:root {
  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Lora", Georgia, serif;

  --color-neutral-900: #171717;
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #e5e5e5;
  --color-neutral-700: #404040;
  --color-neutral-600: #525252;
  --color-white: #fff;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-s: 1rem;
  --space-m: 2rem;
  --space-l: 4rem;
  --space-xl: 6rem;

  /* Layout */
  --max-width-article: 45rem;
  --max-width-site: 80rem;
  --header-height: 80px;

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration: 0.3s;
}

/* Base Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-serif);
  color: var(--color-neutral-900);
  background-color: var(--color-neutral-50);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  padding-bottom: var(--space-xl);
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  text-transform: uppercase;
  margin-bottom: var(--space-s);
  line-height: 0.9;
}

h2 {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: var(--space-m) 0 var(--space-s);
  color: var(--color-neutral-700);
  border-bottom: 1px solid var(--color-neutral-100);
  padding-bottom: 0.5rem;
  display: block;
}

p {
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

a {
  color: var(--color-neutral-900);
  text-decoration: none;
  border-bottom: 2px solid var(--color-neutral-200);
  transition: all var(--duration) var(--ease);
  padding-bottom: 1px;
}

a:hover {
  border-bottom-color: var(--color-neutral-900);
  background-color: rgba(0, 0, 0, 0.04);
}

/* Layout */
.main-content {
  max-width: var(--max-width-site);
  margin: 0 auto;
  padding: 0 var(--space-m);
}

.article.main-content {
  max-width: var(--max-width-article);
  margin-top: var(--space-l);
  position: relative;
}

/* Navigation & Header */
.backButton {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  border: none;
  padding: var(--space-s) 0;
  margin-bottom: var(--space-s);
  cursor: pointer;
  transition: color var(--duration) var(--ease);
}

.backButton:hover {
  color: var(--color-neutral-700);
  border-bottom: none;
  text-decoration: underline;
  background-color: transparent;
}

.backButton svg {
  transition: transform var(--duration) var(--ease);
}

.backButton:hover svg {
  transform: translateX(-1px);
}

/* Home Page (index.html) */
body.home {
  text-align: center;
  padding-top: var(--space-xl);
}

body.home h1 {
  max-width: 15ch;
  margin-left: auto;
  margin-right: auto;
  margin-top: var(--space-s);
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-neutral-600);
  display: block;
  margin-bottom: var(--space-s);
}

.lead {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--color-neutral-700);
  max-width: 60ch;
  margin: var(--space-m) auto var(--space-l);
  line-height: 1.6;
}

body.home p:not(.lead) {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-neutral-600);
  margin-bottom: 0.5rem;
}

/* Travel Tools (Search & Random) */
.travel-tools {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: var(--space-m) 0 var(--space-l);
  font-family: var(--font-sans);
}

.tool-input {
  background: var(--color-neutral-50);
  border: 1px solid var(--color-neutral-200);
  padding: 0.875rem 1.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
  width: 100%;
  max-width: 400px;
  outline: none;
  transition: all var(--duration) var(--ease);
  border-bottom: 2px solid var(--color-neutral-200);
}

.tool-input:focus {
  background: var(--color-white);
  border-color: var(--color-neutral-700);
  border-bottom-color: var(--color-neutral-700);
}

.tool-btn {
  background: var(--color-neutral-900);
  color: var(--color-white);
  border: none;
  padding: 0.875rem 2rem;
  font-family: inherit;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: background var(--duration) var(--ease), transform var(--duration) var(--ease);
}


.tool-btn:hover {
  background: var(--color-neutral-700);
}

/* Wonders Grid */
.wonders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: var(--space-xl);
  margin-left: var(--space-xl);
  margin-right: var(--space-xl);
}

.wonder-card {
  position: relative;
  border-bottom: none;
  overflow: hidden;
  background: var(--color-neutral-100);
  aspect-ratio: 4/5;
  display: flex;
  flex-direction: column;
}

.wonder-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.2, 1, 0.3, 1);
  filter: sepia(0.1) contrast(1.05);
}

.wonder-card:hover img {
  transform: scale(1.02);
  filter: sepia(0) contrast(1.1);
}

.wonder-card:hover {
  text-decoration: none;
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
  background-color: var(--color-neutral-100);
  border-bottom: none;
}

.wonder-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2.5rem 2rem;
  background: linear-gradient(0deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0) 100%);
  color: var(--color-white);
  text-align: left;
  transition: background var(--duration) var(--ease), padding var(--duration) var(--ease);
}

