/*
 * デザイントークン
 * ベース: デジタル庁デザインシステム（高コントラスト・視認性重視・派手な装飾の排除）
 * LocalTools / キューシェア と同じ配色トークンを使い、公開サイト間で見た目を統一している。
 */
:root {
  --color-primary: #1a56db;
  --color-primary-dark: #163f9e;
  --color-on-primary: #ffffff;
  --color-surface: #ffffff;
  --color-surface-alt: #f2f5fa;
  --color-on-surface: #1a1c1e;
  --color-on-surface-muted: #44474a;
  --color-outline: #c9cdd4;
  --color-success: #1e7d32;
  --color-danger: #c22a2a;

  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic",
    system-ui, sans-serif;
  --radius-card: 16px;
  --max-width: 960px;
}

:root[data-theme="dark"] {
  --color-primary: #86b1ff;
  --color-primary-dark: #5c8ee0;
  --color-on-primary: #0b1a33;
  --color-surface: #14171c;
  --color-surface-alt: #1c2027;
  --color-on-surface: #eceff1;
  --color-on-surface-muted: #b4b9c1;
  --color-outline: #3a3f47;
  --color-success: #7ed093;
  --color-danger: #f2a0a0;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}
html[data-theme="dark"] {
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--color-surface-alt);
  color: var(--color-on-surface);
  line-height: 1.75;
  line-break: strict;
  word-break: keep-all;
  overflow-wrap: break-word;
}

h1, h2, h3 {
  line-height: 1.4;
  color: var(--color-on-surface);
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

/* 英語のブランド名や数値+単位など、途中で改行されると読みにくい箇所をひとまとまりにする */
.nowrap {
  white-space: nowrap;
}

a {
  color: var(--color-primary);
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 0.75rem 1rem;
  z-index: 100;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ── ヘッダー ───────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-outline);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
  flex-wrap: wrap;
}
.logo {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--color-on-surface);
  margin-right: auto;
}
.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  overflow-x: auto;
}
.site-header nav a {
  text-decoration: none;
  color: var(--color-on-surface-muted);
  font-size: 0.92rem;
  white-space: nowrap;
}
.site-header nav a:hover {
  color: var(--color-primary);
}
#theme-toggle {
  border: 1px solid var(--color-outline);
  background: var(--color-surface);
  border-radius: 999px;
  width: 2.25rem;
  height: 2.25rem;
  cursor: pointer;
  font-size: 1rem;
  flex-shrink: 0;
}

/* ── 共通セクション ───────────────────────── */
.section {
  padding: 3.5rem 0;
}
.section-alt {
  background: var(--color-surface);
}
.section h2 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}
.section-lead {
  color: var(--color-on-surface-muted);
  margin-top: 0;
  margin-bottom: 1.5rem;
}

/* ── ヒーロー ───────────────────────────── */
.hero {
  padding: 4rem 0 3rem;
}
.hero-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
}
.avatar {
  width: 96px;
  height: 96px;
  border-radius: 22%;
  display: block;
}
.hero h1 {
  font-size: 2rem;
  margin: 0;
}
.tagline {
  font-size: 1.1rem;
  color: var(--color-on-surface-muted);
  margin: 0;
  max-width: 40rem;
}
.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

/* ── ボタン ───────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.3rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
}
.btn-bmc {
  background: #ffdd00;
  color: #1a1c1e;
}
.btn-bmc:hover {
  background: #f0d000;
}
.btn-small {
  padding: 0.35rem 0.8rem;
  font-size: 0.82rem;
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── 自己紹介・スキル ───────────────────── */
.skills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 1rem 0 0;
}
.skills li {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-outline);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.85rem;
  color: var(--color-on-surface-muted);
  white-space: nowrap;
}
.section-alt .skills li {
  background: var(--color-surface-alt);
}

/* ── カード ───────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.section-alt .card {
  background: var(--color-surface-alt);
}
.card h3 {
  margin: 0;
  font-size: 1.1rem;
}
.card p {
  margin: 0;
  color: var(--color-on-surface-muted);
  font-size: 0.92rem;
  flex-grow: 1;
}
.card .btn {
  align-self: flex-start;
  margin-top: 0.4rem;
}

/* ── 応援セクション ───────────────────────── */
.support-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.support-inner p {
  color: var(--color-on-surface-muted);
  max-width: 32rem;
}

/* ── フォーム ───────────────────────────── */
.contact-inner {
  max-width: 32rem;
  margin: 0 auto;
}
.contact-inner form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
/* flex-direction:columnの初期値(align-items:stretch)でボタンが幅いっぱいに
   伸びてしまい、他のボタンと見た目が揃わなくなるため、本来のサイズに戻す */
.contact-inner form button[type="submit"] {
  align-self: flex-start;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.field label {
  font-weight: 600;
  font-size: 0.9rem;
}
.required {
  color: var(--color-danger);
  font-weight: 700;
  font-size: 0.75rem;
  margin-left: 0.3rem;
}
input, select, textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--color-outline);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-on-surface);
}
textarea {
  resize: vertical;
}
.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
#form-status {
  min-height: 1.2em;
  font-size: 0.9rem;
  margin: 0;
}
#form-status.status-success {
  color: var(--color-success);
}
#form-status.status-error {
  color: var(--color-danger);
}

/* ── フッター ───────────────────────────── */
.site-footer {
  border-top: 1px solid var(--color-outline);
  background: var(--color-surface);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 1.25rem;
  color: var(--color-on-surface-muted);
  font-size: 0.85rem;
}
.footer-inner p {
  margin: 0;
}
.footer-inner nav {
  display: flex;
  gap: 1rem;
}
.footer-inner nav a {
  color: var(--color-on-surface-muted);
  text-decoration: none;
  white-space: nowrap;
}
.footer-inner nav a:hover {
  color: var(--color-primary);
}

/* ── 管理画面（/admin/） ───────────────────── */
.admin-page {
  padding: 3rem 1.25rem;
  max-width: 640px;
}
.admin-login {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 20rem;
}
.admin-toolbar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.contact-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.contact-item {
  border: 1px solid var(--color-outline);
  border-radius: 12px;
  padding: 1rem;
  background: var(--color-surface);
}
.contact-meta {
  font-size: 0.78rem;
  color: var(--color-on-surface-muted);
  margin: 0 0 0.5rem;
}
.contact-message {
  white-space: pre-wrap;
  margin: 0 0 0.75rem;
}

@media (max-width: 640px) {
  .site-header nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
  }
  .header-inner {
    justify-content: space-between;
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
}