/* Humboldt Expedition — landing page styles
   Field-journal aesthetic: parchment, ink, deep forest green. */

:root {
  --paper: #f5efe1;
  --paper-deep: #ece2cb;
  --ink: #2d2921;
  --ink-soft: #5f5745;
  --line: #d6c9a8;
  --green: #2f4f3e;
  --green-deep: #24382e;
  --green-soft: #4a6b57;
  --accent: #b3562e;
  --gold: #b98a2f;

  /* App chrome, mirrored from the Flutter app's binder palette */
  --binder: #1a1205;
  --binder-gold: #c9a84c;
  --app-ink: #3a2a0a;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --font-hand: "Caveat", cursive;
  --font-caps: "OldScientificIllustrationCaps", "Fraunces", Georgia, serif;

  --radius: 10px;
  --wrap: 68rem;
}

/* The app's illustrated capitals (A–Z ornate, a–z as scaled small caps).
   Missing glyphs (umlauts, digits, most punctuation) fall back to Fraunces. */
@font-face {
  font-family: "OldScientificIllustrationCaps";
  src: url("fonts/OldScientificIllustrationCaps.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  /* subtle paper grain */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.2 0 0 0 0 0.16 0 0 0 0 0.1 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2.4rem, 6vw, 3.8rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; }

a { color: var(--green); }

.lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 34em;
}

.eyebrow {
  font-family: var(--font-hand);
  font-size: 1.35rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

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

.section-head { max-width: 44rem; margin-bottom: 2.5rem; }
.section-head--light h2 { color: var(--paper); }
.section-head--light .lead { color: var(--paper-deep); }

.icon {
  width: 2rem;
  height: 2rem;
  stroke: var(--green);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  border: 1.5px solid var(--ink);
  border-radius: var(--radius);
  padding: 0.65rem 1.2rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.btn:hover { transform: translateY(-2px); box-shadow: 0 3px 0 var(--ink); }

.btn--primary {
  background: var(--green);
  border-color: var(--green-deep);
  color: var(--paper);
}
.btn--primary:hover { box-shadow: 0 3px 0 var(--green-deep); }

.btn--small { padding: 0.45rem 1rem; font-size: 0.95rem; }

.btn--store {
  background: var(--ink);
  color: var(--paper);
  padding: 0.55rem 1.3rem;
}
.btn--store svg { width: 1.6rem; height: 1.6rem; fill: currentColor; }
.btn--store span { display: flex; flex-direction: column; line-height: 1.15; }
.btn--store small { font-size: 0.7rem; font-weight: 400; opacity: 0.8; }
.btn--store:hover { box-shadow: 0 3px 0 var(--green-deep); }

.store-buttons { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.6rem; }
.store-buttons--center { justify-content: center; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-block: 0.7rem;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  margin-left: auto;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.lang-switch a {
  color: inherit;
  text-decoration: none;
}

.lang-switch a:hover,
.lang-switch a[aria-current="page"] {
  color: var(--green);
}

.lang-switch a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  white-space: nowrap;
}
.wordmark em { font-style: italic; font-weight: 400; color: var(--green); }
.wordmark__rose {
  width: 1.9rem;
  height: 1.9rem;
  stroke: var(--accent);
  fill: var(--accent);
  stroke-width: 1.5;
}

.site-nav {
  display: flex;
  gap: 1.4rem;
  margin-left: auto;
}
.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.98rem;
}
.site-nav a:hover { color: var(--green); }

@media (max-width: 40rem) {
  .site-nav { display: none; }
  .site-header__inner { justify-content: space-between; }
}

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

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero__rose {
  position: absolute;
  top: -6rem;
  right: -6rem;
  width: 26rem;
  height: 26rem;
  stroke: var(--ink);
  fill: var(--ink);
  stroke-width: 0.6;
  opacity: 0.06;
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 3rem;
  padding-block: 5rem 5.5rem;
}

.hero__note { color: var(--ink-soft); font-size: 0.9rem; margin-top: 0.9rem; }

@media (max-width: 52rem) {
  .hero__inner { grid-template-columns: 1fr; padding-block: 3rem; }
  .hero__art { justify-self: center; }
}

/* Species detail page mockup — mirrors the app's Bestiarium detail screen:
   dark binder chrome, gold title, parchment page, mounted colour plate. */

.hero__art {
  width: min(17.5rem, 78vw);
  margin-inline: auto;
}

.phone {
  background: var(--binder);
  border-radius: 30px;
  padding: 0.5rem 0.5rem 0.6rem;
  box-shadow: 0 18px 44px rgba(45, 41, 33, 0.3);
  transform: rotate(1.6deg);
}