.wonder-card:hover .wonder-card-content {
  background: linear-gradient(0deg, var(--color-neutral-700) 0%, rgba(0,0,0,0) 100%);
  padding-bottom: 3rem;
}

.wonder-card h3 {
  font-size: 1.5rem;
  margin: 0;
  transition: transform var(--duration) var(--ease);
}

.wonder-card:hover h3 {
  transform: translateY(-2px);
}

.wonder-card.disabled {
  opacity: 0.6;
  filter: grayscale(1);
  pointer-events: none;
}

.coming-soon {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.5rem;
  opacity: 0.8;
}

.no-results {
  font-family: var(--font-sans);
  color: var(--color-neutral-600);
  margin-top: var(--space-m);
  display: none;
}

/* Article Elements (petra.html etc) */
.text {
  max-width: 70ch;
  margin-right: auto;
}

.text p:first-of-type::first-letter {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 3.5rem;
  float: left;
  line-height: 1;
  margin-right: 0.75rem;
  color: var(--color-neutral-700);
  text-transform: uppercase;
}

/* High-end Sidebar / Info Box */
.info {
  width: 100%;
  margin: var(--space-m) 0;
  background: var(--color-neutral-100);
  padding: 1.5rem;
  font-family: var(--font-sans);
}

@media (min-width: 1100px) {
  .article.main-content {
    max-width: 75rem;
    width: fit-content;
    margin: 2rem auto;
    display: grid;
    grid-template-columns: minmax(0, 70ch) 380px;
    column-gap: 2.5rem;
    row-gap: 0;
    align-items: start;
  }

  .backButton {
    grid-column: 1 / span 2;
    margin-bottom: 2rem;
  }

  h1 {
    grid-column: 1;
    grid-row: 2;
    margin-bottom: 2rem;
    align-self: start;
  }

  .text {
    grid-column: 1;
    grid-row: 3;
  }

  .info {
    position: sticky;
    top: 2rem;
    grid-column: 2;
    grid-row: 2 / span 2;
    width: 380px;
    margin: 0;
    transform: none;
    background: var(--color-neutral-50);
    border: 1px solid var(--color-neutral-200);
    padding: 2rem;
  }
}

.info figure {
  margin-bottom: 1.5rem;
}

.info img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.info figcaption {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-neutral-600);
  margin-top: 1rem;
  display: block;
  font-family: var(--font-sans);
  font-style: normal;
}

.info h2 {
  font-size: 0.875rem;
  margin-top: 0;
  border-bottom: 1px solid var(--color-neutral-200);
}

.info ul {
  list-style: none;
}

.info li {
  font-size: 0.875rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-neutral-200);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

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

.info li b {
  color: var(--color-neutral-600);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

/* Feedback Form */
.feedback {
  background: var(--color-white);
  padding: var(--space-l) var(--space-m);
  margin-top: var(--space-xl);
  border-top: 1px solid var(--color-neutral-100);
}

.feedback form {
  max-width: 600px;
  margin: 0 auto;
}

.feedback h2 {
  text-align: center;
  margin-bottom: var(--space-m);
}

.feedback fieldset {
  border: none;
  margin-bottom: 2rem;
}

.feedback legend {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--color-neutral-700);
  margin-bottom: 1.5rem;
}

.field {
  margin-bottom: 1.5rem;
}

.field label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.field input,
.field textarea {
  width: 100%;
  padding: 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 1px solid var(--color-neutral-200);
  background: var(--color-neutral-50);
  transition: border-color var(--duration) var(--ease);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-neutral-700);
  background: var(--color-white);
}

.feedback button {
  width: 100%;
  background: var(--color-neutral-900);
  color: var(--color-white);
  border: none;
  padding: 1.25rem;
  font-family: var(--font-sans);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background var(--duration) var(--ease);
}

.feedback button:hover {
  background: var(--color-neutral-700);
}

/* Footer */
footer {
  text-align: center;
  padding: var(--space-xl) var(--space-m);
  margin-top: var(--space-xl);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-neutral-600);
  opacity: 0.6;
  border-top: 1px solid var(--color-neutral-100);
}

/* Responsive */
@media (max-width: 1023px) {
  .info {
    max-width: 100%;
  }
}

@media (max-width: 600px) {
  .field-row {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 3rem;
  }

  .travel-tools {
    margin-left: var(--space-s);
    margin-right: var(--space-s);
  }
}