/* ========================================================
   Authentication Pages — login / register / forgot / reset
   ======================================================== */

.auth-layout {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: calc(100vh - 160px);
    padding: 48px 20px 80px;
    background: linear-gradient(160deg, #EAF6FD 0%, #F4F8FA 60%, #FFF8F0 100%);
}

.auth-card {
    background: #fff;
    width: 100%;
    max-width: 500px;
    border: 3px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 44px 44px 36px;
    box-shadow: var(--shadow-lg);
}

/* ヘッダーアイコン＋タイトル */
.auth-header {
    text-align: center;
    margin-bottom: 32px;
}
.auth-header i {
    font-size: 36px;
    color: var(--ims-primary);
    margin-bottom: 14px;
    display: block;
}
.auth-title {
    font-size: 26px;
    color: var(--charcoal);
    margin: 0 0 8px 0;
    letter-spacing: 0.02em;
}
.auth-subtitle {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 700;
    line-height: 1.6;
}

/* フォーム */
.auth-form .form-group { margin-bottom: 20px; }
.auth-form label {
    display: block;
    font-size: 13px;
    font-weight: 900;
    color: var(--charcoal);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}
.auth-form input[type="email"],
.auth-form input[type="password"],
.auth-form input[type="text"],
.auth-form select {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    font-family: inherit;
    font-weight: 500;
    border: 2px solid #D1D5DB;
    border-radius: var(--radius-sm);
    background: #fff;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    color: var(--text-main);
}
.auth-form input:focus,
.auth-form select:focus {
    border-color: var(--ims-primary);
    box-shadow: 0 0 0 3px rgba(0, 149, 217, 0.12);
}

/* 送信ボタン */
.auth-form .btn-submit {
    width: 100%;
    background: var(--ims-accent);
    color: #fff;
    border: 2px solid var(--border-color);
    padding: 16px;
    font-size: 16px;
    font-weight: 900;
    font-family: inherit;
    border-radius: var(--radius-pill);
    cursor: pointer;
    margin-top: 8px;
    box-shadow: 4px 4px 0 var(--border-color);
    transition: transform 0.15s, box-shadow 0.15s;
    letter-spacing: 0.03em;
}
.auth-form .btn-submit:hover {
    transform: translate(2px, 2px);
    box-shadow: var(--shadow-sm);
}

/* 代替アクション（「登録はこちら」など）をボタンで表示 */
.auth-alt {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 2px dashed #E5E7EB;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
}
.auth-alt-label {
    text-align: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 4px;
}
.btn-alt-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 20px;
    background: #fff;
    color: var(--charcoal);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-pill);
    font-size: 15px;
    font-weight: 900;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    letter-spacing: 0.02em;
}
.btn-alt-action:hover {
    background: var(--bg-section);
    transform: translate(1px, 1px);
    box-shadow: none;
    color: var(--charcoal);
}
.btn-alt-action.register {
    background: #F0FFF4;
    border-color: var(--green-disco);
    color: #065F46;
}
.btn-alt-action.register:hover { background: #D1FAE5; }

/* パスワードを忘れた方リンク */
.auth-forgot {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    font-weight: 700;
}
.auth-forgot a {
    color: var(--text-light);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.auth-forgot a:hover { color: var(--ims-primary); }

/* 後方互換（既存の .auth-links は残す） */
.auth-links { text-align: center; margin-top: 20px; font-size: 13px; font-weight: 700; }
.auth-links a { color: var(--ims-primary); text-decoration: underline; }

/* ============================
   ソーシャルログインボタン
   ============================ */
.social-login-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 4px;
}

.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 20px;
    border-radius: var(--radius-pill);
    font-size: 15px;
    font-weight: 900;
    font-family: inherit;
    border: 2px solid var(--border-color);
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s;
    box-sizing: border-box;
    box-shadow: 3px 3px 0 var(--border-color);
    letter-spacing: 0.02em;
}
.btn-social:hover {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.btn-google {
    background: #fff;
    color: var(--charcoal);
}
.btn-google:hover { background: #F9FAFB; color: var(--charcoal); }

.btn-line {
    background: #06C755;
    color: #fff;
}
.btn-line:hover { background: #05B34C; color: #fff; }

/* 区切り線 */
.social-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0 16px;
    color: var(--text-light);
    font-size: 12px;
    font-weight: 700;
}
.social-divider::before,
.social-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #E5E7EB;
}

/* KIZK共通アカウントバッジ */
.kizk-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #EAF6FD;
    border: 1px solid var(--ims-primary);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 700;
    color: var(--ims-primary-dark);
    margin-bottom: 18px;
}
.kizk-badge i { font-size: 13px; }

/* キャンペーンバナー */
.campaign-banner {
    background: linear-gradient(135deg, var(--gold-certified), #FFD700);
    color: var(--charcoal);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 900;
    margin-bottom: 20px;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    font-size: 14px;
    line-height: 1.5;
}

@media (max-width: 480px) {
    .auth-card {
        padding: 32px 24px 28px;
    }
    .auth-title { font-size: 22px; }
}