      rgba(13, 17, 23, 0.35) 100%
    );
}

.hero__content {
  position: relative;
  z-index: 1;
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: calc(var(--header-h) + var(--space-8)) var(--space-5) var(--space-8);
}

.hero__brand {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 7vw + 0.35rem, 6.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.055em;
  color: var(--text-on-ink);
  max-width: 100%;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(1.25rem);
}

@media (max-width: 720px) {
  .hero__brand {
    /* Keep "Aumento.AI" inside the padded column on phones/tablets */
    font-size: min(3.25rem, calc((100vw - 3.5rem) / 9.6));
    letter-spacing: -0.06em;
  }
}

.hero__headline {
  max-width: 18ch;
  margin: 0 0 var(--space-5);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.2vw, 2.15rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--mist);
  opacity: 0;
  transform: translateY(1.25rem);
}

.hero__lede {
  max-width: 36rem;
  margin: 0 0 var(--space-6);
  color: var(--fog);
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  opacity: 0;
  transform: translateY(1.25rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  opacity: 0;
  transform: translateY(1.25rem);
}

.hero.is-ready .hero__brand,
.hero.is-ready .hero__headline,
.hero.is-ready .hero__lede,
.hero.is-ready .hero__actions {
  opacity: 1;
  transform: none;
  transition: opacity var(--duration) var(--ease-out),
    transform var(--duration) var(--ease-out);
}

.hero.is-ready .hero__headline {
  transition-delay: 0.08s;
}

.hero.is-ready .hero__lede {
  transition-delay: 0.16s;
}

.hero.is-ready .hero__actions {
  transition-delay: 0.24s;
}

/* Sections */

.section {
  padding: var(--space-9) 0;
}

.section__inner {
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section__inner--narrow {
  max-width: 46rem;
}

.section__header {
  max-width: 40rem;
  margin-bottom: var(--space-7);
}

.section__header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.5vw, 2.65rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section__lede {
  max-width: 36rem;
  margin: var(--space-4) 0 0;
  color: var(--text-muted-paper);
}

.section__lede a {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.section__lede a:hover {
  color: var(--text-on-paper);
}

.section__lede strong {
  color: var(--text-on-paper);
  font-weight: 600;
}

.eyebrow {
  margin: 0 0 var(--space-3);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.eyebrow--on-ink {
  color: var(--accent);
}

.section--paper {
  background: var(--paper);
  color: var(--text-on-paper);
}

.section--ink {
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, var(--accent-soft), transparent 55%),
    var(--ink);
  color: var(--text-on-ink);
}

.section--ink .section__header h2 {
  color: var(--text-on-ink);
}

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

/* Offerings — typographic, not cards */

.offerings {
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(18, 24, 32, 0.12);
}

.offering {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-6) 0;
  border-bottom: 1px solid rgba(18, 24, 32, 0.12);
}

@media (min-width: 720px) {
  .offering {
    grid-template-columns: minmax(12rem, 0.42fr) 1fr;
    gap: var(--space-6);
    align-items: baseline;
  }
}

.offering__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.offering__detail {
  display: grid;
  gap: var(--space-4);
}

.offering__body {
  margin: 0;
  max-width: 38rem;
  color: var(--text-muted-paper);
}

.offering__items {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.offering__items li {
  position: relative;
  max-width: 38rem;
  padding-left: var(--space-5);
  color: var(--text-muted-paper);
  font-size: 1.05rem;
}

.offering__items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.75rem;
  height: 2px;
  background: var(--accent-deep);
}

.offering__items strong {
  color: var(--text-on-paper);
  font-weight: 600;
}

/* Vision prose */

.prose {
  display: grid;
  gap: var(--space-5);
}

.prose p {
  margin: 0;
  max-width: var(--measure);
  font-size: 1.2rem;
  color: var(--mist);
}

.prose p:first-child {
  color: var(--text-on-ink);
}

.prose a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.prose a:hover {
  color: var(--text-on-ink);
}

