/* ==================================================
   💎 プレミアムボタン
================================================== */
.premium-btn {
    display: inline-block;
    margin-top: 30px;
    margin-left: 20px;
    padding: 14px 32px;
    background-color: #1e90ff;
    color: #fff;
    border-radius: 10px;
    text-decoration: none;
    font-size: 18px;
    transition: background 0.2s;
    font-weight: bold;
}

.premium-btn:hover {
    background-color: #0b78d1;
}

.premium-section {
    max-width: 900px;
    margin: 60px auto;
    text-align: center;
    line-height: 1.8;
}

.premium-section h1 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.premium-section .plans {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
}

.plan-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    width: 260px;
    padding: 20px;
    transition: 0.3s;
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.plan-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.plan-card p.price {
    font-size: 1.8rem;
    font-weight: bold;
    color: #1e90ff;
    margin: 10px 0;
}

.plan-card ul {
    text-align: left;
    margin: 0 auto;
    display: inline-block;
    padding-left: 0;
    list-style-position: inside;
}

.plan-card li {
    list-style: none;
    margin: 6px 0;
    padding-left: 0;
}

.plan-card form {
    margin-top: 15px;
}

.plan-card select {
    width: 100%;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid rgba(0, 0, 0, 0.15);
    background: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    transition: 0.2s;
}

body.dark-mode .plan-card select {
    background: rgba(20, 20, 30, 0.9);
    color: #eee;
    border-color: rgba(255, 255, 255, 0.2);
}

.plan-card select:hover,
.plan-card select:focus {
    border-color: #1e90ff;
    outline: none;
}

.plan-card .subscribe-btn {
    width: 100%;
    margin-top: 10px;
    padding: 10px 0;
    border: none;
    font-size: 1rem;
    background: #1e90ff;
    border-radius: 6px;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s;
}

.plan-card .subscribe-btn:hover {
    background: #0b78d1;
}

/* ログインしていない状態のグレーボタン */
.plan-card .login-btn {
    width: 100%;
    margin-top: 10px;
    padding: 10px 0;
    font-size: 1rem;
    background: #999;
    color: #fff;
    border-radius: 6px;
    cursor: not-allowed;
    opacity: 0.7;
}

/* サーバーがない場合のメッセージ */
.plan-card .no-server {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #aaa;
}

.subscribe-btn {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background: #1e90ff;
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.2s;
}

.subscribe-btn:hover {
    background: #0b78d1;
}

.note {
    color: #888;
    font-size: 0.9rem;
    margin-top: 30px;
}

.btn-return {
    display: inline-block;
    margin-top: 40px;
    padding: 12px 24px;
    background: #333;
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.2s;
}

.btn-return:hover {
    background: #444;
}

/* ==================================================
   💎 プレミアム成功ページ (/premium/success)
================================================== */
.success-content {
    text-align: center;
    padding: 40px 20px;
    max-width: 800px;
    margin: 0 auto;
}

.success-content h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.success-content p {
    color: #ccc;
    margin-bottom: 15px;
}

.success-content .plan-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 20px;
}

body.dark-mode .success-content .plan-card {
    background: rgba(20, 20, 30, 0.9);
}

.success-content .plan-info p {
    margin: 4px 0;
    color: #ddd;
    font-size: 0.95rem;
}

/* ==================================================
   💎 プレミアム管理ページ (/premium/manage)
================================================== */
.cancel-btn {
    margin-top: 15px;
    padding: 10px 20px;
    background-color: #a30000;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.2s;
}

.cancel-btn:hover {
    background-color: #d30000;
}

/* ==================================================
   ⚖️ 法的ページ（利用規約・プライバシー）の共通フッター
================================================== */
footer {
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
    color: #666;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 14px;
    background: transparent;
}

footer a {
    color: #1e90ff;
    text-decoration: none;
    margin: 0 5px;
    transition: color 0.2s;
}

footer a:hover {
    color: #0b78d1;
    text-decoration: underline;
}

/* === ダークモード対応 === */
body.dark-mode .footer {
    color: #aaa;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .footer a {
    color: #66b3ff;
}

body.dark-mode .footer a:hover {
    color: #99ccff;
}