/* ================================
   Design Tokens
   ================================ */
:root {
  --color-cream: #F7F3EC;
  --color-cream-dark: #EDE6D8;
  --color-gold: #C8973E;
  --color-gold-dark: #9A7430;
  --color-gold-light: #E8D5A8;
  --color-gold-dim: rgba(200, 151, 62, 0.2);
  --color-green-deep: #0F1F17;
  --color-green: #1B3528;
  --color-green-mid: #2D5A3D;
  --color-terra: #C75B3A;
  --color-text: #1E1E1E;
  --color-text-muted: #6B6560;
  --color-text-light: #F0E8D8;

  --font-display: 'Young Serif', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;

  --container: 1200px;
  --gap: clamp(1.5rem, 4vw, 3rem);
  --section-gap: clamp(5rem, 12vw, 8rem);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-cream);
}

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

a {
  color: inherit;
}

ul {
  list-style: none;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
}

fieldset {
  border: none;
}

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

/* ================================
   Utilities
   ================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5em 1em;
  background: var(--color-green);
  color: var(--color-text-light);
  z-index: 200;
  font-size: 0.875rem;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.5rem;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gap);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 3rem;
  color: var(--color-green);
}

.section-title--light {
  color: var(--color-text-light);
}

/* ================================
   Button
   ================================ */
.button {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 1em 2.5em;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  background: transparent;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.button:hover {
  background: var(--color-gold);
  color: var(--color-cream);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(200, 151, 62, 0.25);
}

.button:active {
  transform: translateY(0);
  box-shadow: none;
}

.button--on-dark {
  border-color: var(--color-gold-light);
  color: var(--color-gold-light);
}

.button--on-dark:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-green);
}

.button--submit {
  padding: 1.1em 3.5em;
  font-size: 0.875rem;
}

/* ================================
   Nav
   ================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 0;
  transition: background 0.4s ease, padding 0.4s ease, box-shadow 0.4s ease;
}

.nav--scrolled {
  background: rgba(247, 243, 236, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem 0;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gap);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-text-light);
  text-decoration: none;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  transition: color 0.4s ease, text-shadow 0.4s ease;
}

.nav--scrolled .nav__logo {
  text-shadow: none;
}

.nav--scrolled .nav__logo {
  color: var(--color-text);
}

.nav__cta {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-gold-light);
  border: 1px solid rgba(232, 213, 168, 0.5);
  padding: 0.65em 1.5em;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  transition: all 0.3s ease;
}

.nav__cta:hover {
  background: var(--color-gold);
  color: var(--color-cream);
  border-color: var(--color-gold);
}

.nav--scrolled .nav__cta {
  color: var(--color-gold);
  border-color: var(--color-gold-dim);
  text-shadow: none;
}

.nav--scrolled .nav__cta:hover {
  background: var(--color-gold);
  color: var(--color-cream);
  border-color: var(--color-gold);
}

/* ================================
   Hero
   ================================ */
.hero {
  position: relative;
  height: 100svh;
  min-height: 600px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--color-green-deep);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
}

.hero__bg--1 {
  background-image: url('../img/rio-hero.jpg');
  animation: heroFade1 15s ease-in-out infinite;
}

.hero__bg--2 {
  background-image: url('../img/carnival-street.jpg');
  background-position: center top;
  opacity: 0;
  animation: heroFade2 15s ease-in-out infinite;
}

.hero__bg--3 {
  background-image: url('../img/carnival-option3.jpg');
  opacity: 0;
  animation: heroFade3 15s ease-in-out infinite;
}

@keyframes heroFade1 {
  0%, 28% { opacity: 1; }
  33%, 95% { opacity: 0; }
  100% { opacity: 1; }
}

@keyframes heroFade2 {
  0%, 28% { opacity: 0; }
  33%, 61% { opacity: 1; }
  66%, 100% { opacity: 0; }
}

@keyframes heroFade3 {
  0%, 61% { opacity: 0; }
  66%, 95% { opacity: 1; }
  100% { opacity: 0; }
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(15, 31, 23, 0.45) 0%,
    rgba(15, 31, 23, 0.15) 15%,
    rgba(15, 31, 23, 0.2) 30%,
    rgba(15, 31, 23, 0.55) 60%,
    rgba(15, 31, 23, 0.88) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: 0 var(--gap) 10vh;
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.5);
  margin-bottom: 1.25rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s ease 0.4s forwards;
}

.hero__title {
  font-size: clamp(3.5rem, 10vw, 8rem);
  color: var(--color-text-light);
  line-height: 0.95;
  margin-bottom: 0.75rem;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease 0.6s forwards;
}

.hero__subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 2rem);
  color: var(--color-gold-light);
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s ease 0.8s forwards;
}

.hero__desc {
  font-size: 1.125rem;
  color: rgba(240, 232, 216, 0.85);
  max-width: 460px;
  line-height: 1.7;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s ease 1s forwards;
}

.hero__dot {
  color: var(--color-gold-light);
  margin: 0 0.1em;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  right: var(--gap);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  opacity: 0;
  animation: fadeUp 0.8s ease 1.4s forwards;
}

.hero__scroll-indicator span {
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(240, 232, 216, 0.4);
  writing-mode: vertical-rl;
}

.hero__scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--color-gold), transparent);
  transform-origin: top;
  animation: scrollPulse 2.5s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.8; transform: scaleY(1); }
  50% { opacity: 0.2; transform: scaleY(0.5); }
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ================================
   Intro
   ================================ */
.intro {
  padding: var(--section-gap) 0;
}

.intro__content {
  max-width: 720px;
}

.intro__lead {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  line-height: 1.35;
  margin-bottom: 1.5rem;
  color: var(--color-green);
}

