* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Meiryo", "Hiragino Kaku Gothic ProN", sans-serif;
       background: #f5f5f5; color: #333; line-height: 1.6; }
.page-header { background: #2c6e49; color: #fff; padding: 16px 24px;
               display: flex; justify-content: space-between; align-items: center; }
.page-header h1 { font-size: 1.3rem; }
.header-actions { display: flex; gap: 8px; }
.search-input, .modal-input { padding: 8px 12px; border: 1px solid #ccc;
                              border-radius: 4px; font-size: 0.95rem; }
.btn-primary { background: #2c6e49; color: #fff; border: none; padding: 8px 16px;
               border-radius: 4px; cursor: pointer; }
.btn-secondary { background: #ddd; color: #333; border: none; padding: 8px 16px;
                 border-radius: 4px; cursor: pointer; }
.btn-delete { background: #c0392b; color: #fff; border: none; padding: 4px 10px;
              border-radius: 4px; cursor: pointer; font-size: 0.85rem; }
main { padding: 24px; }
.plan-list { display: flex; flex-direction: column; gap: 8px; }
.plan-card { background: #fff; border-radius: 6px; padding: 12px 16px;
             display: flex; align-items: center; gap: 16px;
             box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.plan-link { flex: 1; color: #2c6e49; text-decoration: none; font-weight: bold; }
.plan-modified { color: #888; font-size: 0.85rem; }
.empty-message { color: #888; text-align: center; padding: 40px; }
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4);
                 display: flex; align-items: center; justify-content: center; }
.modal-dialog { background: #fff; border-radius: 8px; width: 360px; overflow: hidden; }
.modal-header { display: flex; justify-content: space-between; align-items: center;
                padding: 12px 16px; background: #2c6e49; color: #fff; }
.btn-modal-close { background: none; border: none; color: #fff; font-size: 1.4rem;
                   cursor: pointer; }
.modal-body { padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.modal-footer { padding: 12px 16px; display: flex; justify-content: flex-end; gap: 8px; }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
         background: #333; color: #fff; padding: 10px 20px; border-radius: 4px; }
.toast-error { background: #c0392b; }
.login-container { max-width: 420px; margin: 80px auto; background: #fff;
                   padding: 32px; border-radius: 8px; text-align: center; }
.login-container h1 { font-size: 1.2rem; margin-bottom: 12px; }
.login-container p { color: #666; margin-bottom: 24px; }