:root {
  --color-background: #f3f6ff;
  --color-background-alt: #eef7ff;
  --color-surface: #ffffff;
  --color-surface-soft: rgba(255, 255, 255, 0.78);
  --color-primary: #5c6bff;
  --color-primary-dark: #3f4bf0;
  --color-accent: #27d8c4;
  --color-text: #121c3a;
  --color-muted: #6e7aa6;
  --color-border: rgba(86, 106, 255, 0.18);
  --shadow-soft: 0 24px 70px rgba(84, 104, 255, 0.18);
  --shadow-card: 0 16px 40px rgba(30, 42, 96, 0.12);
  --radius-large: 28px;
  --radius-medium: 18px;
  --radius-small: 12px;
  font-family: 'Inter', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(160deg, var(--color-background) 0%, var(--color-background-alt) 100%);
  color: var(--color-text);
  min-height: 100vh;
}

a {
  color: var(--color-primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: relative;
  overflow: hidden;
  padding: 2.8rem 0 2rem;
}

.detail-header {
  padding-bottom: 1.8rem;
}

.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(40px);
  opacity: 0.55;
  z-index: 0;
}

.orb--one {
  width: 320px;
  height: 320px;
  top: -120px;
  left: -120px;
  background: radial-gradient(circle at 30% 30%, rgba(92, 107, 255, 0.65), transparent 60%);
}

.orb--two {
  width: 260px;
  height: 260px;
  top: -80px;
  right: -40px;
  background: radial-gradient(circle at 70% 20%, rgba(39, 216, 196, 0.6), transparent 70%);
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(140deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: #fff;
  font-weight: 700;
  font-size: 1.5rem;
  box-shadow: 0 12px 30px rgba(92, 107, 255, 0.45);
}

.site-title {
  margin: 0;
  font-size: clamp(1.6rem, 1.4rem + 1vw, 2.1rem);
}

.site-description {
  margin: 0.2rem 0 0;
  color: var(--color-muted);
}

.header-links {
  display: flex;
  gap: 1rem;
}

.header-link {
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  color: #fff;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.header-link:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(92, 107, 255, 0.35);
}

main {
  padding-bottom: 4rem;
}

.hero {
  margin-top: 1rem;
  margin-bottom: 2.5rem;
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.94) 10%, rgba(255, 255, 255, 0.7) 100%);
  border-radius: var(--radius-large);
  padding: clamp(1.8rem, 1.6rem + 1vw, 2.8rem);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(92, 107, 255, 0.12), rgba(39, 216, 196, 0.12));
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: rgba(92, 107, 255, 0.12);
  color: var(--color-primary-dark);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.hero h2 {
  margin: 0;
  font-size: clamp(2rem, 1.6rem + 1.4vw, 2.9rem);
  line-height: 1.25;
}

.hero-text {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button.primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  box-shadow: 0 14px 32px rgba(92, 107, 255, 0.4);
}

.button.primary:hover {
  transform: translateY(-2px);
}

.button.secondary {
  background: rgba(92, 107, 255, 0.12);
  color: var(--color-primary-dark);
}

.button.ghost {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(92, 107, 255, 0.35);
  color: var(--color-primary-dark);
}

.button.ghost:hover {
  background: rgba(255, 255, 255, 1);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  margin: 0;
}

.hero-metrics div {
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-medium);
  padding: 0.9rem 1.1rem;
  box-shadow: 0 12px 24px rgba(18, 28, 58, 0.08);
  backdrop-filter: blur(8px);
}

.hero-metrics dt {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-metrics dd {
  margin: 0.35rem 0 0;
  font-size: 1.6rem;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual__glow {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(92, 107, 255, 0.4), transparent 70%);
  animation: pulse 6s infinite alternate;
}

.hero-visual img {
  width: min(100%, 340px);
  filter: drop-shadow(0 20px 40px rgba(28, 33, 77, 0.25));
  position: relative;
  z-index: 1;
}

@keyframes pulse {
  from {
    transform: scale(0.9);
    opacity: 0.65;
  }
  to {
    transform: scale(1.05);
    opacity: 1;
  }
}

.filters {
  background: rgba(255, 255, 255, 0.72);
  border-radius: var(--radius-large);
  padding: 1.6rem 1.8rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
  margin-bottom: 2.5rem;
}

.search-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.search-field {
  flex: 1 1 260px;
  position: relative;
}

.search-field::after {
  content: '\1F50D';
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  opacity: 0.35;
}

.search-field input[type="search"] {
  width: 100%;
  padding: 0.85rem 1.1rem 0.85rem 2.6rem;
  border-radius: var(--radius-medium);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.92);
  font-size: 1rem;
  font-family: inherit;
}

.search-bar button {
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-medium);
  border: none;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(92, 107, 255, 0.35);
  transition: transform 0.2s ease;
}

.search-bar button:hover {
  transform: translateY(-1px);
}

.filter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  color: var(--color-muted);
  margin-bottom: 1.2rem;
}

.reset-filter {
  color: var(--color-primary-dark);
  font-weight: 600;
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(92, 107, 255, 0.25);
  background: rgba(255, 255, 255, 0.8);
  color: var(--color-muted);
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

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

.tag-pill.active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 12px 28px rgba(92, 107, 255, 0.35);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
}

