@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500&family=Noto+Serif+JP:wght@400;600&display=swap');

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

:root {
  --bg: #F6F1EA;
  --surface: #FFFFFF;
  --text: #2E2A33;
  --sub: #7A7285;
  --border: #E0D8CC;
  --heading: #5E5468;
  --link: #8B7E9B;
  --link-hover: #6D5F80;
  --accent: #8B7E9B;
  --danger: #B5503E;
  --success-bg: #EAE0CC;
  --success-text: #5A4A2B;
  --success-border: #D4C4A0;
  --error-bg: #F5DCD6;
  --error-text: #7A3A2A;
  --error-border: #E5B5AA;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* Header & Nav */
header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

nav a {
  color: var(--sub);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.5px;
}

nav a:hover { color: var(--link); }

/* Headings */
h1 {
  font-family: 'Noto Serif JP', Georgia, 'Times New Roman', serif;
  font-size: 24px;
  font-weight: 600;
  color: var(--heading);
  letter-spacing: 2px;
  margin: 32px 0 8px;
}

h2 {
  font-family: 'Noto Serif JP', Georgia, serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--heading);
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  margin: 40px 0 16px;
}

h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--heading);
  margin: 24px 0 8px;
}

.subtitle {
  color: var(--sub);
  font-size: 13px;
  margin: 0 0 32px;
  letter-spacing: 1px;
}

p { margin: 0 0 16px; }

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover { color: var(--link-hover); }

ul, ol {
  margin: 0 0 16px;
  padding-left: 24px;
}

li { margin-bottom: 6px; }

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14px;
}

th {
  background: var(--heading);
  color: #fff;
  padding: 10px 14px;
  text-align: left;
  font-weight: 500;
  font-size: 13px;
}

td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tr:nth-child(even) td { background: rgba(0,0,0,0.02); }

/* Meta */
.updated {
  color: var(--sub);
  font-size: 13px;
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* Footer */
footer {
  margin-top: 0;
  padding: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--sub);
}

footer a {
  color: var(--link);
  text-decoration: none;
}

footer a:hover { text-decoration: underline; }

.copyright { margin-top: 8px; }

/* Portal doc list */
.doc-list {
  list-style: none;
  padding: 0;
  margin: 32px 0;
}

.doc-list li { margin-bottom: 12px; }

.doc-list a {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.doc-list a:hover {
  border-color: var(--link);
  box-shadow: 0 2px 8px rgba(139,126,155,0.15);
}

.doc-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--heading);
}

.doc-desc {
  font-size: 13px;
  color: var(--sub);
  margin-top: 2px;
}

/* Contact form */
form.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  margin: 24px 0;
}

label {
  display: block;
  font-size: 13px;
  color: var(--sub);
  margin: 18px 0 6px;
  letter-spacing: 0.5px;
}

label:first-of-type { margin-top: 0; }

.req { color: var(--danger); margin-left: 4px; }

input[type="text"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
}

textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.7;
}

.hidden { display: none !important; }

button[type="submit"] {
  margin-top: 24px;
  width: 100%;
  padding: 14px 20px;
  background: var(--accent);
  color: #FFF;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  letter-spacing: 1px;
  cursor: pointer;
  transition: opacity 0.15s;
}

button[type="submit"]:hover { opacity: 0.88; }
button[type="submit"]:disabled { opacity: 0.5; cursor: not-allowed; }

.result {
  margin-top: 20px;
  padding: 14px;
  border-radius: 8px;
  font-size: 14px;
  display: none;
}

.result.success {
  display: block;
  background: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
}

.result.error {
  display: block;
  background: var(--error-bg);
  color: var(--error-text);
  border: 1px solid var(--error-border);
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1A1720;
    --surface: #231F2A;
    --text: #E0D8EC;
    --sub: #9A8FAA;
    --border: #3A3344;
    --heading: #C4B4D8;
    --link: #C4B4D8;
    --link-hover: #D8CCEC;
    --accent: #A090B8;
    --success-bg: #2A2312;
    --success-text: #D4C08A;
    --success-border: #4A3A1E;
    --error-bg: #3A1E18;
    --error-text: #E8B5A8;
    --error-border: #6A2E24;
  }
}

/* Responsive */
@media (max-width: 600px) {
  .container { padding: 24px 16px 60px; }
  h1 { font-size: 20px; }
  h2 { font-size: 15px; }
  form.contact-form { padding: 20px 16px; }
}