:root {
  --bg: #f3f7fb;
  --surface: #ffffff;
  --ink: #1f2a37;
  --sub: #4a5d72;
  --line: #d2ddea;
  --brand: #1a4f8a;
  --brand-deep: #11385f;
  --accent: #e5a743;
  --shadow: 0 14px 32px rgba(17, 56, 95, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 85% 5%, #deebff 0%, rgba(222, 235, 255, 0) 35%),
    linear-gradient(180deg, #f9fbff 0%, #eef4fb 100%);
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: end;
  padding: 1.2rem 5vw 1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(7px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header.compact {
  align-items: center;
}

.brand h1,
.site-header h1 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.85rem);
}

.brand-kicker {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--sub);
}

nav {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  color: var(--brand-deep);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  font-size: 0.88rem;
  background: var(--surface);
}

nav a[aria-current="page"] {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.accent-link {
  border-color: #e8d0a7;
  background: #fff7e8;
}

main {
  padding: 2rem 5vw 3rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.6rem;
  background: var(--surface);
  border-radius: 18px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  padding: clamp(1.2rem, 2vw, 2rem);
}

.hero h2 {
  margin-top: 0.25rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  color: var(--sub);
}

.hero-photo {
  border-radius: 12px;
  min-height: 220px;
  border: 1px solid #c6d6e8;
  background: #f3f8ff;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.hero-photo-img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
  display: block;
}

.cta-row {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-top: 1.1rem;
}

.btn {
  text-decoration: none;
  background: var(--brand);
  color: #fff;
  border-radius: 999px;
  padding: 0.58rem 1.05rem;
  border: 1px solid var(--brand);
  font-size: 0.9rem;
}

.btn.ghost {
  background: #fff;
  color: var(--brand-deep);
}

.grid {
  margin-top: 1.4rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card,
.panel,
.login-card,
.teacher-card,
.notice-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.card,
.panel,
.notice-box,
.login-card,
.teacher-card {
  padding: 1.1rem;
}

.stack {
  display: grid;
  gap: 1rem;
}

.photo-grid {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.school-photo-card {
  margin: 0;
}

.school-photo-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid #c6d6e8;
  border-radius: 10px;
  background: #f3f8ff;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.school-photo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.school-photo-card figcaption {
  margin-top: 0.45rem;
  color: var(--sub);
  font-size: 0.9rem;
}

.monument-frame {
  max-width: 760px;
  margin-top: 0.75rem;
}

.photo-block,
.map-box {
  min-height: 105px;
  display: grid;
  place-items: center;
  border: 1px dashed #9eb2c8;
  border-radius: 10px;
  color: var(--sub);
  background: #f3f8ff;
}

.map-photo {
  display: block;
  width: min(680px, 100%);
  max-width: 100%;
  max-height: 420px;
  height: auto;
  object-fit: contain;
  border-radius: 10px;
  border: 1px solid #c6d6e8;
}

.teacher-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.teacher-card {
  overflow: hidden;
}

.image-zoom-trigger {
  border: 0;
  padding: 0;
  background: transparent;
  width: 100%;
  cursor: zoom-in;
}

.teacher-photo {
  display: block;
  max-width: 100%;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid #c6d6e8;
  margin-bottom: 0.7rem;
}

.principal-wrap {
  margin: 0.75rem 0 0.9rem;
}

.principal-photo {
  width: min(360px, 100%);
  height: auto;
  border-radius: 10px;
  border: 1px solid #c6d6e8;
  box-shadow: 0 10px 24px rgba(17, 56, 95, 0.12);
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: #dce9f8;
  color: var(--brand-deep);
  font-weight: 700;
}

.login-wrap {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 180px);
}

.login-card {
  width: min(520px, 100%);
}

form {
  display: grid;
  gap: 0.55rem;
}

input,
button {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #b5c9de;
  padding: 0.62rem 0.75rem;
  font-size: 0.96rem;
}

button {
  cursor: pointer;
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  margin-top: 0.45rem;
}

.error {
  color: #b21f3c;
  min-height: 1.3em;
  margin-bottom: 0;
}

.folder-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.folder-card {
  border: 1px solid #b7c9de;
  border-radius: 12px;
  padding: 0.9rem;
  background: #f8fbff;
  color: var(--ink);
  text-decoration: none;
  font-size: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: flex-start;
}

.folder-card:hover {
  transform: translateY(-1px);
}

.folder-icon {
  font-size: 2rem;
}

.table-wrap {
  overflow-x: auto;
}

.image-modal {
  position: fixed;
  inset: 0;
  background: rgba(12, 20, 31, 0.85);
  display: grid;
  place-items: center;
  padding: 1rem;
  z-index: 1000;
}

.image-modal[hidden] {
  display: none;
}

.image-modal img {
  max-width: min(92vw, 980px);
  max-height: 90vh;
  width: auto;
  height: auto;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 780px;
}

th,
td {
  border: 1px solid #c6d6e8;
  padding: 0.66rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #eaf2fb;
}

footer {
  padding: 1.1rem 5vw 2rem;
  color: var(--sub);
  font-size: 0.86rem;
}

@media (max-width: 900px) {
  .hero,
  .grid,
  .teacher-grid,
  .photo-grid,
  .folder-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    width: 100%;
  }
}