:root {
  --color-bg: #ffffff;
  --color-surface: #f7f7f7;
  --color-header: #1a1a1a;
  --color-text: #1a1a1a;
  --color-text-muted: #5c5c5c;
  --color-border: #e8e8e8;
  --color-primary: #05a081;
  --color-primary-hover: #048a6f;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

a:hover {
  text-decoration: underline;
}

.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: -9999px;
  top: 0.5rem;
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  left: 0.5rem;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.header-primary {
  background: var(--color-header);
  color: #f5f5f5;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-primary__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-lg);
}

.logo {
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: #fff;
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.header-primary__search {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: #2d2d2d;
  border-radius: var(--radius-pill);
  padding: 0.35rem 1rem;
  border: 1px solid transparent;
}

.header-primary__search:focus-within {
  border-color: var(--color-primary);
  background: #333;
}

.header-primary__search-icon {
  flex-shrink: 0;
  opacity: 0.65;
}

.header-primary__input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  color: #fff;
  font: inherit;
  padding: 0.5rem 0;
}

.header-primary__input::placeholder {
  color: #9a9a9a;
}

.header-primary__input:focus {
  outline: none;
}

.header-primary__nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
}

.header-primary__link {
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: #e8e8e8;
  text-decoration: none;
}

.header-primary__link:hover {
  background: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.header-primary__link--btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.header-primary__link--btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: 1px solid var(--color-primary);
}

.header-primary__link--btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  text-decoration: none;
}

.header-primary__menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.header-primary__menu-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.header-primary__menu-bar {
  display: block;
  height: 2px;
  width: 22px;
  background: #fff;
  border-radius: 1px;
}

.mobile-nav {
  border-top: 1px solid #333;
  padding: var(--space-md);
  background: var(--color-header);
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav__links .header-primary__link {
  padding: var(--space-md);
  border-radius: var(--radius-sm);
}

.mobile-nav__links .header-primary__link--btn-primary,
.mobile-nav__links .header-primary__link--btn-secondary {
  text-align: center;
}

.hero-main {
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
  background: var(--color-bg);
}

.hero-main__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.hero-main__title {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero-main__lede {
  margin: 0 auto var(--space-xl);
  max-width: 42rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.hero-main__search {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  max-width: 640px;
  margin: 0 auto var(--space-lg);
  padding: 0.5rem 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: #fff;
  box-shadow: var(--shadow-card);
}

.hero-main__search:focus-within {
  border-color: var(--color-primary);
}

.hero-main__search-icon {
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.hero-main__input {
  flex: 1;
  min-width: 0;
  border: none;
  font: inherit;
  padding: 0.65rem 0;
  background: transparent;
}

.hero-main__input:focus {
  outline: none;
}

.hero-main__input::placeholder {
  color: #9a9a9a;
}

.trending {
  max-width: var(--max-width);
  margin: 0 auto;
}

.trending__label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.trending__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.trending__chip {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}

.trending__chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

.feature-grid-section {
  padding: 0 var(--space-md) var(--space-2xl);
}

.feature-grid {
  max-width: 1400px;
  margin: 0 auto;
  column-count: 4;
  column-gap: var(--space-md);
}

.photo-card {
  break-inside: avoid;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.photo-card__link {
  position: relative;
  display: block;
  color: inherit;
  text-decoration: none;
}

.photo-card__link:hover .photo-card__img {
  transform: scale(1.02);
}

.photo-card__img {
  width: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.photo-card__meta {
  padding: var(--space-sm) var(--space-md);
  background: #fff;
  border-top: 1px solid var(--color-border);
}

.photo-card__author {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.cta-primary {
  text-align: center;
  margin-top: var(--space-xl);
}

.btn-load-more {
  font: inherit;
  font-weight: 600;
  padding: 0.75rem 2.25rem;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(5, 160, 129, 0.35);
}

.btn-load-more:hover {
  background: var(--color-primary-hover);
}

.btn-load-more:focus-visible {
  outline: 2px solid var(--color-header);
  outline-offset: 3px;
}

.footer-standard {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) var(--space-md);
}

.footer-standard__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-standard__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer-standard__heading {
  margin: 0 0 var(--space-md);
  font-size: 1rem;
  font-weight: 700;
}

.footer-standard__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-standard__list li {
  margin-bottom: var(--space-sm);
}

.footer-standard__list a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-standard__list a:hover {
  color: var(--color-primary);
}

.footer-standard__legal {
  margin: var(--space-xl) 0 0;
  font-size: 0.8rem;
  color: #888;
  max-width: 52rem;
}

@media (max-width: 1024px) {
  .feature-grid {
    column-count: 3;
  }

  .header-primary__inner {
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-rows: auto auto;
  }

  .header-primary__search {
    grid-column: 1 / -1;
    order: 3;
  }

  .header-primary__nav {
    display: none;
  }

  .header-primary__menu-toggle {
    display: flex;
    justify-self: end;
  }
}

@media (max-width: 768px) {
  .feature-grid {
    column-count: 2;
  }

  .footer-standard__cols {
    grid-template-columns: 1fr;
  }

  .hero-main__lede {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .feature-grid {
    column-count: 1;
  }
}