.intro__content p + p {
  margin-top: 1rem;
}

.intro__detail {
  margin-top: 2.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
}

/* ================================
   Trips
   ================================ */
.trips {
  padding: 0 0 var(--section-gap);
}

.trips__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
}

.trip-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(2rem, 4vw, 3.5rem);
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

/* Keep the CTAs on a shared baseline however much copy each card carries */
.trip-card .button {
  margin-top: auto;
  align-self: flex-start;
}

.trip-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-gold);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.5s ease;
}

.trip-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
}

.trip-card:hover::before {
  transform: scaleY(1);
}

.trip-card--featured {
  background: var(--color-green);
  color: var(--color-text-light);
  border-color: transparent;
}

.trip-card--featured::before {
  background: var(--color-gold-light);
}

.trip-card__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
  margin-bottom: 1rem;
}

.trip-card--featured .trip-card__label {
  color: var(--color-gold-light);
}

.trip-card__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 1.75rem;
  color: var(--color-green);
}

.trip-card--featured .trip-card__title {
  color: var(--color-text-light);
}

.trip-card__meta {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.trip-card--featured .trip-card__meta {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

.trip-card__duration {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.trip-card--featured .trip-card__duration {
  color: rgba(240, 232, 216, 0.6);
}

.trip-card__price {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-green);
}

.trip-card--featured .trip-card__price {
  color: var(--color-gold-light);
}

.trip-card__travel {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-top: -1.25rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
}

.trip-card--featured .trip-card__travel {
  color: rgba(240, 232, 216, 0.65);
}

.trip-card__desc {
  margin-bottom: 1.75rem;
  line-height: 1.7;
  font-size: 1rem;
}

.trip-card__register {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.trip-card--featured .trip-card__register {
  color: rgba(240, 232, 216, 0.65);
}

/* ================================
   Details
   ================================ */
.details {
  background: var(--color-green);
  color: var(--color-text-light);
  padding: var(--section-gap) 0;
}

.details__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 5rem);
}

.details h3 {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 1.25rem;
}

.details__optional-heading {
  margin-top: 2.5rem;
}

.details ul li {
  padding: 0.65em 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  font-size: 1rem;
  line-height: 1.55;
}

.details ul li:last-child {
  border-bottom: none;
}

.details__note {
  opacity: 0.5;
  font-size: 0.9375rem;
}

/* ================================
   Host
   ================================ */
.host {
  padding: var(--section-gap) 0;
}

.host__grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: start;
}

.host__image img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.host__eyebrow {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
  margin-bottom: 0.5rem;
}

.host__name {
  font-size: clamp(2rem, 4vw, 3.5rem);
  color: var(--color-green);
  margin-bottom: 1.5rem;
}

.host__content p {
  margin-bottom: 1rem;
}

.host__content em {
  font-style: italic;
}

/* ================================
   Interest / Form
   ================================ */
.interest {
  background: var(--color-cream-dark);
  padding: var(--section-gap) 0;
}

.interest__inner {
  max-width: 640px;
}

.interest__intro {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin-bottom: 3rem;
  line-height: 1.7;
}

.interest__form {
  margin-bottom: 4rem;
}

.form-group {
  margin-bottom: 2rem;
}

.form-group label,
.form-group legend {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
  width: 100%;
  padding: 0.75em 0;
  border: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.15);
  background: transparent;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  color: var(--color-text);
  transition: border-color 0.3s ease;
  border-radius: 0;
  -webkit-appearance: none;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
  outline: none;
  border-bottom-color: var(--color-gold);
  box-shadow: 0 2px 0 var(--color-gold);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group--fieldset {
  margin-bottom: 2.5rem;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.form-group .checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  cursor: pointer;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
  color: var(--color-text);
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-gold);
  flex-shrink: 0;
}

.interest__success {
  display: none;
  padding: 2.5rem;
  background: var(--color-green);
  color: var(--color-text-light);
  margin-bottom: 4rem;
}

.interest__success.visible {
  display: block;
}

.interest__success-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.5;
}

.interest__contact {
  padding-top: 3rem;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.interest__contact > p:first-child {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.interest__contact-people {
  display: flex;
  gap: 3rem;
}

.interest__contact-people div {
  line-height: 1.7;
}

.interest__contact a {
  color: var(--color-gold);
  text-decoration: none;
  transition: opacity 0.2s;
}

.interest__contact a:hover {
  opacity: 0.7;
}

/* ================================
   Footer
   ================================ */
.footer {
  background: var(--color-green-deep);
  color: rgba(240, 232, 216, 0.6);
  padding: 2.5rem 0;
  font-size: 0.875rem;
}

/* ================================
   Scroll Reveal
   ================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

.trips__grid [data-reveal]:nth-child(2) {
  transition-delay: 0.12s;
}

.details__grid [data-reveal]:nth-child(2) {
  transition-delay: 0.12s;
}

.host__grid [data-reveal]:nth-child(2) {
  transition-delay: 0.15s;
}

/* ================================
   Responsive
   ================================ */
@media (max-width: 900px) {
  .trips__grid {
    grid-template-columns: 1fr;
  }

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

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

  .host__image img {
    max-width: 280px;
  }

  .interest__contact-people {
    flex-direction: column;
    gap: 1.5rem;
  }
}

@media (max-width: 600px) {
  .hero__content {
    padding-bottom: 8vh;
  }

  .hero__scroll-indicator {
    display: none;
  }

  .trip-card {
    padding: 2rem;
  }

  .trip-card__meta {
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
  }

  .nav__logo {
    font-size: 1.125rem;
  }
}