/* Contact */

.contact {
  display: grid;
  gap: var(--space-7);
}

@media (min-width: 860px) {
  .contact {
    grid-template-columns: minmax(0, 34rem) 1fr;
    gap: var(--space-8);
    align-items: start;
  }
}

.contact-form {
  display: grid;
  gap: var(--space-4);
}

.contact-form__honey {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.contact-form__row {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 560px) {
  .contact-form__row {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-form__field {
  display: grid;
  gap: var(--space-2);
}

.contact-form__field span {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted-paper);
}

.contact-form__field input,
.contact-form__field textarea {
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  background: #fff;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-on-paper);
  transition: border-color 0.2s ease;
}

.contact-form__field textarea {
  resize: vertical;
  min-height: 8rem;
}

.contact-form__field input:focus-visible,
.contact-form__field textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: var(--accent);
}

.contact-form .btn {
  justify-self: start;
}

.contact-form .btn[disabled] {
  opacity: 0.6;
  cursor: default;
}

.contact-form__status {
  min-height: 1.5rem;
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted-paper);
}

.contact-form__status.is-success {
  color: var(--accent-deep);
  font-weight: 600;
}

.contact-form__status.is-error {
  color: #b3261e;
  font-weight: 600;
}

.contact__aside {
  display: grid;
  gap: var(--space-2);
  align-content: start;
}

.contact__place {
  margin: 0;
  color: var(--text-muted-paper);
}

.contact__link {
  width: fit-content;
  color: var(--text-muted-paper);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.contact__link:hover {
  color: var(--text-on-paper);
}

/* Inner pages (cursos) */

.page-inner .site-header {
  background: rgba(13, 17, 23, 0.92);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
}

.page-inner main {
  padding-top: var(--header-h);
  min-height: 70vh;
}

.btn--ghost-on-paper {
  border-color: rgba(18, 24, 32, 0.25);
  color: var(--text-on-paper);
}

.btn--ghost-on-paper:hover {
  border-color: var(--accent-deep);
  color: var(--accent-deep);
}

/* Courses listing */

.courses h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.5vw, 2.65rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.course-list {
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(18, 24, 32, 0.12);
}

.course-list__item {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-6) 0;
  border-bottom: 1px solid rgba(18, 24, 32, 0.12);
}

.course-list__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.course-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.course-status {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted-paper);
}

.course-status--open {
  color: var(--accent-deep);
}

.course-status--on-ink {
  color: var(--fog);
}

.course-status--on-ink.course-status--open,
.course-list__meta .course-status--open.course-status--on-ink {
  color: var(--accent);
}

.course-modules {
  display: grid;
  gap: var(--space-5);
}

.course-module {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid rgba(18, 24, 32, 0.1);
}

.course-module:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.course-module h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.course-module__focus {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-deep);
}

.course-module p {
  margin: 0;
  color: var(--text-muted-paper);
  max-width: var(--measure);
}

.course-list__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.course-list__title a {
  color: var(--text-on-paper);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.course-list__title a:hover {
  color: var(--accent-deep);
  border-bottom-color: var(--accent-deep);
}

.course-list__desc {
  margin: 0;
  max-width: 38rem;
  color: var(--text-muted-paper);
}

.courses__cta {
  margin-top: var(--space-7);
  display: grid;
  gap: var(--space-4);
}

.courses__cta p {
  margin: 0;
  color: var(--text-muted-paper);
}

.courses__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Course detail page */

.course-page__hero {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.course-page__hero h1 {
  margin: var(--space-4) 0 var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-on-ink);
}

.course-page__lede {
  margin: 0;
  max-width: 36rem;
  font-size: 1.15rem;
  color: var(--mist);
}

.course-page__back {
  margin: 0 0 var(--space-5);
}

.course-page__back a {
  color: var(--fog);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.course-page__back a:hover {
  color: var(--accent);
}

.course-page__body {
  display: grid;
  gap: var(--space-7);
}

.course-block h2 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.course-block p {
  margin: 0;
  color: var(--text-muted-paper);
  max-width: var(--measure);
}

.course-learn {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.course-learn li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--text-muted-paper);
  max-width: var(--measure);
}

