/* ============================================================
   共通スタイル（全ページ共通）
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@500;700;800&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --color-primary: #008CCE;
  --color-primary-dark: #0071A8;
  --color-primary-light: #E6F5FC;
  --color-accent: #8DC556;
  --color-accent-dark: #6FA83C;
  --color-text: #1B2733;
  --color-text-sub: #5B6B78;
  --color-bg: #F5FAFC;
  --color-white: #FFFFFF;
  --color-border: #D9E6ED;
  --color-danger: #E5484D;

  --font-heading: 'M PLUS Rounded 1c', 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;

  --radius-bubble: 24px 24px 24px 4px;
  --radius-card: 16px;
  --radius-pill: 999px;

  --shadow-soft: 0 4px 16px rgba(0, 140, 206, 0.10);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  margin: 0;
  line-height: 1.4;
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- ヘッダー・フッター（共通ナビ） ---------- */

.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-logo::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  background: var(--color-accent);
  border-radius: 50%;
}

.nav-link {
  font-weight: 700;
  color: var(--color-primary-dark);
}

.top-link-bar {
  padding: 20px 0 0;
}

.top-link-bar .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.top-link-bar .nav-link::before {
  content: '←';
}

.bottom-link-bar {
  padding: 32px 0 48px;
}

/* ---------- ボタン ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  border: none;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(0, 140, 206, 0.35);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(141, 197, 86, 0.35);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-light);
}

.btn:disabled {
  background: #C6D2D9;
  color: #8C99A3;
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

/* ---------- フォーム部品 ---------- */

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
  font-size: 0.92rem;
}

.field .required {
  color: var(--color-danger);
  font-size: 0.8rem;
  margin-left: 4px;
}

.field input[type="text"],
.field input[type="password"],
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-white);
  color: var(--color-text);
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.field-help {
  margin: 6px 0 0;
  color: var(--color-text-sub);
  font-size: 0.8rem;
}

.radio-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  cursor: pointer;
}

.radio-group input {
  accent-color: var(--color-primary);
  width: 18px;
  height: 18px;
}

/* ---------- タブ ---------- */

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
}

.tab-btn {
  background: none;
  border: none;
  padding: 10px 18px;
  font-weight: 700;
  color: var(--color-text-sub);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* ---------- モーダル（ポップアップ） ---------- */

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(27, 39, 51, 0.55);
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-box {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: 32px;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.modal-box p {
  margin: 0 0 20px;
  font-weight: 700;
  font-size: 1.05rem;
}

.modal-box .modal-discord-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #5865F2;
  color: var(--color-white);
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  margin-bottom: 16px;
}

/* ---------- 汎用メッセージ ---------- */

.error-text {
  color: var(--color-danger);
  font-weight: 700;
  font-size: 0.92rem;
  margin: 4px 0 0;
}

.notice-banner {
  background: #FDEDED;
  border: 2px solid var(--color-danger);
  color: var(--color-danger);
  font-weight: 700;
  padding: 14px 18px;
  border-radius: 12px;
  margin-bottom: 20px;
}

.loading-text {
  color: var(--color-text-sub);
  padding: 20px 0;
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
  .modal-box {
    padding: 24px;
  }
}


.modal-box .modal-discord-error {
  color: var(--color-danger);
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0 0 16px;
}