:root {
  --bg-gradient: linear-gradient(160deg, #0b1625 0%, #0f1f38 40%, #162a4a 100%);
  --text-color: #e6edf7;
  --muted-color: #b9c3d4;
  --link-color: #6ec1ff;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-strong: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.12);
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 14px 30px rgba(0, 0, 0, 0.45);
  --radius-lg: 18px;
  --radius-md: 14px;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
  transition: background 0.3s ease, color 0.3s ease;
}

body {
  margin: 0;
  background: var(--bg-gradient);
  min-height: 100vh;
  color: var(--text-color);
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover,
a:focus-visible {
  opacity: 0.8;
}

h1,
h2,
h3,
h4 {
  color: #ffffff;
  letter-spacing: 0.5px;
}

header,
.navbar,
.site-header {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.5rem 0;
}

footer {
  background: rgba(255, 255, 255, 0.04);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 2rem 0;
  color: #b9c3d4;
}

button,
.btn {
  background: linear-gradient(135deg, #1f3b73, #244a8f);
  border: none;
  border-radius: 10px;
  padding: 0.6rem 1rem;
  color: #ffffff;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover,
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.4);
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.site-header {
  padding: 1rem 0;
  text-align: center;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3.5vw, 2.3rem);
  font-weight: 600;
}

.projects,
.characters {
  padding: 1rem 0 3rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.card,
.universe-card,
.project-card,
.character-card,
.characters-toolbar,
.empty-state,
.sort-container {
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover,
.universe-card:hover,
.project-card:hover,
.character-card:hover,
.project-card:focus-within,
.character-card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.project-card {
  overflow: hidden;
  box-shadow: var(--shadow);
}

.project-link,
.character-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.project-image {
  width: 100%;
  height: 185px;
  object-fit: cover;
  display: block;
}

.project-content {
  padding: 1rem 1rem 1.2rem;
}

.project-title {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.project-description,
.universe-subtitle {
  margin: 0;
  color: var(--muted-color);
  line-height: 1.5;
  font-size: 0.95rem;
}

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

.home-link,
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--link-color);
  font-weight: 600;
}

.characters-toolbar {
  position: sticky;
  top: 0.8rem;
  z-index: 10;
  margin-top: 1rem;
  padding: 0.9rem;
  box-shadow: var(--shadow);
}

.characters-filters {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.filter-group {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted-color);
}

.filter-group span {
  font-weight: 600;
}

.filter-group select,
.filter-group input,
.sort-container select {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  padding: 0.6rem 0.7rem;
  font: inherit;
  color: var(--text-color);
  background: rgba(6, 12, 22, 0.75);
}

.filter-group select:focus-visible,
.filter-group input:focus-visible,
#reset-filters:focus-visible,
.character-link:focus-visible,
.sort-container select:focus-visible {
  outline: none;
  border-color: #6ec1ff;
  box-shadow: 0 0 0 3px rgba(110, 193, 255, 0.25);
}

.results-count {
  margin: 0.7rem 0 0;
  font-weight: 600;
  color: #a8d8ff;
}

.empty-state {
  margin-top: 1rem;
  border-style: dashed;
  border-color: rgba(110, 193, 255, 0.45);
  padding: 1rem;
  text-align: center;
}

.empty-state p {
  margin: 0 0 0.75rem;
  font-weight: 600;
}

#reset-filters {
  border-radius: 999px;
  font-weight: 600;
}

.characters-grid {
  margin-top: 1rem;
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(2, 1fr);
  align-items: stretch;
  padding: 1rem 0;
}

.character-card {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
}

.character-card.is-hidden {
  opacity: 0;
  transform: scale(0.96);
  pointer-events: none;
  display: none;
}

.character-image {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 0.8rem;
  display: block;
  transition: transform 0.3s ease;
}

.character-card:hover .character-image,
.character-card:focus-within .character-image {
  transform: scale(1.03);
}

.character-image-wrap {
  position: relative;
}

.character-flag {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 12px rgba(17, 24, 39, 0.2);
}

.character-name {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
}

.character-japanese-name,
.character-team {
  margin: 0.3rem 0 0;
  color: #d7dfef;
  font-size: 0.82rem;
}

.character-position {
  width: fit-content;
  margin: 0.5rem 0 0;
  padding: 0.16rem 0.6rem;
  border-radius: 999px;
  background: rgba(191, 219, 254, 0.2);
  color: #dbeafe;
  font-size: 0.76rem;
  font-weight: 700;
}

.character-description {
  margin: 0.4rem 0 0;
  font-size: 0.8rem;
  color: #e0e6f2;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sort-container {
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  font-size: 0.84rem;
}

@media (min-width: 600px) {
  #characters-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

@media (min-width: 900px) {
  .site-header {
    padding-top: 1.25rem;
  }

  .projects-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  #characters-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}