.course-learn li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.75rem;
  height: 2px;
  background: var(--accent-deep);
}

.course-format {
  display: grid;
  gap: var(--space-4);
  margin: 0;
}

.course-format div {
  display: grid;
  gap: var(--space-1);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(18, 24, 32, 0.1);
}

.course-format dt {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted-paper);
}

.course-format dd {
  margin: 0;
  color: var(--text-on-paper);
  font-weight: 500;
}

.course-page__cta {
  display: grid;
  gap: var(--space-4);
  padding-top: var(--space-2);
}

.course-page__cta p {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-on-paper);
}

.course-block a {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.course-block a:hover {
  color: var(--text-on-paper);
}

/* About / Carlos */

.about__hero {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.about__intro {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 720px) {
  .about__intro {
    grid-template-columns: minmax(10rem, 14rem) 1fr;
    gap: var(--space-7);
  }
}

.about__portrait img {
  width: 100%;
  max-width: 14rem;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 2px;
}

.about__lead h1 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-on-ink);
}

.about__role {
  margin: 0 0 var(--space-4);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
}

.about__summary {
  margin: 0 0 var(--space-5);
  max-width: 36rem;
  color: var(--mist);
  font-size: 1.1rem;
}

.about__links {
  margin: 0;
}

.contact__link--on-ink {
  color: var(--mist);
}

.contact__link--on-ink:hover {
  color: var(--accent);
}

.about__body {
  display: grid;
  gap: var(--space-7);
}

/* WhatsApp floating button */

.whatsapp-fab {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 90;
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 6px 20px rgba(13, 17, 23, 0.35);
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s ease;
}

.whatsapp-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(13, 17, 23, 0.4);
}

/* Footer */

.site-footer {
  background: var(--ink);
  color: var(--text-muted-ink);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: min(100%, var(--content));
  margin: 0 auto;
  padding: var(--space-5);
}

.site-footer__brand,
.site-footer__copy {
  margin: 0;
  font-size: 0.9rem;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--mist);
}

/* Reveal on scroll */

.reveal {
  opacity: 0;
  transform: translateY(1.1rem);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}

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

/* Mobile nav */

@media (max-width: 800px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    padding: var(--space-5);
    background: rgba(13, 17, 23, 0.96);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
  }

  .site-nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .site-nav .btn {
    width: 100%;
  }
}

@media (min-width: 801px) {
  .site-nav {
    display: block !important;
  }
}

/* Mobile-friendly refinements */

@media (max-width: 800px) {
  body {
    font-size: 1.0625rem;
  }

  .wordmark {
    font-size: 1.15rem;
    letter-spacing: -0.04em;
  }

  .section {
    padding: var(--space-7) 0;
  }

  .section__header {
    margin-bottom: var(--space-6);
  }

  .section__header h2 {
    font-size: clamp(1.55rem, 6.2vw, 2.1rem);
  }

  .hero__content {
    padding: calc(var(--header-h) + var(--space-6)) var(--space-4) var(--space-6);
  }

  .section__inner,
  .site-header__inner,
  .site-footer__inner {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .hero__headline {
    max-width: none;
    font-size: clamp(1.25rem, 5.2vw, 1.55rem);
  }

  .hero__lede {
    font-size: 1.05rem;
  }

  .hero__actions {
    width: 100%;
  }

  .hero__actions .btn {
    flex: 1 1 calc(50% - var(--space-3));
    min-width: 8.5rem;
  }

  .offering {
    padding: var(--space-5) 0;
  }

  .offering__title {
    font-size: 1.25rem;
  }

  .offering__items li {
    font-size: 1rem;
  }

  .prose p {
    font-size: 1.05rem;
  }

  .contact-form__field input,
  .contact-form__field textarea {
    width: 100%;
    min-width: 0;
    font-size: 1rem; /* avoids iOS zoom on focus */
  }

  .contact-form .btn {
    width: 100%;
    justify-self: stretch;
  }

  .whatsapp-fab {
    right: max(var(--space-4), env(safe-area-inset-right));
    bottom: max(var(--space-4), env(safe-area-inset-bottom));
  }

