:root {
  color-scheme: light;
  font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: #f7f8fb;
  color: #1c1d20;

  --primary: #2431ff;
  --primary-soft: #eef2ff;
  --primary-border: rgba(36, 49, 255, 0.3);
  --primary-contrast: #ffffff;
  --accent-underline: #9cf0ff;
  --tag-bg: rgba(36, 49, 255, 0.12);
  --tag-text: #2431ff;
  --button-shadow: rgba(36, 49, 255, 0.2);
  --form-focus: rgba(36, 49, 255, 0.2);
  --hero-gradient-1: #87b6ff;
  --hero-gradient-2: #f985ff;
  --hero-gradient-3: #72f3b2;
  --card-shadow: rgba(10, 20, 40, 0.1);
  --card-shadow-hover: rgba(10, 20, 40, 0.16);
  --card-border: rgba(29, 38, 91, 0.05);
}

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

body {
  margin: 0;
  line-height: 1.6;
  background: linear-gradient(180deg, #f5f7ff 0%, #f7f8fb 40%, #ffffff 100%);
}

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

[hidden] {
  display: none !important;
}

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

.container {
  width: min(100%, 1100px);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  background: rgba(10, 12, 23, 0.8);
  color: #ffffff;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(6px);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  justify-content: space-between;
  padding: 1rem 1.5rem;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.1rem;
  text-transform: uppercase;
}

.tagline {
  font-size: 0.85rem;
  opacity: 0.7;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.site-nav a {
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  height: 2px;
  width: 0;
  left: 0;
  bottom: -0.2rem;
  background: var(--accent-underline);
  transition: width 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  width: 100%;
}

.hero {
  padding: clamp(4rem, 10vw, 6rem) 0;
  text-align: center;
  position: relative;
  color: #ffffff;
  isolation: isolate;
  background-image: url("images/reindeer.jpeg");
  background-size: cover;
  background-position: center 20%;
  background-repeat: no-repeat;
  background-color: #0b0d19;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(7, 10, 24, 0.5);
  z-index: -1;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  margin-bottom: 0.8rem;
  font-weight: 700;
}

.hero p {
  margin: 0 auto 1.5rem;
  max-width: 35rem;
  color: rgba(255, 255, 255, 0.9);
}

.hero button,
.filters button,
.subscribe-form button {
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: var(--primary-contrast);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.hero button:hover,
.filters button:hover,
.subscribe-form button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px var(--button-shadow);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
  justify-content: center;
}

.filter-btn {
  background: var(--primary-soft);
  color: var(--primary);
}

.filter-btn.is-active {
  background: var(--primary);
  color: var(--primary-contrast);
}

.gallery {
  padding: 3.5rem 0;
}

.gallery header {
  text-align: center;
  margin-bottom: 2rem;
}

.gallery-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: #ffffff;
  border-radius: 1.25rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: 0 20px 35px var(--card-shadow);
  border: 1px solid var(--card-border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 40px var(--card-shadow-hover);
}

.card[role="button"] {
  cursor: pointer;
}

.card-art {
  border-radius: 1rem;
  padding-top: 56%;
  background: linear-gradient(
      135deg,
      var(--card-art-start, rgba(131, 196, 244, 0.85)),
      var(--card-art-end, rgba(139, 92, 246, 0.85))
  );
  position: relative;
  overflow: hidden;
}

.card-art::after {
  content: "";
  position: absolute;
  inset: 10%;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(2px);
}

.card-art img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-art--with-image {
  background: none;
}

.card-art--with-image::after {
  display: none;
}

.card h3 {
  margin: 0;
  font-size: 1.3rem;
}

.card p {
  margin: 0;
  color: #545866;
}

.card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.subscribe-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin: 1.5rem 0 0;
}

.subscribe-form input {
  flex: 1 1 220px;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--primary-border);
  font-size: 1rem;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.subscribe-form input:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--form-focus);
}

.form-message {
  margin-top: 0.5rem;
  min-height: 1.5rem;
  color: var(--primary);
  font-weight: 600;
}

.site-footer {
  background: #0a0c17;
  color: rgba(255, 255, 255, 0.7);
  padding: 1.5rem 0;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: block;
  padding: 0;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 10, 20, 0.75);
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
}

.lightbox-dialog {
  position: relative;
  z-index: 1;
  background: #ffffff;
  color: #1c1d20;
  width: 100vw;
  height: 100vh;
  max-width: none;
  max-height: none;
  border-radius: 0;
  overflow-y: auto;
}

.lightbox-content {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.1fr);
  min-height: 100%;
  align-items: start;
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: none;
  background: rgba(28, 29, 32, 0.08);
  color: #1c1d20;
  font-size: 1.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
  display: grid;
  place-items: center;
  line-height: 1;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
  background: rgba(28, 29, 32, 0.16);
  transform: translateY(-1px);
}

.lightbox-media {
  background: var(--primary-soft);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(3rem, 8vw, 5rem);
  min-height: 0;
  align-self: stretch;
}

.lightbox-media img {
  width: min(90vw, 960px);
  max-height: 85vh;
  border-radius: 1rem;
  box-shadow: 0 16px 35px rgba(12, 16, 34, 0.2);
  object-fit: contain;
}

.lightbox-details {
  padding: clamp(2rem, 6vw, 3rem);
  display: grid;
  gap: 1rem;
}

.lightbox-details h3 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.8rem);
}

.lightbox-details p {
  margin: 0;
  color: #4f566b;
}

.lightbox-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.lightbox-nav {
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: var(--primary-contrast);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.lightbox-nav:hover,
.lightbox-nav:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px var(--button-shadow);
}

.lightbox-nav:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.lightbox-nav--prev::before {
  content: "←";
  display: inline-block;
  font-size: 1.25rem;
  margin-right: 0.35rem;
}

.lightbox-nav--next::after {
  content: "→";
  display: inline-block;
  font-size: 1.25rem;
  margin-left: 0.35rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 960px) {
  .site-header .container {
    flex-wrap: wrap;
  }

  .site-nav {
    order: 3;
  }

  .lightbox-content {
    grid-template-columns: 1fr;
  }

  .lightbox-media img {
    max-height: 60vh;
  }
}

@media (max-width: 640px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
  }

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

  .lightbox-media img {
    max-height: 55vh;
  }

  .lightbox-details {
    padding: clamp(1.5rem, 6vw, 2.25rem);
  }
}