.project-card {
  position: relative;
  background: var(--color-surface);
  border-radius: 24px;
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(92, 107, 255, 0.12), transparent 60%);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 50px rgba(18, 28, 58, 0.18);
}

.project-card:hover::before {
  opacity: 1;
}

.project-card__media {
  aspect-ratio: 16 / 10;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(92, 107, 255, 0.15), rgba(39, 216, 196, 0.15));
}

.project-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-card__placeholder {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: rgba(92, 107, 255, 0.6);
  font-size: 1.1rem;
}

.project-card__body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

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

.project-card__body p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.6;
}

.project-card__badge {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-primary-dark);
  font-weight: 600;
  background: rgba(92, 107, 255, 0.12);
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
}

.project-card__tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--color-primary-dark);
}

.project-card__tags li {
  padding: 0.35rem 0.8rem;
  background: rgba(39, 216, 196, 0.15);
  border-radius: 999px;
  font-size: 0.85rem;
}

.project-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.detail-link {
  font-weight: 700;
  position: relative;
  padding-right: 1.2rem;
}

.detail-link::after {
  content: '→';
  position: absolute;
  right: 0;
  transition: transform 0.2s ease;
}

.project-card:hover .detail-link::after {
  transform: translateX(4px);
}

.empty-state {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-large);
  padding: 2rem;
  text-align: center;
  color: var(--color-muted);
}

.site-footer {
  padding: 2rem 0 3rem;
  text-align: center;
  color: var(--color-muted);
}

.site-footer a {
  color: var(--color-primary-dark);
  font-weight: 600;
}

.project-detail {
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius-large);
  padding: clamp(1.8rem, 1.6rem + 1vw, 3rem);
  margin: 2rem 0 4rem;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(8px);
}

.detail-hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  align-items: center;
  margin-bottom: 2rem;
}

.detail-hero__media {
  background: linear-gradient(135deg, rgba(92, 107, 255, 0.18), rgba(39, 216, 196, 0.18));
  border-radius: var(--radius-medium);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(18, 28, 58, 0.18);
}

.detail-hero__media img {
  width: 100%;
  display: block;
}

.detail-hero__placeholder {
  display: grid;
  place-items: center;
  height: 100%;
  min-height: 220px;
  color: rgba(92, 107, 255, 0.6);
  font-weight: 700;
  font-size: 1.4rem;
}

.detail-hero__content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.detail-hero__content h1 {
  margin: 0;
  font-size: clamp(2rem, 1.6rem + 1vw, 2.6rem);
}

.detail-hero__content .summary {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.8;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
  color: var(--color-muted);
}

.detail-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(92, 107, 255, 0.12);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-size: 0.9rem;
}

.detail-meta strong {
  color: var(--color-primary-dark);
}

.tag-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tag-pills .tag {
  background: rgba(39, 216, 196, 0.2);
  color: var(--color-primary-dark);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font-weight: 600;
}

.project-gallery {
  margin: 0 -1.5rem 2rem;
  padding: 0 1.5rem;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 1fr);
  gap: 1.2rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 0.5rem;
}

.project-gallery__item {
  scroll-snap-align: start;
  border-radius: var(--radius-medium);
  overflow: hidden;
  position: relative;
  box-shadow: 0 16px 40px rgba(18, 28, 58, 0.18);
  background: #fff;
}

.project-gallery__item img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.detail-content {
  display: grid;
  gap: 1.8rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.detail-panel {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-medium);
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
}

.detail-panel h2 {
  margin-top: 0;
}

.detail-panel p {
  color: var(--color-muted);
  line-height: 1.8;
}

.detail-panel ul {
  margin: 0.6rem 0 0;
  padding-left: 1.1rem;
  color: var(--color-text);
  line-height: 1.7;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.4rem;
}

/* Admin */
.admin-layout {
  max-width: 1020px;
  margin: 2rem auto 4rem;
  padding: 0 1rem;
}

.admin-card {
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius-large);
  border: 1px solid var(--color-border);
  padding: 1.8rem 2rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 2.4rem;
  backdrop-filter: blur(6px);
}

.admin-card h2 {
  margin-top: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-group label {
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  padding: 0.75rem 0.9rem;
  font-family: inherit;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.95);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-medium);
  margin-bottom: 1.2rem;
  font-weight: 600;
}

.alert.success {
  background: rgba(39, 216, 196, 0.15);
  color: #12806d;
}

.alert.error {
  background: rgba(255, 107, 107, 0.15);
  color: #a11a1a;
}

.project-list {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
}

.project-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(18, 28, 58, 0.08);
}

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

.login-card {
  max-width: 420px;
  margin: 4rem auto;
}

/* Responsive */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-link {
    background: rgba(255, 255, 255, 0.28);
    color: var(--color-primary-dark);
  }

  .hero {
    padding: 1.8rem;
  }

  .hero-actions {
    width: 100%;
  }

  .button {
    width: 100%;
  }

  .filters {
    padding: 1.4rem;
  }

  .project-gallery {
    margin: 0 -1rem 2rem;
    padding: 0 1rem;
  }

  .detail-hero {
    grid-template-columns: 1fr;
  }

  .detail-meta span {
    width: 100%;
    justify-content: center;
  }

  .button-row {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .search-bar {
    flex-direction: column;
  }

  .search-bar button {
    width: 100%;
  }

  .hero-metrics {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
}