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

  .course-list__item {
    padding: var(--space-5) 0;
  }

  .courses__actions {
    width: 100%;
  }

  .courses__actions .btn {
    flex: 1 1 auto;
    min-width: 8.5rem;
  }

  .course-page__hero {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
  }
}

/* Newsletter */

.newsletter-masthead {
  padding-top: var(--space-8);
  padding-bottom: var(--space-7);
}

.newsletter-masthead__brand {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text-on-ink);
}

.newsletter-masthead__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.newsletter-masthead__lede {
  max-width: 32rem;
  margin: var(--space-4) 0 0;
  color: var(--fog);
  font-size: 1.1rem;
}

.newsletter {
  padding-top: var(--space-8);
}

.newsletter__status {
  margin: 0;
  color: var(--text-muted-paper);
}

.newsletter__status.is-error {
  color: #b42318;
}

.newsletter__header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid rgba(18, 24, 32, 0.12);
}

.newsletter__date {
  margin: 0 0 var(--space-3);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: capitalize;
  color: var(--accent-deep);
}

.newsletter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.2vw, 2.35rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.newsletter__body {
  display: grid;
  gap: var(--space-5);
}

.newsletter__body p {
  margin: 0;
  max-width: 40rem;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-on-paper);
}

.newsletter__body p:first-child {
  font-size: 1.25rem;
  color: var(--text-on-paper);
}

.newsletter__body a,
.newsletter__numbered a,
.newsletter__link-list a {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  word-break: break-word;
}

.newsletter__body a:hover,
.newsletter__numbered a:hover,
.newsletter__link-list a:hover {
  color: var(--text-on-paper);
}

.newsletter__numbered {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-4);
  max-width: 40rem;
  counter-reset: nl;
}

.newsletter__numbered li {
  position: relative;
  padding-left: 2rem;
  color: var(--text-muted-paper);
  font-size: 1.08rem;
  line-height: 1.65;
  counter-increment: nl;
}

.newsletter__numbered li::before {
  content: counter(nl) ".";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--accent-deep);
}

.newsletter__links {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(18, 24, 32, 0.12);
}

.newsletter__links-title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.newsletter__link-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
  max-width: 40rem;
}

.newsletter__link-list li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--text-muted-paper);
  font-size: 1.05rem;
  line-height: 1.5;
}

.newsletter__link-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.75rem;
  height: 2px;
  background: var(--accent-deep);
}

.newsletter__signoff {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(18, 24, 32, 0.12);
}

.newsletter__signature {
  display: grid;
  gap: var(--space-1);
}

.newsletter__signature-mark {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--accent-deep);
}

.newsletter__signature-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.newsletter__signature-role {
  margin: 0;
  color: var(--text-muted-paper);
  font-size: 1rem;
}

.newsletter__signature-role a {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.newsletter__signature-role a:hover {
  color: var(--text-on-paper);
}

.newsletter__signature-note {
  margin: var(--space-2) 0 0;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--text-muted-paper);
}

.newsletter__archive {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(18, 24, 32, 0.12);
}

.newsletter__archive-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.newsletter__archive-lede {
  margin: var(--space-2) 0 var(--space-4);
  color: var(--text-muted-paper);
  font-size: 0.95rem;
}

.newsletter__archive-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(18, 24, 32, 0.1);
}

.newsletter__archive-list li {
  border-bottom: 1px solid rgba(18, 24, 32, 0.1);
}

.newsletter__archive-list a {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4) 0;
  text-decoration: none;
  color: inherit;
}

.newsletter__archive-list a:hover .newsletter__archive-label {
  color: var(--accent-deep);
}

.newsletter__archive-date {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.newsletter__archive-label {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-on-paper);
  transition: color 0.2s var(--ease-out);
}

.newsletter__archive-feed {
  margin: var(--space-4) 0 0;
  font-size: 0.9rem;
}

.newsletter__archive-feed a {
  color: var(--accent-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.newsletter__archive-feed a:hover {
  color: var(--text-on-paper);
}

@media (max-width: 380px) {
  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    flex: 1 1 auto;
    width: 100%;
  }
}