.phone__bar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.55rem 0.55rem 0.7rem;
  color: var(--binder-gold);
  font-weight: 700;
  font-size: 1.02rem;
}

.phone__back { font-size: 1.15rem; line-height: 1; }

.phone__page {
  background: var(--paper);
  border-radius: 6px 6px 24px 24px;
  padding: 0.8rem 0.85rem 1.1rem;
}

.phone__plate {
  background: #fdfaf0;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.45rem;
}

.phone__plate img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.phone__name {
  font-family: var(--font-caps);
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--app-ink);
  margin: 0.85rem 0 0;
}

.phone__latin {
  font-family: var(--font-hand);
  font-size: 1.2rem;
  color: var(--ink-soft);
  margin: 0.05rem 0 0.55rem;
}

.phone__desc {
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 0.75rem;
}

.phone__fields {
  margin: 0;
  font-size: 0.8rem;
  display: grid;
  gap: 0.3rem;
}

.phone__fields div {
  display: grid;
  grid-template-columns: 5.2rem 1fr;
  gap: 0.5rem;
}

.phone__fields dt { font-weight: 600; color: var(--ink); }
.phone__fields dd { margin: 0; color: var(--ink-soft); }

/* --------------------------- How it works --------------------------- */

.how { padding-block: 5rem; }

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  counter-reset: step;
}

.step {
  position: relative;
  background: color-mix(in srgb, var(--paper-deep) 55%, var(--paper));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem 1.4rem 1.2rem;
}

.step__num {
  position: absolute;
  top: -0.9rem;
  left: 1.2rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1rem;
  background: var(--green);
  color: var(--paper);
  border-radius: 999px;
  padding: 0.1rem 0.75rem;
}

.step .icon { margin-bottom: 0.7rem; }
.step h3 { margin-bottom: 0.4em; }
.step p { color: var(--ink-soft); margin: 0; }

@media (max-width: 52rem) {
  .steps { grid-template-columns: 1fr; }
}

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

.features {
  padding-block: 5rem;
  background: var(--paper-deep);
  border-block: 1px solid var(--line);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
}

.feature .icon { margin-bottom: 0.8rem; }
.feature h3 { margin-bottom: 0.4em; }
.feature p { color: var(--ink-soft); margin: 0; font-size: 0.98rem; }

@media (max-width: 52rem) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* ----------------------------- Showcase ----------------------------- */

.showcase {
  padding-block: 5rem;
  background: var(--green-deep);
  color: var(--paper);
}

.showcase__plates {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.plate {
  margin: 0;
  background: var(--paper);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 1.2rem;
  width: min(17rem, 80vw);
  text-align: center;
}

.plate__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--line);
}

.plate figcaption {
  margin-top: 0.8rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.plate__tag {
  display: inline-block;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--paper);
  background: var(--ink-soft);
  border-radius: 999px;
  padding: 0.1rem 0.7rem;
  margin-right: 0.5rem;
}

.plate__tag--gold { background: var(--gold); }

.showcase__arrow {
  font-size: 2.2rem;
  color: var(--paper-deep);
}

@media (max-width: 40rem) {
  .showcase__arrow { transform: rotate(90deg); }
}

/* ----------------------------- Panorama ----------------------------- */

.panorama { padding-block: 5rem 0; }

.panorama__plate {
  margin: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 0.9rem 0.6rem;
}

.panorama__plate img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--line);
}

.panorama__plate figcaption {
  margin-top: 0.55rem;
  text-align: center;
  font-family: var(--font-hand);
  font-size: 1.3rem;
  color: var(--ink-soft);
}

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

.cta {
  padding-block: 5.5rem;
  text-align: center;
}

.cta .lead { margin-inline: auto; }

/* --------------------------- Article pages --------------------------- */

.page { padding-block: 3.5rem 5rem; }

.page__article { max-width: 44rem; }

.page__article h2 {
  font-size: 1.35rem;
  margin-top: 2.2rem;
}

.page__article h3 {
  font-size: 1.1rem;
  margin-top: 1.6rem;
}

.page__article ol,
.page__article ul {
  padding-left: 1.3rem;
  color: var(--ink-soft);
}

.page__article li { margin-bottom: 0.5rem; }

.page__meta {
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

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

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
  padding-block: 2rem;
}

.site-footer__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.wordmark--footer { font-size: 1rem; }

.site-footer nav { display: flex; gap: 1.2rem; margin-left: auto; }
.site-footer nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
}
.site-footer nav a:hover { color: var(--green); }

.site-footer__legal {
  width: 100%;
  margin: 0.5rem 0 0;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

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

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms ease, transform 500ms ease;
}

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

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

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